STM32 MBEDTLS: AES/CCM/GCM/MD5/SHA1/SHA256 ALT implementation

Author: jeromecoutant

features/mbedtls/targets/TARGET_STM/aes_alt.c

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+/**
+ * \file aes_alt.h
+ *
+ * \brief   This file contains AES definitions and functions.
+ *
+ *          The Advanced Encryption Standard (AES) specifies a FIPS-approved
+ *          cryptographic algorithm that can be used to protect electronic
+ *          data.
+ *
+ *          The AES algorithm is a symmetric block cipher that can
+ *          encrypt and decrypt information. For more information, see
+ *          <em>FIPS Publication 197: Advanced Encryption Standard</em> and
+ *          <em>ISO/IEC 18033-2:2006: Information technology -- Security
+ *          techniques -- Encryption algorithms -- Part 2: Asymmetric
+ *          ciphers</em>.
+ *
+ *          The AES-XTS block mode is standardized by NIST SP 800-38E
+ *          <https://nvlpubs.nist.gov/nistpubs/legacy/sp/nistspecialpublication800-38e.pdf>
+ *          and described in detail by IEEE P1619
+ *          <https://ieeexplore.ieee.org/servlet/opac?punumber=4375278>.
+ */
+
+/*
+ *  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 AES HW services based on API from mbed TLS
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef MBEDTLS_AES_ALT_H
+#define MBEDTLS_AES_ALT_H
+
+#if (TARGET_STM32L4)
+#include "aes_alt_stm32l4.h"
+#else
+#if defined(MBEDTLS_AES_ALT)
+/* Includes ------------------------------------------------------------------*/
+#include "cryp_stm32.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Exported types ------------------------------------------------------------*/
+/**
+ * \brief          AES context structure
+ */
+typedef struct {
+    /* Encryption/Decryption key */
+    uint32_t aes_key[8];
+
+    CRYP_HandleTypeDef hcryp_aes;   /* AES context                     */
+    uint32_t           ctx_save_cr; /* save context for multi-context  */
+}
+mbedtls_aes_context;
+
+#if defined(MBEDTLS_CIPHER_MODE_XTS)
+/**
+ * \brief The AES XTS context-type definition.
+ */
+typedef struct mbedtls_aes_xts_context {
+    mbedtls_aes_context crypt; /*!< The AES context to use for AES block
+                                        encryption or decryption. */
+    mbedtls_aes_context tweak; /*!< The AES context used for tweak
+                                        computation. */
+} mbedtls_aes_xts_context;
+#endif /* MBEDTLS_CIPHER_MODE_XTS */
+
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_AES_ALT */
+
+#endif /* MBEDTLS_AES_ALT_H */
+
+#endif /* ! TARGET_STM32L4 */