include/openssl/aes.h

   1 /* ====================================================================
   2  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    openssl-core@openssl.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  *
  49  */
  50
  51 #ifndef HEADER_AES_H
  52 # define HEADER_AES_H
  53
  54 # include <openssl/opensslconf.h>
  55
  56 # ifdef OPENSSL_NO_AES
  57 #  error AES is disabled.
  58 # endif
  59
  60 # include <stddef.h>
  61
  62 # define AES_ENCRYPT     1
  63 # define AES_DECRYPT     0
  64
  65 /*
  66  * Because array size can't be a const in C, the following two are macros.
  67  * Both sizes are in bytes.
  68  */
  69 # define AES_MAXNR 14
  70 # define AES_BLOCK_SIZE 16
  71
  72 #ifdef  __cplusplus
  73 extern "C" {
  74 #endif
  75
  76 /* This should be a hidden type, but EVP requires that the size be known */
  77 struct aes_key_st {
  78 # ifdef AES_LONG
  79     unsigned long rd_key[4 * (AES_MAXNR + 1)];
  80 # else
  81     unsigned int rd_key[4 * (AES_MAXNR + 1)];
  82 # endif
  83     int rounds;
  84 };
  85 typedef struct aes_key_st AES_KEY;
  86
  87 const char *AES_options(void);
  88
  89 int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
  90                         AES_KEY *key);
  91 int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
  92                         AES_KEY *key);
  93
  94 void AES_encrypt(const unsigned char *in, unsigned char *out,
  95                  const AES_KEY *key);
  96 void AES_decrypt(const unsigned char *in, unsigned char *out,
  97                  const AES_KEY *key);
  98
  99 void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
 100                      const AES_KEY *key, const int enc);
 101 void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
 102                      size_t length, const AES_KEY *key,
 103                      unsigned char *ivec, const int enc);
 104 void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
 105                         size_t length, const AES_KEY *key,
 106                         unsigned char *ivec, int *num, const int enc);
 107 void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
 108                       size_t length, const AES_KEY *key,
 109                       unsigned char *ivec, int *num, const int enc);
 110 void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
 111                       size_t length, const AES_KEY *key,
 112                       unsigned char *ivec, int *num, const int enc);
 113 void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
 114                         size_t length, const AES_KEY *key,
 115                         unsigned char *ivec, int *num);
 116 /* NB: the IV is _two_ blocks long */
 117 void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
 118                      size_t length, const AES_KEY *key,
 119                      unsigned char *ivec, const int enc);
 120 /* NB: the IV is _four_ blocks long */
 121 void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
 122                         size_t length, const AES_KEY *key,
 123                         const AES_KEY *key2, const unsigned char *ivec,
 124                         const int enc);
 125
 126 int AES_wrap_key(AES_KEY *key, const unsigned char *iv,
 127                  unsigned char *out,
 128                  const unsigned char *in, unsigned int inlen);
 129 int AES_unwrap_key(AES_KEY *key, const unsigned char *iv,
 130                    unsigned char *out,
 131                    const unsigned char *in, unsigned int inlen);
 132
 133
 134 #ifdef  __cplusplus
 135 }
 136 #endif
 137
 138 #endif                          /* !HEADER_AES_H */