1 /* ====================================================================
2 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
51 #include <openssl/evp.h>
52 #include <openssl/err.h>
56 static int aes_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
57 const unsigned char *iv, int enc);
58 static int aes_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
59 const unsigned char *in, unsigned int inl);
60 static int aes_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
61 const unsigned char *in, unsigned int inl);
63 #define IMPLEMENT_AES_CIPHER(name, ciph_func, keylen, ivlen, mode) \
64 static EVP_CIPHER name##_cipher_st = \
72 sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+ \
73 sizeof((((EVP_CIPHER_CTX *)NULL)->c.rijndael)), \
74 EVP_CIPHER_set_asn1_iv, \
75 EVP_CIPHER_get_asn1_iv, \
79 EVP_CIPHER * EVP_##name(void) \
81 return &name##_cipher_st; \
84 IMPLEMENT_AES_CIPHER(aes_128_ecb, aes_ecb, 16, 0, EVP_CIPH_ECB_MODE)
85 IMPLEMENT_AES_CIPHER(aes_192_ecb, aes_ecb, 24, 0, EVP_CIPH_ECB_MODE)
86 IMPLEMENT_AES_CIPHER(aes_256_ecb, aes_ecb, 32, 0, EVP_CIPH_ECB_MODE)
88 IMPLEMENT_AES_CIPHER(aes_128_cbc, aes_cbc, 16, 16, EVP_CIPH_CBC_MODE)
89 IMPLEMENT_AES_CIPHER(aes_192_cbc, aes_cbc, 24, 24, EVP_CIPH_CBC_MODE)
90 IMPLEMENT_AES_CIPHER(aes_256_cbc, aes_cbc, 32, 32, EVP_CIPH_CBC_MODE)
92 static int aes_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
93 const unsigned char *iv, int enc)
95 RIJNDAEL_KEY *k=&ctx->c.rijndael;
97 k->rounds = rijndaelKeySetupEnc(k->rd_key, key, ctx->key_len * 8);
99 k->rounds = rijndaelKeySetupDec(k->rd_key, key, ctx->key_len * 8);
104 static int aes_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
105 const unsigned char *in, unsigned int inl)
107 RIJNDAEL_KEY *k=&ctx->c.rijndael;
111 rijndaelEncrypt(k->rd_key,k->rounds, in, out);
113 rijndaelDecrypt(k->rd_key,k->rounds, in, out);
123 static int aes_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
124 const unsigned char *in, unsigned int inl)
127 unsigned char tmp[16];
128 RIJNDAEL_KEY *k=&ctx->c.rijndael;
133 for(n=0 ; n < 16 ; n++)
134 tmp[n] = in[n] ^ ctx->iv[n];
135 rijndaelEncrypt(k->rd_key,k->rounds, tmp, out);
136 memcpy(ctx->iv,out,16);
141 rijndaelDecrypt(k->rd_key,k->rounds, in, out);
142 for(n=0 ; n < 16 ; n++)
143 out[n] ^= ctx->iv[n];
144 memcpy(ctx->iv,tmp,16);