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aes.h

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  • Forked from Nettle / nettle
    3905 commits behind the upstream repository.
    aes.h 1.78 KiB
    /* aes.h
     *
     * The aes/rijndael block cipher.
     */
    
    /* nettle, low-level cryptographics library
     *
     * Copyright (C) 2001 Niels Möller
     *  
     * The nettle library is free software; you can redistribute it and/or modify
     * it under the terms of the GNU Lesser General Public License as published by
     * the Free Software Foundation; either version 2.1 of the License, or (at your
     * option) any later version.
     * 
     * The nettle library 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 Lesser General Public
     * License for more details.
     * 
     * You should have received a copy of the GNU Lesser General Public License
     * along with the nettle library; see the file COPYING.LIB.  If not, write to
     * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
     * MA 02111-1307, USA.
     */
     
    #ifndef NETTLE_AES_H_INCLUDED
    #define NETTLE_AES_H_INCLUDED
    
    #include <inttypes.h>
    
    #define AES_BLOCK_SIZE 16
    
    /* 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 16
    #define AES_MAX_KEY_SIZE 32
    
    #define AES_KEY_SIZE 32
    
    struct aes_ctx
    {
      uint32_t keys[60];  /* maximum size of key schedule */
      unsigned  nrounds;  /* number of rounds to use for our key size */
    };
    
    void
    aes_set_encrypt_key(struct aes_ctx *ctx,
    		    unsigned length, const uint8_t *key);
    void
    aes_set_decrypt_key(struct aes_ctx *ctx,
    		   unsigned length, const uint8_t *key);
    
    void
    aes_encrypt(struct aes_ctx *ctx,
    	    unsigned length, uint8_t *dst,
    	    const uint8_t *src);
    void
    aes_decrypt(struct aes_ctx *ctx,
    	    unsigned length, uint8_t *dst,
    	    const uint8_t *src);
    
    #endif /* NETTLE_AES_H_INCLUDED */