Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* ==================================================================== |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 2 | * Copyright (c) 2001 The OpenSSL Project. All rights reserved. |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 "evp_locl.h" |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 59 | |
| 60 | static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 61 | const unsigned char *iv, int enc); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 62 | |
| 63 | typedef struct |
| 64 | { |
| 65 | AES_KEY ks; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 66 | } EVP_AES_KEY; |
| 67 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 68 | #define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 69 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 70 | IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, |
| 71 | NID_aes_128, 16, 16, 16, 128, |
| 72 | 0, aes_init_key, NULL, |
| 73 | EVP_CIPHER_set_asn1_iv, |
| 74 | EVP_CIPHER_get_asn1_iv, |
| 75 | NULL) |
| 76 | IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, |
| 77 | NID_aes_192, 16, 24, 16, 128, |
| 78 | 0, aes_init_key, NULL, |
| 79 | EVP_CIPHER_set_asn1_iv, |
| 80 | EVP_CIPHER_get_asn1_iv, |
| 81 | NULL) |
| 82 | IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, |
| 83 | NID_aes_256, 16, 32, 16, 128, |
| 84 | 0, aes_init_key, NULL, |
| 85 | EVP_CIPHER_set_asn1_iv, |
| 86 | EVP_CIPHER_get_asn1_iv, |
| 87 | NULL) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 88 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 89 | #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 90 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 91 | IMPLEMENT_AES_CFBR(128,1) |
| 92 | IMPLEMENT_AES_CFBR(192,1) |
| 93 | IMPLEMENT_AES_CFBR(256,1) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 94 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 95 | IMPLEMENT_AES_CFBR(128,8) |
| 96 | IMPLEMENT_AES_CFBR(192,8) |
| 97 | IMPLEMENT_AES_CFBR(256,8) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 98 | |
| 99 | static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 100 | const unsigned char *iv, int enc) |
| 101 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 102 | int ret; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 103 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 104 | if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE |
| 105 | || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE |
| 106 | || enc) |
| 107 | ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 108 | else |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 109 | ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 110 | |
| 111 | if(ret < 0) |
| 112 | { |
| 113 | EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | return 1; |
| 118 | } |
| 119 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 120 | #endif |