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 #ifndef OPENSSL_NO_AES 52 #include <openssl/evp.h> 53 #include <openssl/err.h> 54 #include <string.h> 55 #include <openssl/aes.h> 56 #include "evp_locl.h" 57 58 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 59 const unsigned char *iv, int enc); 60 61 typedef struct 62 { 63 AES_KEY ks; 64 } EVP_AES_KEY; 65 66 #define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) 67 68 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, 69 NID_aes_128, 16, 16, 16, 128, 70 0, aes_init_key, NULL, 71 EVP_CIPHER_set_asn1_iv, 72 EVP_CIPHER_get_asn1_iv, 73 NULL) 74 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, 75 NID_aes_192, 16, 24, 16, 128, 76 0, aes_init_key, NULL, 77 EVP_CIPHER_set_asn1_iv, 78 EVP_CIPHER_get_asn1_iv, 79 NULL) 80 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, 81 NID_aes_256, 16, 32, 16, 128, 82 0, aes_init_key, NULL, 83 EVP_CIPHER_set_asn1_iv, 84 EVP_CIPHER_get_asn1_iv, 85 NULL) 86 87 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) 88 89 IMPLEMENT_AES_CFBR(128,1) 90 IMPLEMENT_AES_CFBR(192,1) 91 IMPLEMENT_AES_CFBR(256,1) 92 93 IMPLEMENT_AES_CFBR(128,8) 94 IMPLEMENT_AES_CFBR(192,8) 95 IMPLEMENT_AES_CFBR(256,8) 96 97 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 98 const unsigned char *iv, int enc) 99 { 100 int ret; 101 102 if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE 103 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE 104 || enc) 105 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 106 else 107 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 108 109 if(ret < 0) 110 { 111 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); 112 return 0; 113 } 114 115 return 1; 116 } 117 118 #endif 119