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Diffstat (limited to 'protocols/Tlen/src/crypto/polarssl/aes.h')
| -rw-r--r-- | protocols/Tlen/src/crypto/polarssl/aes.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/protocols/Tlen/src/crypto/polarssl/aes.h b/protocols/Tlen/src/crypto/polarssl/aes.h new file mode 100644 index 0000000000..efc13daf5b --- /dev/null +++ b/protocols/Tlen/src/crypto/polarssl/aes.h @@ -0,0 +1,167 @@ +/** + * \file aes.h + * + * \brief AES block cipher + * + * Copyright (C) 2006-2010, Brainspark B.V. + * + * This file is part of PolarSSL (http://www.polarssl.org) + * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> + * + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#ifndef POLARSSL_AES_H +#define POLARSSL_AES_H + +#include <string.h> + +#define AES_ENCRYPT 1 +#define AES_DECRYPT 0 + +#define POLARSSL_ERR_AES_INVALID_KEY_LENGTH -0x0020 /**< Invalid key length. */ +#define POLARSSL_ERR_AES_INVALID_INPUT_LENGTH -0x0022 /**< Invalid data input length. */ + +/** + * \brief AES context structure + */ +typedef struct +{ + int nr; /*!< number of rounds */ + unsigned long *rk; /*!< AES round keys */ + unsigned long buf[68]; /*!< unaligned data */ +} +aes_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief AES key schedule (encryption) + * + * \param ctx AES context to be initialized + * \param key encryption key + * \param keysize must be 128, 192 or 256 + * + * \return 0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH + */ +int aes_setkey_enc( aes_context *ctx, const unsigned char *key, unsigned int keysize ); + +/** + * \brief AES key schedule (decryption) + * + * \param ctx AES context to be initialized + * \param key decryption key + * \param keysize must be 128, 192 or 256 + * + * \return 0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH + */ +int aes_setkey_dec( aes_context *ctx, const unsigned char *key, unsigned int keysize ); + +/** + * \brief AES-ECB block encryption/decryption + * + * \param ctx AES context + * \param mode AES_ENCRYPT or AES_DECRYPT + * \param input 16-byte input block + * \param output 16-byte output block + * + * \return 0 if successful + */ +int aes_crypt_ecb( aes_context *ctx, + int mode, + const unsigned char input[16], + unsigned char output[16] ); + +/** + * \brief AES-CBC buffer encryption/decryption + * Length should be a multiple of the block + * size (16 bytes) + * + * \param ctx AES context + * \param mode AES_ENCRYPT or 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 POLARSSL_ERR_AES_INVALID_INPUT_LENGTH + */ +int aes_crypt_cbc( aes_context *ctx, + int mode, + size_t length, + unsigned char iv[16], + const unsigned char *input, + unsigned char *output ); + +/** + * \brief AES-CFB128 buffer encryption/decryption. + * + * \param ctx AES context + * \param mode AES_ENCRYPT or 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 aes_crypt_cfb128( 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-CTR buffer encryption/decryption + * + * Warning: You have to keep the maximum use of your counter in mind! + * + * \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 aes_crypt_ctr( 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 ); +/** + * \brief Checkup routine + * + * \return 0 if successful, or 1 if the test failed + */ +int aes_self_test( int verbose ); + +#ifdef __cplusplus +} +#endif + +#endif /* aes.h */ |