178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/* aes.h
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The aes/rijndael block cipher.
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Copyright (C) 2001, 2013 Niels Möller
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#ifndef NETTLE_AES_H_INCLUDED
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#define NETTLE_AES_H_INCLUDED
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#include "nettle-types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Name mangling */
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#define aes_set_encrypt_key nettle_aes_set_encrypt_key
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#define aes_set_decrypt_key nettle_aes_set_decrypt_key
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#define aes_invert_key nettle_aes_invert_key
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#define aes_encrypt nettle_aes_encrypt
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#define aes_decrypt nettle_aes_decrypt
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#define aes128_set_encrypt_key nettle_aes128_set_encrypt_key
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#define aes128_set_decrypt_key nettle_aes128_set_decrypt_key
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#define aes128_invert_key nettle_aes128_invert_key
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#define aes128_encrypt nettle_aes128_encrypt
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#define aes128_decrypt nettle_aes128_decrypt
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#define aes192_set_encrypt_key nettle_aes192_set_encrypt_key
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#define aes192_set_decrypt_key nettle_aes192_set_decrypt_key
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#define aes192_invert_key nettle_aes192_invert_key
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#define aes192_encrypt nettle_aes192_encrypt
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#define aes192_decrypt nettle_aes192_decrypt
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#define aes256_set_encrypt_key nettle_aes256_set_encrypt_key
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#define aes256_set_decrypt_key nettle_aes256_set_decrypt_key
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#define aes256_invert_key nettle_aes256_invert_key
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#define aes256_encrypt nettle_aes256_encrypt
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#define aes256_decrypt nettle_aes256_decrypt
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#define AES_BLOCK_SIZE 16
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#define AES128_KEY_SIZE 16
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#define AES192_KEY_SIZE 24
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#define AES256_KEY_SIZE 32
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#define _AES128_ROUNDS 10
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#define _AES192_ROUNDS 12
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#define _AES256_ROUNDS 14
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/* Variable key size between 128 and 256 bits. But the only valid
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* values are 16 (128 bits), 24 (192 bits) and 32 (256 bits). */
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#define AES_MIN_KEY_SIZE AES128_KEY_SIZE
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#define AES_MAX_KEY_SIZE AES256_KEY_SIZE
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/* Older nettle-2.7 interface */
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#define AES_KEY_SIZE 32
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struct aes_ctx
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{
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unsigned rounds; /* number of rounds to use for our key size */
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uint32_t keys[4*(_AES256_ROUNDS + 1)]; /* maximum size of key schedule */
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};
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void
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aes_set_encrypt_key(struct aes_ctx *ctx,
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size_t length, const uint8_t *key);
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void
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aes_set_decrypt_key(struct aes_ctx *ctx,
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size_t length, const uint8_t *key);
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void
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aes_invert_key(struct aes_ctx *dst,
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const struct aes_ctx *src);
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void
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aes_encrypt(const struct aes_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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void
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aes_decrypt(const struct aes_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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struct aes128_ctx
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{
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uint32_t keys[4 * (_AES128_ROUNDS + 1)];
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};
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void
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aes128_set_encrypt_key(struct aes128_ctx *ctx, const uint8_t *key);
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void
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aes128_set_decrypt_key(struct aes128_ctx *ctx, const uint8_t *key);
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void
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aes128_invert_key(struct aes128_ctx *dst,
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const struct aes128_ctx *src);
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void
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aes128_encrypt(const struct aes128_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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void
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aes128_decrypt(const struct aes128_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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struct aes192_ctx
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{
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uint32_t keys[4 * (_AES192_ROUNDS + 1)];
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};
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void
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aes192_set_encrypt_key(struct aes192_ctx *ctx, const uint8_t *key);
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void
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aes192_set_decrypt_key(struct aes192_ctx *ctx, const uint8_t *key);
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void
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aes192_invert_key(struct aes192_ctx *dst,
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const struct aes192_ctx *src);
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void
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aes192_encrypt(const struct aes192_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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void
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aes192_decrypt(const struct aes192_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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struct aes256_ctx
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{
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uint32_t keys[4 * (_AES256_ROUNDS + 1)];
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};
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void
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aes256_set_encrypt_key(struct aes256_ctx *ctx, const uint8_t *key);
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void
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aes256_set_decrypt_key(struct aes256_ctx *ctx, const uint8_t *key);
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void
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aes256_invert_key(struct aes256_ctx *dst,
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const struct aes256_ctx *src);
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void
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aes256_encrypt(const struct aes256_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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void
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aes256_decrypt(const struct aes256_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETTLE_AES_H_INCLUDED */
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