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							- mbed TLS ChangeLog (Sorted per branch, date)
 
- = mbed TLS 2.16.5 branch released 2020-02-20
 
- Security
 
-    * Fix potential memory overread when performing an ECDSA signature
 
-      operation. The overread only happens with cryptographically low
 
-      probability (of the order of 2^-n where n is the bitsize of the curve)
 
-      unless the RNG is broken, and could result in information disclosure or
 
-      denial of service (application crash or extra resource consumption).
 
-      Found by Auke Zeilstra and Peter Schwabe, using static analysis.
 
-    * To avoid a side channel vulnerability when parsing an RSA private key,
 
-      read all the CRT parameters from the DER structure rather than
 
-      reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob
 
-      Brumley. Reported and fix contributed by Jack Lloyd.
 
-      ARMmbed/mbed-crypto#352
 
- Bugfix
 
-    * Fix an unchecked call to mbedtls_md() in the x509write module.
 
-    * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some
 
-      RSA keys that would later be rejected by functions expecting private
 
-      keys. Found by Catena cyber using oss-fuzz (issue 20467).
 
-    * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some
 
-      RSA keys with invalid values by silently fixing those values.
 
- = mbed TLS 2.16.4 branch released 2020-01-15
 
- Security
 
-    * Fix side channel vulnerability in ECDSA. Our bignum implementation is not
 
-      constant time/constant trace, so side channel attacks can retrieve the
 
-      blinded value, factor it (as it is smaller than RSA keys and not guaranteed
 
-      to have only large prime factors), and then, by brute force, recover the
 
-      key. Reported by Alejandro Cabrera Aldaya and Billy Brumley.
 
-    * Zeroize local variables in mbedtls_internal_aes_encrypt() and
 
-      mbedtls_internal_aes_decrypt() before exiting the function. The value of
 
-      these variables can be used to recover the last round key. To follow best
 
-      practice and to limit the impact of buffer overread vulnerabilities (like
 
-      Heartbleed) we need to zeroize them before exiting the function.
 
-      Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai,
 
-      Grant Hernandez, and Kevin Butler (University of Florida) and
 
-      Dave Tian (Purdue University).
 
-    * Fix side channel vulnerability in ECDSA key generation. Obtaining precise
 
-      timings on the comparison in the key generation enabled the attacker to
 
-      learn leading bits of the ephemeral key used during ECDSA signatures and to
 
-      recover the private key. Reported by Jeremy Dubeuf.
 
-    * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught
 
-      failures could happen with alternative implementations of AES. Bug
 
-      reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri,
 
-      Sectra.
 
- Bugfix
 
-    * Remove redundant line for getting the bitlen of a bignum, since the variable
 
-      holding the returned value is overwritten a line after.
 
-      Found by irwir in #2377.
 
-    * Support mbedtls_hmac_drbg_set_entropy_len() and
 
-      mbedtls_ctr_drbg_set_entropy_len() before the DRBG is seeded. Before,
 
-      the initial seeding always reset the entropy length to the compile-time
 
-      default.
 
- Changes
 
-    * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx()
 
-      from the cipher abstraction layer. Fixes #2198.
 
-    * Clarify how the interface of the CTR_DRBG and HMAC modules relates to
 
-      NIST SP 800-90A. In particular CTR_DRBG requires an explicit nonce
 
-      to achieve a 256-bit strength if MBEDTLS_ENTROPY_FORCE_SHA256 is set.
 
- = mbed TLS 2.16.3 branch released 2019-09-06
 
- Security
 
-    * Fix a missing error detection in ECJPAKE. This could have caused a
 
-      predictable shared secret if a hardware accelerator failed and the other
 
-      side of the key exchange had a similar bug.
 
-    * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to
 
-      implement blinding. Because of this for the same key and message the same
 
-      blinding value was generated. This reduced the effectiveness of the
 
-      countermeasure and leaked information about the private key through side
 
-      channels. Reported by Jack Lloyd.
 
-    * When writing a private EC key, use a constant size for the private
 
-      value, as specified in RFC 5915. Previously, the value was written
 
-      as an ASN.1 INTEGER, which caused the size of the key to leak
 
-      about 1 bit of information on average and could cause the value to be
 
-      1 byte too large for the output buffer.
 
- API Changes
 
-    * The new function mbedtls_ecdsa_sign_det_ext() is similar to
 
-      mbedtls_ecdsa_sign_det() but allows passing an external RNG for the
 
-      purpose of blinding.
 
- Bugfix
 
-    * Fix to allow building test suites with any warning that detects unused
 
-      functions. Fixes #1628.
 
-    * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture.
 
-    * Remove redundant include file in timing.c. Fixes #2640 reported by irwir.
 
-    * Fix Visual Studio Release x64 build configuration by inheriting
 
-      PlatformToolset from the project configuration. Fixes #1430 reported by
 
-      irwir.
 
-    * Enable Suite B with subset of ECP curves. Make sure the code compiles even
 
-      if some curves are not defined. Fixes #1591 reported by dbedev.
 
-    * Fix misuse of signed arithmetic in the HAVEGE module. #2598
 
-    * Update test certificates that were about to expire. Reported by
 
-      Bernhard M. Wiedemann in #2357.
 
-    * Fix the build on ARMv5TE in ARM mode to not use assembly instructions
 
-      that are only available in Thumb mode. Fix contributed by Aurelien Jarno
 
-      in #2169.
 
-    * Fix undefined memset(NULL) call in test_suite_nist_kw.
 
-    * Make NV seed test support MBEDTLS_ENTROPY_FORCE_SHA256.
 
-    * Fix propagation of restart contexts in restartable EC operations.
 
-      This could previously lead to segmentation faults in builds using an
 
-      address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE.
 
-    * Fix memory leak in in mpi_miller_rabin(). Contributed by
 
-      Jens Wiklander <jens.wiklander@linaro.org> in #2363
 
-    * Improve code clarity in x509_crt module, removing false-positive
 
-      uninitialized variable warnings on some recent toolchains (GCC8, etc).
 
-      Discovered and fixed by Andy Gross (Linaro), #2392.
 
-    * Zero length buffer check for undefined behavior in
 
-      mbedtls_platform_zeroize(). Fixes ARMmbed/mbed-crypto#49.
 
-    * Fix bug in endianness conversion in bignum module. This lead to
 
-      functionally incorrect code on bigendian systems which don't have
 
-      __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622.
 
- Changes
 
-    * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h
 
-      suggests). #2671
 
-    * Make `make clean` clean all programs always. Fixes #1862.
 
- = mbed TLS 2.16.2 branch released 2019-06-11
 
- Security
 
-    * Make mbedtls_ecdh_get_params return an error if the second key
 
-      belongs to a different group from the first. Before, if an application
 
-      passed keys that belonged to different group, the first key's data was
 
-      interpreted according to the second group, which could lead to either
 
-      an error or a meaningless output from mbedtls_ecdh_get_params. In the
 
-      latter case, this could expose at most 5 bits of the private key.
 
- Bugfix
 
-    * Server's RSA certificate in certs.c was SHA-1 signed. In the default
 
-      mbedTLS configuration only SHA-2 signed certificates are accepted.
 
-      This certificate is used in the demo server programs, which lead the
 
-      client programs to fail at the peer's certificate verification
 
-      due to an unacceptable hash signature. The certificate has been
 
-      updated to one that is SHA-256 signed. Fix contributed by
 
-      Illya Gerasymchuk.
 
-    * Fix private key DER output in the key_app_writer example. File contents
 
-      were shifted by one byte, creating an invalid ASN.1 tag. Fixed by
 
-      Christian Walther in #2239.
 
-    * Fix potential memory leak in X.509 self test. Found and fixed by
 
-      Junhwan Park, #2106.
 
-    * Reduce stack usage of hkdf tests. Fixes #2195.
 
-    * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when
 
-      used with negative inputs. Found by Guido Vranken in #2404. Credit to
 
-      OSS-Fuzz.
 
-    * Fix bugs in the AEAD test suite which would be exposed by ciphers which
 
-      either used both encrypt and decrypt key schedules, or which perform padding.
 
-      GCM and CCM were not affected. Fixed by Jack Lloyd.
 
-    * Fix incorrect default port number in ssl_mail_client example's usage.
 
-      Found and fixed by irwir. #2337
 
-    * Add missing parentheses around parameters in the definition of the
 
-      public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation
 
-      in case operators binding less strongly than subtraction were used
 
-      for the parameter.
 
-    * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl
 
-      sni entry parameter. Reported by inestlerode in #560.
 
-    * Add DER-encoded test CRTs to library/certs.c, allowing
 
-      the example programs ssl_server2 and ssl_client2 to be run
 
-      if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254.
 
-    * Fix missing bounds checks in X.509 parsing functions that could
 
-      lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437.
 
-    * Fix multiple X.509 functions previously returning ASN.1 low-level error
 
-      codes to always wrap these codes into X.509 high level error codes before
 
-      returning. Fixes #2431.
 
- Changes
 
-    * Return from various debugging routines immediately if the
 
-      provided SSL context is unset.
 
-    * Remove dead code from bignum.c in the default configuration.
 
-      Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309.
 
-    * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh.
 
-      Contributed by Peter Kolbus (Garmin).
 
-    * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to
 
-      improve clarity. Fixes #2258.
 
-    * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821.
 
- = mbed TLS 2.16.1 branch released 2019-03-19
 
- Features
 
-    * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites
 
-      from the default list (enabled by default). See
 
-      https://sweet32.info/SWEET32_CCS16.pdf.
 
- Bugfix
 
-    * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined
 
-      when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242.
 
-    * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined.
 
-      Raised as a comment in #1996.
 
-    * Reduce the stack consumption of mbedtls_mpi_fill_random() which could
 
-      previously lead to a stack overflow on constrained targets.
 
-    * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions
 
-      in the header files, which missed the precompilation check. #971
 
-    * Fix clobber list in MIPS assembly for large integer multiplication.
 
-      Previously, this could lead to functionally incorrect assembly being
 
-      produced by some optimizing compilers, showing up as failures in
 
-      e.g. RSA or ECC signature operations. Reported in #1722, fix suggested
 
-      by Aurelien Jarno and submitted by Jeffrey Martin.
 
-    * Fix signed-to-unsigned integer conversion warning
 
-      in X.509 module. Fixes #2212.
 
-    * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion.
 
-      Fixes #2190.
 
-    * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326.
 
-    * Remove the mbedtls namespacing from the header file, to fix a "file not found"
 
-      build error. Fixed by Haijun Gu #2319.
 
-    * Fix returning the value 1 when mbedtls_ecdsa_genkey failed.
 
-    * Fix false failure in all.sh when backup files exist in include/mbedtls
 
-      (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407.
 
-    * Ensure that unused bits are zero when writing ASN.1 bitstrings when using
 
-      mbedtls_asn1_write_bitstring().
 
-    * Fix issue when writing the named bitstrings in KeyUsage and NsCertType
 
-      extensions in CSRs and CRTs that caused these bitstrings to not be encoded
 
-      correctly as trailing zeroes were not accounted for as unused bits in the
 
-      leading content octet. Fixes #1610.
 
- Changes
 
-    * Include configuration file in all header files that use configuration,
 
-      instead of relying on other header files that they include.
 
-      Inserted as an enhancement for #1371
 
-    * Add support for alternative CSR headers, as used by Microsoft and defined
 
-      in RFC 7468. Found by Michael Ernst. Fixes #767.
 
-    * Fix configuration queries in ssl-opt.h. #2030
 
-    * Ensure that ssl-opt.h can be run in OS X. #2029
 
-    * Reduce the complexity of the timing tests. They were assuming more than the
 
-      underlying OS actually guarantees.
 
-    * Re-enable certain interoperability tests in ssl-opt.sh which had previously
 
-      been disabled for lack of a sufficiently recent version of GnuTLS on the CI.
 
-    * Ciphersuites based on 3DES now have the lowest priority by default when
 
-      they are enabled.
 
- = mbed TLS 2.16.0 branch released 2018-12-21
 
- Features
 
-    * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation
 
-      of parameters in the API. This allows detection of obvious misuses of the
 
-      API, such as passing NULL pointers. The API of existing functions hasn't
 
-      changed, but requirements on parameters have been made more explicit in
 
-      the documentation. See the corresponding API documentation for each
 
-      function to see for which parameter values it is defined. This feature is
 
-      disabled by default. See its API documentation in config.h for additional
 
-      steps you have to take when enabling it.
 
- API Changes
 
-    * The following functions in the random generator modules have been
 
-      deprecated and replaced as shown below. The new functions change
 
-      the return type from void to int to allow returning error codes when
 
-      using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest
 
-      primitive. Fixes #1798.
 
-      mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret()
 
-      mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret()
 
-    * Extend ECDH interface to enable alternative implementations.
 
-    * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for
 
-      ARIA, CAMELLIA and Blowfish. These error codes will be replaced by
 
-      the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA.
 
-    * Additional parameter validation checks have been added for the following
 
-      modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH,
 
-      ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI.
 
-      Where modules have had parameter validation added, existing parameter
 
-      checks may have changed. Some modules, such as Chacha20 had existing
 
-      parameter validation whereas other modules had little. This has now been
 
-      changed so that the same level of validation is present in all modules, and
 
-      that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default
 
-      is off. That means that checks which were previously present by default
 
-      will no longer be.
 
- New deprecations
 
-    * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update
 
-      in favor of functions that can return an error code.
 
- Bugfix
 
-    * Fix for Clang, which was reporting a warning for the bignum.c inline
 
-      assembly for AMD64 targets creating string literals greater than those
 
-      permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482.
 
-    * Fix runtime error in `mbedtls_platform_entropy_poll()` when run
 
-      through qemu user emulation. Reported and fix suggested by randombit
 
-      in #1212. Fixes #1212.
 
-    * Fix an unsafe bounds check when restoring an SSL session from a ticket.
 
-      This could lead to a buffer overflow, but only in case ticket authentication
 
-      was broken. Reported and fix suggested by Guido Vranken in #659.
 
-    * Add explicit integer to enumeration type casts to example program
 
-      programs/pkey/gen_key which previously led to compilation failure
 
-      on some toolchains. Reported by phoenixmcallister. Fixes #2170.
 
-    * Fix double initialization of ECC hardware that made some accelerators
 
-      hang.
 
-    * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence
 
-      of check for certificate/key matching. Reported by Attila Molnar, #507.
 
- = mbed TLS 2.14.1 branch released 2018-11-30
 
- Security
 
-    * Fix timing variations and memory access variations in RSA PKCS#1 v1.5
 
-      decryption that could lead to a Bleichenbacher-style padding oracle
 
-      attack. In TLS, this affects servers that accept ciphersuites based on
 
-      RSA decryption (i.e. ciphersuites whose name contains RSA but not
 
-      (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute),  Robert Gillham
 
-      (University of Adelaide), Daniel Genkin (University of Michigan),
 
-      Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom
 
-      (University of Adelaide, Data61). The attack is described in more detail
 
-      in the paper available here: http://cat.eyalro.net/cat.pdf  CVE-2018-19608
 
-    * In mbedtls_mpi_write_binary(), don't leak the exact size of the number
 
-      via branching and memory access patterns. An attacker who could submit
 
-      a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing
 
-      of the decryption and not its result could nonetheless decrypt RSA
 
-      plaintexts and forge RSA signatures. Other asymmetric algorithms may
 
-      have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham,
 
-      Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom.
 
-    * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG
 
-      modules.
 
- API Changes
 
-    * The new functions mbedtls_ctr_drbg_update_ret() and
 
-      mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update()
 
-      and mbedtls_hmac_drbg_update() respectively, but the new functions
 
-      report errors whereas the old functions return void. We recommend that
 
-      applications use the new functions.
 
- = mbed TLS 2.14.0 branch released 2018-11-19
 
- Security
 
-    * Fix overly strict DN comparison when looking for CRLs belonging to a
 
-      particular CA. This previously led to ignoring CRLs when the CRL's issuer
 
-      name and the CA's subject name differed in their string encoding (e.g.,
 
-      one using PrintableString and the other UTF8String) or in the choice of
 
-      upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue
 
-      #1784.
 
-    * Fix a flawed bounds check in server PSK hint parsing. In case the
 
-      incoming message buffer was placed within the first 64KiB of address
 
-      space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker
 
-      to trigger a memory access up to 64KiB beyond the incoming message buffer,
 
-      potentially leading to an application crash or information disclosure.
 
-    * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The
 
-      previous settings for the number of rounds made it practical for an
 
-      adversary to construct non-primes that would be erroneously accepted as
 
-      primes with high probability. This does not have an impact on the
 
-      security of TLS, but can matter in other contexts with numbers chosen
 
-      potentially by an adversary that should be prime and can be validated.
 
-      For example, the number of rounds was enough to securely generate RSA key
 
-      pairs or Diffie-Hellman parameters, but was insufficient to validate
 
-      Diffie-Hellman parameters properly.
 
-      See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and
 
-      Kenneth G. Paterson and Juraj Somorovsky.
 
- Features
 
-    * Add support for temporarily suspending expensive ECC computations after
 
-      some configurable amount of operations. This is intended to be used in
 
-      constrained, single-threaded systems where ECC is time consuming and can
 
-      block other operations until they complete. This is disabled by default,
 
-      but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and
 
-      configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new
 
-      xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported
 
-      yet), and to existing functions in ECDH and SSL (currently only
 
-      implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2,
 
-      including client authentication).
 
-    * Add support for Arm CPU DSP extensions to accelerate asymmetric key
 
-      operations. On CPUs where the extensions are available, they can accelerate
 
-      MPI multiplications used in ECC and RSA cryptography. Contributed by
 
-      Aurelien Jarno.
 
-    * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS
 
-      signature always used a salt with the same length as the hash, and returned
 
-      an error if this was not possible. Now the salt size may be up to two bytes
 
-      shorter. This allows the library to support all hash and signature sizes
 
-      that comply with FIPS 186-4, including SHA-512 with a 1024-bit key.
 
-    * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter
 
-      than 256 bits limits the security of generated material to 128 bits.
 
- API Changes
 
-    * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for
 
-      a feature that is not supported by underlying alternative
 
-      implementations implementing cryptographic primitives. This is useful for
 
-      hardware accelerators that don't implement all options or features.
 
- New deprecations
 
-    * All module specific errors following the form
 
-      MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not
 
-      supported are deprecated and are now replaced by the new equivalent
 
-      platform error.
 
-    * All module specific generic hardware acceleration errors following the
 
-      form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced
 
-      by the equivalent plaform error.
 
-    * Deprecate the function mbedtls_mpi_is_prime() in favor of
 
-      mbedtls_mpi_is_prime_ext() which allows specifying the number of
 
-      Miller-Rabin rounds.
 
- Bugfix
 
-    * Fix wrong order of freeing in programs/ssl/ssl_server2 example
 
-      application leading to a memory leak in case both
 
-      MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set.
 
-      Fixes #2069.
 
-    * Fix a bug in the update function for SSL ticket keys which previously
 
-      invalidated keys of a lifetime of less than a 1s. Fixes #1968.
 
-    * Fix failure in hmac_drbg in the benchmark sample application, when
 
-      MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095
 
-    * Fix a bug in the record decryption routine ssl_decrypt_buf()
 
-      which lead to accepting properly authenticated but improperly
 
-      padded records in case of CBC ciphersuites using Encrypt-then-MAC.
 
-    * Fix memory leak and freeing without initialization in the example
 
-      program programs/x509/cert_write. Fixes #1422.
 
-    * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is
 
-      MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091.
 
-    * Zeroize memory used for buffering or reassembling handshake messages
 
-      after use.
 
-    * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization
 
-      of sensitive data in the example programs aescrypt2 and crypt_and_hash.
 
-    * Change the default string format used for various X.509 DN attributes to
 
-      UTF8String. Previously, the use of the PrintableString format led to
 
-      wildcards and non-ASCII characters being unusable in some DN attributes.
 
-      Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by
 
-      Thomas-Dee.
 
-    * Fix compilation failure for configurations which use compile time
 
-      replacements of standard calloc/free functions through the macros
 
-      MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO.
 
-      Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706.
 
- Changes
 
-    * Removed support for Yotta as a build tool.
 
-    * Add tests for session resumption in DTLS.
 
-    * Close a test gap in (D)TLS between the client side and the server side:
 
-      test the handling of large packets and small packets on the client side
 
-      in the same way as on the server side.
 
-    * Change the dtls_client and dtls_server samples to work by default over
 
-      IPv6 and optionally by a build option over IPv4.
 
-    * Change the use of Windows threading to use Microsoft Visual C++ runtime
 
-      calls, rather than Win32 API calls directly. This is necessary to avoid
 
-      conflict with C runtime usage. Found and fixed by irwir.
 
-    * Remember the string format of X.509 DN attributes when replicating
 
-      X.509 DNs. Previously, DN attributes were always written in their default
 
-      string format (mostly PrintableString), which could lead to CRTs being
 
-      created which used PrintableStrings in the issuer field even though the
 
-      signing CA used UTF8Strings in its subject field; while X.509 compliant,
 
-      such CRTs were rejected in some applications, e.g. some versions of
 
-      Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by
 
-      Thomas-Dee.
 
-    * Improve documentation of mbedtls_ssl_get_verify_result().
 
-      Fixes #517 reported by github-monoculture.
 
-    * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and
 
-      use it to reduce error probability in RSA key generation to levels mandated
 
-      by FIPS-186-4.
 
- = mbed TLS 2.13.1 branch released 2018-09-06
 
- API Changes
 
-    * Extend the platform module with an abstraction mbedtls_platform_gmtime_r()
 
-      whose implementation should behave as a thread-safe version of gmtime().
 
-      This allows users to configure such an implementation at compile time when
 
-      the target system cannot be deduced automatically, by setting the option
 
-      MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to
 
-      automatically select implementations for Windows and POSIX C libraries.
 
- Bugfix
 
-    * Fix build failures on platforms where only gmtime() is available but
 
-      neither gmtime_r() nor gmtime_s() are present. Fixes #1907.
 
- = mbed TLS 2.13.0 branch released 2018-08-31
 
- Security
 
-    * Fix an issue in the X.509 module which could lead to a buffer overread
 
-      during certificate extensions parsing. In case of receiving malformed
 
-      input (extensions length field equal to 0), an illegal read of one byte
 
-      beyond the input buffer is made. Found and analyzed by Nathan Crandall.
 
- Features
 
-    * Add support for fragmentation of outgoing DTLS handshake messages. This
 
-      is controlled by the maximum fragment length as set locally or negotiated
 
-      with the peer, as well as by a new per-connection MTU option, set using
 
-      mbedtls_ssl_set_mtu().
 
-    * Add support for auto-adjustment of MTU to a safe value during the
 
-      handshake when flights do not get through (RFC 6347, section 4.1.1.1,
 
-      last paragraph).
 
-    * Add support for packing multiple records within a single datagram,
 
-      enabled by default.
 
-    * Add support for buffering out-of-order handshake messages in DTLS.
 
-      The maximum amount of RAM used for this can be controlled by the
 
-      compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined
 
-      in mbedtls/config.h.
 
- API Changes
 
-    * Add function mbedtls_ssl_set_datagram_packing() to configure
 
-      the use of datagram packing (enabled by default).
 
- Bugfix
 
-    * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation
 
-      failure in the function could lead to other buffers being leaked.
 
-    * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if
 
-      MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890
 
-    * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails.
 
-      Fix contributed by Espressif Systems.
 
-    * Add ecc extensions only if an ecc based ciphersuite is used.
 
-      This improves compliance to RFC 4492, and as a result, solves
 
-      interoperability issues with BouncyCastle. Raised by milenamil in #1157.
 
-    * Replace printf with mbedtls_printf in the ARIA module. Found by
 
-      TrinityTonic in #1908.
 
-    * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len()
 
-      and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941.
 
-    * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake
 
-      with TLS versions 1.1 and earlier when the server requested authentication
 
-      without providing a list of CAs. This was due to an overly strict bounds
 
-      check in parsing the CertificateRequest message,
 
-      introduced in Mbed TLS 2.12.0. Fixes #1954.
 
-    * Fix a miscalculation of the maximum record expansion in
 
-      mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites,
 
-      or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914.
 
-    * Fix undefined shifts with negative values in certificates parsing
 
-      (found by Catena cyber using oss-fuzz)
 
-    * Fix memory leak and free without initialization in pk_encrypt
 
-      and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128.
 
-    * Remove redundant else statement. Raised by irwir. Fixes #1776.
 
- Changes
 
-    * Copy headers preserving timestamps when doing a "make install".
 
-      Contributed by xueruini.
 
-    * Allow the forward declaration of public structs. Contributed by Dawid
 
-      Drozd. Fixes #1215 raised by randombit.
 
-    * Improve compatibility with some alternative CCM implementations by using
 
-      CCM test vectors from RAM.
 
-    * Add support for buffering of out-of-order handshake messages.
 
-    * Add warnings to the documentation of the HKDF module to reduce the risk
 
-      of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand()
 
-      functions. Fixes #1775. Reported by Brian J. Murray.
 
- = mbed TLS 2.12.0 branch released 2018-07-25
 
- Security
 
-    * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384,
 
-      in (D)TLS 1.0 to 1.2, that allowed an active network attacker to
 
-      partially recover the plaintext of messages under some conditions by
 
-      exploiting timing measurements. With DTLS, the attacker could perform
 
-      this recovery by sending many messages in the same connection. With TLS
 
-      or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only
 
-      worked if the same secret (for example a HTTP Cookie) has been repeatedly
 
-      sent over connections manipulated by the attacker. Connections using GCM
 
-      or CCM instead of CBC, using hash sizes other than SHA-384, or using
 
-      Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was
 
-      caused by a miscalculation (for SHA-384) in a countermeasure to the
 
-      original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi
 
-      Shamir.
 
-    * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to
 
-      1.2, that allowed a local attacker, able to execute code on the local
 
-      machine as well as manipulate network packets, to partially recover the
 
-      plaintext of messages under some conditions by using a cache attack
 
-      targeting an internal MD/SHA buffer. With TLS or if
 
-      mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if
 
-      the same secret (for example a HTTP Cookie) has been repeatedly sent over
 
-      connections manipulated by the attacker. Connections using GCM or CCM
 
-      instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected.
 
-      Found by Kenny Paterson, Eyal Ronen and Adi Shamir.
 
-    * Add a counter-measure against a vulnerability in TLS ciphersuites based
 
-      on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to
 
-      execute code on the local machine as well as manipulate network packets,
 
-      to partially recover the plaintext of messages under some conditions (see
 
-      previous entry) by using a cache attack targeting the SSL input record
 
-      buffer. Connections using GCM or CCM instead of CBC or using
 
-      Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson,
 
-      Eyal Ronen and Adi Shamir.
 
- Features
 
-    * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time
 
-      authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed
 
-      by Daniel King.
 
-    * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905.
 
-    * Add platform support for the Haiku OS. (https://www.haiku-os.org).
 
-      Contributed by Augustin Cavalier.
 
-    * Make the receive and transmit buffers independent sizes, for situations
 
-      where the outgoing buffer can be fixed at a smaller size than the incoming
 
-      buffer, which can save some RAM. If buffer lengths are kept equal, there
 
-      is no functional difference. Contributed by Angus Gratton, and also
 
-      independently contributed again by Paul Sokolovsky.
 
-    * Add support for key wrapping modes based on AES as defined by
 
-      NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649.
 
- Bugfix
 
-    * Fix the key_app_writer example which was writing a leading zero byte which
 
-      was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257.
 
-    * Fix compilation error on C++, because of a variable named new.
 
-      Found and fixed by Hirotaka Niisato in #1783.
 
-    * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix
 
-      contributed by tabascoeye.
 
-    * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid
 
-      return value. Found by @davidwu2000. #839
 
-    * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber,
 
-      Philippe Antoine. Fixes #1623.
 
-    * Remove unused headers included in x509.c. Found by Chris Hanson and fixed
 
-      by Brendan Shanks. Part of a fix for #992.
 
-    * Fix compilation error when MBEDTLS_ARC4_C is disabled and
 
-      MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719.
 
-    * Added length checks to some TLS parsing functions. Found and fixed by
 
-      Philippe Antoine from Catena cyber. #1663.
 
-    * Fix the inline assembly for the MPI multiply helper function for i386 and
 
-      i386 with SSE2. Found by László Langó. Fixes #1550
 
-    * Fix namespacing in header files. Remove the `mbedtls` namespacing in
 
-      the `#include` in the header files. Resolves #857
 
-    * Fix compiler warning of 'use before initialisation' in
 
-      mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid
 
-      Drozd. #1098
 
-    * Fix decryption for zero length messages (which contain all padding) when a
 
-      CBC based ciphersuite is used together with Encrypt-then-MAC. Previously,
 
-      such a message was wrongly reported as an invalid record and therefore lead
 
-      to the connection being terminated. Seen most often with OpenSSL using
 
-      TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix
 
-      contributed by Espressif Systems. Fixes #1632
 
-    * Fix ssl_client2 example to send application data with 0-length content
 
-      when the request_size argument is set to 0 as stated in the documentation.
 
-      Fixes #1833.
 
-    * Correct the documentation for `mbedtls_ssl_get_session()`. This API has
 
-      deep copy of the session, and the peer certificate is not lost. Fixes #926.
 
-    * Fix build using -std=c99. Fixed by Nick Wilson.
 
- Changes
 
-    * Fail when receiving a TLS alert message with an invalid length, or invalid
 
-      zero-length messages when using TLS 1.2. Contributed by Espressif Systems.
 
-    * Change the default behaviour of mbedtls_hkdf_extract() to return an error
 
-      when calling with a NULL salt and non-zero salt_len. Contributed by
 
-      Brian J Murray
 
-    * Change the shebang line in Perl scripts to look up perl in the PATH.
 
-      Contributed by fbrosson.
 
-    * Allow overriding the time on Windows via the platform-time abstraction.
 
-      Fixed by Nick Wilson.
 
-    * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson.
 
- = mbed TLS 2.11.0 branch released 2018-06-18
 
- Features
 
-    * Add additional block mode, OFB (Output Feedback), to the AES module and
 
-      cipher abstraction module.
 
-    * Implement the HMAC-based extract-and-expand key derivation function
 
-      (HKDF) per RFC 5869. Contributed by Thomas Fossati.
 
-    * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4.
 
-    * Add support for the XTS block cipher mode with AES (AES-XTS).
 
-      Contributed by Aorimn in pull request #414.
 
-    * In TLS servers, support offloading private key operations to an external
 
-      cryptoprocessor. Private key operations can be asynchronous to allow
 
-      non-blocking operation of the TLS server stack.
 
- Bugfix
 
-    * Fix the cert_write example to handle certificates signed with elliptic
 
-      curves as well as RSA. Fixes #777 found by dbedev.
 
-    * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition
 
-      used by user applications. Found and fixed by Fabio Alessandrelli.
 
-    * Fix compilation warnings with IAR toolchain, on 32 bit platform.
 
-      Reported by rahmanih in #683
 
-    * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552.
 
- Changes
 
-    * Changed CMake defaults for IAR to treat all compiler warnings as errors.
 
-    * Changed the Clang parameters used in the CMake build files to work for
 
-      versions later than 3.6. Versions of Clang earlier than this may no longer
 
-      work. Fixes #1072
 
- = mbed TLS 2.10.0 branch released 2018-06-06
 
- Features
 
-    * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites
 
-      (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h
 
- API Changes
 
-    * Extend the platform module with a util component that contains
 
-      functionality shared by multiple Mbed TLS modules. At this stage
 
-      platform_util.h (and its associated platform_util.c) only contain
 
-      mbedtls_platform_zeroize(), which is a critical function from a security
 
-      point of view. mbedtls_platform_zeroize() needs to be regularly tested
 
-      against compilers to ensure that calls to it are not removed from the
 
-      output binary as part of redundant code elimination optimizations.
 
-      Therefore, mbedtls_platform_zeroize() is moved to the platform module to
 
-      facilitate testing and maintenance.
 
- Bugfix
 
-    * Fix an issue with MicroBlaze support in bn_mul.h which was causing the
 
-      build to fail. Found by zv-io. Fixes #1651.
 
- Changes
 
-    * Support TLS testing in out-of-source builds using cmake. Fixes #1193.
 
-    * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by
 
-      TrinityTonic. #1359.
 
- = mbed TLS 2.9.0 branch released 2018-04-30
 
- Security
 
-    * Fix an issue in the X.509 module which could lead to a buffer overread
 
-      during certificate validation. Additionally, the issue could also lead to
 
-      unnecessary callback checks being made or to some validation checks to be
 
-      omitted. The overread could be triggered remotely, while the other issues
 
-      would require a non DER-compliant certificate to be correctly signed by a
 
-      trusted CA, or a trusted CA with a non DER-compliant certificate. Found by
 
-      luocm. Fixes #825.
 
-    * Fix the buffer length assertion in the ssl_parse_certificate_request()
 
-      function which led to an arbitrary overread of the message buffer. The
 
-      overreads could be caused by receiving a malformed message at the point
 
-      where an optional signature algorithms list is expected when the signature
 
-      algorithms section is too short. In builds with debug output, the overread
 
-      data is output with the debug data.
 
-    * Fix a client-side bug in the validation of the server's ciphersuite choice
 
-      which could potentially lead to the client accepting a ciphersuite it didn't
 
-      offer or a ciphersuite that cannot be used with the TLS or DTLS version
 
-      chosen by the server. This could lead to corruption of internal data
 
-      structures for some configurations.
 
- Features
 
-    * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES
 
-      tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB.
 
-      Suggested and contributed by jkivilin in pull request #394.
 
-    * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and
 
-      ECDH primitive functions (mbedtls_ecdh_gen_public(),
 
-      mbedtls_ecdh_compute_shared()) are supported for now. Contributed by
 
-      Nicholas Wilson in pull request #348.
 
- API Changes
 
-    * Extend the public API with the function of mbedtls_net_poll() to allow user
 
-      applications to wait for a network context to become ready before reading
 
-      or writing.
 
-    * Add function mbedtls_ssl_check_pending() to the public API to allow
 
-      a check for whether more more data is pending to be processed in the
 
-      internal message buffers.
 
-      This function is necessary to determine when it is safe to idle on the
 
-      underlying transport in case event-driven IO is used.
 
- Bugfix
 
-    * Fix a spurious uninitialized variable warning in cmac.c. Fix independently
 
-      contributed by Brian J Murray and David Brown.
 
-    * Add missing dependencies in test suites that led to build failures
 
-      in configurations that omit certain hashes or public-key algorithms.
 
-      Fixes #1040.
 
-    * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks.
 
-      #1353
 
-    * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and
 
-      MBEDTLS_VERSION_FEATURES in some test suites. Contributed by
 
-      Deomid Ryabkov. Fixes #1299, #1475.
 
-    * Fix the Makefile build process for building shared libraries on Mac OS X.
 
-      Fixed by mnacamura.
 
-    * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was
 
-      unable to parse keys which had only the optional parameters field of the
 
-      ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379.
 
-    * Return the plaintext data more quickly on unpadded CBC decryption, as
 
-      stated in the mbedtls_cipher_update() documentation. Contributed by
 
-      Andy Leiserson.
 
-    * Fix overriding and ignoring return values when parsing and writing to
 
-      a file in pk_sign program. Found by kevlut in #1142.
 
-    * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations
 
-      where data needs to be fetched from the underlying transport in order
 
-      to make progress. Previously, this error code was also occasionally
 
-      returned when unexpected messages were being discarded, ignoring that
 
-      further messages could potentially already be pending to be processed
 
-      in the internal buffers; these cases led to deadlocks when event-driven
 
-      I/O was used. Found and reported by Hubert Mis in #772.
 
-    * Fix buffer length assertions in the ssl_parse_certificate_request()
 
-      function which leads to a potential one byte overread of the message
 
-      buffer.
 
-    * Fix invalid buffer sizes passed to zlib during record compression and
 
-      decompression.
 
-    * Fix the soversion of libmbedcrypto to match the soversion of the
 
-      maintained 2.7 branch. The soversion was increased in Mbed TLS
 
-      version 2.7.1 to reflect breaking changes in that release, but the
 
-      increment was missed in 2.8.0 and later releases outside of the 2.7 branch.
 
- Changes
 
-    * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub.
 
-    * Support cmake builds where Mbed TLS is a subproject. Fix contributed
 
-      independently by Matthieu Volat and Arne Schwabe.
 
-    * Improve testing in configurations that omit certain hashes or
 
-      public-key algorithms. Includes contributions by Gert van Dijk.
 
-    * Improve negative testing of X.509 parsing.
 
-    * Do not define global mutexes around readdir() and gmtime() in
 
-      configurations where the feature is disabled. Found and fixed by Gergely
 
-      Budai.
 
-    * Harden the function mbedtls_ssl_config_free() against misuse, so that it
 
-      doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and
 
-      instead incorrectly manipulates the configuration structure directly.
 
-      Found and fix submitted by junyeonLEE in #1220.
 
-    * Provide an empty implementation of mbedtls_pkcs5_pbes2() when
 
-      MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2
 
-      without PBES2. Fixed by Marcos Del Sol Vives.
 
-    * Add the order of the base point as N in the mbedtls_ecp_group structure
 
-      for Curve25519 (other curves had it already). Contributed by Nicholas
 
-      Wilson #481
 
-    * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan
 
-      Krylov.
 
-    * Improve the documentation of mbedtls_ssl_write(). Suggested by
 
-      Paul Sokolovsky in #1356.
 
-    * Add an option in the Makefile to support ar utilities where the operation
 
-      letter must not be prefixed by '-', such as LLVM. Found and fixed by
 
-      Alex Hixon.
 
-    * Allow configuring the shared library extension by setting the DLEXT
 
-      environment variable when using the project makefiles.
 
-    * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution
 
-      by Alexey Skalozub in #405.
 
-    * In the SSL module, when f_send, f_recv or f_recv_timeout report
 
-      transmitting more than the required length, return an error. Raised by
 
-      Sam O'Connor in #1245.
 
-    * Improve robustness of mbedtls_ssl_derive_keys against the use of
 
-      HMAC functions with non-HMAC ciphersuites. Independently contributed
 
-      by Jiayuan Chen in #1377. Fixes #1437.
 
-    * Improve security of RSA key generation by including criteria from
 
-      FIPS 186-4. Contributed by Jethro Beekman. #1380
 
-    * Declare functions in header files even when an alternative implementation
 
-      of the corresponding module is activated by defining the corresponding
 
-      MBEDTLS_XXX_ALT macro. This means that alternative implementations do
 
-      not need to copy the declarations, and ensures that they will have the
 
-      same API.
 
-    * Add platform setup and teardown calls in test suites.
 
- = mbed TLS 2.8.0 branch released 2018-03-16
 
- Default behavior changes
 
-    * The truncated HMAC extension now conforms to RFC 6066. This means
 
-      that when both sides of a TLS connection negotiate the truncated
 
-      HMAC extension, Mbed TLS can now interoperate with other
 
-      compliant implementations, but this breaks interoperability with
 
-      prior versions of Mbed TLS. To restore the old behavior, enable
 
-      the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in
 
-      config.h. Found by Andreas Walz (ivESK, Offenburg University of
 
-      Applied Sciences).
 
- Security
 
-    * Fix implementation of the truncated HMAC extension. The previous
 
-      implementation allowed an offline 2^80 brute force attack on the
 
-      HMAC key of a single, uninterrupted connection (with no
 
-      resumption of the session).
 
-    * Verify results of RSA private key operations to defend
 
-      against Bellcore glitch attack.
 
-    * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause
 
-      a crash on invalid input.
 
-    * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a
 
-      crash on invalid input.
 
-    * Fix CRL parsing to reject CRLs containing unsupported critical
 
-      extensions. Found by Falko Strenzke and Evangelos Karatsiolis.
 
- Features
 
-    * Extend PKCS#8 interface by introducing support for the entire SHA
 
-      algorithms family when encrypting private keys using PKCS#5 v2.0.
 
-      This allows reading encrypted PEM files produced by software that
 
-      uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli,
 
-      OpenVPN Inc. Fixes #1339
 
-    * Add support for public keys encoded in PKCS#1 format. #1122
 
- New deprecations
 
-    * Deprecate support for record compression (configuration option
 
-      MBEDTLS_ZLIB_SUPPORT).
 
- Bugfix
 
-    * Fix the name of a DHE parameter that was accidentally changed in 2.7.0.
 
-      Fixes #1358.
 
-    * Fix test_suite_pk to work on 64-bit ILP32 systems. #849
 
-    * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates
 
-      with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct.
 
-      In the context of SSL, this resulted in handshake failure. Reported by
 
-      daniel in the Mbed TLS forum. #1351
 
-    * Fix Windows x64 builds with the included mbedTLS.sln file. #1347
 
-    * Fix setting version TLSv1 as minimal version, even if TLS 1
 
-      is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION
 
-      and MBEDTLS_SSL_MIN_MINOR_VERSION instead of
 
-      MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664
 
-    * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE
 
-      only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and
 
-      Nick Wilson on issue #355
 
-    * In test_suite_pk, pass valid parameters when testing for hash length
 
-      overflow. #1179
 
-    * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found
 
-      by Guido Vranken. #639
 
-    * Log correct number of ciphersuites used in Client Hello message. #918
 
-    * Fix X509 CRT parsing that would potentially accept an invalid tag when
 
-      parsing the subject alternative names.
 
-    * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange()
 
-      that could cause a key exchange to fail on valid data.
 
-    * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that
 
-      could cause a key exchange to fail on valid data.
 
-    * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under
 
-      MBEDTLS_DEPRECATED_REMOVED. #1388
 
-    * Fix a 1-byte heap buffer overflow (read-only) during private key parsing.
 
-      Found through fuzz testing.
 
- Changes
 
-    * Fix tag lengths and value ranges in the documentation of CCM encryption.
 
-      Contributed by Mathieu Briand.
 
-    * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky.
 
-    * Remove support for the library reference configuration for picocoin.
 
-    * MD functions deprecated in 2.7.0 are no longer inline, to provide
 
-      a migration path for those depending on the library's ABI.
 
-    * Clarify the documentation of mbedtls_ssl_setup.
 
-    * Use (void) when defining functions with no parameters. Contributed by
 
-      Joris Aerts. #678
 
- = mbed TLS 2.7.0 branch released 2018-02-03
 
- Security
 
-    * Fix a heap corruption issue in the implementation of the truncated HMAC
 
-      extension. When the truncated HMAC extension is enabled and CBC is used,
 
-      sending a malicious application packet could be used to selectively corrupt
 
-      6 bytes on the peer's heap, which could potentially lead to crash or remote
 
-      code execution. The issue could be triggered remotely from either side in
 
-      both TLS and DTLS. CVE-2018-0488
 
-    * Fix a buffer overflow in RSA-PSS verification when the hash was too large
 
-      for the key size, which could potentially lead to crash or remote code
 
-      execution. Found by Seth Terashima, Qualcomm Product Security Initiative,
 
-      Qualcomm Technologies Inc. CVE-2018-0487
 
-    * Fix buffer overflow in RSA-PSS verification when the unmasked data is all
 
-      zeros.
 
-    * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding
 
-      64 KiB to the address of the SSL buffer and causing a wrap around.
 
-    * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by
 
-      default enabled) maximum fragment length extension is disabled in the
 
-      config and the application data buffer passed to mbedtls_ssl_write
 
-      is larger than the internal message buffer (16384 bytes by default), the
 
-      latter overflows. The exploitability of this issue depends on whether the
 
-      application layer can be forced into sending such large packets. The issue
 
-      was independently reported by Tim Nordell via e-mail and by Florin Petriuc
 
-      and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022.
 
-      Fixes #707.
 
-    * Add a provision to prevent compiler optimizations breaking the time
 
-      constancy of mbedtls_ssl_safer_memcmp().
 
-    * Ensure that buffers are cleared after use if they contain sensitive data.
 
-      Changes were introduced in multiple places in the library.
 
-    * Set PEM buffer to zero before freeing it, to avoid decoded private keys
 
-      being leaked to memory after release.
 
-    * Fix dhm_check_range() failing to detect trivial subgroups and potentially
 
-      leaking 1 bit of the private key. Reported by prashantkspatil.
 
-    * Make mbedtls_mpi_read_binary() constant-time with respect to the input
 
-      data. Previously, trailing zero bytes were detected and omitted for the
 
-      sake of saving memory, but potentially leading to slight timing
 
-      differences. Reported by Marco Macchetti, Kudelski Group.
 
-    * Wipe stack buffer temporarily holding EC private exponent
 
-      after keypair generation.
 
-    * Fix a potential heap buffer over-read in ALPN extension parsing
 
-      (server-side). Could result in application crash, but only if an ALPN
 
-      name larger than 16 bytes had been configured on the server.
 
-    * Change default choice of DHE parameters from untrustworthy RFC 5114
 
-      to RFC 3526 containing parameters generated in a nothing-up-my-sleeve
 
-      manner.
 
- Features
 
-    * Allow comments in test data files.
 
-    * The selftest program can execute a subset of the tests based on command
 
-      line arguments.
 
-    * New unit tests for timing. Improve the self-test to be more robust
 
-      when run on a heavily-loaded machine.
 
-    * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT,
 
-      MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs.
 
-    * Add support for alternative implementations of GCM, selected by the
 
-      configuration flag MBEDTLS_GCM_ALT.
 
-    * Add support for alternative implementations for ECDSA, controlled by new
 
-      configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and
 
-      MBEDTLS_ECDSDA_GENKEY_AT in config.h.
 
-      The following functions from the ECDSA module can be replaced
 
-      with alternative implementation:
 
-      mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey().
 
-    * Add support for alternative implementation of ECDH, controlled by the
 
-      new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and
 
-      MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h.
 
-      The following functions from the ECDH module can be replaced
 
-      with an alternative implementation:
 
-      mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared().
 
-    * Add support for alternative implementation of ECJPAKE, controlled by
 
-      the new configuration flag MBEDTLS_ECJPAKE_ALT.
 
-    * Add mechanism to provide alternative implementation of the DHM module.
 
- API Changes
 
-    * Extend RSA interface by multiple functions allowing structure-
 
-      independent setup and export of RSA contexts. Most notably,
 
-      mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting
 
-      up RSA contexts from partial key material and having them completed to the
 
-      needs of the implementation automatically. This allows to setup private RSA
 
-      contexts from keys consisting of N,D,E only, even if P,Q are needed for the
 
-      purpose or CRT and/or blinding.
 
-    * The configuration option MBEDTLS_RSA_ALT can be used to define alternative
 
-      implementations of the RSA interface declared in rsa.h.
 
-    * The following functions in the message digest modules (MD2, MD4, MD5,
 
-      SHA1, SHA256, SHA512) have been deprecated and replaced as shown below.
 
-      The new functions change the return type from void to int to allow
 
-      returning error codes when using MBEDTLS_<MODULE>_ALT.
 
-      mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret()
 
-      mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret()
 
-      mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret()
 
-      mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process()
 
- New deprecations
 
-    * Deprecate usage of RSA primitives with non-matching key-type
 
-      (e.g. signing with a public key).
 
-    * Direct manipulation of structure fields of RSA contexts is deprecated.
 
-      Users are advised to use the extended RSA API instead.
 
-    * Deprecate usage of message digest functions that return void
 
-      (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update,
 
-      mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is
 
-      any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions
 
-      that can return an error code.
 
-    * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by
 
-      parameters from RFC 3526 or the newly added parameters from RFC 7919.
 
-    * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc.
 
-      Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN
 
-      etc.
 
-    * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters
 
-      from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin()
 
-      accepting DHM parameters in binary form, matching the new constants.
 
- Bugfix
 
-    * Fix ssl_parse_record_header() to silently discard invalid DTLS records
 
-      as recommended in RFC 6347 Section 4.1.2.7.
 
-    * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times.
 
-      Found by projectgus and Jethro Beekman, #836.
 
-    * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin.
 
-    * Parse signature algorithm extension when renegotiating. Previously,
 
-      renegotiated handshakes would only accept signatures using SHA-1
 
-      regardless of the peer's preferences, or fail if SHA-1 was disabled.
 
-    * Fix leap year calculation in x509_date_is_valid() to ensure that invalid
 
-      dates on leap years with 100 and 400 intervals are handled correctly. Found
 
-      by Nicholas Wilson. #694
 
-    * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were
 
-      accepted. Generating these signatures required the private key.
 
-    * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys.
 
-      Found independently by Florian in the mbed TLS forum and by Mishamax.
 
-      #878, #1019.
 
-    * Fix variable used before assignment compilation warnings with IAR
 
-      toolchain. Found by gkerrien38.
 
-    * Fix unchecked return codes from AES, DES and 3DES functions in
 
-      pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively.
 
-      If a call to one of the functions of the cryptographic primitive modules
 
-      failed, the error may not be noticed by the function
 
-      mbedtls_pem_read_buffer() causing it to return invalid values. Found by
 
-      Guido Vranken. #756
 
-    * Include configuration file in md.h, to fix compilation warnings.
 
-      Reported by aaronmdjones in #1001
 
-    * Correct extraction of signature-type from PK instance in X.509 CRT and CSR
 
-      writing routines that prevented these functions to work with alternative
 
-      RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011.
 
-    * Don't print X.509 version tag for v1 CRT's, and omit extensions for
 
-      non-v3 CRT's.
 
-    * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024
 
-    * Fix net_would_block() to avoid modification by errno through fcntl() call.
 
-      Found by nkolban. Fixes #845.
 
-    * Fix handling of handshake messages in mbedtls_ssl_read() in case
 
-      MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp.
 
-    * Add a check for invalid private parameters in mbedtls_ecdsa_sign().
 
-      Reported by Yolan Romailler.
 
-    * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64.
 
-    * Fix incorrect unit in benchmark output. #850
 
-    * Add size-checks for record and handshake message content, securing
 
-      fragile yet non-exploitable code-paths.
 
-    * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by
 
-      MilenkoMitrovic, #1104
 
-    * Fix mbedtls_timing_alarm(0) on Unix and MinGW.
 
-    * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1.
 
-    * Fix possible memory leaks in mbedtls_gcm_self_test().
 
-    * Added missing return code checks in mbedtls_aes_self_test().
 
-    * Fix issues in RSA key generation program programs/x509/rsa_genkey and the
 
-      RSA test suite where the failure of CTR DRBG initialization lead to
 
-      freeing an RSA context and several MPI's without proper initialization
 
-      beforehand.
 
-    * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue.
 
-    * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c.
 
-      Found and fixed by Martijn de Milliano.
 
-    * Fix an issue in the cipher decryption with the mode
 
-      MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding.
 
-      Note, this padding mode is not used by the TLS protocol. Found and fixed by
 
-      Micha Kraus.
 
-    * Fix the entropy.c module to not call mbedtls_sha256_starts() or
 
-      mbedtls_sha512_starts() in the mbedtls_entropy_init() function.
 
-    * Fix the entropy.c module to ensure that mbedtls_sha256_init() or
 
-      mbedtls_sha512_init() is called before operating on the relevant context
 
-      structure. Do not assume that zeroizing a context is a correct way to
 
-      reset it. Found independently by ccli8 on Github.
 
-    * In mbedtls_entropy_free(), properly free the message digest context.
 
-    * Fix status handshake status message in programs/ssl/dtls_client.c. Found
 
-      and fixed by muddog.
 
- Changes
 
-    * Extend cert_write example program by options to set the certificate version
 
-      and the message digest. Further, allow enabling/disabling of authority
 
-      identifier, subject identifier and basic constraints extensions.
 
-    * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In
 
-      particular, don't require P,Q if neither CRT nor blinding are
 
-      used. Reported and fix proposed independently by satur9nine and sliai
 
-      on GitHub.
 
-    * Only run AES-192 self-test if AES-192 is available. Fixes #963.
 
-    * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the
 
-      undeclared dependency of the RSA module on the ASN.1 module.
 
-    * Update all internal usage of deprecated message digest functions to the
 
-      new ones with return codes. In particular, this modifies the
 
-      mbedtls_md_info_t structure. Propagate errors from these functions
 
-      everywhere except some locations in the ssl_tls.c module.
 
-    * Improve CTR_DRBG error handling by propagating underlying AES errors.
 
-    * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography
 
-      modules where the software implementation can be replaced by a hardware
 
-      implementation.
 
-    * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4
 
-      throughout the library.
 
- = mbed TLS 2.6.0 branch released 2017-08-10
 
- Security
 
-    * Fix authentication bypass in SSL/TLS: when authmode is set to optional,
 
-      mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's
 
-      X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA
 
-      (default: 8) intermediates, even when it was not trusted. This could be
 
-      triggered remotely from either side. (With authmode set to 'required'
 
-      (the default), the handshake was correctly aborted).
 
-    * Reliably wipe sensitive data after use in the AES example applications
 
-      programs/aes/aescrypt2 and programs/aes/crypt_and_hash.
 
-      Found by Laurent Simon.
 
- Features
 
-    * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown()
 
-      and the context struct mbedtls_platform_context to perform
 
-      platform-specific setup and teardown operations. The macro
 
-      MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden
 
-      by the user in a platform_alt.h file. These new functions are required in
 
-      some embedded environments to provide a means of initialising underlying
 
-      cryptographic acceleration hardware.
 
- API Changes
 
-    * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the
 
-      API consistent with mbed TLS 2.5.0. Specifically removed the inline
 
-      qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt,
 
-      mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found
 
-      by James Cowgill. #978
 
-    * Certificate verification functions now set flags to -1 in case the full
 
-      chain was not verified due to an internal error (including in the verify
 
-      callback) or chain length limitations.
 
-    * With authmode set to optional, the TLS handshake is now aborted if the
 
-      verification of the peer's certificate failed due to an overlong chain or
 
-      a fatal error in the verify callback.
 
- Bugfix
 
-    * Add a check if iv_len is zero in GCM, and return an error if it is zero.
 
-      Reported by roberto. #716
 
-    * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD)
 
-      to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will
 
-      always be implemented by pthread support. #696
 
-    * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(),
 
-      in the case of an error. Found by redplait. #590
 
-    * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random.
 
-      Reported and fix suggested by guidovranken. #740
 
-    * Fix conditional preprocessor directives in bignum.h to enable 64-bit
 
-      compilation when using ARM Compiler 6.
 
-    * Fix a potential integer overflow in the version verification for DER
 
-      encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs
 
-      to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
 
-      KNOX Security, Samsung Research America
 
-    * Fix potential integer overflow in the version verification for DER
 
-      encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs
 
-      to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
 
-      KNOX Security, Samsung Research America
 
-    * Fix a potential integer overflow in the version verification for DER
 
-      encoded X.509 certificates. The overflow could enable maliciously
 
-      constructed certificates to bypass the certificate verification check.
 
-    * Fix a call to the libc function time() to call the platform abstraction
 
-      function mbedtls_time() instead. Found by wairua. #666
 
-    * Avoid shadowing of time and index functions through mbed TLS function
 
-      arguments. Found by inestlerode. #557.
 
- Changes
 
-    * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of
 
-      64-bit division. This is useful on embedded platforms where 64-bit division
 
-      created a dependency on external libraries. #708
 
-    * Removed mutexes from ECP hardware accelerator code. Now all hardware
 
-      accelerator code in the library leaves concurrency handling to the
 
-      platform. Reported by Steven Cooreman. #863
 
-    * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file
 
-      config-no-entropy.h to reduce the RAM footprint.
 
-    * Added a test script that can be hooked into git that verifies commits
 
-      before they are pushed.
 
-    * Improve documentation of PKCS1 decryption functions.
 
- = mbed TLS 2.5.1 released 2017-06-21
 
- Security
 
-    * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read().
 
-      The issue could only happen client-side with renegotiation enabled.
 
-      Could result in DoS (application crash) or information leak
 
-      (if the application layer sent data read from mbedtls_ssl_read()
 
-      back to the server or to a third party). Can be triggered remotely.
 
-    * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for
 
-      certificate verification. SHA-1 can be turned back on with a compile-time
 
-      option if needed.
 
-    * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to
 
-      detect it sometimes. Reported by Hugo Leisink. #810
 
-    * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a
 
-      potential Bleichenbacher/BERserk-style attack.
 
- Bugfix
 
-    * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not
 
-      valid C and they prevented the test from compiling in Visual Studio 2015
 
-      and with GCC using the -Wpedantic compilation option.
 
-    * Fix insufficient support for signature-hash-algorithm extension,
 
-      resulting in compatibility problems with Chrome. Found by hfloyrd. #823
 
-    * Fix behaviour that hid the original cause of fatal alerts in some cases
 
-      when sending the alert failed. The fix makes sure not to hide the error
 
-      that triggered the alert.
 
-    * Fix SSLv3 renegotiation behaviour and stop processing data received from
 
-      peer after sending a fatal alert to refuse a renegotiation attempt.
 
-      Previous behaviour was to keep processing data even after the alert has
 
-      been sent.
 
-    * Accept empty trusted CA chain in authentication mode
 
-      MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864
 
-    * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate
 
-      fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to
 
-      reflect bad EC curves within verification result.
 
-    * Fix bug that caused the modular inversion function to accept the invalid
 
-      modulus 1 and therefore to hang. Found by blaufish. #641.
 
-    * Fix incorrect sign computation in modular exponentiation when the base is
 
-      a negative MPI. Previously the result was always negative. Found by Guido
 
-      Vranken.
 
-    * Fix a numerical underflow leading to stack overflow in mpi_read_file()
 
-      that was triggered uppon reading an empty line. Found by Guido Vranken.
 
- Changes
 
-    * Send fatal alerts in more cases. The previous behaviour was to skip
 
-      sending the fatal alert and just drop the connection.
 
-    * Clarify ECDSA documentation and improve the sample code to avoid
 
-      misunderstanding and potentially dangerous use of the API. Pointed out
 
-      by Jean-Philippe Aumasson.
 
- = mbed TLS 2.5.0 branch released 2017-05-17
 
- Security
 
-    * Wipe stack buffers in RSA private key operations
 
-      (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent
 
-      Simon.
 
-    * Add exponent blinding to RSA private operations as a countermeasure
 
-      against side-channel attacks like the cache attack described in
 
-      https://arxiv.org/abs/1702.08719v2.
 
-      Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss,
 
-      Clémentine Maurice and Stefan Mangard.
 
- Features
 
-    * Add hardware acceleration support for the Elliptic Curve Point module.
 
-      This involved exposing parts of the internal interface to enable
 
-      replacing the core functions and adding and alternative, module level
 
-      replacement support for enabling the extension of the interface.
 
-    * Add a new configuration option to 'mbedtls_ssl_config' to enable
 
-      suppressing the CA list in Certificate Request messages. The default
 
-      behaviour has not changed, namely every configured CAs name is included.
 
- API Changes
 
-    * The following functions in the AES module have been deprecated and replaced
 
-      by the functions shown below. The new functions change the return type from
 
-      void to int to allow returning error codes when using MBEDTLS_AES_ALT,
 
-      MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT.
 
-      mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt()
 
-      mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt()
 
- Bugfix
 
-    * Remove macros from compat-1.3.h that correspond to deleted items from most
 
-      recent versions of the library. Found by Kyle Keen.
 
-    * Fixed issue in the Threading module that prevented mutexes from
 
-      initialising. Found by sznaider. #667 #843
 
-    * Add checks in the PK module for the RSA functions on 64-bit systems.
 
-      The PK and RSA modules use different types for passing hash length and
 
-      without these checks the type cast could lead to data loss. Found by Guido
 
-      Vranken.
 
- = mbed TLS 2.4.2 branch released 2017-03-08
 
- Security
 
-    * Add checks to prevent signature forgeries for very large messages while
 
-      using RSA through the PK module in 64-bit systems. The issue was caused by
 
-      some data loss when casting a size_t to an unsigned int value in the
 
-      functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and
 
-      mbedtls_pk_sign(). Found by Jean-Philippe Aumasson.
 
-    * Fixed potential livelock during the parsing of a CRL in PEM format in
 
-      mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing
 
-      characters after the footer could result in the execution of an infinite
 
-      loop. The issue can be triggered remotely. Found by Greg Zaverucha,
 
-      Microsoft.
 
-    * Removed MD5 from the allowed hash algorithms for CertificateRequest and
 
-      CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2.
 
-      Introduced by interoperability fix for #513.
 
-    * Fixed a bug that caused freeing a buffer that was allocated on the stack,
 
-      when verifying the validity of a key on secp224k1. This could be
 
-      triggered remotely for example with a maliciously constructed certificate
 
-      and potentially could lead to remote code execution on some platforms.
 
-      Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos
 
-      team. #569 CVE-2017-2784
 
- Bugfix
 
-    * Fix output certificate verification flags set by x509_crt_verify_top() when
 
-      traversing a chain of trusted CA. The issue would cause both flags,
 
-      MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be
 
-      set when the verification conditions are not met regardless of the cause.
 
-      Found by Harm Verhagen and inestlerode. #665 #561
 
-    * Fix the redefinition of macro ssl_set_bio to an undefined symbol
 
-      mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it.
 
-      Found by omlib-lin. #673
 
-    * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and
 
-      x509_csr.c that are reported when building mbed TLS with a config.h that
 
-      does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562
 
-    * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that
 
-      would compare 64 bits of the record counter instead of 48 bits as indicated
 
-      in RFC 6347 Section 4.3.1. This could cause the execution of the
 
-      renegotiation routines at unexpected times when the protocol is DTLS. Found
 
-      by wariua. #687
 
-    * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing
 
-      the input string in PEM format to extract the different components. Found
 
-      by Eyal Itkin.
 
-    * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could
 
-      cause buffer bound checks to be bypassed. Found by Eyal Itkin.
 
-    * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could
 
-      cause buffer bound checks to be bypassed. Found by Eyal Itkin.
 
-    * Fixed potential arithmetic overflow in mbedtls_md2_update() that could
 
-      cause buffer bound checks to be bypassed. Found by Eyal Itkin.
 
-    * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could
 
-      cause buffer bound checks to be bypassed. Found by Eyal Itkin.
 
-    * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng
 
-      Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America.
 
-    * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused
 
-      by missing calls to mbedtls_pem_free() in cases when a
 
-      MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and
 
-      fix proposed by Guido Vranken. #722
 
-    * Fixed the templates used to generate project and solution files for Visual
 
-      Studio 2015 as well as the files themselves, to remove a build warning
 
-      generated in Visual Studio 2015. Reported by Steve Valliere. #742
 
-    * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C.
 
-      Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771
 
-    * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI
 
-      number to write in hexadecimal is negative and requires an odd number of
 
-      digits. Found and fixed by Guido Vranken.
 
-    * Fix unlisted DES configuration dependency in some pkparse test cases. Found
 
-      by inestlerode. #555
 
- = mbed TLS 2.4.1 branch released 2016-12-13
 
- Changes
 
-    * Update to CMAC test data, taken from - NIST Special Publication 800-38B -
 
-      Recommendation for Block Cipher Modes of Operation: The CMAC Mode for
 
-      Authentication – October  2016
 
- = mbed TLS 2.4.0 branch released 2016-10-17
 
- Security
 
-    * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant
 
-      with RFC-5116 and could lead to session key recovery in very long TLS
 
-      sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in
 
-      TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic.
 
-      https://eprint.iacr.org/2016/475.pdf
 
-    * Fixed potential stack corruption in mbedtls_x509write_crt_der() and
 
-      mbedtls_x509write_csr_der() when the signature is copied to the buffer
 
-      without checking whether there is enough space in the destination. The
 
-      issue cannot be triggered remotely. Found by Jethro Beekman.
 
- Features
 
-    * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by
 
-      NIST SP 800-38B, RFC-4493 and RFC-4615.
 
-    * Added hardware entropy selftest to verify that the hardware entropy source
 
-      is functioning correctly.
 
-    * Added a script to print build environment info for diagnostic use in test
 
-      scripts, which is also now called by all.sh.
 
-    * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to
 
-      configure the maximum length of a file path that can be buffered when
 
-      calling mbedtls_x509_crt_parse_path().
 
-    * Added a configuration file config-no-entropy.h that configures the subset of
 
-      library features that do not require an entropy source.
 
-    * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users
 
-      to configure the minimum number of bytes for entropy sources using the
 
-      mbedtls_hardware_poll() function.
 
- Bugfix
 
-    * Fix for platform time abstraction to avoid dependency issues where a build
 
-      may need time but not the standard C library abstraction, and added
 
-      configuration consistency checks to check_config.h
 
-    * Fix dependency issue in Makefile to allow parallel builds.
 
-    * Fix incorrect handling of block lengths in crypt_and_hash.c sample program,
 
-      when GCM is used. Found by udf2457. #441
 
-    * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
 
-      enabled unless others were also present. Found by David Fernandez. #428
 
-    * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on
 
-      a contribution from Tobias Tangemann. #541
 
-    * Fixed cert_app.c sample program for debug output and for use when no root
 
-      certificates are provided.
 
-    * Fix conditional statement that would cause a 1 byte overread in
 
-      mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599
 
-    * Fixed pthread implementation to avoid unintended double initialisations
 
-      and double frees. Found by Niklas Amnebratt.
 
-    * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for
 
-      builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found
 
-      by inestlerode. #559.
 
-    * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf
 
-      data structure until after error checks are successful. Found by
 
-      subramanyam-c. #622
 
-    * Fix documentation and implementation missmatch for function arguments of
 
-      mbedtls_gcm_finish(). Found by cmiatpaar. #602
 
-    * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558
 
-    * Fix potential byte overread when verifying malformed SERVER_HELLO in
 
-      ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken.
 
-    * Fix check for validity of date when parsing in mbedtls_x509_get_time().
 
-      Found by subramanyam-c. #626
 
-    * Fix compatibility issue with Internet Explorer client authentication,
 
-      where the limited hash choices prevented the client from sending its
 
-      certificate. Found by teumas. #513
 
-    * Fix compilation without MBEDTLS_SELF_TEST enabled.
 
- Changes
 
-    * Extended test coverage of special cases, and added new timing test suite.
 
-    * Removed self-tests from the basic-built-test.sh script, and added all
 
-      missing self-tests to the test suites, to ensure self-tests are only
 
-      executed once.
 
-    * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len().
 
-    * Added support for a Yotta specific configuration file -
 
-      through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE.
 
-    * Added optimization for code space for X.509/OID based on configured
 
-      features. Contributed by Aviv Palivoda.
 
-    * Renamed source file library/net.c to library/net_sockets.c to avoid
 
-      naming collision in projects which also have files with the common name
 
-      net.c. For consistency, the corresponding header file, net.h, is marked as
 
-      deprecated, and its contents moved to net_sockets.h.
 
-    * Changed the strategy for X.509 certificate parsing and validation, to no
 
-      longer disregard certificates with unrecognised fields.
 
- = mbed TLS 2.3.0 branch released 2016-06-28
 
- Security
 
-    * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt
 
-      required by PKCS1 v2.2
 
-    * Fix potential integer overflow to buffer overflow in
 
-      mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt
 
-      (not triggerable remotely in (D)TLS).
 
-    * Fix a potential integer underflow to buffer overread in
 
-      mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in
 
-      SSL/TLS.
 
- Features
 
-    * Support for platform abstraction of the standard C library time()
 
-      function.
 
- Bugfix
 
-    * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three
 
-      arguments where the same (in-place doubling). Found and fixed by Janos
 
-      Follath. #309
 
-    * Fix potential build failures related to the 'apidoc' target, introduced
 
-      in the previous patch release. Found by Robert Scheck. #390 #391
 
-    * Fix issue in Makefile that prevented building using armar. #386
 
-    * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and
 
-      ECDSA was disabled in config.h . The leak didn't occur by default.
 
-    * Fix an issue that caused valid certificates to be rejected whenever an
 
-      expired or not yet valid certificate was parsed before a valid certificate
 
-      in the trusted certificate list.
 
-    * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the
 
-      buffer after DER certificates to be included in the raw representation.
 
-    * Fix issue that caused a hang when generating RSA keys of odd bitlength
 
-    * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer
 
-      dereference possible.
 
-    * Fix issue that caused a crash if invalid curves were passed to
 
-      mbedtls_ssl_conf_curves. #373
 
-    * Fix issue in ssl_fork_server which was preventing it from functioning. #429
 
-    * Fix memory leaks in test framework
 
-    * Fix test in ssl-opt.sh that does not run properly with valgrind
 
-    * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502
 
- Changes
 
-    * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5,
 
-      don't use the optimized assembly for bignum multiplication. This removes
 
-      the need to pass -fomit-frame-pointer to avoid a build error with -O0.
 
-    * Disabled SSLv3 in the default configuration.
 
-    * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey
 
-      Skalozub).
 
-    * Fix non-compliance server extension handling. Extensions for SSLv3 are now
 
-      ignored, as required by RFC6101.
 
- = mbed TLS 2.2.1 released 2016-01-05
 
- Security
 
-    * Fix potential double free when mbedtls_asn1_store_named_data() fails to
 
-      allocate memory. Only used for certificate generation, not triggerable
 
-      remotely in SSL/TLS. Found by Rafał Przywara. #367
 
-    * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the
 
-      SLOTH attack on TLS 1.2 server authentication (other attacks from the
 
-      SLOTH paper do not apply to any version of mbed TLS or PolarSSL).
 
-      https://www.mitls.org/pages/attacks/SLOTH
 
- Bugfix
 
-    * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362
 
-    * Fix bug in certificate validation that caused valid chains to be rejected
 
-      when the first intermediate certificate has pathLenConstraint=0. Found by
 
-      Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280
 
-    * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by
 
-      JayaraghavendranK. #372
 
-    * Fix suboptimal handling of unexpected records that caused interop issues
 
-      with some peers over unreliable links. Avoid dropping an entire DTLS
 
-      datagram if a single record in a datagram is unexpected, instead only
 
-      drop the record and look at subsequent records (if any are present) in
 
-      the same datagram. Found by jeannotlapin. #345
 
- = mbed TLS 2.2.0 released 2015-11-04
 
- Security
 
-    * Fix potential double free if mbedtls_ssl_conf_psk() is called more than
 
-      once and some allocation fails. Cannot be forced remotely. Found by Guido
 
-      Vranken, Intelworks.
 
-    * Fix potential heap corruption on Windows when
 
-      mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be
 
-      triggered remotely. Found by Guido Vranken, Intelworks.
 
-    * Fix potential buffer overflow in some asn1_write_xxx() functions.
 
-      Cannot be triggered remotely unless you create X.509 certificates based
 
-      on untrusted input or write keys of untrusted origin. Found by Guido
 
-      Vranken, Intelworks.
 
-    * The X509 max_pathlen constraint was not enforced on intermediate
 
-      certificates. Found by Nicholas Wilson, fix and tests provided by
 
-      Janos Follath. #280 and #319
 
- Features
 
-    * Experimental support for EC J-PAKE as defined in Thread 1.0.0.
 
-      Disabled by default as the specification might still change.
 
-    * Added a key extraction callback to accees the master secret and key
 
-      block. (Potential uses include EAP-TLS and Thread.)
 
- Bugfix
 
-    * Self-signed certificates were not excluded from pathlen counting,
 
-      resulting in some valid X.509 being incorrectly rejected. Found and fix
 
-      provided by Janos Follath. #319
 
-    * Fix build error with configurations where ECDHE-PSK is the only key
 
-      exchange. Found and fix provided by Chris Hammond. #270
 
-    * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or
 
-      ECHD-ECDSA if the only key exchange. Multiple reports. #310
 
-    * Fixed a bug causing some handshakes to fail due to some non-fatal alerts
 
-      not being properly ignored. Found by mancha and Kasom Koht-arsa, #308
 
-    * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and
 
-      size/curve against the profile. Before that, there was no way to set a
 
-      minimum key size for end-entity certificates with RSA keys. Found by
 
-      Matthew Page of Scannex Electronics Ltd.
 
-    * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
 
-      Found by Kurt Danielson. #292
 
-    * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
 
-    * Fix bug in ASN.1 encoding of booleans that caused generated CA
 
-      certificates to be rejected by some applications, including OS X
 
-      Keychain. Found and fixed by Jonathan Leroy, Inikup.
 
- Changes
 
-    * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1
 
-      or -1.
 
- = mbed TLS 2.1.2 released 2015-10-06
 
- Security
 
-    * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer
 
-      overflow of the hostname or session ticket. Found by Guido Vranken,
 
-      Intelworks.
 
-    * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than
 
-      once in the same handhake and mbedtls_ssl_conf_psk() was used.
 
-      Found and patch provided by Guido Vranken, Intelworks. Cannot be forced
 
-      remotely.
 
-    * Fix stack buffer overflow in pkcs12 decryption (used by
 
-      mbedtls_pk_parse_key(file)() when the password is > 129 bytes.
 
-      Found by Guido Vranken, Intelworks. Not triggerable remotely.
 
-    * Fix potential buffer overflow in mbedtls_mpi_read_string().
 
-      Found by Guido Vranken, Intelworks. Not exploitable remotely in the context
 
-      of TLS, but might be in other uses. On 32 bit machines, requires reading a
 
-      string of close to or larger than 1GB to exploit; on 64 bit machines, would
 
-      require reading a string of close to or larger than 2^62 bytes.
 
-    * Fix potential random memory allocation in mbedtls_pem_read_buffer()
 
-      on crafted PEM input data. Found and fix provided by Guido Vranken,
 
-      Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you
 
-      accept PEM data from an untrusted source.
 
-    * Fix possible heap buffer overflow in base64_encoded() when the input
 
-      buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken,
 
-      Intelworks. Not trigerrable remotely in TLS.
 
-    * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on
 
-      the same mbedtls_ssl_config object and memory allocation fails. Found by
 
-      Guido Vranken, Intelworks. Cannot be forced remotely.
 
-    * Fix potential heap buffer overflow in servers that perform client
 
-      authentication against a crafted CA cert. Cannot be triggered remotely
 
-      unless you allow third parties to pick trust CAs for client auth.
 
-      Found by Guido Vranken, Intelworks.
 
- Bugfix
 
-    * Fix compile error in net.c with musl libc. Found and patch provided by
 
-      zhasha (#278).
 
-    * Fix macroization of 'inline' keyword when building as C++. (#279)
 
- Changes
 
-    * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure
 
-      domain names are compliant with RFC 1035.
 
-    * Fixed paths for check_config.h in example config files. (Found by bachp)
 
-      (#291)
 
- = mbed TLS 2.1.1 released 2015-09-17
 
- Security
 
-    * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5
 
-      signatures. (Found by Florian Weimer, Red Hat.)
 
-      https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
 
-    * Fix possible client-side NULL pointer dereference (read) when the client
 
-      tries to continue the handshake after it failed (a misuse of the API).
 
-      (Found and patch provided by Fabian Foerg, Gotham Digital Science using
 
-      afl-fuzz.)
 
- Bugfix
 
-    * Fix warning when using a 64bit platform. (found by embedthis) (#275)
 
-    * Fix off-by-one error in parsing Supported Point Format extension that
 
-      caused some handshakes to fail.
 
- Changes
 
-    * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow
 
-      use of mbedtls_x509_crt_profile_next. (found by NWilson)
 
-    * When a client initiates a reconnect from the same port as a live
 
-      connection, if cookie verification is available
 
-      (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie
 
-      callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be
 
-      detected and mbedtls_ssl_read() will return
 
-      MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new
 
-      handshake with the same context. (See RFC 6347 section 4.2.8.)
 
- = mbed TLS 2.1.0 released 2015-09-04
 
- Features
 
-    * Added support for yotta as a build system.
 
-    * Primary open source license changed to Apache 2.0 license.
 
- Bugfix
 
-    * Fix segfault in the benchmark program when benchmarking DHM.
 
-    * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo
 
-      Leisink).
 
-    * Fix bug when parsing a ServerHello without extensions (found by David
 
-      Sears).
 
-    * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed
 
-      (found by Benoit Lecocq).
 
-    * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be
 
-      installed (found by Rawi666).
 
-    * Fix compile error with armcc 5 with --gnu option.
 
-    * Fix bug in Makefile that caused programs not to be installed correctly
 
-      (found by robotanarchy) (#232).
 
-    * Fix bug in Makefile that prevented from installing without building the
 
-      tests (found by robotanarchy) (#232).
 
-    * Fix missing -static-libgcc when building shared libraries for Windows
 
-      with make.
 
-    * Fix link error when building shared libraries for Windows with make.
 
-    * Fix error when loading libmbedtls.so.
 
-    * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to
 
-      be always used (found by dcb314) (#235)
 
-    * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could
 
-      result trying to unlock an unlocked mutex on invalid input (found by
 
-      Fredrik Axelsson) (#257)
 
-    * Fix -Wshadow warnings (found by hnrkp) (#240)
 
-    * Fix memory corruption on client with overlong PSK identity, around
 
-      SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by
 
-      Aleksandrs Saveljevs) (#238)
 
-    * Fix unused function warning when using MBEDTLS_MDx_ALT or
 
-      MBEDTLS_SHAxxx_ALT (found by Henrik) (#239)
 
-    * Fix memory corruption in pkey programs (found by yankuncheng) (#210)
 
- Changes
 
-    * The PEM parser now accepts a trailing space at end of lines (#226).
 
-    * It is now possible to #include a user-provided configuration file at the
 
-      end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the
 
-      compiler's command line.
 
-    * When verifying a certificate chain, if an intermediate certificate is
 
-      trusted, no later cert is checked. (suggested by hannes-landeholm)
 
-      (#220).
 
-    * Prepend a "thread identifier" to debug messages (issue pointed out by
 
-      Hugo Leisink) (#210).
 
-    * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment
 
-      length.
 
- = mbed TLS 2.0.0 released 2015-07-13
 
- Features
 
-    * Support for DTLS 1.0 and 1.2 (RFC 6347).
 
-    * Ability to override core functions from MDx, SHAx, AES and DES modules
 
-      with custom implementation (eg hardware accelerated), complementing the
 
-      ability to override the whole module.
 
-    * New server-side implementation of session tickets that rotate keys to
 
-      preserve forward secrecy, and allows sharing across multiple contexts.
 
-    * Added a concept of X.509 cerificate verification profile that controls
 
-      which algorithms and key sizes (curves for ECDSA) are acceptable.
 
-    * Expanded configurability of security parameters in the SSL module with
 
-      mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes().
 
-    * Introduced a concept of presets for SSL security-relevant configuration
 
-      parameters.
 
- API Changes
 
-    * The library has been split into libmbedcrypto, libmbedx509, libmbedtls.
 
-      You now need to link to all of them if you use TLS for example.
 
-    * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace.
 
-      Some names have been further changed to make them more consistent.
 
-      Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are
 
-      provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt
 
-    * Renamings of fields inside structures, not covered by the previous list:
 
-      mbedtls_cipher_info_t.key_length -> key_bitlen
 
-      mbedtls_cipher_context_t.key_length -> key_bitlen
 
-      mbedtls_ecp_curve_info.size -> bit_size
 
-    * Headers are now found in the 'mbedtls' directory (previously 'polarssl').
 
-    * The following _init() functions that could return errors have
 
-      been split into an _init() that returns void and another function that
 
-      should generally be the first function called on this context after init:
 
-      mbedtls_ssl_init() -> mbedtls_ssl_setup()
 
-      mbedtls_ccm_init() -> mbedtls_ccm_setkey()
 
-      mbedtls_gcm_init() -> mbedtls_gcm_setkey()
 
-      mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)()
 
-      mbedtls_ctr_drbg_init()  -> mbedtls_ctr_drbg_seed()
 
-      Note that for mbedtls_ssl_setup(), you need to be done setting up the
 
-      ssl_config structure before calling it.
 
-    * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(),
 
-      ssl_set_session() and ssl_set_client_transport_id(), plus
 
-      ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx()
 
-      (see rename.pl and compat-1.3.h above) and their first argument's type
 
-      changed from ssl_context to ssl_config.
 
-    * ssl_set_bio() changed signature (contexts merged, order switched, one
 
-      additional callback for read-with-timeout).
 
-    * The following functions have been introduced and must be used in callback
 
-      implementations (SNI, PSK) instead of their *conf counterparts:
 
-      mbedtls_ssl_set_hs_own_cert()
 
-      mbedtls_ssl_set_hs_ca_chain()
 
-      mbedtls_ssl_set_hs_psk()
 
-    * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set
 
-      using mbedtls_ssl_set_hostname().
 
-    * mbedtls_ssl_conf_session_cache() changed prototype (only one context
 
-      pointer, parameters reordered).
 
-    * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in
 
-      place of mbedtls_ssl_conf_session_tickets() to enable session tickets.
 
-    * The SSL debug callback gained two new arguments (file name, line number).
 
-    * Debug modes were removed.
 
-    * mbedtls_ssl_conf_truncated_hmac() now returns void.
 
-    * mbedtls_memory_buffer_alloc_init() now returns void.
 
-    * X.509 verification flags are now an uint32_t. Affect the signature of:
 
-      mbedtls_ssl_get_verify_result()
 
-      mbedtls_x509_ctr_verify_info()
 
-      mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated)
 
-      mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated)
 
-    * The following functions changed prototype to avoid an in-out length
 
-      parameter:
 
-      mbedtls_base64_encode()
 
-      mbedtls_base64_decode()
 
-      mbedtls_mpi_write_string()
 
-      mbedtls_dhm_calc_secret()
 
-    * In the NET module, all "int" and "int *" arguments for file descriptors
 
-      changed type to "mbedtls_net_context *".
 
-    * net_accept() gained new arguments for the size of the client_ip buffer.
 
-    * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now
 
-      return void.
 
-    * ecdsa_write_signature() gained an additional md_alg argument and
 
-      ecdsa_write_signature_det() was deprecated.
 
-    * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA.
 
-    * Last argument of x509_crt_check_key_usage() and
 
-      mbedtls_x509write_crt_set_key_usage() changed from int to unsigned.
 
-    * test_ca_list (from certs.h) is renamed to test_cas_pem and is only
 
-      available if POLARSSL_PEM_PARSE_C is defined (it never worked without).
 
-    * Test certificates in certs.c are no longer guaranteed to be nul-terminated
 
-      strings; use the new *_len variables instead of strlen().
 
-    * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(),
 
-      mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the
 
-      length parameter to include the terminating null byte for PEM input.
 
-    * Signature of mpi_mul_mpi() changed to make the last argument unsigned
 
-    * calloc() is now used instead of malloc() everywhere. API of platform
 
-      layer and the memory_buffer_alloc module changed accordingly.
 
-      (Thanks to Mansour Moufid for helping with the replacement.)
 
-    * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION
 
-      (support for renegotiation now needs explicit enabling in config.h).
 
-    * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE
 
-      in config.h
 
-    * net_connect() and net_bind() have a new 'proto' argument to choose
 
-      between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP.
 
-      Their 'port' argument type is changed to a string.
 
-    * Some constness fixes
 
- Removals
 
-    * Removed mbedtls_ecp_group_read_string(). Only named groups are supported.
 
-    * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use
 
-      mbedtls_ecp_muladd().
 
-    * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions
 
-      (use generic functions from md.h)
 
-    * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom
 
-      waiting function.
 
-    * Removed test DHM parameters from the test certs module.
 
-    * Removed the PBKDF2 module (use PKCS5).
 
-    * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()).
 
-    * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3).
 
-    * Removed openssl.h (very partial OpenSSL compatibility layer).
 
-    * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on).
 
-    * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have
 
-      been removed (compiler is required to support 32-bit operations).
 
-    * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled).
 
-    * Removed test program o_p_test, the script compat.sh does more.
 
-    * Removed test program ssl_test, superseded by ssl-opt.sh.
 
-    * Removed helper script active-config.pl
 
- New deprecations
 
-    * md_init_ctx() is deprecated in favour of md_setup(), that adds a third
 
-      argument (allowing memory savings if HMAC is not used)
 
- Semi-API changes (technically public, morally private)
 
-    * Renamed a few headers to include _internal in the name. Those headers are
 
-      not supposed to be included by users.
 
-    * Changed md_info_t into an opaque structure (use md_get_xxx() accessors).
 
-    * Changed pk_info_t into an opaque structure.
 
-    * Changed cipher_base_t into an opaque structure.
 
-    * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl.
 
-    * x509_crt.key_usage changed from unsigned char to unsigned int.
 
-    * Removed r and s from ecdsa_context
 
-    * Removed mode from des_context and des3_context
 
- Default behavior changes
 
-    * The default minimum TLS version is now TLS 1.0.
 
-    * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the
 
-      default ciphersuite list returned by ssl_list_ciphersuites()
 
-    * Support for receiving SSLv2 ClientHello is now disabled by default at
 
-      compile time.
 
-    * The default authmode for SSL/TLS clients is now REQUIRED.
 
-    * Support for RSA_ALT contexts in the PK layer is now optional. Since is is
 
-      enabled in the default configuration, this is only noticeable if using a
 
-      custom config.h
 
-    * Default DHM parameters server-side upgraded from 1024 to 2048 bits.
 
-    * A minimum RSA key size of 2048 bits is now enforced during ceritificate
 
-      chain verification.
 
-    * Negotiation of truncated HMAC is now disabled by default on server too.
 
-    * The following functions are now case-sensitive:
 
-      mbedtls_cipher_info_from_string()
 
-      mbedtls_ecp_curve_info_from_name()
 
-      mbedtls_md_info_from_string()
 
-      mbedtls_ssl_ciphersuite_from_string()
 
-      mbedtls_version_check_feature()
 
- Requirement changes
 
-    * The minimum MSVC version required is now 2010 (better C99 support).
 
-    * The NET layer now unconditionnaly relies on getaddrinfo() and select().
 
-    * Compiler is required to support C99 types such as long long and uint32_t.
 
- API changes from the 1.4 preview branch
 
-    * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with
 
-      new prototype, and mbedtls_ssl_set_read_timeout().
 
-    * The following functions now return void:
 
-      mbedtls_ssl_conf_transport()
 
-      mbedtls_ssl_conf_max_version()
 
-      mbedtls_ssl_conf_min_version()
 
-    * DTLS no longer hard-depends on TIMING_C, but uses a callback interface
 
-      instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing
 
-      an example implementation, see mbedtls_timing_delay_context and
 
-      mbedtls_timing_set/get_delay().
 
-    * With UDP sockets, it is no longer necessary to call net_bind() again
 
-      after a successful net_accept().
 
- Changes
 
-    * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now
 
-      thread-safe if MBEDTLS_THREADING_C is enabled.
 
-    * Reduced ROM fooprint of SHA-256 and added an option to reduce it even
 
-      more (at the expense of performance) MBEDTLS_SHA256_SMALLER.
 
- = mbed TLS 1.3 branch
 
- Security
 
-    * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and
 
-      extendedKeyUsage on the leaf certificate was lost (results not accessible
 
-      via ssl_get_verify_results()).
 
-    * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
 
-      https://dl.acm.org/citation.cfm?id=2714625
 
- Features
 
-    * Improve ECC performance by using more efficient doubling formulas
 
-      (contributed by Peter Dettman).
 
-    * Add x509_crt_verify_info() to display certificate verification results.
 
-    * Add support for reading DH parameters with privateValueLength included
 
-      (contributed by Daniel Kahn Gillmor).
 
-    * Add support for bit strings in X.509 names (request by Fredrik Axelsson).
 
-    * Add support for id-at-uniqueIdentifier in X.509 names.
 
-    * Add support for overriding snprintf() (except on Windows) and exit() in
 
-      the platform layer.
 
-    * Add an option to use macros instead of function pointers in the platform
 
-      layer (helps get rid of unwanted references).
 
-    * Improved Makefiles for Windows targets by fixing library targets and making
 
-      cross-compilation easier (thanks to Alon Bar-Lev).
 
-    * The benchmark program also prints heap usage for public-key primitives
 
-      if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined.
 
-    * New script ecc-heap.sh helps measuring the impact of ECC parameters on
 
-      speed and RAM (heap only for now) usage.
 
-    * New script memory.sh helps measuring the ROM and RAM requirements of two
 
-      reduced configurations (PSK-CCM and NSA suite B).
 
-    * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce
 
-      warnings on use of deprecated functions (with GCC and Clang only).
 
-    * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce
 
-      errors on use of deprecated functions.
 
- Bugfix
 
-    * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS.
 
-    * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara).
 
-    * Fix bug in entropy.c when THREADING_C is also enabled that caused
 
-      entropy_free() to crash (thanks to Rafał Przywara).
 
-    * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than
 
-      once on the same context.
 
-    * Fix bug in ssl_mail_client when password is longer that username (found
 
-      by Bruno Pape).
 
-    * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules
 
-      (detected by Clang's 3.6 UBSan).
 
-    * mpi_size() and mpi_msb() would segfault when called on an mpi that is
 
-      initialized but not set (found by pravic).
 
-    * Fix detection of support for getrandom() on Linux (reported by syzzer) by
 
-      doing it at runtime (using uname) rather that compile time.
 
-    * Fix handling of symlinks by "make install" (found by Gaël PORTAY).
 
-    * Fix potential NULL pointer dereference (not trigerrable remotely) when
 
-      ssl_write() is called before the handshake is finished (introduced in
 
-      1.3.10) (first reported by Martin Blumenstingl).
 
-    * Fix bug in pk_parse_key() that caused some valid private EC keys to be
 
-      rejected.
 
-    * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
 
-    * Fix thread safety bug in RSA operations (found by Fredrik Axelsson).
 
-    * Fix hardclock() (only used in the benchmarking program) with some
 
-      versions of mingw64 (found by kxjhlele).
 
-    * Fix warnings from mingw64 in timing.c (found by kxjklele).
 
-    * Fix potential unintended sign extension in asn1_get_len() on 64-bit
 
-      platforms.
 
-    * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid).
 
-    * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and
 
-      POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced
 
-      in 1.3.10).
 
-    * Add missing extern "C" guard in aesni.h (reported by amir zamani).
 
-    * Add missing dependency on SHA-256 in some x509 programs (reported by
 
-      Gergely Budai).
 
-    * Fix bug related to ssl_set_curves(): the client didn't check that the
 
-      curve picked by the server was actually allowed.
 
- Changes
 
-    * Remove bias in mpi_gen_prime (contributed by Pascal Junod).
 
-    * Remove potential sources of timing variations (some contributed by Pascal
 
-      Junod).
 
-    * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated.
 
-    * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated.
 
-    * compat-1.2.h and openssl.h are deprecated.
 
-    * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now
 
-      more flexible (warning: OFLAGS is not used any more) (see the README)
 
-      (contributed by Alon Bar-Lev).
 
-    * ssl_set_own_cert() no longer calls pk_check_pair() since the
 
-      performance impact was bad for some users (this was introduced in 1.3.10).
 
-    * Move from SHA-1 to SHA-256 in example programs using signatures
 
-      (suggested by Thorsten Mühlfelder).
 
-    * Remove some unneeded inclusions of header files from the standard library
 
-      "minimize" others (eg use stddef.h if only size_t is needed).
 
-    * Change #include lines in test files to use double quotes instead of angle
 
-      brackets for uniformity with the rest of the code.
 
-    * Remove dependency on sscanf() in X.509 parsing modules.
 
- = mbed TLS 1.3.10 released 2015-02-09
 
- Security
 
-    * NULL pointer dereference in the buffer-based allocator when the buffer is
 
-      full and polarssl_free() is called (found by Mark Hasemeyer)
 
-      (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is
 
-      not by default).
 
-    * Fix remotely-triggerable uninitialised pointer dereference caused by
 
-      crafted X.509 certificate (TLS server is not affected if it doesn't ask for a
 
-      client certificate) (found using Codenomicon Defensics).
 
-    * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
 
-      (TLS server is not affected if it doesn't ask for a client certificate)
 
-      (found using Codenomicon Defensics).
 
-    * Fix potential stack overflow while parsing crafted X.509 certificates
 
-      (TLS server is not affected if it doesn't ask for a client certificate)
 
-      (found using Codenomicon Defensics).
 
-    * Fix timing difference that could theoretically lead to a
 
-      Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges
 
-      (reported by Sebastian Schinzel).
 
- Features
 
-    * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv).
 
-    * Add support for Extended Master Secret (draft-ietf-tls-session-hash).
 
-    * Add support for Encrypt-then-MAC (RFC 7366).
 
-    * Add function pk_check_pair() to test if public and private keys match.
 
-    * Add x509_crl_parse_der().
 
-    * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
 
-      length of an X.509 verification chain.
 
-    * Support for renegotiation can now be disabled at compile-time
 
-    * Support for 1/n-1 record splitting, a countermeasure against BEAST.
 
-    * Certificate selection based on signature hash, preferring SHA-1 over SHA-2
 
-      for pre-1.2 clients when multiple certificates are available.
 
-    * Add support for getrandom() syscall on recent Linux kernels with Glibc or
 
-      a compatible enough libc (eg uClibc).
 
-    * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime
 
-      while using the default ciphersuite list.
 
-    * Added new error codes and debug messages about selection of
 
-      ciphersuite/certificate.
 
- Bugfix
 
-    * Stack buffer overflow if ctr_drbg_update() is called with too large
 
-      add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
 
-    * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE
 
-      if memory_buffer_alloc_init() was called with buf not aligned and len not
 
-      a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely).
 
-    * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found
 
-      by Julian Ospald).
 
-    * Fix potential undefined behaviour in Camellia.
 
-    * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a
 
-      multiple of 8 (found by Gergely Budai).
 
-    * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
 
-      Peter Vaskovic).
 
-    * Fix assembly selection for MIPS64 (thanks to James Cowgill).
 
-    * ssl_get_verify_result() now works even if the handshake was aborted due
 
-      to a failed verification (found by Fredrik Axelsson).
 
-    * Skip writing and parsing signature_algorithm extension if none of the
 
-      key exchanges enabled needs certificates. This fixes a possible interop
 
-      issue with some servers when a zero-length extension was sent. (Reported
 
-      by Peter Dettman.)
 
-    * On a 0-length input, base64_encode() did not correctly set output length
 
-      (found by Hendrik van den Boogaard).
 
- Changes
 
-    * Use deterministic nonces for AEAD ciphers in TLS by default (possible to
 
-      switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h).
 
-    * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
 
-    * ssl_set_own_cert() now returns an error on key-certificate mismatch.
 
-    * Forbid repeated extensions in X.509 certificates.
 
-    * debug_print_buf() now prints a text view in addition to hexadecimal.
 
-    * A specific error is now returned when there are ciphersuites in common
 
-      but none of them is usable due to external factors such as no certificate
 
-      with a suitable (extended)KeyUsage or curve or no PSK set.
 
-    * It is now possible to disable negotiation of truncated HMAC server-side
 
-      at runtime with ssl_set_truncated_hmac().
 
-    * Example programs for SSL client and server now disable SSLv3 by default.
 
-    * Example programs for SSL client and server now disable RC4 by default.
 
-    * Use platform.h in all test suites and programs.
 
- = PolarSSL 1.3.9 released 2014-10-20
 
- Security
 
-    * Lowest common hash was selected from signature_algorithms extension in
 
-      TLS 1.2 (found by Darren Bane) (introduced in 1.3.8).
 
-    * Remotely-triggerable memory leak when parsing some X.509 certificates
 
-      (server is not affected if it doesn't ask for a client certificate)
 
-      (found using Codenomicon Defensics).
 
-    * Remotely-triggerable memory leak when parsing crafted ClientHello
 
-      (not affected if ECC support was compiled out) (found using Codenomicon
 
-      Defensics).
 
- Bugfix
 
-    * Support escaping of commas in x509_string_to_names()
 
-    * Fix compile error in ssl_pthread_server (found by Julian Ospald).
 
-    * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
 
-    * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
 
-    * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
 
-    * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST
 
-      are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito).
 
-    * Remove non-existent file from VS projects (found by Peter Vaskovic).
 
-    * ssl_read() could return non-application data records on server while
 
-      renegotation was pending, and on client when a HelloRequest was received.
 
-    * Server-initiated renegotiation would fail with non-blocking I/O if the
 
-      write callback returned WANT_WRITE when requesting renegotiation.
 
-    * ssl_close_notify() could send more than one message in some circumstances
 
-      with non-blocking I/O.
 
-    * Fix compiler warnings on iOS (found by Sander Niemeijer).
 
-    * x509_crt_parse() did not increase total_failed on PEM error
 
-    * Fix compile error with armcc in mpi_is_prime()
 
-    * Fix potential bad read in parsing ServerHello (found by Adrien
 
-      Vialletelle).
 
- Changes
 
-    * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no
 
-      standard defining how to use SHA-2 with SSL 3.0).
 
-    * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is
 
-      ambiguous on how to encode some packets with SSL 3.0).
 
-    * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if
 
-      RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger.
 
-    * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
 
-      POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
 
-    * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits
 
-      RSA keys.
 
-    * Accept spaces at end of line or end of buffer in base64_decode().
 
-    * X.509 certificates with more than one AttributeTypeAndValue per
 
-      RelativeDistinguishedName are not accepted any more.
 
- = PolarSSL 1.3.8 released 2014-07-11
 
- Security
 
-    * Fix length checking for AEAD ciphersuites (found by Codenomicon).
 
-      It was possible to crash the server (and client) using crafted messages
 
-      when a GCM suite was chosen.
 
- Features
 
-    * Add CCM module and cipher mode to Cipher Layer
 
-    * Support for CCM and CCM_8 ciphersuites
 
-    * Support for parsing and verifying RSASSA-PSS signatures in the X.509
 
-      modules (certificates, CRLs and CSRs).
 
-    * Blowfish in the cipher layer now supports variable length keys.
 
-    * Add example config.h for PSK with CCM, optimized for low RAM usage.
 
-    * Optimize for RAM usage in example config.h for NSA Suite B profile.
 
-    * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites
 
-      from the default list (inactive by default).
 
-    * Add server-side enforcement of sent renegotiation requests
 
-      (ssl_set_renegotiation_enforced())
 
-    * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of
 
-      ciphersuites to use and save some memory if the list is small.
 
- Changes
 
-    * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is
 
-      required on some platforms (e.g. OpenBSD)
 
-    * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
 
-      against unwanted compiler optimizations
 
-    * md_list() now returns hashes strongest first
 
-    * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks
 
-      strongest offered by client.
 
-    * All public contexts have _init() and _free() functions now for simpler
 
-      usage pattern
 
- Bugfix
 
-    * Fix in debug_print_msg()
 
-    * Enforce alignment in the buffer allocator even if buffer is not aligned
 
-    * Remove less-than-zero checks on unsigned numbers
 
-    * Stricter check on SSL ClientHello internal sizes compared to actual packet
 
-      size (found by TrustInSoft)
 
-    * Fix WSAStartup() return value check (found by Peter Vaskovic)
 
-    * Other minor issues (found by Peter Vaskovic)
 
-    * Fix symlink command for cross compiling with CMake (found by Andre
 
-      Heinecke)
 
-    * Fix DER output of gen_key app (found by Gergely Budai)
 
-    * Very small records were incorrectly rejected when truncated HMAC was in
 
-      use with some ciphersuites and versions (RC4 in all versions, CBC with
 
-      versions < TLS 1.1).
 
-    * Very large records using more than 224 bytes of padding were incorrectly
 
-      rejected with CBC-based ciphersuites and TLS >= 1.1
 
-    * Very large records using less padding could cause a buffer overread of up
 
-      to 32 bytes with CBC-based ciphersuites and TLS >= 1.1
 
-    * Restore ability to use a v1 cert as a CA if trusted locally. (This had
 
-      been removed in 1.3.6.)
 
-    * Restore ability to locally trust a self-signed cert that is not a proper
 
-      CA for use as an end entity certificate. (This had been removed in
 
-      1.3.6.)
 
-    * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
 
-    * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
 
-      interpret semicolons as comment delimiters (found by Barry K. Nathan).
 
-    * Fix off-by-one error in parsing Supported Point Format extension that
 
-      caused some handshakes to fail.
 
-    * Fix possible miscomputation of the premaster secret with DHE-PSK key
 
-      exchange that caused some handshakes to fail with other implementations.
 
-      (Failure rate <= 1/255 with common DHM moduli.)
 
-    * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
 
-    * Fix base64_decode() to return and check length correctly (in case of
 
-      tight buffers)
 
-    * Fix mpi_write_string() to write "00" as hex output for empty MPI (found
 
-      by Hui Dong)
 
- = PolarSSL 1.3.7 released on 2014-05-02
 
- Features
 
-    * debug_set_log_mode() added to determine raw or full logging
 
-    * debug_set_threshold() added to ignore messages over threshold level
 
-    * version_check_feature() added to check for compile-time options at
 
-      run-time
 
- Changes
 
-    * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually
 
-      checked and filled in the relevant module headers
 
-    * Debug module only outputs full lines instead of parts
 
-    * Better support for the different Attribute Types from IETF PKIX (RFC 5280)
 
-    * AES-NI now compiles with "old" assemblers too
 
-    * Ciphersuites based on RC4 now have the lowest priority by default
 
- Bugfix
 
-    * Only iterate over actual certificates in ssl_write_certificate_request()
 
-      (found by Matthew Page)
 
-    * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan
 
-      Karger)
 
-    * cert_write app should use subject of issuer certificate as issuer of cert
 
-    * Fix false reject in padding check in ssl_decrypt_buf() for CBC
 
-      ciphersuites, for full SSL frames of data.
 
-    * Improve interoperability by not writing extension length in ClientHello /
 
-      ServerHello when no extensions are present (found by Matthew Page)
 
-    * rsa_check_pubkey() now allows an E up to N
 
-    * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
 
-    * mpi_fill_random() was creating numbers larger than requested on
 
-      big-endian platform when size was not an integer number of limbs
 
-    * Fix dependencies issues in X.509 test suite.
 
-    * Some parts of ssl_tls.c were compiled even when the module was disabled.
 
-    * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
 
-    * Fix detection of Clang on some Apple platforms with CMake
 
-      (found by Barry K. Nathan)
 
- = PolarSSL 1.3.6 released on 2014-04-11
 
- Features
 
-    * Support for the ALPN SSL extension
 
-    * Add option 'use_dev_random' to gen_key application
 
-    * Enable verification of the keyUsage extension for CA and leaf
 
-      certificates (POLARSSL_X509_CHECK_KEY_USAGE)
 
-    * Enable verification of the extendedKeyUsage extension
 
-      (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE)
 
- Changes
 
-    * x509_crt_info() now prints information about parsed extensions as well
 
-    * pk_verify() now returns a specific error code when the signature is valid
 
-      but shorter than the supplied length.
 
-    * Use UTC time to check certificate validity.
 
-    * Reject certificates with times not in UTC, per RFC 5280.
 
- Security
 
-    * Avoid potential timing leak in ecdsa_sign() by blinding modular division.
 
-      (Found by Watson Ladd.)
 
-    * The notAfter date of some certificates was no longer checked since 1.3.5.
 
-      This affects certificates in the user-supplied chain except the top
 
-      certificate. If the user-supplied chain contains only one certificates,
 
-      it is not affected (ie, its notAfter date is properly checked).
 
-    * Prevent potential NULL pointer dereference in ssl_read_record() (found by
 
-      TrustInSoft)
 
- Bugfix
 
-    * The length of various ClientKeyExchange messages was not properly checked.
 
-    * Some example server programs were not sending the close_notify alert.
 
-    * Potential memory leak in mpi_exp_mod() when error occurs during
 
-      calculation of RR.
 
-    * Fixed malloc/free default #define in platform.c (found by Gergely Budai).
 
-    * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by
 
-      Gergely Budai).
 
-    * Fix #include path in ecdsa.h which wasn't accepted by some compilers.
 
-      (found by Gergely Budai)
 
-    * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by
 
-      Shuo Chen).
 
-    * oid_get_numeric_string() used to truncate the output without returning an
 
-      error if the output buffer was just 1 byte too small.
 
-    * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len.
 
-    * Calling pk_debug() on an RSA-alt key would segfault.
 
-    * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys.
 
-    * Potential buffer overwrite in pem_write_buffer() because of low length
 
-      indication (found by Thijs Alkemade)
 
-    * EC curves constants, which should be only in ROM since 1.3.3, were also
 
-      stored in RAM due to missing 'const's (found by Gergely Budai).
 
- = PolarSSL 1.3.5 released on 2014-03-26
 
- Features
 
-    * HMAC-DRBG as a separate module
 
-    * Option to set the Curve preference order (disabled by default)
 
-    * Single Platform compatilibity layer (for memory / printf / fprintf)
 
-    * Ability to provide alternate timing implementation
 
-    * Ability to force the entropy module to use SHA-256 as its basis
 
-      (POLARSSL_ENTROPY_FORCE_SHA256)
 
-    * Testing script ssl-opt.sh added for testing 'live' ssl option
 
-      interoperability against OpenSSL and PolarSSL
 
-    * Support for reading EC keys that use SpecifiedECDomain in some cases.
 
-    * Entropy module now supports seed writing and reading
 
- Changes
 
-    * Deprecated the Memory layer
 
-    * entropy_add_source(), entropy_update_manual() and entropy_gather()
 
-      now thread-safe if POLARSSL_THREADING_C defined
 
-    * Improvements to the CMake build system, contributed by Julian Ospald.
 
-    * Work around a bug of the version of Clang shipped by Apple with Mavericks
 
-      that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
 
-    * Revamped the compat.sh interoperatibility script to include support for
 
-      testing against GnuTLS
 
-    * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt()
 
-    * Improvements to tests/Makefile, contributed by Oden Eriksson.
 
- Security
 
-    * Forbid change of server certificate during renegotiation to prevent
 
-      "triple handshake" attack when authentication mode is 'optional' (the
 
-      attack was already impossible when authentication is required).
 
-    * Check notBefore timestamp of certificates and CRLs from the future.
 
-    * Forbid sequence number wrapping
 
-    * Fixed possible buffer overflow with overlong PSK
 
-    * Possible remotely-triggered out-of-bounds memory access fixed (found by
 
-      TrustInSoft)
 
- Bugfix
 
-    * ecp_gen_keypair() does more tries to prevent failure because of
 
-      statistics
 
-    * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations
 
-    * Fixed testing with out-of-source builds using cmake
 
-    * Fixed version-major intolerance in server
 
-    * Fixed CMake symlinking on out-of-source builds
 
-    * Fixed dependency issues in test suite
 
-    * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0
 
-    * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
 
-      Alex Wilson.)
 
-    * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled.
 
-    * m_sleep() was sleeping twice too long on most Unix platforms.
 
-    * Fixed bug with session tickets and non-blocking I/O in the unlikely case
 
-      send() would return an EAGAIN error when sending the ticket.
 
-    * ssl_cache was leaking memory when reusing a timed out entry containing a
 
-      client certificate.
 
-    * ssl_srv was leaking memory when client presented a timed out ticket
 
-      containing a client certificate
 
-    * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
 
-      out_ctr failed
 
-    * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
 
-      of one of them failed
 
-    * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts
 
-    * x509_get_current_time() uses localtime_r() to prevent thread issues
 
- = PolarSSL 1.3.4 released on 2014-01-27
 
- Features
 
-    * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1
 
-    * Support for RIPEMD-160
 
-    * Support for AES CFB8 mode
 
-    * Support for deterministic ECDSA (RFC 6979)
 
- Bugfix
 
-    * Potential memory leak in bignum_selftest()
 
-    * Replaced expired test certificate
 
-    * ssl_mail_client now terminates lines with CRLF, instead of LF
 
-    * net module handles timeouts on blocking sockets better (found by Tilman
 
-      Sauerbeck)
 
-    * Assembly format fixes in bn_mul.h
 
- Security
 
-    * Missing MPI_CHK calls added around unguarded mpi calls (found by
 
-      TrustInSoft)
 
- = PolarSSL 1.3.3 released on 2013-12-31
 
- Features
 
-    * EC key generation support in gen_key app
 
-    * Support for adhering to client ciphersuite order preference
 
-      (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
 
-    * Support for Curve25519
 
-    * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites
 
-    * Support for IPv6 in the NET module
 
-    * AES-NI support for AES, AES-GCM and AES key scheduling
 
-    * SSL Pthread-based server example added (ssl_pthread_server)
 
- Changes
 
-    * gen_prime() speedup
 
-    * Speedup of ECP multiplication operation
 
-    * Relaxed some SHA2 ciphersuite's version requirements
 
-    * Dropped use of readdir_r() instead of readdir() with threading support
 
-    * More constant-time checks in the RSA module
 
-    * Split off curves from ecp.c into ecp_curves.c
 
-    * Curves are now stored fully in ROM
 
-    * Memory usage optimizations in ECP module
 
-    * Removed POLARSSL_THREADING_DUMMY
 
- Bugfix
 
-    * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int
 
-    * Fixed X.509 hostname comparison (with non-regular characters)
 
-    * SSL now gracefully handles missing RNG
 
-    * Missing defines / cases for RSA_PSK key exchange
 
-    * crypt_and_hash app checks MAC before final decryption
 
-    * Potential memory leak in ssl_ticket_keys_init()
 
-    * Memory leak in benchmark application
 
-    * Fixed x509_crt_parse_path() bug on Windows platforms
 
-    * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
 
-      TrustInSoft)
 
-    * Fixed potential overflow in certificate size verification in
 
-      ssl_write_certificate() (found by TrustInSoft)
 
- Security
 
-    * Possible remotely-triggered out-of-bounds memory access fixed (found by
 
-      TrustInSoft)
 
- = PolarSSL 1.3.2 released on 2013-11-04
 
- Features
 
-    * PK tests added to test framework
 
-    * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM)
 
-    * Support for Camellia-GCM mode and ciphersuites
 
- Changes
 
-    * Padding checks in cipher layer are now constant-time
 
-    * Value comparisons in SSL layer are now constant-time
 
-    * Support for serialNumber, postalAddress and postalCode in X509 names
 
-    * SSL Renegotiation was refactored
 
- Bugfix
 
-    * More stringent checks in cipher layer
 
-    * Server does not send out extensions not advertised by client
 
-    * Prevent possible alignment warnings on casting from char * to 'aligned *'
 
-    * Misc fixes and additions to dependency checks
 
-    * Const correctness
 
-    * cert_write with selfsign should use issuer_name as subject_name
 
-    * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon)
 
-    * Defines to handle UEFI environment under MSVC
 
-    * Server-side initiated renegotiations send HelloRequest
 
- = PolarSSL 1.3.1 released on 2013-10-15
 
- Features
 
-    * Support for Brainpool curves and TLS ciphersuites (RFC 7027)
 
-    * Support for ECDHE-PSK key-exchange and ciphersuites
 
-    * Support for RSA-PSK key-exchange and ciphersuites
 
- Changes
 
-    * RSA blinding locks for a smaller amount of time
 
-    * TLS compression only allocates working buffer once
 
-    * Introduced POLARSSL_HAVE_READDIR_R for systems without it
 
-    * config.h is more script-friendly
 
- Bugfix
 
-    * Missing MSVC defines added
 
-    * Compile errors with POLARSSL_RSA_NO_CRT
 
-    * Header files with 'polarssl/'
 
-    * Const correctness
 
-    * Possible naming collision in dhm_context
 
-    * Better support for MSVC
 
-    * threading_set_alt() name
 
-    * Added missing x509write_crt_set_version()
 
- = PolarSSL 1.3.0 released on 2013-10-01
 
- Features
 
-    * Elliptic Curve Cryptography module added
 
-    * Elliptic Curve Diffie Hellman module added
 
-    * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS
 
-     (ECDHE-based ciphersuites)
 
-    * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS
 
-     (ECDSA-based ciphersuites)
 
-    * Ability to specify allowed ciphersuites based on the protocol version.
 
-    * PSK and DHE-PSK based ciphersuites added
 
-    * Memory allocation abstraction layer added
 
-    * Buffer-based memory allocator added (no malloc() / free() / HEAP usage)
 
-    * Threading abstraction layer added (dummy / pthread / alternate)
 
-    * Public Key abstraction layer added
 
-    * Parsing Elliptic Curve keys
 
-    * Parsing Elliptic Curve certificates
 
-    * Support for max_fragment_length extension (RFC 6066)
 
-    * Support for truncated_hmac extension (RFC 6066)
 
-    * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros
 
-      (ISO/IEC 7816-4) padding and zero padding in the cipher layer
 
-    * Support for session tickets (RFC 5077)
 
-    * Certificate Request (CSR) generation with extensions (key_usage,
 
-      ns_cert_type)
 
-    * X509 Certificate writing with extensions (basic_constraints,
 
-      issuer_key_identifier, etc)
 
-    * Optional blinding for RSA, DHM and EC
 
-    * Support for multiple active certificate / key pairs in SSL servers for
 
-      the same host (Not to be confused with SNI!)
 
- Changes
 
-    * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2
 
-      individually
 
-    * Introduced separate SSL Ciphersuites module that is based on
 
-      Cipher and MD information
 
-    * Internals for SSL module adapted to have separate IV pointer that is
 
-      dynamically set (Better support for hardware acceleration)
 
-    * Moved all OID functionality to a separate module. RSA function
 
-      prototypes for the RSA sign and verify functions changed as a result
 
-    * Split up the GCM module into a starts/update/finish cycle
 
-    * Client and server now filter sent and accepted ciphersuites on minimum
 
-      and maximum protocol version
 
-    * Ability to disable server_name extension (RFC 6066)
 
-    * Renamed error_strerror() to the less conflicting polarssl_strerror()
 
-      (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC)
 
-    * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly
 
-    * All RSA operations require a random generator for blinding purposes
 
-    * X509 core refactored
 
-    * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4)
 
-    * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME)
 
-    * Support faulty X509 v1 certificates with extensions
 
-      (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3)
 
- Bugfix
 
-    * Fixed parse error in ssl_parse_certificate_request()
 
-    * zlib compression/decompression skipped on empty blocks
 
-    * Support for AIX header locations in net.c module
 
-    * Fixed file descriptor leaks
 
- Security
 
-    * RSA blinding on CRT operations to counter timing attacks
 
-      (found by Cyril Arnaud and Pierre-Alain Fouque)
 
- = Version 1.2.14 released 2015-05-??
 
- Security
 
-    * Fix potential invalid memory read in the server, that allows a client to
 
-      crash it remotely (found by Caj Larsson).
 
-    * Fix potential invalid memory read in certificate parsing, that allows a
 
-      client to crash the server remotely if client authentication is enabled
 
-      (found using Codenomicon Defensics).
 
-    * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
 
-      https://dl.acm.org/citation.cfm?id=2714625
 
- Bugfix
 
-    * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
 
-    * Fix hardclock() (only used in the benchmarking program) with some
 
-      versions of mingw64 (found by kxjhlele).
 
-    * Fix warnings from mingw64 in timing.c (found by kxjklele).
 
-    * Fix potential unintended sign extension in asn1_get_len() on 64-bit
 
-      platforms (found with Coverity Scan).
 
- = Version 1.2.13 released 2015-02-16
 
- Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting
 
-       this will be made in the 1.2 branch at this point.
 
- Security
 
-    * Fix remotely-triggerable uninitialised pointer dereference caused by
 
-      crafted X.509 certificate (TLS server is not affected if it doesn't ask
 
-      for a client certificate) (found using Codenomicon Defensics).
 
-    * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
 
-      (TLS server is not affected if it doesn't ask for a client certificate)
 
-      (found using Codenomicon Defensics).
 
-    * Fix potential stack overflow while parsing crafted X.509 certificates
 
-      (TLS server is not affected if it doesn't ask for a client certificate)
 
-      found using Codenomicon Defensics).
 
-    * Fix buffer overread of size 1 when parsing crafted X.509 certificates
 
-      (TLS server is not affected if it doesn't ask for a client certificate).
 
- Bugfix
 
-    * Fix potential undefined behaviour in Camellia.
 
-    * Fix memory leaks in PKCS#5 and PKCS#12.
 
-    * Stack buffer overflow if ctr_drbg_update() is called with too large
 
-      add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
 
-    * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced
 
-      in 1.2.12).
 
-    * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
 
-      Peter Vaskovic).
 
-    * Fix assembly selection for MIPS64 (thanks to James Cowgill).
 
-    * ssl_get_verify_result() now works even if the handshake was aborted due
 
-      to a failed verification (found by Fredrik Axelsson).
 
-    * Skip writing and parsing signature_algorithm extension if none of the
 
-      key exchanges enabled needs certificates. This fixes a possible interop
 
-      issue with some servers when a zero-length extension was sent. (Reported
 
-      by Peter Dettman.)
 
-    * On a 0-length input, base64_encode() did not correctly set output length
 
-      (found by Hendrik van den Boogaard).
 
- Changes
 
-    * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
 
-    * Forbid repeated extensions in X.509 certificates.
 
-    * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
 
-      length of an X.509 verification chain (default = 8).
 
- = Version 1.2.12 released 2014-10-24
 
- Security
 
-    * Remotely-triggerable memory leak when parsing some X.509 certificates
 
-      (server is not affected if it doesn't ask for a client certificate).
 
-      (Found using Codenomicon Defensics.)
 
- Bugfix
 
-    * Fix potential bad read in parsing ServerHello (found by Adrien
 
-      Vialletelle).
 
-    * ssl_close_notify() could send more than one message in some circumstances
 
-      with non-blocking I/O.
 
-    * x509_crt_parse() did not increase total_failed on PEM error
 
-    * Fix compiler warnings on iOS (found by Sander Niemeijer).
 
-    * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
 
-    * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
 
-    * ssl_read() could return non-application data records on server while
 
-      renegotation was pending, and on client when a HelloRequest was received.
 
-    * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
 
- Changes
 
-    * X.509 certificates with more than one AttributeTypeAndValue per
 
-      RelativeDistinguishedName are not accepted any more.
 
-    * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
 
-      POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
 
-    * Accept spaces at end of line or end of buffer in base64_decode().
 
- = Version 1.2.11 released 2014-07-11
 
- Features
 
-    * Entropy module now supports seed writing and reading
 
- Changes
 
-    * Introduced POLARSSL_HAVE_READDIR_R for systems without it
 
-    * Improvements to the CMake build system, contributed by Julian Ospald.
 
-    * Work around a bug of the version of Clang shipped by Apple with Mavericks
 
-      that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
 
-    * Improvements to tests/Makefile, contributed by Oden Eriksson.
 
-    * Use UTC time to check certificate validity.
 
-    * Reject certificates with times not in UTC, per RFC 5280.
 
-    * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
 
-      against unwanted compiler optimizations
 
- Security
 
-    * Forbid change of server certificate during renegotiation to prevent
 
-      "triple handshake" attack when authentication mode is optional (the
 
-      attack was already impossible when authentication is required).
 
-    * Check notBefore timestamp of certificates and CRLs from the future.
 
-    * Forbid sequence number wrapping
 
-    * Prevent potential NULL pointer dereference in ssl_read_record() (found by
 
-      TrustInSoft)
 
-    * Fix length checking for AEAD ciphersuites (found by Codenomicon).
 
-      It was possible to crash the server (and client) using crafted messages
 
-      when a GCM suite was chosen.
 
- Bugfix
 
-    * Fixed X.509 hostname comparison (with non-regular characters)
 
-    * SSL now gracefully handles missing RNG
 
-    * crypt_and_hash app checks MAC before final decryption
 
-    * Fixed x509_crt_parse_path() bug on Windows platforms
 
-    * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
 
-      TrustInSoft)
 
-    * Fixed potential overflow in certificate size verification in
 
-      ssl_write_certificate() (found by TrustInSoft)
 
-    * Fix ASM format in bn_mul.h
 
-    * Potential memory leak in bignum_selftest()
 
-    * Replaced expired test certificate
 
-    * ssl_mail_client now terminates lines with CRLF, instead of LF
 
-    * Fix bug in RSA PKCS#1 v1.5 "reversed" operations
 
-    * Fixed testing with out-of-source builds using cmake
 
-    * Fixed version-major intolerance in server
 
-    * Fixed CMake symlinking on out-of-source builds
 
-    * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
 
-      Alex Wilson.)
 
-    * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
 
-      out_ctr failed
 
-    * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
 
-      of one of them failed
 
-    * x509_get_current_time() uses localtime_r() to prevent thread issues
 
-    * Some example server programs were not sending the close_notify alert.
 
-    * Potential memory leak in mpi_exp_mod() when error occurs during
 
-      calculation of RR.
 
-    * Improve interoperability by not writing extension length in ClientHello
 
-      when no extensions are present (found by Matthew Page)
 
-    * rsa_check_pubkey() now allows an E up to N
 
-    * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
 
-    * mpi_fill_random() was creating numbers larger than requested on
 
-      big-endian platform when size was not an integer number of limbs
 
-    * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
 
-    * Stricter check on SSL ClientHello internal sizes compared to actual packet
 
-      size (found by TrustInSoft)
 
-    * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
 
-    * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
 
-      interpret semicolons as comment delimiters (found by Barry K. Nathan).
 
-    * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
 
-    * Fix base64_decode() to return and check length correctly (in case of
 
-      tight buffers)
 
- = Version 1.2.10 released 2013-10-07
 
- Changes
 
-    * Changed RSA blinding to a slower but thread-safe version
 
- Bugfix
 
-    * Fixed memory leak in RSA as a result of introduction of blinding
 
-    * Fixed ssl_pkcs11_decrypt() prototype
 
-    * Fixed MSVC project files
 
- = Version 1.2.9 released 2013-10-01
 
- Changes
 
-    * x509_verify() now case insensitive for cn (RFC 6125 6.4)
 
- Bugfix
 
-    * Fixed potential memory leak when failing to resume a session
 
-    * Fixed potential file descriptor leaks (found by Remi Gacogne)
 
-    * Minor fixes
 
- Security
 
-    * Fixed potential heap buffer overflow on large hostname setting
 
-    * Fixed potential negative value misinterpretation in load_file()
 
-    * RSA blinding on CRT operations to counter timing attacks
 
-      (found by Cyril Arnaud and Pierre-Alain Fouque)
 
- = Version 1.2.8 released 2013-06-19
 
- Features
 
-    * Parsing of PKCS#8 encrypted private key files
 
-    * PKCS#12 PBE and derivation functions
 
-    * Centralized module option values in config.h to allow user-defined
 
-      settings without editing header files by using POLARSSL_CONFIG_OPTIONS
 
- Changes
 
-    * HAVEGE random generator disabled by default
 
-    * Internally split up x509parse_key() into a (PEM) handler function
 
-      and specific DER parser functions for the PKCS#1 and unencrypted
 
-      PKCS#8 private key formats
 
-    * Added mechanism to provide alternative implementations for all
 
-      symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in
 
-      config.h)
 
-    * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated
 
-      old PBKDF2 module
 
- Bugfix
 
-    * Secure renegotiation extension should only be sent in case client
 
-      supports secure renegotiation
 
-    * Fixed offset for cert_type list in ssl_parse_certificate_request()
 
-    * Fixed const correctness issues that have no impact on the ABI
 
-    * x509parse_crt() now better handles PEM error situations
 
-    * ssl_parse_certificate() now calls x509parse_crt_der() directly
 
-      instead of the x509parse_crt() wrapper that can also parse PEM
 
-      certificates
 
-    * x509parse_crtpath() is now reentrant and uses more portable stat()
 
-    * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler
 
-    * Fixed values for 2-key Triple DES in cipher layer
 
-    * ssl_write_certificate_request() can handle empty ca_chain
 
- Security
 
-    * A possible DoS during the SSL Handshake, due to faulty parsing of
 
-      PEM-encoded certificates has been fixed (found by Jack Lloyd)
 
- = Version 1.2.7 released 2013-04-13
 
- Features
 
-    * Ability to specify allowed ciphersuites based on the protocol version.
 
- Changes
 
-    * Default Blowfish keysize is now 128-bits
 
-    * Test suites made smaller to accommodate Raspberry Pi
 
- Bugfix
 
-    * Fix for MPI assembly for ARM
 
-    * GCM adapted to support sizes > 2^29
 
- = Version 1.2.6 released 2013-03-11
 
- Bugfix
 
-    * Fixed memory leak in ssl_free() and ssl_reset() for active session
 
-    * Corrected GCM counter incrementation to use only 32-bits instead of
 
-      128-bits (found by Yawning Angel)
 
-    * Fixes for 64-bit compilation with MS Visual Studio
 
-    * Fixed net_bind() for specified IP addresses on little endian systems
 
-    * Fixed assembly code for ARM (Thumb and regular) for some compilers
 
- Changes
 
-    * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(),
 
-      rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and
 
-      PKCS#1 v2.1 functions
 
-    * Added support for custom labels when using rsa_rsaes_oaep_encrypt()
 
-      or rsa_rsaes_oaep_decrypt()
 
-    * Re-added handling for SSLv2 Client Hello when the define
 
-      POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set
 
-    * The SSL session cache module (ssl_cache) now also retains peer_cert
 
-      information (not the entire chain)
 
- Security
 
-    * Removed further timing differences during SSL message decryption in
 
-      ssl_decrypt_buf()
 
-    * Removed timing differences due to bad padding from
 
-      rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
 
-      operations
 
- = Version 1.2.5 released 2013-02-02
 
- Changes
 
-    * Allow enabling of dummy error_strerror() to support some use-cases
 
-    * Debug messages about padding errors during SSL message decryption are
 
-      disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
 
-    * Sending of security-relevant alert messages that do not break
 
-      interoperability can be switched on/off with the flag
 
-      POLARSSL_SSL_ALL_ALERT_MESSAGES
 
- Security
 
-    * Removed timing differences during SSL message decryption in
 
-      ssl_decrypt_buf() due to badly formatted padding
 
- = Version 1.2.4 released 2013-01-25
 
- Changes
 
-    * More advanced SSL ciphersuite representation and moved to more dynamic
 
-      SSL core
 
-    * Added ssl_handshake_step() to allow single stepping the handshake process
 
- Bugfix
 
-    * Memory leak when using RSA_PKCS_V21 operations fixed
 
-    * Handle future version properly in ssl_write_certificate_request()
 
-    * Correctly handle CertificateRequest message in client for <= TLS 1.1
 
-      without DN list
 
- = Version 1.2.3 released 2012-11-26
 
- Bugfix
 
-    * Server not always sending correct CertificateRequest message
 
- = Version 1.2.2 released 2012-11-24
 
- Changes
 
-    * Added p_hw_data to ssl_context for context specific hardware acceleration
 
-      data
 
-    * During verify trust-CA is only checked for expiration and CRL presence
 
- Bugfixes
 
-    * Fixed client authentication compatibility
 
-    * Fixed dependency on POLARSSL_SHA4_C in SSL modules
 
- = Version 1.2.1 released 2012-11-20
 
- Changes
 
-    * Depth that the certificate verify callback receives is now numbered
 
-      bottom-up (Peer cert depth is 0)
 
- Bugfixes
 
-    * Fixes for MSVC6
 
-    * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
 
-    * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
 
-      Pégourié-Gonnard)
 
-    * Fixed possible segfault in mpi_shift_r() (found by Manuel
 
-      Pégourié-Gonnard)
 
-    * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
 
- = Version 1.2.0 released 2012-10-31
 
- Features
 
-    * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak
 
-      ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by
 
-      default!
 
-    * Added support for wildcard certificates
 
-    * Added support for multi-domain certificates through the X509 Subject
 
-      Alternative Name extension
 
-    * Added preliminary ASN.1 buffer writing support
 
-    * Added preliminary X509 Certificate Request writing support
 
-    * Added key_app_writer example application
 
-    * Added cert_req example application
 
-    * Added base Galois Counter Mode (GCM) for AES
 
-    * Added TLS 1.2 support (RFC 5246)
 
-    * Added GCM suites to TLS 1.2 (RFC 5288)
 
-    * Added commandline error code convertor (util/strerror)
 
-    * Added support for Hardware Acceleration hooking in SSL/TLS
 
-    * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and
 
-      example application (programs/ssl/o_p_test) (requires OpenSSL)
 
-    * Added X509 CA Path support
 
-    * Added Thumb assembly optimizations
 
-    * Added DEFLATE compression support as per RFC3749 (requires zlib)
 
-    * Added blowfish algorithm (Generic and cipher layer)
 
-    * Added PKCS#5 PBKDF2 key derivation function
 
-    * Added Secure Renegotiation (RFC 5746)
 
-    * Added predefined DHM groups from RFC 5114
 
-    * Added simple SSL session cache implementation
 
-    * Added ServerName extension parsing (SNI) at server side
 
-    * Added option to add minimum accepted SSL/TLS protocol version
 
- Changes
 
-    * Removed redundant POLARSSL_DEBUG_MSG define
 
-    * AES code only check for Padlock once
 
-    * Fixed const-correctness mpi_get_bit()
 
-    * Documentation for mpi_lsb() and mpi_msb()
 
-    * Moved out_msg to out_hdr + 32 to support hardware acceleration
 
-    * Changed certificate verify behaviour to comply with RFC 6125 section 6.3
 
-      to not match CN if subjectAltName extension is present (Closes ticket #56)
 
-    * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to
 
-      POLARSSL_MODE_CFB, to also handle different block size CFB modes.
 
-    * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation)
 
-    * Revamped session resumption handling
 
-    * Generalized external private key implementation handling (like PKCS#11)
 
-      in SSL/TLS
 
-    * Revamped x509_verify() and the SSL f_vrfy callback implementations
 
-    * Moved from unsigned long to fixed width uint32_t types throughout code
 
-    * Renamed ciphersuites naming scheme to IANA reserved names
 
- Bugfix
 
-    * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
 
-      Hui Dong)
 
-    * Fixed potential heap corruption in x509_name allocation
 
-    * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
 
-    * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
 
-      #52)
 
-    * Handle encryption with private key and decryption with public key as per
 
-      RFC 2313
 
-    * Handle empty certificate subject names
 
-    * Prevent reading over buffer boundaries on X509 certificate parsing
 
-    * mpi_add_abs() now correctly handles adding short numbers to long numbers
 
-      with carry rollover (found by Ruslan Yushchenko)
 
-    * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
 
-    * Fixed MPI assembly for SPARC64 platform
 
- Security
 
-    * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
 
-      Vanderbeken)
 
- = Version 1.1.8 released on 2013-10-01
 
- Bugfix
 
-    * Fixed potential memory leak when failing to resume a session
 
-    * Fixed potential file descriptor leaks
 
- Security
 
-    * Potential buffer-overflow for ssl_read_record() (independently found by
 
-      both TrustInSoft and Paul Brodeur of Leviathan Security Group)
 
-    * Potential negative value misinterpretation in load_file()
 
-    * Potential heap buffer overflow on large hostname setting
 
- = Version 1.1.7 released on 2013-06-19
 
- Changes
 
-    * HAVEGE random generator disabled by default
 
- Bugfix
 
-    * x509parse_crt() now better handles PEM error situations
 
-    * ssl_parse_certificate() now calls x509parse_crt_der() directly
 
-      instead of the x509parse_crt() wrapper that can also parse PEM
 
-      certificates
 
-    * Fixed values for 2-key Triple DES in cipher layer
 
-    * ssl_write_certificate_request() can handle empty ca_chain
 
- Security
 
-    * A possible DoS during the SSL Handshake, due to faulty parsing of
 
-      PEM-encoded certificates has been fixed (found by Jack Lloyd)
 
- = Version 1.1.6 released on 2013-03-11
 
- Bugfix
 
-    * Fixed net_bind() for specified IP addresses on little endian systems
 
- Changes
 
-    * Allow enabling of dummy error_strerror() to support some use-cases
 
-    * Debug messages about padding errors during SSL message decryption are
 
-      disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
 
- Security
 
-    * Removed timing differences during SSL message decryption in
 
-      ssl_decrypt_buf()
 
-    * Removed timing differences due to bad padding from
 
-      rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
 
-      operations
 
- = Version 1.1.5 released on 2013-01-16
 
- Bugfix
 
-    * Fixed MPI assembly for SPARC64 platform
 
-    * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
 
-    * mpi_add_abs() now correctly handles adding short numbers to long numbers
 
-      with carry rollover
 
-    * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
 
-    * Prevent reading over buffer boundaries on X509 certificate parsing
 
-    * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
 
-      #52)
 
-    * Fixed possible segfault in mpi_shift_r() (found by Manuel
 
-      Pégourié-Gonnard)
 
-    * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
 
-      Pégourié-Gonnard)
 
-    * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
 
-    * Memory leak when using RSA_PKCS_V21 operations fixed
 
-    * Handle encryption with private key and decryption with public key as per
 
-      RFC 2313
 
-    * Fixes for MSVC6
 
- Security
 
-    * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
 
-      Vanderbeken)
 
- = Version 1.1.4 released on 2012-05-31
 
- Bugfix
 
-    * Correctly handle empty SSL/TLS packets (Found by James Yonan)
 
-    * Fixed potential heap corruption in x509_name allocation
 
-    * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
 
- = Version 1.1.3 released on 2012-04-29
 
- Bugfix
 
-    * Fixed random MPI generation to not generate more size than requested.
 
- = Version 1.1.2 released on 2012-04-26
 
- Bugfix
 
-    * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
 
-      Hui Dong)
 
- Security
 
-    * Fixed potential memory corruption on miscrafted client messages (found by
 
-      Frama-C team at CEA LIST)
 
-    * Fixed generation of DHM parameters to correct length (found by Ruslan
 
-      Yushchenko)
 
- = Version 1.1.1 released on 2012-01-23
 
- Bugfix
 
-    * Check for failed malloc() in ssl_set_hostname() and x509_get_entries()
 
-      (Closes ticket #47, found by Hugo Leisink)
 
-    * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50)
 
-    * Fixed multiple compiler warnings for VS6 and armcc
 
-    * Fixed bug in CTR_CRBG selftest
 
- = Version 1.1.0 released on 2011-12-22
 
- Features
 
-    * Added ssl_session_reset() to allow better multi-connection pools of
 
-      SSL contexts without needing to set all non-connection-specific
 
-      data and pointers again. Adapted ssl_server to use this functionality.
 
-    * Added ssl_set_max_version() to allow clients to offer a lower maximum
 
-      supported version to a server to help buggy server implementations.
 
-      (Closes ticket #36)
 
-    * Added cipher_get_cipher_mode() and cipher_get_cipher_operation()
 
-      introspection functions (Closes ticket #40)
 
-    * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator
 
-    * Added a generic entropy accumulator that provides support for adding
 
-      custom entropy sources and added some generic and platform dependent
 
-      entropy sources
 
- Changes
 
-    * Documentation for AES and Camellia in modes CTR and CFB128 clarified.
 
-    * Fixed rsa_encrypt and rsa_decrypt examples to use public key for
 
-      encryption and private key for decryption. (Closes ticket #34)
 
-    * Inceased maximum size of ASN1 length reads to 32-bits.
 
-    * Added an EXPLICIT tag number parameter to x509_get_ext()
 
-    * Added a separate CRL entry extension parsing function
 
-    * Separated the ASN.1 parsing code from the X.509 specific parsing code.
 
-      So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C.
 
-    * Changed the defined key-length of DES ciphers in cipher.h to include the
 
-      parity bits, to prevent mistakes in copying data. (Closes ticket #33)
 
-    * Loads of minimal changes to better support WINCE as a build target
 
-      (Credits go to Marco Lizza)
 
-    * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory
 
-      trade-off
 
-    * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size
 
-      management (Closes ticket #44)
 
-    * Changed the used random function pointer to more flexible format. Renamed
 
-      havege_rand() to havege_random() to prevent mistakes. Lots of changes as
 
-      a consequence in library code and programs
 
-    * Moved all examples programs to use the new entropy and CTR_DRBG
 
-    * Added permissive certificate parsing to x509parse_crt() and
 
-      x509parse_crtfile(). With permissive parsing the parsing does not stop on
 
-      encountering a parse-error. Beware that the meaning of return values has
 
-      changed!
 
-    * All error codes are now negative. Even on mermory failures and IO errors.
 
- Bugfix
 
-    * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes
 
-      ticket #37)
 
-    * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag
 
-      before version numbers
 
-    * Allowed X509 key usage parsing to accept 4 byte values instead of the
 
-      standard 1 byte version sometimes used by Microsoft. (Closes ticket #38)
 
-    * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length
 
-      smaller than the hash length. (Closes ticket #41)
 
-    * If certificate serial is longer than 32 octets, serial number is now
 
-      appended with '....' after first 28 octets
 
-    * Improved build support for s390x and sparc64 in bignum.h
 
-    * Fixed MS Visual C++ name clash with int64 in sha4.h
 
-    * Corrected removal of leading "00:" in printing serial numbers in
 
-      certificates and CRLs
 
- = Version 1.0.0 released on 2011-07-27
 
- Features
 
-    * Expanded cipher layer with support for CFB128 and CTR mode
 
-    * Added rsa_encrypt and rsa_decrypt simple example programs.
 
- Changes
 
-    * The generic cipher and message digest layer now have normal error
 
-      codes instead of integers
 
- Bugfix
 
-    * Undid faulty bug fix in ssl_write() when flushing old data (Ticket
 
-      #18)
 
- = Version 0.99-pre5 released on 2011-05-26
 
- Features
 
-    * Added additional Cipher Block Modes to symmetric ciphers
 
-      (AES CTR, Camellia CTR, XTEA CBC) including the option to
 
-      enable and disable individual modes when needed
 
-    * Functions requiring File System functions can now be disabled
 
-      by undefining POLARSSL_FS_IO
 
-    * A error_strerror function() has been added to translate between
 
-      error codes and their description.
 
-    * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter
 
-      functions.
 
-    * Added ssl_mail_client and ssl_fork_server as example programs.
 
- Changes
 
-    * Major argument / variable rewrite. Introduced use of size_t
 
-      instead of int for buffer lengths and loop variables for
 
-      better unsigned / signed use. Renamed internal bigint types
 
-      t_int and t_dbl to t_uint and t_udbl in the process
 
-    * mpi_init() and mpi_free() now only accept a single MPI
 
-      argument and do not accept variable argument lists anymore.
 
-    * The error codes have been remapped and combining error codes
 
-      is now done with a PLUS instead of an OR as error codes
 
-      used are negative.
 
-    * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv().
 
-      net_recv() now returns 0 on EOF instead of
 
-      POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns
 
-      POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function.
 
-      ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received
 
-      after the handshake.
 
-    * Network functions now return POLARSSL_ERR_NET_WANT_READ or
 
-      POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous
 
-      POLARSSL_ERR_NET_TRY_AGAIN
 
- = Version 0.99-pre4 released on 2011-04-01
 
- Features
 
-    * Added support for PKCS#1 v2.1 encoding and thus support
 
-      for the RSAES-OAEP and RSASSA-PSS operations.
 
-    * Reading of Public Key files incorporated into default x509
 
-      functionality as well.
 
-    * Added mpi_fill_random() for centralized filling of big numbers
 
-      with random data (Fixed ticket #10)
 
- Changes
 
-    * Debug print of MPI now removes leading zero octets and
 
-      displays actual bit size of the value.
 
-    * x509parse_key() (and as a consequence x509parse_keyfile())
 
-      does not zeroize memory in advance anymore. Use rsa_init()
 
-      before parsing a key or keyfile!
 
- Bugfix
 
-    * Debug output of MPI's now the same independent of underlying
 
-      platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads
 
-      Kiilerich and Mihai Militaru)
 
-    * Fixed bug in ssl_write() when flushing old data (Fixed ticket
 
-      #18, found by Nikolay Epifanov)
 
-    * Fixed proper handling of RSASSA-PSS verification with variable
 
-      length salt lengths
 
- = Version 0.99-pre3 released on 2011-02-28
 
- This release replaces version 0.99-pre2 which had possible copyright issues.
 
- Features
 
-    * Parsing PEM private keys encrypted with DES and AES
 
-      are now supported as well (Fixes ticket #5)
 
-    * Added crl_app program to allow easy reading and
 
-      printing of X509 CRLs from file
 
- Changes
 
-    * Parsing of PEM files moved to separate module (Fixes
 
-      ticket #13). Also possible to remove PEM support for
 
-      systems only using DER encoding
 
- Bugfixes
 
-    * Corrected parsing of UTCTime dates before 1990 and
 
-      after 1950
 
-    * Support more exotic OID's when parsing certificates
 
-      (found by Mads Kiilerich)
 
-    * Support more exotic name representations when parsing
 
-      certificates (found by Mads Kiilerich)
 
-    * Replaced the expired test certificates
 
-    * Do not bail out if no client certificate specified. Try
 
-      to negotiate anonymous connection (Fixes ticket #12,
 
-      found by Boris Krasnovskiy)
 
- Security fixes
 
-    * Fixed a possible Man-in-the-Middle attack on the
 
-      Diffie Hellman key exchange (thanks to Larry Highsmith,
 
-      Subreption LLC)
 
- = Version 0.99-pre1 released on 2011-01-30
 
- Features
 
- Note: Most of these features have been donated by Fox-IT
 
-    * Added Doxygen source code documentation parts
 
-    * Added reading of DHM context from memory and file
 
-    * Improved X509 certificate parsing to include extended
 
-      certificate fields, including Key Usage
 
-    * Improved certificate verification and verification
 
-      against the available CRLs
 
-    * Detection for DES weak keys and parity bits added
 
-    * Improvements to support integration in other
 
-      applications:
 
-        + Added generic message digest and cipher wrapper
 
-        + Improved information about current capabilities,
 
-          status, objects and configuration
 
-        + Added verification callback on certificate chain
 
-          verification to allow external blacklisting
 
-        + Additional example programs to show usage
 
-    * Added support for PKCS#11 through the use of the
 
-      libpkcs11-helper library
 
- Changes
 
-    * x509parse_time_expired() checks time in addition to
 
-      the existing date check
 
-    * The ciphers member of ssl_context and the cipher member
 
-      of ssl_session have been renamed to ciphersuites and
 
-      ciphersuite respectively. This clarifies the difference
 
-      with the generic cipher layer and is better naming
 
-      altogether
 
- = Version 0.14.0 released on 2010-08-16
 
- Features
 
-    * Added support for SSL_EDH_RSA_AES_128_SHA and
 
-      SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites
 
-    * Added compile-time and run-time version information
 
-    * Expanded ssl_client2 arguments for more flexibility
 
-    * Added support for TLS v1.1
 
- Changes
 
-    * Made Makefile cleaner
 
-    * Removed dependency on rand() in rsa_pkcs1_encrypt().
 
-      Now using random fuction provided to function and
 
-      changed the prototype of rsa_pkcs1_encrypt(),
 
-      rsa_init() and rsa_gen_key().
 
-    * Some SSL defines were renamed in order to avoid
 
-      future confusion
 
- Bug fixes
 
-    * Fixed CMake out of source build for tests (found by
 
-      kkert)
 
-    * rsa_check_private() now supports PKCS1v2 keys as well
 
-    * Fixed deadlock in rsa_pkcs1_encrypt() on failing random
 
-      generator
 
- = Version 0.13.1 released on 2010-03-24
 
- Bug fixes
 
-    * Fixed Makefile in library that was mistakenly merged
 
-    * Added missing const string fixes
 
- = Version 0.13.0 released on 2010-03-21
 
- Features
 
-    * Added option parsing for host and port selection to
 
-      ssl_client2
 
-    * Added support for GeneralizedTime in X509 parsing
 
-    * Added cert_app program to allow easy reading and
 
-      printing of X509 certificates from file or SSL
 
-      connection.
 
- Changes
 
-    * Added const correctness for main code base
 
-    * X509 signature algorithm determination is now
 
-      in a function to allow easy future expansion
 
-    * Changed symmetric cipher functions to
 
-      identical interface (returning int result values)
 
-    * Changed ARC4 to use separate input/output buffer
 
-    * Added reset function for HMAC context as speed-up
 
-      for specific use-cases
 
- Bug fixes
 
-    * Fixed bug resulting in failure to send the last
 
-      certificate in the chain in ssl_write_certificate() and
 
-      ssl_write_certificate_request() (found by fatbob)
 
-    * Added small fixes for compiler warnings on a Mac
 
-      (found by Frank de Brabander)
 
-    * Fixed algorithmic bug in mpi_is_prime() (found by
 
-      Smbat Tonoyan)
 
- = Version 0.12.1 released on 2009-10-04
 
- Changes
 
-    * Coverage test definitions now support 'depends_on'
 
-      tagging system.
 
-    * Tests requiring specific hashing algorithms now honor
 
-      the defines.
 
- Bug fixes
 
-    * Changed typo in #ifdef in x509parse.c (found
 
-      by Eduardo)
 
- = Version 0.12.0 released on 2009-07-28
 
- Features
 
-    * Added CMake makefiles as alternative to regular Makefiles.
 
-    * Added preliminary Code Coverage tests for AES, ARC4,
 
-      Base64, MPI, SHA-family, MD-family, HMAC-SHA-family,
 
-      Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman
 
-      and X509parse.
 
- Changes
 
-    * Error codes are not (necessarily) negative. Keep
 
-      this is mind when checking for errors.
 
-    * RSA_RAW renamed to SIG_RSA_RAW for consistency.
 
-    * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE.
 
-    * Changed interface for AES and Camellia setkey functions
 
-      to indicate invalid key lengths.
 
- Bug fixes
 
-    * Fixed include location of endian.h on FreeBSD (found by
 
-      Gabriel)
 
-    * Fixed include location of endian.h and name clash on
 
-      Apples (found by Martin van Hensbergen)
 
-    * Fixed HMAC-MD2 by modifying md2_starts(), so that the
 
-      required HMAC ipad and opad variables are not cleared.
 
-      (found by code coverage tests)
 
-    * Prevented use of long long in bignum if
 
-      POLARSSL_HAVE_LONGLONG not defined (found by Giles
 
-      Bathgate).
 
-    * Fixed incorrect handling of negative strings in
 
-      mpi_read_string() (found by code coverage tests).
 
-    * Fixed segfault on handling empty rsa_context in
 
-      rsa_check_pubkey() and rsa_check_privkey() (found by
 
-      code coverage tests).
 
-    * Fixed incorrect handling of one single negative input
 
-      value in mpi_add_abs() (found by code coverage tests).
 
-    * Fixed incorrect handling of negative first input
 
-      value in mpi_sub_abs() (found by code coverage tests).
 
-    * Fixed incorrect handling of negative first input
 
-      value in mpi_mod_mpi() and mpi_mod_int(). Resulting
 
-      change also affects mpi_write_string() (found by code
 
-      coverage tests).
 
-    * Corrected is_prime() results for 0, 1 and 2 (found by
 
-      code coverage tests).
 
-    * Fixed Camellia and XTEA for 64-bit Windows systems.
 
- = Version 0.11.1 released on 2009-05-17
 
-    * Fixed missing functionality for SHA-224, SHA-256, SHA384,
 
-      SHA-512 in rsa_pkcs1_sign()
 
- = Version 0.11.0 released on 2009-05-03
 
-    * Fixed a bug in mpi_gcd() so that it also works when both
 
-      input numbers are even and added testcases to check
 
-      (found by Pierre Habouzit).
 
-    * Added support for SHA-224, SHA-256, SHA-384 and SHA-512
 
-      one way hash functions with the PKCS#1 v1.5 signing and
 
-      verification.
 
-    * Fixed minor bug regarding mpi_gcd located within the
 
-      POLARSSL_GENPRIME block.
 
-    * Fixed minor memory leak in x509parse_crt() and added better
 
-      handling of 'full' certificate chains (found by Mathias
 
-      Olsson).
 
-    * Centralized file opening and reading for x509 files into
 
-      load_file()
 
-    * Made definition of net_htons() endian-clean for big endian
 
-      systems (Found by Gernot).
 
-    * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in
 
-      padlock and timing code.
 
-    * Fixed an off-by-one buffer allocation in ssl_set_hostname()
 
-      responsible for crashes and unwanted behaviour.
 
-    * Added support for Certificate Revocation List (CRL) parsing.
 
-    * Added support for CRL revocation to x509parse_verify() and
 
-      SSL/TLS code.
 
-    * Fixed compatibility of XTEA and Camellia on a 64-bit system
 
-      (found by Felix von Leitner).
 
- = Version 0.10.0 released on 2009-01-12
 
-    * Migrated XySSL to PolarSSL
 
-    * Added XTEA symmetric cipher
 
-    * Added Camellia symmetric cipher
 
-    * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA,
 
-      SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA
 
-    * Fixed dangerous bug that can cause a heap overflow in
 
-      rsa_pkcs1_decrypt (found by Christophe Devine)
 
- ================================================================
 
- XySSL ChangeLog
 
- = Version 0.9 released on 2008-03-16
 
-     * Added support for ciphersuite: SSL_RSA_AES_128_SHA
 
-     * Enabled support for large files by default in aescrypt2.c
 
-     * Preliminary openssl wrapper contributed by David Barrett
 
-     * Fixed a bug in ssl_write() that caused the same payload to
 
-       be sent twice in non-blocking mode when send returns EAGAIN
 
-     * Fixed ssl_parse_client_hello(): session id and challenge must
 
-       not be swapped in the SSLv2 ClientHello (found by Greg Robson)
 
-     * Added user-defined callback debug function (Krystian Kolodziej)
 
-     * Before freeing a certificate, properly zero out all cert. data
 
-     * Fixed the "mode" parameter so that encryption/decryption are
 
-       not swapped on PadLock; also fixed compilation on older versions
 
-       of gcc (bug reported by David Barrett)
 
-     * Correctly handle the case in padlock_xcryptcbc() when input or
 
-       output data is non-aligned by falling back to the software
 
-       implementation, as VIA Nehemiah cannot handle non-aligned buffers
 
-     * Fixed a memory leak in x509parse_crt() which was reported by Greg
 
-       Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to
 
-       Matthew Page who reported several bugs
 
-     * Fixed x509_get_ext() to accept some rare certificates which have
 
-       an INTEGER instead of a BOOLEAN for BasicConstraints::cA.
 
-     * Added support on the client side for the TLS "hostname" extension
 
-       (patch contributed by David Patino)
 
-     * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty
 
-       string is passed as the CN (bug reported by spoofy)
 
-     * Added an option to enable/disable the BN assembly code
 
-     * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1)
 
-     * Disabled obsolete hash functions by default (MD2, MD4); updated
 
-       selftest and benchmark to not test ciphers that have been disabled
 
-     * Updated x509parse_cert_info() to correctly display byte 0 of the
 
-       serial number, setup correct server port in the ssl client example
 
-     * Fixed a critical denial-of-service with X.509 cert. verification:
 
-       peer may cause xyssl to loop indefinitely by sending a certificate
 
-       for which the RSA signature check fails (bug reported by Benoit)
 
-     * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC,
 
-       HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512
 
-     * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin)
 
-     * Modified ssl_parse_client_key_exchange() to protect against
 
-       Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well
 
-       as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack
 
-     * Updated rsa_gen_key() so that ctx->N is always nbits in size
 
-     * Fixed assembly PPC compilation errors on Mac OS X, thanks to
 
-       David Barrett and Dusan Semen
 
- = Version 0.8 released on 2007-10-20
 
-     * Modified the HMAC functions to handle keys larger
 
-       than 64 bytes, thanks to Stephane Desneux and gary ng
 
-     * Fixed ssl_read_record() to properly update the handshake
 
-       message digests, which fixes IE6/IE7 client authentication
 
-     * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten
 
-     * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan
 
-     * Added user-defined callbacks for handling I/O and sessions
 
-     * Added lots of debugging output in the SSL/TLS functions
 
-     * Added preliminary X.509 cert. writing by Pascal Vizeli
 
-     * Added preliminary support for the VIA PadLock routines
 
-     * Added AES-CFB mode of operation, contributed by chmike
 
-     * Added an SSL/TLS stress testing program (ssl_test.c)
 
-     * Updated the RSA PKCS#1 code to allow choosing between
 
-       RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett
 
-     * Updated ssl_read() to skip 0-length records from OpenSSL
 
-     * Fixed the make install target to comply with *BSD make
 
-     * Fixed a bug in mpi_read_binary() on 64-bit platforms
 
-     * mpi_is_prime() speedups, thanks to Kevin McLaughlin
 
-     * Fixed a long standing memory leak in mpi_is_prime()
 
-     * Replaced realloc with malloc in mpi_grow(), and set
 
-       the sign of zero as positive in mpi_init() (reported
 
-       by Jonathan M. McCune)
 
- = Version 0.7 released on 2007-07-07
 
-     * Added support for the MicroBlaze soft-core processor
 
-     * Fixed a bug in ssl_tls.c which sometimes prevented SSL
 
-       connections from being established with non-blocking I/O
 
-     * Fixed a couple bugs in the VS6 and UNIX Makefiles
 
-     * Fixed the "PIC register ebx clobbered in asm" bug
 
-     * Added HMAC starts/update/finish support functions
 
-     * Added the SHA-224, SHA-384 and SHA-512 hash functions
 
-     * Fixed the net_set_*block routines, thanks to Andreas
 
-     * Added a few demonstration programs: md5sum, sha1sum,
 
-       dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify
 
-     * Added new bignum import and export helper functions
 
-     * Rewrote README.txt in program/ssl/ca to better explain
 
-       how to create a test PKI
 
- = Version 0.6 released on 2007-04-01
 
-     * Ciphers used in SSL/TLS can now be disabled at compile
 
-       time, to reduce the memory footprint on embedded systems
 
-     * Added multiply assembly code for the TriCore and modified
 
-       havege_struct for this processor, thanks to David Patiño
 
-     * Added multiply assembly code for 64-bit PowerPCs,
 
-       thanks to Peking University and the OSU Open Source Lab
 
-     * Added experimental support of Quantum Cryptography
 
-     * Added support for autoconf, contributed by Arnaud Cornet
 
-     * Fixed "long long" compilation issues on IA-64 and PPC64
 
-     * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock
 
-       was not being correctly defined on ARM and MIPS
 
- = Version 0.5 released on 2007-03-01
 
-     * Added multiply assembly code for SPARC and Alpha
 
-     * Added (beta) support for non-blocking I/O operations
 
-     * Implemented session resuming and client authentication
 
-     * Fixed some portability issues on WinCE, MINIX 3, Plan9
 
-       (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris
 
-     * Improved the performance of the EDH key exchange
 
-     * Fixed a bug that caused valid packets with a payload
 
-       size of 16384 bytes to be rejected
 
- = Version 0.4 released on 2007-02-01
 
-     * Added support for Ephemeral Diffie-Hellman key exchange
 
-     * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K
 
-     * Various improvement to the modular exponentiation code
 
-     * Rewrote the headers to generate the API docs with doxygen
 
-     * Fixed a bug in ssl_encrypt_buf (incorrect padding was
 
-       generated) and in ssl_parse_client_hello (max. client
 
-       version was not properly set), thanks to Didier Rebeix
 
-     * Fixed another bug in ssl_parse_client_hello: clients with
 
-       cipherlists larger than 96 bytes were incorrectly rejected
 
-     * Fixed a couple memory leak in x509_read.c
 
- = Version 0.3 released on 2007-01-01
 
-     * Added server-side SSLv3 and TLSv1.0 support
 
-     * Multiple fixes to enhance the compatibility with g++,
 
-       thanks to Xosé Antón Otero Ferreira
 
-     * Fixed a bug in the CBC code, thanks to dowst; also,
 
-       the bignum code is no longer dependent on long long
 
-     * Updated rsa_pkcs1_sign to handle arbitrary large inputs
 
-     * Updated timing.c for improved compatibility with i386
 
-       and 486 processors, thanks to Arnaud Cornet
 
- = Version 0.2 released on 2006-12-01
 
-     * Updated timing.c to support ARM and MIPS arch
 
-     * Updated the MPI code to support 8086 on MSVC 1.5
 
-     * Added the copyright notice at the top of havege.h
 
-     * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang
 
-     * Fixed a bug reported by Adrian Rüegsegger in x509_read_key
 
-     * Fixed a bug reported by Torsten Lauter in ssl_read_record
 
-     * Fixed a bug in rsa_check_privkey that would wrongly cause
 
-       valid RSA keys to be dismissed (thanks to oldwolf)
 
-     * Fixed a bug in mpi_is_prime that caused some primes to fail
 
-       the Miller-Rabin primality test
 
-     I'd also like to thank Younès Hafri for the CRUX linux port,
 
-     Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet
 
-     who maintains the Debian package :-)
 
- = Version 0.1 released on 2006-11-01
 
 
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