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/* $OpenBSD: e_idea.c,v 1.10 2015/09/10 15:56:25 jsing Exp $ */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include <string.h> |
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#include <openssl/opensslconf.h> |
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#ifndef OPENSSL_NO_IDEA |
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#include <openssl/evp.h> |
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#include <openssl/idea.h> |
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#include <openssl/objects.h> |
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#include "evp_locl.h" |
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static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc); |
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/* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special |
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* case |
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*/ |
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static int |
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idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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BLOCK_CIPHER_ecb_loop() |
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idea_ecb_encrypt(in + i, out + i, ctx->cipher_data); |
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return 1; |
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} |
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/* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */ |
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typedef struct { |
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IDEA_KEY_SCHEDULE ks; |
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} EVP_IDEA_KEY; |
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BLOCK_CIPHER_func_cbc(idea, idea, EVP_IDEA_KEY, ks) |
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BLOCK_CIPHER_func_ofb(idea, idea, 64, EVP_IDEA_KEY, ks) |
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BLOCK_CIPHER_func_cfb(idea, idea, 64, EVP_IDEA_KEY, ks) |
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BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64, |
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0, idea_init_key, NULL, |
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EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) |
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static int |
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idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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if (!enc) { |
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if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) |
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enc = 1; |
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else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) |
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enc = 1; |
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} |
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if (enc) |
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idea_set_encrypt_key(key, ctx->cipher_data); |
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else { |
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IDEA_KEY_SCHEDULE tmp; |
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idea_set_encrypt_key(key, &tmp); |
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idea_set_decrypt_key(&tmp, ctx->cipher_data); |
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explicit_bzero((unsigned char *)&tmp, |
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sizeof(IDEA_KEY_SCHEDULE)); |
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} |
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return 1; |
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} |
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#endif |