344 lines
12 KiB
C
344 lines
12 KiB
C
/**
|
|
* \file aes.h
|
|
*
|
|
* \brief AES block cipher
|
|
*
|
|
* Copyright (C) 2006-2015, ARM Limited, 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 is part of mbed TLS (https://tls.mbed.org)
|
|
*/
|
|
#ifndef MBEDTLS_AES_H
|
|
#define MBEDTLS_AES_H
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/* padlock.c and aesni.c rely on these values! */
|
|
#define MBEDTLS_AES_ENCRYPT 1
|
|
#define MBEDTLS_AES_DECRYPT 0
|
|
|
|
#define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH -0x0020 /**< Invalid key length. */
|
|
#define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH -0x0022 /**< Invalid data input length. */
|
|
|
|
#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
|
|
!defined(inline) && !defined(__cplusplus)
|
|
#define inline __inline
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_AES_ALT)
|
|
// Regular implementation
|
|
//
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \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
|
|
{
|
|
int nr; /*!< number of rounds */
|
|
uint32_t *rk; /*!< AES round keys */
|
|
uint32_t buf[68]; /*!< unaligned data */
|
|
}
|
|
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
|
|
|
|
#else /* MBEDTLS_AES_ALT */
|
|
#include "aes_alt.h"
|
|
#endif /* MBEDTLS_AES_ALT */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief Checkup routine
|
|
*
|
|
* \return 0 if successful, or 1 if the test failed
|
|
*/
|
|
int mbedtls_aes_self_test( int verbose );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* aes.h */
|