75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
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/*
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MIT License
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Copyright (c) 2016 Andrew Carter
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#ifndef AES_H
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#define AES_H
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#include <stdint.h>
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#define AES_256_ROUNDS 14
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#define AES_192_ROUNDS 12
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#define AES_128_ROUNDS 10
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// Uncomment this (or compile with -DOPT_8_BIT) to optimise for an 8 bit architecture
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#define AES_OPT_8_BIT
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#ifdef AES_OPT_8_BIT
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typedef uint8_t counter;
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#else
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typedef unsigned int counter;
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#endif
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// AES-256
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typedef struct aes_256_context_t_ {
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uint8_t round_key[(AES_256_ROUNDS + 1) * 16];
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} aes_256_context_t;
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void aes_256_init (aes_256_context_t *context, uint8_t key[32]);
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void aes_256_encrypt (aes_256_context_t *context, uint8_t block[16]);
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void aes_256_decrypt (aes_256_context_t *context, uint8_t block[16]);
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// AES-192
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typedef struct aes_192_context_t_ {
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uint8_t round_key[(AES_192_ROUNDS + 1) * 16];
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} aes_192_context_t;
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void aes_192_init (aes_192_context_t *context, uint8_t key[24]);
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void aes_192_encrypt (aes_192_context_t *context, uint8_t block[16]);
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void aes_192_decrypt (aes_192_context_t *context, uint8_t block[16]);
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// AES-128
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typedef struct aes_128_context_t_ {
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uint8_t round_key[(AES_128_ROUNDS + 1) * 16];
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} aes_128_context_t;
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void aes_128_init (aes_128_context_t *context, uint8_t key[16]);
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void aes_128_encrypt (aes_128_context_t *context, uint8_t block[16]);
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void aes_128_decrypt (aes_128_context_t *context, uint8_t block[16]);
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#endif
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