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- #include "sdk_common.h"
- #if NRF_MODULE_ENABLED(NRF_CRYPTO)
- #include "stddef.h"
- #include "nrf_log.h"
- #include "nrf_crypto_hmac.h"
- #include "nrf_crypto_hmac_shared.h"
- #include "nrf_crypto_error.h"
- #include "nrf_crypto_init.h"
- #include "nrf_crypto_mem.h"
- #include "nrf_crypto_shared.h"
- #if NRF_MODULE_ENABLED(NRF_CRYPTO_HMAC)
- #define NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE 0xBADEBA11
- static ret_code_t verify_context_valid(nrf_crypto_hmac_internal_context_t * const p_context)
- {
- if (p_context == NULL)
- {
- return NRF_ERROR_CRYPTO_CONTEXT_NULL;
- }
- else if (p_context->init_value != NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE)
- {
- return NRF_ERROR_CRYPTO_CONTEXT_NOT_INITIALIZED;
- }
- else
- {
- return NRF_SUCCESS;
- }
- }
- ret_code_t nrf_crypto_hmac_init(nrf_crypto_hmac_context_t * const p_context,
- nrf_crypto_hmac_info_t const * p_info,
- uint8_t const * p_key,
- size_t key_size)
- {
- ret_code_t err_code;
- nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context;
- VERIFY_TRUE(nrf_crypto_is_initialized(), NRF_ERROR_CRYPTO_NOT_INITIALIZED);
-
- VERIFY_TRUE(p_ctx != NULL, NRF_ERROR_CRYPTO_CONTEXT_NULL);
- VERIFY_TRUE(p_info != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
- VERIFY_TRUE(p_key != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
- VERIFY_TRUE(key_size > 0, NRF_ERROR_CRYPTO_INPUT_LENGTH);
-
- p_ctx->p_info = p_info;
-
-
- err_code = p_ctx->p_info->init_fn(p_context, p_key, key_size);
- if (err_code == NRF_SUCCESS)
- {
- p_ctx->init_value = NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE;
- }
- return err_code;
- }
- ret_code_t nrf_crypto_hmac_update(nrf_crypto_hmac_context_t * const p_context,
- uint8_t const * p_data,
- size_t data_size)
- {
- ret_code_t err_code;
-
- nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context;
-
- err_code = verify_context_valid(p_ctx);
- VERIFY_SUCCESS(err_code);
- VERIFY_TRUE(p_data != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
- VERIFY_TRUE(data_size > 0, NRF_ERROR_CRYPTO_INPUT_LENGTH);
-
- err_code = p_ctx->p_info->update_fn(p_context, p_data, data_size);
- return err_code;
- }
- ret_code_t nrf_crypto_hmac_finalize(nrf_crypto_hmac_context_t * const p_context,
- uint8_t * p_digest,
- size_t * const p_digest_size)
- {
- ret_code_t err_code;
-
- nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context;
-
- err_code = verify_context_valid(p_ctx);
- VERIFY_SUCCESS(err_code);
- VERIFY_TRUE(p_digest != NULL, NRF_ERROR_CRYPTO_OUTPUT_NULL);
- VERIFY_TRUE(*p_digest_size >= p_ctx->p_info->digest_size, NRF_ERROR_CRYPTO_OUTPUT_LENGTH);
-
- err_code = p_ctx->p_info->finalize_fn(p_context, p_digest, p_digest_size);
- return err_code;
- }
- ret_code_t nrf_crypto_hmac_calculate(nrf_crypto_hmac_context_t * const p_context,
- nrf_crypto_hmac_info_t const * p_info,
- uint8_t * p_digest,
- size_t * const p_digest_size,
- uint8_t const * p_key,
- size_t key_size,
- uint8_t const * p_data,
- size_t data_size)
- {
- ret_code_t err_code;
- nrf_crypto_hmac_context_t * p_ctx;
- void * p_allocated_context = NULL;
-
-
- VERIFY_TRUE(p_info != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
-
- if (p_context == NULL)
- {
- p_allocated_context = NRF_CRYPTO_ALLOC(p_info->context_size);
- if (p_allocated_context == NULL)
- {
- return NRF_ERROR_CRYPTO_ALLOC_FAILED;
- }
- p_ctx = (nrf_crypto_hmac_context_t *)p_allocated_context;
- }
- else
- {
- p_ctx = (nrf_crypto_hmac_context_t *)p_context;
- }
-
- err_code = nrf_crypto_hmac_init(p_ctx, p_info, p_key, key_size);
- NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context);
- err_code = nrf_crypto_hmac_update(p_ctx, p_data, data_size);
- NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context);
- err_code = nrf_crypto_hmac_finalize(p_ctx, p_digest, p_digest_size);
- NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context);
-
- if (p_allocated_context != NULL)
- {
- NRF_CRYPTO_FREE(p_allocated_context);
- }
- return err_code;
- }
- #endif
- #endif
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