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/opensslconf.h>
52 #ifndef OPENSSL_NO_AES
53 #include <openssl/evp.h>
54 #include <openssl/err.h>
57 #include <openssl/aes.h>
58 #include <openssl/modes.h>
61 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
62 const unsigned char *iv, int enc);
69 #define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx)
71 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
72 NID_aes_128, 16, 16, 16, 128,
73 0, aes_init_key, NULL,
74 EVP_CIPHER_set_asn1_iv,
75 EVP_CIPHER_get_asn1_iv,
77 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
78 NID_aes_192, 16, 24, 16, 128,
79 0, aes_init_key, NULL,
80 EVP_CIPHER_set_asn1_iv,
81 EVP_CIPHER_get_asn1_iv,
83 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
84 NID_aes_256, 16, 32, 16, 128,
85 0, aes_init_key, NULL,
86 EVP_CIPHER_set_asn1_iv,
87 EVP_CIPHER_get_asn1_iv,
90 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16)
92 IMPLEMENT_AES_CFBR(128,1)
93 IMPLEMENT_AES_CFBR(192,1)
94 IMPLEMENT_AES_CFBR(256,1)
96 IMPLEMENT_AES_CFBR(128,8)
97 IMPLEMENT_AES_CFBR(192,8)
98 IMPLEMENT_AES_CFBR(256,8)
100 static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
101 const unsigned char *in, size_t len)
106 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
107 size_t blocks, const AES_KEY *key,
108 const unsigned char ivec[AES_BLOCK_SIZE]);
110 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
111 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
112 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
114 CRYPTO_ctr128_encrypt(in,out,len,
115 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
116 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
118 ctx->num = (size_t)num;
122 static const EVP_CIPHER aes_128_ctr_cipher=
124 NID_aes_128_ctr,1,16,16,
136 const EVP_CIPHER *EVP_aes_128_ctr (void)
137 { return &aes_128_ctr_cipher; }
139 static const EVP_CIPHER aes_192_ctr_cipher=
141 NID_aes_192_ctr,1,24,16,
153 const EVP_CIPHER *EVP_aes_192_ctr (void)
154 { return &aes_192_ctr_cipher; }
156 static const EVP_CIPHER aes_256_ctr_cipher=
158 NID_aes_256_ctr,1,32,16,
170 const EVP_CIPHER *EVP_aes_256_ctr (void)
171 { return &aes_256_ctr_cipher; }
173 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
174 const unsigned char *iv, int enc)
178 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
179 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
181 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
183 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
187 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);