Diff: features/mbedtls/targets/TARGET_STM/aes_alt.h

Revision:

0:b74591d5ab33

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/mbedtls/targets/TARGET_STM/aes_alt.h	Mon Dec 11 17:54:04 2017 +0000
@@ -0,0 +1,308 @@
+/*
+ *  aes_alt.h AES block cipher
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ *  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.
+ *
+ */
+#ifndef MBEDTLS_AES_ALT_H
+#define MBEDTLS_AES_ALT_H
+
+
+#if defined(MBEDTLS_AES_ALT)
+#include "mbedtls/platform.h"
+#include "mbedtls/config.h"
+
+#include "cmsis.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ST_AES_TIMEOUT    ((uint32_t) 0xFF) /* 255 ms timeout for the crypto processor */
+#define ST_ERR_AES_BUSY   (-0x0023)      /* Crypto processor is busy, timeout occured */
+/**
+ * \brief          AES context structure
+ *
+ * \note           buf is able to hold 32 extra bytes, which can be used:
+ *                 - for alignment purposes if VIA padlock is used, and/or
+ *                 - to simplify key expansion in the 256-bit case by
+ *                 generating an extra round key
+ */
+typedef struct
+{
+    unsigned char      aes_key[32]; /* Decryption key */
+    CRYP_HandleTypeDef hcryp_aes;
+    uint32_t           ctx_save_cr; /* save context for multi-instance */
+}
+mbedtls_aes_context;
+
+/**
+ * \brief          Initialize AES context
+ *
+ * \param ctx      AES context to be initialized
+ */
+void mbedtls_aes_init( mbedtls_aes_context *ctx );
+
+/**
+ * \brief          Clear AES context
+ *
+ * \param ctx      AES context to be cleared
+ */
+void mbedtls_aes_free( mbedtls_aes_context *ctx );
+
+/**
+ * \brief          AES key schedule (encryption)
+ *
+ * \param ctx      AES context to be initialized
+ * \param key      encryption key
+ * \param keybits  must be 128, 192 or 256
+ *
+ * \return         0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
+ */
+int mbedtls_aes_setkey_enc( mbedtls_aes_context *ctx, const unsigned char *key,
+                    unsigned int keybits );
+
+/**
+ * \brief          AES key schedule (decryption)
+ *
+ * \param ctx      AES context to be initialized
+ * \param key      decryption key
+ * \param keybits  must be 128, 192 or 256
+ *
+ * \return         0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
+ */
+int mbedtls_aes_setkey_dec( mbedtls_aes_context *ctx, const unsigned char *key,
+                    unsigned int keybits );
+
+/**
+ * \brief          AES-ECB block encryption/decryption
+ *
+ * \param ctx      AES context
+ * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
+ * \param input    16-byte input block
+ * \param output   16-byte output block
+ *
+ * \return         0 if successful
+ */
+int mbedtls_aes_crypt_ecb( mbedtls_aes_context *ctx,
+                    int mode,
+                    const unsigned char input[16],
+                    unsigned char output[16] );
+
+#if defined(MBEDTLS_CIPHER_MODE_CBC)
+/**
+ * \brief          AES-CBC buffer encryption/decryption
+ *                 Length should be a multiple of the block
+ *                 size (16 bytes)
+ *
+ * \note           Upon exit, the content of the IV is updated so that you can
+ *                 call the function same function again on the following
+ *                 block(s) of data and get the same result as if it was
+ *                 encrypted in one call. This allows a "streaming" usage.
+ *                 If on the other hand you need to retain the contents of the
+ *                 IV, you should either save it manually or use the cipher
+ *                 module instead.
+ *
+ * \param ctx      AES context
+ * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
+ * \param length   length of the input data
+ * \param iv       initialization vector (updated after use)
+ * \param input    buffer holding the input data
+ * \param output   buffer holding the output data
+ *
+ * \return         0 if successful, or MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH
+ */
+int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
+                    int mode,
+                    size_t length,
+                    unsigned char iv[16],
+                    const unsigned char *input,
+                    unsigned char *output );
+#endif /* MBEDTLS_CIPHER_MODE_CBC */
+
+#if defined(MBEDTLS_CIPHER_MODE_CFB)
+/**
+ * \brief          AES-CFB128 buffer encryption/decryption.
+ *
+ * Note: Due to the nature of CFB you should use the same key schedule for
+ * both encryption and decryption. So a context initialized with
+ * mbedtls_aes_setkey_enc() for both MBEDTLS_AES_ENCRYPT and MBEDTLS_AES_DECRYPT.
+ *
+ * \note           Upon exit, the content of the IV is updated so that you can
+ *                 call the function same function again on the following
+ *                 block(s) of data and get the same result as if it was
+ *                 encrypted in one call. This allows a "streaming" usage.
+ *                 If on the other hand you need to retain the contents of the
+ *                 IV, you should either save it manually or use the cipher
+ *                 module instead.
+ *
+ * \param ctx      AES context
+ * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
+ * \param length   length of the input data
+ * \param iv_off   offset in IV (updated after use)
+ * \param iv       initialization vector (updated after use)
+ * \param input    buffer holding the input data
+ * \param output   buffer holding the output data
+ *
+ * \return         0 if successful
+ */
+int mbedtls_aes_crypt_cfb128( mbedtls_aes_context *ctx,
+                       int mode,
+                       size_t length,
+                       size_t *iv_off,
+                       unsigned char iv[16],
+                       const unsigned char *input,
+                       unsigned char *output );
+
+/**
+ * \brief          AES-CFB8 buffer encryption/decryption.
+ *
+ * Note: Due to the nature of CFB you should use the same key schedule for
+ * both encryption and decryption. So a context initialized with
+ * mbedtls_aes_setkey_enc() for both MBEDTLS_AES_ENCRYPT and MBEDTLS_AES_DECRYPT.
+ *
+ * \note           Upon exit, the content of the IV is updated so that you can
+ *                 call the function same function again on the following
+ *                 block(s) of data and get the same result as if it was
+ *                 encrypted in one call. This allows a "streaming" usage.
+ *                 If on the other hand you need to retain the contents of the
+ *                 IV, you should either save it manually or use the cipher
+ *                 module instead.
+ *
+ * \param ctx      AES context
+ * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
+ * \param length   length of the input data
+ * \param iv       initialization vector (updated after use)
+ * \param input    buffer holding the input data
+ * \param output   buffer holding the output data
+ *
+ * \return         0 if successful
+ */
+int mbedtls_aes_crypt_cfb8( mbedtls_aes_context *ctx,
+                    int mode,
+                    size_t length,
+                    unsigned char iv[16],
+                    const unsigned char *input,
+                    unsigned char *output );
+#endif /*MBEDTLS_CIPHER_MODE_CFB */
+
+#if defined(MBEDTLS_CIPHER_MODE_CTR)
+/**
+ * \brief               AES-CTR buffer encryption/decryption
+ *
+ * Warning: You have to keep the maximum use of your counter in mind!
+ *
+ * Note: Due to the nature of CTR you should use the same key schedule for
+ * both encryption and decryption. So a context initialized with
+ * mbedtls_aes_setkey_enc() for both MBEDTLS_AES_ENCRYPT and MBEDTLS_AES_DECRYPT.
+ *
+ * \param ctx           AES context
+ * \param length        The length of the data
+ * \param nc_off        The offset in the current stream_block (for resuming
+ *                      within current cipher stream). The offset pointer to
+ *                      should be 0 at the start of a stream.
+ * \param nonce_counter The 128-bit nonce and counter.
+ * \param stream_block  The saved stream-block for resuming. Is overwritten
+ *                      by the function.
+ * \param input         The input data stream
+ * \param output        The output data stream
+ *
+ * \return         0 if successful
+ */
+int mbedtls_aes_crypt_ctr( mbedtls_aes_context *ctx,
+                       size_t length,
+                       size_t *nc_off,
+                       unsigned char nonce_counter[16],
+                       unsigned char stream_block[16],
+                       const unsigned char *input,
+                       unsigned char *output );
+#endif /* MBEDTLS_CIPHER_MODE_CTR */
+
+/**
+ * \brief           Internal AES block encryption function
+ *                  (Only exposed to allow overriding it,
+ *                  see MBEDTLS_AES_ENCRYPT_ALT)
+ *
+ * \param ctx       AES context
+ * \param input     Plaintext block
+ * \param output    Output (ciphertext) block
+ *
+ * \return          0 if successful
+ */
+int mbedtls_internal_aes_encrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] );
+
+/**
+ * \brief           Internal AES block decryption function
+ *                  (Only exposed to allow overriding it,
+ *                  see MBEDTLS_AES_DECRYPT_ALT)
+ *
+ * \param ctx       AES context
+ * \param input     Ciphertext block
+ * \param output    Output (plaintext) block
+ *
+ * \return          0 if successful
+ */
+int mbedtls_internal_aes_decrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] );
+
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
+#else
+#define MBEDTLS_DEPRECATED
+#endif
+/**
+ * \brief           Deprecated internal AES block encryption function
+ *                  without return value.
+ *
+ * \deprecated      Superseded by mbedtls_aes_encrypt_ext() in 2.5.0
+ *
+ * \param ctx       AES context
+ * \param input     Plaintext block
+ * \param output    Output (ciphertext) block
+ */
+MBEDTLS_DEPRECATED void mbedtls_aes_encrypt( mbedtls_aes_context *ctx,
+                                             const unsigned char input[16],
+                                             unsigned char output[16] );
+
+/**
+ * \brief           Deprecated internal AES block decryption function
+ *                  without return value.
+ *
+ * \deprecated      Superseded by mbedtls_aes_decrypt_ext() in 2.5.0
+ *
+ * \param ctx       AES context
+ * \param input     Ciphertext block
+ * \param output    Output (plaintext) block
+ */
+MBEDTLS_DEPRECATED void mbedtls_aes_decrypt( mbedtls_aes_context *ctx,
+                                             const unsigned char input[16],
+                                             unsigned char output[16] );
+
+#undef MBEDTLS_DEPRECATED
+#endif /* !MBEDTLS_DEPRECATED_REMOVED */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_AES_ALT */
+
+#endif /* MBEDTLS_AES_ALT_H */
+