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- #include <stdint.h>
- #include <stdio.h>
- #include <string.h>
- #include "nordic_common.h"
- #include "app_timer.h"
- #include "app_util.h"
- #include "nrf_log.h"
- #include "nrf_drv_rng.h"
- #include "ecc.h"
- #include "uECC.h"
- static int ecc_rng(uint8_t *dest, unsigned size)
- {
- nrf_drv_rng_block_rand(dest, (uint32_t) size);
- return 1;
- }
- void ecc_init(bool rng)
- {
- if (rng)
- {
- uECC_set_rng(ecc_rng);
- }
- }
- ret_code_t ecc_p256_keypair_gen(uint8_t *p_le_sk, uint8_t *p_le_pk)
- {
- const struct uECC_Curve_t * p_curve;
- if (!p_le_sk || !p_le_pk)
- {
- return NRF_ERROR_NULL;
- }
- if (!is_word_aligned(p_le_sk) || !is_word_aligned(p_le_pk))
- {
- return NRF_ERROR_INVALID_ADDR;
- }
- p_curve = uECC_secp256r1();
- int ret = uECC_make_key((uint8_t *) p_le_pk, (uint8_t *) p_le_sk, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INTERNAL;
- }
- return NRF_SUCCESS;
- }
- ret_code_t ecc_p256_public_key_compute(uint8_t const *p_le_sk, uint8_t *p_le_pk)
- {
- const struct uECC_Curve_t * p_curve;
- if (!p_le_sk || !p_le_pk)
- {
- return NRF_ERROR_NULL;
- }
- if (!is_word_aligned(p_le_sk) || !is_word_aligned(p_le_pk))
- {
- return NRF_ERROR_INVALID_ADDR;
- }
- p_curve = uECC_secp256r1();
-
- int ret = uECC_compute_public_key((uint8_t *) p_le_sk, (uint8_t *) p_le_pk, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INTERNAL;
- }
-
- return NRF_SUCCESS;
- }
- ret_code_t ecc_p256_shared_secret_compute(uint8_t const *p_le_sk, uint8_t const *p_le_pk, uint8_t *p_le_ss)
- {
- int ret;
- const struct uECC_Curve_t * p_curve;
- if (!p_le_sk || !p_le_pk || !p_le_ss)
- {
- return NRF_ERROR_NULL;
- }
- if (!is_word_aligned(p_le_sk) || !is_word_aligned(p_le_pk) || !is_word_aligned(p_le_ss))
- {
- return NRF_ERROR_INVALID_ADDR;
- }
- p_curve = uECC_secp256r1();
-
-
-
- ret = uECC_valid_public_key((uint8_t*) p_le_pk, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INTERNAL;
- }
-
-
- ret = uECC_shared_secret((uint8_t *) p_le_pk, (uint8_t *) p_le_sk, p_le_ss, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INTERNAL;
- }
-
- return NRF_SUCCESS;
- }
- ret_code_t ecc_p256_sign(uint8_t const *p_le_sk, uint8_t const * p_le_hash, uint32_t hlen, uint8_t *p_le_sig)
- {
- const struct uECC_Curve_t * p_curve;
- if (!p_le_sk || !p_le_hash || !p_le_sig)
- {
- return NRF_ERROR_NULL;
- }
- if (!is_word_aligned(p_le_sk) || !is_word_aligned(p_le_hash) || !is_word_aligned(p_le_sig))
- {
- return NRF_ERROR_INVALID_ADDR;
- }
- p_curve = uECC_secp256r1();
-
- int ret = uECC_sign((const uint8_t *) p_le_sk, (const uint8_t *) p_le_hash, (unsigned) hlen, (uint8_t *) p_le_sig, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INTERNAL;
- }
-
- return NRF_SUCCESS;
- }
- ret_code_t ecc_p256_verify(uint8_t const *p_le_pk, uint8_t const * p_le_hash, uint32_t hlen, uint8_t const *p_le_sig)
- {
- const struct uECC_Curve_t * p_curve;
- if (!p_le_pk || !p_le_hash || !p_le_sig)
- {
- return NRF_ERROR_NULL;
- }
- if (!is_word_aligned(p_le_pk) || !is_word_aligned(p_le_hash) || !is_word_aligned(p_le_sig))
- {
- return NRF_ERROR_INVALID_ADDR;
- }
- p_curve = uECC_secp256r1();
-
- int ret = uECC_verify((const uint8_t *) p_le_pk, (const uint8_t *) p_le_hash, (unsigned) hlen, (uint8_t *) p_le_sig, p_curve);
- if (!ret)
- {
- return NRF_ERROR_INVALID_DATA;
- }
-
- return NRF_SUCCESS;
- }
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