120 lines
4.8 KiB
C
120 lines
4.8 KiB
C
/* crypto/evp/e_idea.c */
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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 "cryptlib.h"
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#ifndef OPENSSL_NO_IDEA
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include "evp_locl.h"
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# include <openssl/idea.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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/*
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* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
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* special case
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*/
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static int 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 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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OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
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}
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return 1;
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}
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#endif
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