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aes.h

/* crypto/aes/aes.h -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
 * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    openssl-core@openssl.org.
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 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
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 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
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 */

#ifndef HEADER_AES_H
#define HEADER_AES_H

#include <openssl/opensslconf.h>

#ifdef OPENSSL_NO_AES
#error AES is disabled.
#endif

#define AES_ENCRYPT     1
#define AES_DECRYPT     0

/* Because array size can't be a const in C, the following two are macros.
   Both sizes are in bytes. */
#define AES_MAXNR 14
#define AES_BLOCK_SIZE 16

#ifdef  __cplusplus
extern "C" {
#endif

/* This should be a hidden type, but EVP requires that the size be known */
struct aes_key_st {
#ifdef AES_LONG
    unsigned long rd_key[4 *(AES_MAXNR + 1)];
#else
    unsigned int rd_key[4 *(AES_MAXNR + 1)];
#endif
    int rounds;
};
typedef struct aes_key_st AES_KEY;

const char *AES_options(void);

int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
      AES_KEY *key);
int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
      AES_KEY *key);

void AES_encrypt(const unsigned char *in, unsigned char *out,
      const AES_KEY *key);
void AES_decrypt(const unsigned char *in, unsigned char *out,
      const AES_KEY *key);

void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
      const AES_KEY *key, const int enc);
void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char *ivec, const int enc);
void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char *ivec, int *num, const int enc);
void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char *ivec, int *num, const int enc);
void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char *ivec, int *num, const int enc);
void AES_cfbr_encrypt_block(const unsigned char *in,unsigned char *out,
                      const int nbits,const AES_KEY *key,
                      unsigned char *ivec,const int enc);
void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char *ivec, int *num);
void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
      const unsigned long length, const AES_KEY *key,
      unsigned char ivec[AES_BLOCK_SIZE],
      unsigned char ecount_buf[AES_BLOCK_SIZE],
      unsigned int *num);

/* For IGE, see also http://www.links.org/files/openssl-ige.pdf */
/* NB: the IV is _two_ blocks long */
void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
                 const unsigned long length, const AES_KEY *key,
                 unsigned char *ivec, const int enc);
/* NB: the IV is _four_ blocks long */
void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
                  const unsigned long length, const AES_KEY *key,
                  const AES_KEY *key2, const unsigned char *ivec,
                  const int enc);


#ifdef  __cplusplus
}
#endif

#endif /* !HEADER_AES_H */

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