crypto/evp/e_aes.c

   1 /* ====================================================================
   2  * Copyright (c) 2001 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 #define OPENSSL_FIPSAPI
  52
  53 #include <openssl/opensslconf.h>
  54 #ifndef OPENSSL_NO_AES
  55 #include <openssl/evp.h>
  56 #include <openssl/err.h>
  57 #include <string.h>
  58 #include <assert.h>
  59 #include <openssl/aes.h>
  60 #include <openssl/modes.h>
  61 #include "evp_locl.h"
  62
  63 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  64                                         const unsigned char *iv, int enc);
  65
  66 typedef struct
  67         {
  68         AES_KEY ks;
  69         } EVP_AES_KEY;
  70
  71 #define data(ctx)       EVP_C_DATA(EVP_AES_KEY,ctx)
  72
  73 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
  74                        NID_aes_128, 16, 16, 16, 128,
  75                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
  76                        aes_init_key, NULL, NULL, NULL, NULL)
  77 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
  78                        NID_aes_192, 16, 24, 16, 128,
  79                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
  80                        aes_init_key, NULL, NULL, NULL, NULL)
  81 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
  82                        NID_aes_256, 16, 32, 16, 128,
  83                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
  84                        aes_init_key, NULL, NULL, NULL, NULL)
  85
  86 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16,EVP_CIPH_FLAG_FIPS)
  87
  88 IMPLEMENT_AES_CFBR(128,1)
  89 IMPLEMENT_AES_CFBR(192,1)
  90 IMPLEMENT_AES_CFBR(256,1)
  91
  92 IMPLEMENT_AES_CFBR(128,8)
  93 IMPLEMENT_AES_CFBR(192,8)
  94 IMPLEMENT_AES_CFBR(256,8)
  95
  96 static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
  97                 const unsigned char *in, size_t len)
  98 {
  99         unsigned int num;
 100         num = ctx->num;
 101 #ifdef AES_CTR_ASM
 102         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 103                         size_t blocks, const AES_KEY *key,
 104                         const unsigned char ivec[AES_BLOCK_SIZE]);
 105
 106         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 107                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 108                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
 109 #else
 110         CRYPTO_ctr128_encrypt(in,out,len,
 111                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 112                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
 113 #endif
 114         ctx->num = (size_t)num;
 115         return 1;
 116 }
 117
 118 static const EVP_CIPHER aes_128_ctr_cipher=
 119         {
 120         NID_aes_128_ctr,1,16,16,
 121         EVP_CIPH_CTR_MODE,
 122         aes_init_key,
 123         aes_counter,
 124         NULL,
 125         sizeof(EVP_AES_KEY),
 126         NULL,
 127         NULL,
 128         NULL,
 129         NULL
 130         };
 131
 132 const EVP_CIPHER *EVP_aes_128_ctr (void)
 133 {       return &aes_128_ctr_cipher;     }
 134
 135 static const EVP_CIPHER aes_192_ctr_cipher=
 136         {
 137         NID_aes_192_ctr,1,24,16,
 138         EVP_CIPH_CTR_MODE,
 139         aes_init_key,
 140         aes_counter,
 141         NULL,
 142         sizeof(EVP_AES_KEY),
 143         NULL,
 144         NULL,
 145         NULL,
 146         NULL
 147         };
 148
 149 const EVP_CIPHER *EVP_aes_192_ctr (void)
 150 {       return &aes_192_ctr_cipher;     }
 151
 152 static const EVP_CIPHER aes_256_ctr_cipher=
 153         {
 154         NID_aes_256_ctr,1,32,16,
 155         EVP_CIPH_CTR_MODE,
 156         aes_init_key,
 157         aes_counter,
 158         NULL,
 159         sizeof(EVP_AES_KEY),
 160         NULL,
 161         NULL,
 162         NULL,
 163         NULL
 164         };
 165
 166 const EVP_CIPHER *EVP_aes_256_ctr (void)
 167 {       return &aes_256_ctr_cipher;     }
 168
 169 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 170                    const unsigned char *iv, int enc)
 171         {
 172         int ret;
 173
 174         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 175             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 176             && !enc)
 177                 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 178         else
 179                 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 180
 181         if(ret < 0)
 182                 {
 183                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 184                 return 0;
 185                 }
 186
 187         return 1;
 188         }
 189
 190 #endif