[thirdparty/openssl.git] / crypto / evp / e_ofb_i.c

/* crypto/evp/e_ofb_i.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef NO_IDEA

#include <stdio.h>
#include "cryptlib.h"
#include "evp.h"
#include "objects.h"

#ifndef NOPROTO
static void idea_ofb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
	unsigned char *iv,int enc);
static void idea_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
	unsigned char *in, unsigned int inl);
#else
static void idea_ofb_init_key();
static void idea_ofb_cipher();
#endif

static EVP_CIPHER i_ofb_cipher=
	{
	NID_idea_ofb64,
	1,IDEA_KEY_LENGTH,IDEA_BLOCK,
	idea_ofb_init_key,
	idea_ofb_cipher,
	NULL,
	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
		sizeof((((EVP_CIPHER_CTX *)NULL)->c.idea_ks)),
	EVP_CIPHER_set_asn1_iv,
	EVP_CIPHER_get_asn1_iv,
	};

EVP_CIPHER *EVP_idea_ofb()
	{
	return(&i_ofb_cipher);
	}
	
static void idea_ofb_init_key(ctx,key,iv,enc)
EVP_CIPHER_CTX *ctx;
unsigned char *key;
unsigned char *iv;
int enc;
	{
	ctx->num=0;

	if (iv != NULL)
		memcpy(&(ctx->oiv[0]),iv,8);
	memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8);
	if (key != NULL)
		idea_set_encrypt_key(key,&(ctx->c.idea_ks));
	}

static void idea_ofb_cipher(ctx,out,in,inl)
EVP_CIPHER_CTX *ctx;
unsigned char *out;
unsigned char *in;
unsigned int inl;
	{
	idea_ofb64_encrypt(
		in,out,(long)inl,
		&(ctx->c.idea_ks),&(ctx->iv[0]),
		&ctx->num);
	}

#endif
Commit	Line	Data
d02b48c6	1	/* crypto/evp/e_ofb_i.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	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	#ifndef NO_IDEA
	60
	61	#include <stdio.h>
	62	#include "cryptlib.h"
	63	#include "evp.h"
	64	#include "objects.h"
	65
	66	#ifndef NOPROTO
67	static void idea_ofb_init_key(EVP_CIPHER_CTX ctx, unsigned char key,
68	unsigned char *iv,int enc);
69	static void idea_ofb_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
70	unsigned char *in, unsigned int inl);
71	#else
72	static void idea_ofb_init_key();
73	static void idea_ofb_cipher();
74	#endif
75
76	static EVP_CIPHER i_ofb_cipher=
77	{
78	NID_idea_ofb64,
79	1,IDEA_KEY_LENGTH,IDEA_BLOCK,
80	idea_ofb_init_key,
81	idea_ofb_cipher,
58964a49 RE	82	NULL,
	83	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
	84	sizeof((((EVP_CIPHER_CTX *)NULL)->c.idea_ks)),
	85	EVP_CIPHER_set_asn1_iv,
	86	EVP_CIPHER_get_asn1_iv,
d02b48c6 RE	87	};
	88
	89	EVP_CIPHER *EVP_idea_ofb()
	90	{
	91	return(&i_ofb_cipher);
	92	}
	93
	94	static void idea_ofb_init_key(ctx,key,iv,enc)
	95	EVP_CIPHER_CTX *ctx;
	96	unsigned char *key;
	97	unsigned char *iv;
	98	int enc;
	99	{
58964a49	100	ctx->num=0;
d02b48c6 RE	101
d02b48c6 RE	102	if (iv != NULL)
58964a49 RE	103	memcpy(&(ctx->oiv[0]),iv,8);
58964a49 RE	104	memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8);
d02b48c6	105	if (key != NULL)
58964a49	106	idea_set_encrypt_key(key,&(ctx->c.idea_ks));
d02b48c6 RE	107	}
	108
	109	static void idea_ofb_cipher(ctx,out,in,inl)
	110	EVP_CIPHER_CTX *ctx;
	111	unsigned char *out;
	112	unsigned char *in;
	113	unsigned int inl;
	114	{
	115	idea_ofb64_encrypt(
	116	in,out,(long)inl,
58964a49 RE	117	&(ctx->c.idea_ks),&(ctx->iv[0]),
58964a49 RE	118	&ctx->num);
d02b48c6 RE	119	}
	120
	121	#endif