1 /* $OpenBSD: e_idea.c,v 1.9 2014/07/11 08:44:48 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include <string.h> 61 62 #include <openssl/opensslconf.h> 63 64 #ifndef OPENSSL_NO_IDEA 65 66 #include <openssl/evp.h> 67 #include <openssl/idea.h> 68 #include <openssl/objects.h> 69 70 #include "evp_locl.h" 71 72 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 73 const unsigned char *iv, int enc); 74 75 /* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special 76 * case 77 */ 78 79 static int 80 idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 81 const unsigned char *in, size_t inl) 82 { 83 BLOCK_CIPHER_ecb_loop() 84 idea_ecb_encrypt(in + i, out + i, ctx->cipher_data); 85 return 1; 86 } 87 88 /* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */ 89 90 typedef struct { 91 IDEA_KEY_SCHEDULE ks; 92 } EVP_IDEA_KEY; 93 94 BLOCK_CIPHER_func_cbc(idea, idea, EVP_IDEA_KEY, ks) 95 BLOCK_CIPHER_func_ofb(idea, idea, 64, EVP_IDEA_KEY, ks) 96 BLOCK_CIPHER_func_cfb(idea, idea, 64, EVP_IDEA_KEY, ks) 97 98 BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64, 99 0, idea_init_key, NULL, 100 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) 101 102 static int 103 idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 104 const unsigned char *iv, int enc) 105 { 106 if (!enc) { 107 if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) 108 enc = 1; 109 else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) 110 enc = 1; 111 } 112 if (enc) 113 idea_set_encrypt_key(key, ctx->cipher_data); 114 else { 115 IDEA_KEY_SCHEDULE tmp; 116 117 idea_set_encrypt_key(key, &tmp); 118 idea_set_decrypt_key(&tmp, ctx->cipher_data); 119 explicit_bzero((unsigned char *)&tmp, 120 sizeof(IDEA_KEY_SCHEDULE)); 121 } 122 return 1; 123 } 124 125 #endif 126