b4da40d0e207bf7c01453bc95af430414ef2e038
[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 #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