1 /* crypto/evp/e_idea.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 "cryptlib.h" 61 62 #ifndef OPENSSL_NO_IDEA 63 #include <openssl/evp.h> 64 #include <openssl/objects.h> 65 #include "evp_locl.h" 66 #include <openssl/idea.h> 67 68 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 69 const unsigned char *iv,int enc); 70 71 /* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special 72 * case 73 */ 74 75 static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 76 const unsigned char *in, size_t inl) 77 { 78 BLOCK_CIPHER_ecb_loop() 79 idea_ecb_encrypt(in + i, out + i, ctx->cipher_data); 80 return 1; 81 } 82 83 /* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */ 84 85 typedef struct 86 { 87 IDEA_KEY_SCHEDULE ks; 88 } EVP_IDEA_KEY; 89 90 BLOCK_CIPHER_func_cbc(idea, idea, EVP_IDEA_KEY, ks) 91 BLOCK_CIPHER_func_ofb(idea, idea, 64, EVP_IDEA_KEY, ks) 92 BLOCK_CIPHER_func_cfb(idea, idea, 64, EVP_IDEA_KEY, ks) 93 94 BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64, 95 0, idea_init_key, NULL, 96 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) 97 98 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 99 const unsigned char *iv, int enc) 100 { 101 if(!enc) { 102 if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) enc = 1; 103 else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) enc = 1; 104 } 105 if (enc) idea_set_encrypt_key(key,ctx->cipher_data); 106 else 107 { 108 IDEA_KEY_SCHEDULE tmp; 109 110 idea_set_encrypt_key(key,&tmp); 111 idea_set_decrypt_key(&tmp,ctx->cipher_data); 112 OPENSSL_cleanse((unsigned char *)&tmp, 113 sizeof(IDEA_KEY_SCHEDULE)); 114 } 115 return 1; 116 } 117 118 #endif 119
