[thirdparty/openssl.git] / crypto / evp / e_rc2.c

/* crypto/evp/e_rc2.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 OPENSSL_NO_RC2

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/evp.h>
#include <openssl/objects.h>
#include "evp_locl.h"

static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
			const unsigned char *iv,int enc);
static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx);
static int rc2_magic_to_meth(int i);
static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);

IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2,
			8,
			EVP_RC2_KEY_SIZE, 8,
			EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
			rc2_init_key, NULL,
			rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, 
			rc2_ctrl)

#define RC2_40_MAGIC	0xa0
#define RC2_64_MAGIC	0x78
#define RC2_128_MAGIC	0x3a

static EVP_CIPHER r2_64_cbc_cipher=
	{
	NID_rc2_64_cbc,
	8,8 /* 64 bit */,8,
	EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
	rc2_init_key,
	rc2_cbc_cipher,
	NULL,
	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
		sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
	rc2_set_asn1_type_and_iv,
	rc2_get_asn1_type_and_iv,
	rc2_ctrl,
	NULL
	};

static EVP_CIPHER r2_40_cbc_cipher=
	{
	NID_rc2_40_cbc,
	8,5 /* 40 bit */,8,
	EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
	rc2_init_key,
	rc2_cbc_cipher,
	NULL,
	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
		sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
	rc2_set_asn1_type_and_iv,
	rc2_get_asn1_type_and_iv,
	rc2_ctrl,
	NULL
	};

EVP_CIPHER *EVP_rc2_64_cbc(void)
	{
	return(&r2_64_cbc_cipher);
	}

EVP_CIPHER *EVP_rc2_40_cbc(void)
	{
	return(&r2_40_cbc_cipher);
	}
	
static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
			const unsigned char *iv, int enc)
	{
	RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
			key,ctx->c.rc2.key_bits);
	return 1;
	}

static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
	{
	int i;

	EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i);
	if 	(i == 128) return(RC2_128_MAGIC);
	else if (i == 64)  return(RC2_64_MAGIC);
	else if (i == 40)  return(RC2_40_MAGIC);
	else return(0);
	}

static int rc2_magic_to_meth(int i)
	{
	if      (i == RC2_128_MAGIC) return 128;
	else if (i == RC2_64_MAGIC)  return 64;
	else if (i == RC2_40_MAGIC)  return 40;
	else
		{
		EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
		return(0);
		}
	}

static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
	{
	long num=0;
	int i=0,l;
	int key_bits;
	unsigned char iv[EVP_MAX_IV_LENGTH];

	if (type != NULL)
		{
		l=EVP_CIPHER_CTX_iv_length(c);
		i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l);
		if (i != l)
			return(-1);
		key_bits =rc2_magic_to_meth((int)num);
		if (!key_bits)
			return(-1);
		if(i > 0) EVP_CipherInit(c, NULL, NULL, iv, -1);
		EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL);
		EVP_CIPHER_CTX_set_key_length(c, key_bits / 8);
		}
	return(i);
	}

static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
	{
	long num;
	int i=0,j;

	if (type != NULL)
		{
		num=rc2_meth_to_magic(c);
		j=EVP_CIPHER_CTX_iv_length(c);
		i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
		}
	return(i);
	}

static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
	{
		switch(type) {

			case EVP_CTRL_INIT:
			c->c.rc2.key_bits = EVP_CIPHER_CTX_key_length(c) * 8;
			return 1;

			case EVP_CTRL_GET_RC2_KEY_BITS:
			*(int *)ptr = c->c.rc2.key_bits;
			return 1;
			
			
			case EVP_CTRL_SET_RC2_KEY_BITS:
			if(arg > 0) {
				c->c.rc2.key_bits = arg;
				return 1;
			}
			return 0;

			default:
			return -1;
		}
	}

#endif
Commit	Line	Data
57ae2e24	1	/* crypto/evp/e_rc2.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
cf1b7d96	59	#ifndef OPENSSL_NO_RC2
d02b48c6 RE	60
	61	#include <stdio.h>
	62	#include "cryptlib.h"
ec577822 BM	63	#include <openssl/evp.h>
ec577822 BM	64	#include <openssl/objects.h>
57ae2e24	65	#include "evp_locl.h"
d02b48c6	66
1921eaad BL	67	static int rc2_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
1921eaad BL	68	const unsigned char *iv,int enc);
49528751 DSH	69	static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx);
49528751 DSH	70	static int rc2_magic_to_meth(int i);
dfeab068 RE	71	static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type);
dfeab068 RE	72	static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type);
49528751	73	static int rc2_ctrl(EVP_CIPHER_CTX c, int type, int arg, void ptr);
dfeab068	74
57ae2e24 DSH	75	IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2,
	76	8,
	77	EVP_RC2_KEY_SIZE, 8,
49528751 DSH	78	EVP_CIPH_VARIABLE_LENGTH \| EVP_CIPH_CTRL_INIT,
	79	rc2_init_key, NULL,
	80	rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv,
	81	rc2_ctrl)
57ae2e24	82
dfeab068 RE	83	#define RC2_40_MAGIC 0xa0
	84	#define RC2_64_MAGIC 0x78
	85	#define RC2_128_MAGIC 0x3a
	86
dfeab068 RE	87	static EVP_CIPHER r2_64_cbc_cipher=
dfeab068 RE	88	{
1b266dab	89	NID_rc2_64_cbc,
dfeab068	90	8,8 /* 64 bit */,8,
49528751	91	EVP_CIPH_CBC_MODE \| EVP_CIPH_VARIABLE_LENGTH \| EVP_CIPH_CTRL_INIT,
57ae2e24	92	rc2_init_key,
dfeab068 RE	93	rc2_cbc_cipher,
	94	NULL,
	95	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
57ae2e24	96	sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
dfeab068 RE	97	rc2_set_asn1_type_and_iv,
dfeab068 RE	98	rc2_get_asn1_type_and_iv,
49528751	99	rc2_ctrl,
7f060601	100	NULL
58964a49 RE	101	};
	102
	103	static EVP_CIPHER r2_40_cbc_cipher=
	104	{
	105	NID_rc2_40_cbc,
	106	8,5 /* 40 bit */,8,
49528751	107	EVP_CIPH_CBC_MODE \| EVP_CIPH_VARIABLE_LENGTH \| EVP_CIPH_CTRL_INIT,
57ae2e24	108	rc2_init_key,
58964a49 RE	109	rc2_cbc_cipher,
	110	NULL,
	111	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
57ae2e24	112	sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
dfeab068 RE	113	rc2_set_asn1_type_and_iv,
dfeab068 RE	114	rc2_get_asn1_type_and_iv,
49528751	115	rc2_ctrl,
7f060601	116	NULL
d02b48c6 RE	117	};
d02b48c6 RE	118
6b691a5c	119	EVP_CIPHER *EVP_rc2_64_cbc(void)
dfeab068 RE	120	{
	121	return(&r2_64_cbc_cipher);
	122	}
	123
6b691a5c	124	EVP_CIPHER *EVP_rc2_40_cbc(void)
58964a49 RE	125	{
	126	return(&r2_40_cbc_cipher);
	127	}
d02b48c6	128
1921eaad BL	129	static int rc2_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
1921eaad BL	130	const unsigned char *iv, int enc)
d02b48c6	131	{
57ae2e24	132	RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
49528751	133	key,ctx->c.rc2.key_bits);
be06a934	134	return 1;
d02b48c6 RE	135	}
d02b48c6 RE	136
49528751	137	static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
dfeab068 RE	138	{
	139	int i;
	140
49528751 DSH	141	EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i);
	142	if (i == 128) return(RC2_128_MAGIC);
	143	else if (i == 64) return(RC2_64_MAGIC);
	144	else if (i == 40) return(RC2_40_MAGIC);
dfeab068 RE	145	else return(0);
	146	}
	147
49528751	148	static int rc2_magic_to_meth(int i)
dfeab068	149	{
49528751 DSH	150	if (i == RC2_128_MAGIC) return 128;
	151	else if (i == RC2_64_MAGIC) return 64;
	152	else if (i == RC2_40_MAGIC) return 40;
dfeab068 RE	153	else
	154	{
	155	EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
49528751	156	return(0);
dfeab068 RE	157	}
	158	}
	159
6b691a5c	160	static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type)
dfeab068 RE	161	{
	162	long num=0;
	163	int i=0,l;
49528751 DSH	164	int key_bits;
49528751 DSH	165	unsigned char iv[EVP_MAX_IV_LENGTH];
dfeab068 RE	166
	167	if (type != NULL)
	168	{
	169	l=EVP_CIPHER_CTX_iv_length(c);
49528751	170	i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l);
dfeab068 RE	171	if (i != l)
dfeab068 RE	172	return(-1);
49528751 DSH	173	key_bits =rc2_magic_to_meth((int)num);
49528751 DSH	174	if (!key_bits)
dfeab068	175	return(-1);
49528751 DSH	176	if(i > 0) EVP_CipherInit(c, NULL, NULL, iv, -1);
	177	EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL);
	178	EVP_CIPHER_CTX_set_key_length(c, key_bits / 8);
dfeab068 RE	179	}
	180	return(i);
	181	}
	182
6b691a5c	183	static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type)
dfeab068 RE	184	{
	185	long num;
	186	int i=0,j;
	187
	188	if (type != NULL)
	189	{
49528751	190	num=rc2_meth_to_magic(c);
dfeab068 RE	191	j=EVP_CIPHER_CTX_iv_length(c);
	192	i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
	193	}
	194	return(i);
	195	}
	196
49528751 DSH	197	static int rc2_ctrl(EVP_CIPHER_CTX c, int type, int arg, void ptr)
	198	{
	199	switch(type) {
	200
	201	case EVP_CTRL_INIT:
	202	c->c.rc2.key_bits = EVP_CIPHER_CTX_key_length(c) * 8;
	203	return 1;
	204
	205	case EVP_CTRL_GET_RC2_KEY_BITS:
	206	(int )ptr = c->c.rc2.key_bits;
	207	return 1;
	208
	209
	210	case EVP_CTRL_SET_RC2_KEY_BITS:
	211	if(arg > 0) {
	212	c->c.rc2.key_bits = arg;
	213	return 1;
	214	}
	215	return 0;
	216
	217	default:
	218	return -1;
	219	}
	220	}
	221
d02b48c6	222	#endif