Mbed OS Reference | gcm_alt.h Source File

 /**
  * \file gcm_alt.h.h
  *
  * \brief This file contains GCM definitions and functions.
  *
  * The Galois/Counter Mode (GCM) for 128-bit block ciphers is defined
  * in <em>D. McGrew, J. Viega, The Galois/Counter Mode of Operation
  * (GCM), Natl. Inst. Stand. Technol.</em>
  *
  * For more information on GCM, see <em>NIST SP 800-38D: Recommendation for
  * Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC</em>.
  *
  */
 /*
  *  Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
  *  Copyright (C) 2019-2020 STMicroelectronics, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0
  *
  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
  *  not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
  *
  *  http://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  *
  *  This file implements ST GCM HW services based on API from mbed TLS
  */
 
 /* Define to prevent recursive inclusion -------------------------------------*/
 #ifndef MBEDTLS_GCM_ALT_H
 #define MBEDTLS_GCM_ALT_H
 
 #if defined(MBEDTLS_GCM_ALT)
 /* Includes ------------------------------------------------------------------*/
 #include "cryp_stm32.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* Exported types ------------------------------------------------------------*/
 /**
  * \brief          AES context structure
  *
  */
 typedef struct mbedtls_gcm_context {
     /* Encryption/Decryption key */
     uint32_t gcm_key[8];
 
     CRYP_HandleTypeDef hcryp_gcm;      /* HW driver handle                    */
     uint32_t ctx_save_cr;              /* save context for multi-context  */
     uint64_t len;                      /* total length of the encrypted data. */
     int mode;                          /* The operation to perform:
                                                #MBEDTLS_GCM_ENCRYPT or
                                                #MBEDTLS_GCM_DECRYPT.          */
 }
 mbedtls_gcm_context;
 
 /* Exported constants --------------------------------------------------------*/
 /* Uncomment if ADD (Additional Authentication Data) may have not a length    */
 /* over a multiple of 32 bits  (Hw implementation dependance)                 */
 //#define STM32_AAD_ANY_LENGTH_SUPPORT
 /* Exported macro ------------------------------------------------------------*/
 /* Exported functions --------------------------------------------------------*/
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* MBEDTLS_GCM_ALT */
 #endif /* MBEDTLS_GCM_ALT_H */
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