x86[_64] assembler pack: back-port SHA1 and RC4 from HEAD.
[openssl.git] / 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 #include <openssl/opensslconf.h>
52 #ifndef OPENSSL_NO_AES
53 #include <openssl/evp.h>
54 #include <openssl/err.h>
55 #include <string.h>
56 #include <assert.h>
57 #include <openssl/aes.h>
58 #include <openssl/modes.h>
59 #include "evp_locl.h"
60
61 #ifndef OPENSSL_FIPS
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                        0, aes_init_key, NULL, 
76                        EVP_CIPHER_set_asn1_iv,
77                        EVP_CIPHER_get_asn1_iv,
78                        NULL)
79 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
80                        NID_aes_192, 16, 24, 16, 128,
81                        0, aes_init_key, NULL, 
82                        EVP_CIPHER_set_asn1_iv,
83                        EVP_CIPHER_get_asn1_iv,
84                        NULL)
85 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
86                        NID_aes_256, 16, 32, 16, 128,
87                        0, aes_init_key, NULL, 
88                        EVP_CIPHER_set_asn1_iv,
89                        EVP_CIPHER_get_asn1_iv,
90                        NULL)
91
92 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16)
93
94 IMPLEMENT_AES_CFBR(128,1)
95 IMPLEMENT_AES_CFBR(192,1)
96 IMPLEMENT_AES_CFBR(256,1)
97
98 IMPLEMENT_AES_CFBR(128,8)
99 IMPLEMENT_AES_CFBR(192,8)
100 IMPLEMENT_AES_CFBR(256,8)
101
102 static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
103                 const unsigned char *in, size_t len)
104 {
105         unsigned int num;
106         num = ctx->num;
107 #ifdef AES_CTR_ASM
108         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
109                         size_t blocks, const AES_KEY *key,
110                         const unsigned char ivec[AES_BLOCK_SIZE]);
111
112         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
113                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
114                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
115 #else
116         CRYPTO_ctr128_encrypt(in,out,len,
117                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
118                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
119 #endif
120         ctx->num = (size_t)num;
121         return 1;
122 }
123
124 static const EVP_CIPHER aes_128_ctr_cipher=
125         {
126         NID_aes_128_ctr,1,16,16,
127         EVP_CIPH_CTR_MODE,
128         aes_init_key,
129         aes_counter,
130         NULL,
131         sizeof(EVP_AES_KEY),
132         NULL,
133         NULL,
134         NULL,
135         NULL
136         };
137
138 const EVP_CIPHER *EVP_aes_128_ctr (void)
139 {       return &aes_128_ctr_cipher;     }
140
141 static const EVP_CIPHER aes_192_ctr_cipher=
142         {
143         NID_aes_192_ctr,1,24,16,
144         EVP_CIPH_CTR_MODE,
145         aes_init_key,
146         aes_counter,
147         NULL,
148         sizeof(EVP_AES_KEY),
149         NULL,
150         NULL,
151         NULL,
152         NULL
153         };
154
155 const EVP_CIPHER *EVP_aes_192_ctr (void)
156 {       return &aes_192_ctr_cipher;     }
157
158 static const EVP_CIPHER aes_256_ctr_cipher=
159         {
160         NID_aes_256_ctr,1,32,16,
161         EVP_CIPH_CTR_MODE,
162         aes_init_key,
163         aes_counter,
164         NULL,
165         sizeof(EVP_AES_KEY),
166         NULL,
167         NULL,
168         NULL,
169         NULL
170         };
171
172 const EVP_CIPHER *EVP_aes_256_ctr (void)
173 {       return &aes_256_ctr_cipher;     }
174
175 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
176                    const unsigned char *iv, int enc)
177         {
178         int ret;
179
180         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
181             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
182             && !enc) 
183                 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
184         else
185                 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
186
187         if(ret < 0)
188                 {
189                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
190                 return 0;
191                 }
192
193         return 1;
194         }
195
196 #endif
197
198 #endif