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/* aes.h The aes/rijndael block cipher. Copyright (C) 2001, 2013 Niels Möller This file is part of GNU Nettle. GNU Nettle is free software: you can redistribute it and/or modify it under the terms of either: * the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. or * 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. or both in parallel, as here. GNU Nettle 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 copies of the GNU General Public License and the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/. */ #ifndef NETTLE_AES_H_INCLUDED #define NETTLE_AES_H_INCLUDED #include "nettle-types.h" #ifdef __cplusplus extern "C" { #endif /* Name mangling */ #define aes_set_encrypt_key nettle_aes_set_encrypt_key #define aes_set_decrypt_key nettle_aes_set_decrypt_key #define aes_invert_key nettle_aes_invert_key #define aes_encrypt nettle_aes_encrypt #define aes_decrypt nettle_aes_decrypt #define aes128_set_encrypt_key nettle_aes128_set_encrypt_key #define aes128_set_decrypt_key nettle_aes128_set_decrypt_key #define aes128_invert_key nettle_aes128_invert_key #define aes128_encrypt nettle_aes128_encrypt #define aes128_decrypt nettle_aes128_decrypt #define aes192_set_encrypt_key nettle_aes192_set_encrypt_key #define aes192_set_decrypt_key nettle_aes192_set_decrypt_key #define aes192_invert_key nettle_aes192_invert_key #define aes192_encrypt nettle_aes192_encrypt #define aes192_decrypt nettle_aes192_decrypt #define aes256_set_encrypt_key nettle_aes256_set_encrypt_key #define aes256_set_decrypt_key nettle_aes256_set_decrypt_key #define aes256_invert_key nettle_aes256_invert_key #define aes256_encrypt nettle_aes256_encrypt #define aes256_decrypt nettle_aes256_decrypt #define AES_BLOCK_SIZE 16 #define AES128_KEY_SIZE 16 #define AES192_KEY_SIZE 24 #define AES256_KEY_SIZE 32 #define _AES128_ROUNDS 10 #define _AES192_ROUNDS 12 #define _AES256_ROUNDS 14 struct aes128_ctx { uint32_t keys[4 * (_AES128_ROUNDS + 1)]; }; void aes128_set_encrypt_key(struct aes128_ctx *ctx, const uint8_t *key); void aes128_set_decrypt_key(struct aes128_ctx *ctx, const uint8_t *key); void aes128_invert_key(struct aes128_ctx *dst, const struct aes128_ctx *src); void aes128_encrypt(const struct aes128_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); void aes128_decrypt(const struct aes128_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); struct aes192_ctx { uint32_t keys[4 * (_AES192_ROUNDS + 1)]; }; void aes192_set_encrypt_key(struct aes192_ctx *ctx, const uint8_t *key); void aes192_set_decrypt_key(struct aes192_ctx *ctx, const uint8_t *key); void aes192_invert_key(struct aes192_ctx *dst, const struct aes192_ctx *src); void aes192_encrypt(const struct aes192_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); void aes192_decrypt(const struct aes192_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); struct aes256_ctx { uint32_t keys[4 * (_AES256_ROUNDS + 1)]; }; void aes256_set_encrypt_key(struct aes256_ctx *ctx, const uint8_t *key); void aes256_set_decrypt_key(struct aes256_ctx *ctx, const uint8_t *key); void aes256_invert_key(struct aes256_ctx *dst, const struct aes256_ctx *src); void aes256_encrypt(const struct aes256_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); void aes256_decrypt(const struct aes256_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src); /* The older nettle-2.7 AES interface is deprecated, please migrate to the newer interface where each algorithm has a fixed key size. */ /* Variable key size between 128 and 256 bits. But the only valid * values are 16 (128 bits), 24 (192 bits) and 32 (256 bits). */ #define AES_MIN_KEY_SIZE AES128_KEY_SIZE #define AES_MAX_KEY_SIZE AES256_KEY_SIZE #define AES_KEY_SIZE 32 struct aes_ctx { unsigned key_size; /* In octets */ union { struct aes128_ctx ctx128; struct aes192_ctx ctx192; struct aes256_ctx ctx256; } u; }; void aes_set_encrypt_key(struct aes_ctx *ctx, size_t length, const uint8_t *key) _NETTLE_ATTRIBUTE_DEPRECATED; void aes_set_decrypt_key(struct aes_ctx *ctx, size_t length, const uint8_t *key) _NETTLE_ATTRIBUTE_DEPRECATED; void aes_invert_key(struct aes_ctx *dst, const struct aes_ctx *src) _NETTLE_ATTRIBUTE_DEPRECATED; void aes_encrypt(const struct aes_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src) _NETTLE_ATTRIBUTE_DEPRECATED; void aes_decrypt(const struct aes_ctx *ctx, size_t length, uint8_t *dst, const uint8_t *src) _NETTLE_ATTRIBUTE_DEPRECATED; #ifdef __cplusplus } #endif #endif /* NETTLE_AES_H_INCLUDED */