text: /**
   * Copyright (c) 2018, Nordic Semiconductor ASA
   *
   *
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
   *    conditions and the following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   *
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   *
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   *
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #include "sdk_config.h"
  #include "nordic_common.h"
  
  #if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL)
  
  
  #if defined(NRF_CRYPTO_BACKEND_CC310_BL_ECC_LITTLE_ENDIAN_ENABLED)
  
  #error The configuration NRF_CRYPTO_BACKEND_CC310_BL_ECC_LITTLE_ENDIAN_ENABLED was removed in SDK 15.1.0. Please see release notes for details on removing this error message.
  
  #endif // defined(NRF_CRYPTO_BACKEND_CC310_BL_ECC_LITTLE_ENDIAN_ENABLED)
  
  
  
  #include <string.h>
  #include "app_util.h"
  #include "nrf_crypto_error.h"
  #include "nrf_crypto_mem.h"
  #include "nrf_crypto_shared.h"
  #include "cc310_bl_backend_ecdsa.h"
  #include "cc310_bl_backend_shared.h"
  #include "cc310_backend_mutex.h"
  #include "crys_ecpki_error.h"
  
  
  #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP224R1) || \
      NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP256R1)
  
  static ret_code_t crys_error_to_ret_code(CRYSError_t crys_error)
  {
      switch (crys_error)
      {
          case CRYS_OK:
              return NRF_SUCCESS;
  
          case CRYS_ECDSA_VERIFY_INCONSISTENT_VERIFY_ERROR:
              return NRF_ERROR_CRYPTO_ECDSA_INVALID_SIGNATURE;
  
          default:
              break;
      }
  
      return NRF_ERROR_CRYPTO_INTERNAL;
  }
  
  #endif
  
  
  #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP224R1)
  
  STATIC_ASSERT(offsetof(nrf_cc310_bl_ecc_signature_secp224r1_t, r) == 0,
                "Offset of r in nrf_cc310_bl_ecc_signature_secp224r1_t is unexpected");
  STATIC_ASSERT(offsetof(nrf_cc310_bl_ecc_signature_secp224r1_t, s) ==
                NRF_CRYPTO_ECC_SECP224R1_RAW_PRIVATE_KEY_SIZE,
                "Offset of s in nrf_cc310_bl_ecc_signature_secp224r1_t is unexpected");
  
  
  ret_code_t nrf_crypto_backend_secp224r1_verify(
      void           * p_context,
      void     const * p_public_key,
      uint8_t  const * p_data,
      size_t           data_size,
      uint8_t  const * p_signature)
  {
      ret_code_t  result;
      CRYSError_t crys_error;
      bool        mutex_locked;
  
      nrf_crypto_backend_secp224r1_verify_context_t * p_ctx =
          (nrf_crypto_backend_secp224r1_verify_context_t *)p_context;
  
      nrf_crypto_backend_secp224r1_public_key_t * p_pub =
          (nrf_crypto_backend_secp224r1_public_key_t *)p_public_key;
  
      p_ctx->user_context.init_val = NRF_CC310_BL_ECDSA_CONTEXT_INITIALIZED;
  
      mutex_locked = cc310_backend_mutex_trylock();
      VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY);
  
      cc310_bl_backend_enable();        
  
      crys_error = nrf_cc310_bl_ecdsa_verify_secp224r1(
          &p_ctx->user_context,
          &p_pub->public_key,
          (nrf_cc310_bl_ecc_signature_secp224r1_t const *)p_signature,
          p_data,
          data_size);
  
      cc310_bl_backend_disable();
  
      cc310_backend_mutex_unlock();
  
      result = crys_error_to_ret_code(crys_error);
  
      return result;
  }
  
  
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP224R1)
  
  
  #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP256R1)
  
  
  STATIC_ASSERT(offsetof(nrf_cc310_bl_ecc_signature_secp256r1_t, r) == 0,
                "Offset of r in nrf_cc310_bl_ecc_signature_secp256r1_t is unexpected");
  
  STATIC_ASSERT(offsetof(nrf_cc310_bl_ecc_signature_secp256r1_t, s) ==
                NRF_CRYPTO_ECC_SECP256R1_RAW_PRIVATE_KEY_SIZE,
                "Offset of s in nrf_cc310_bl_ecc_signature_secp256r1_t is unexpected");
  
  
  ret_code_t nrf_crypto_backend_secp256r1_verify(
      void           * p_context,
      void     const * p_public_key,
      uint8_t  const * p_data,
      size_t           data_size,
      uint8_t  const * p_signature)
  {
      ret_code_t  result;
      CRYSError_t crys_error;
      bool        mutex_locked;
      
  
      nrf_crypto_backend_secp256r1_verify_context_t * p_ctx =
          (nrf_crypto_backend_secp256r1_verify_context_t *)p_context;
  
      nrf_crypto_backend_secp256r1_public_key_t * p_pub =
          (nrf_crypto_backend_secp256r1_public_key_t *)p_public_key;
  
      p_ctx->user_context.init_val = NRF_CC310_BL_ECDSA_CONTEXT_INITIALIZED;
  
      mutex_locked = cc310_backend_mutex_trylock();
      VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY);
  
      cc310_bl_backend_enable();
  
      crys_error = nrf_cc310_bl_ecdsa_verify_secp256r1(
          &p_ctx->user_context,
          &p_pub->public_key,
          (nrf_cc310_bl_ecc_signature_secp256r1_t const *)p_signature,
          p_data,
          data_size);
  
      cc310_bl_backend_disable();
  
      cc310_backend_mutex_unlock();
  
      result = crys_error_to_ret_code(crys_error);
  
      return result;
  }
  
  
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_ECC_SECP256R1)
  
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL)
  