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 /* 52 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 53 * Use is subject to license terms. 54 */ 55 56 #pragma ident "%Z%%M% %I% %E% SMI" 57 58 #include <openssl/opensslconf.h> 59 #ifndef OPENSSL_NO_AES 60 #include <openssl/evp.h> 61 #include <openssl/err.h> 62 #include <string.h> 63 #include <assert.h> 64 #include <openssl/aes.h> 65 #include "evp_locl.h" 66 67 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 68 const unsigned char *iv, int enc); 69 70 typedef struct 71 { 72 AES_KEY ks; 73 } EVP_AES_KEY; 74 75 #define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) 76 77 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, 78 NID_aes_128, 16, 16, 16, 128, 79 0, aes_init_key, NULL, 80 EVP_CIPHER_set_asn1_iv, 81 EVP_CIPHER_get_asn1_iv, 82 NULL) 83 #ifdef CRYPTO_UNLIMITED 84 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, 85 NID_aes_192, 16, 24, 16, 128, 86 0, aes_init_key, NULL, 87 EVP_CIPHER_set_asn1_iv, 88 EVP_CIPHER_get_asn1_iv, 89 NULL) 90 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, 91 NID_aes_256, 16, 32, 16, 128, 92 0, aes_init_key, NULL, 93 EVP_CIPHER_set_asn1_iv, 94 EVP_CIPHER_get_asn1_iv, 95 NULL) 96 #endif /* CRYPTO_UNLIMITED */ 97 98 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) 99 100 IMPLEMENT_AES_CFBR(128,1) 101 #ifdef CRYPTO_UNLIMITED 102 IMPLEMENT_AES_CFBR(192,1) 103 IMPLEMENT_AES_CFBR(256,1) 104 #endif /* CRYPTO_UNLIMITED */ 105 106 IMPLEMENT_AES_CFBR(128,8) 107 #ifdef CRYPTO_UNLIMITED 108 IMPLEMENT_AES_CFBR(192,8) 109 IMPLEMENT_AES_CFBR(256,8) 110 #endif /* CRYPTO_UNLIMITED */ 111 112 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 113 const unsigned char *iv, int enc) 114 { 115 int ret; 116 117 #ifndef CRYPTO_UNLIMITED 118 if (ctx->key_len > 16) 119 return 0; 120 #endif /* CRYPTO_UNLIMITED */ 121 122 if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE 123 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE 124 || enc) 125 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 126 else 127 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 128 129 if(ret < 0) 130 { 131 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); 132 return 0; 133 } 134 135 return 1; 136 } 137 138 #endif 139