[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 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, unsigned char *key,
	unsigned char *iv,int enc);
static int rc2_meth_to_magic(const EVP_CIPHER *e);
static EVP_CIPHER *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);

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

#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,
	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,
	NULL,
	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,
	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,
	NULL,
	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, unsigned char *key,
	     unsigned char *iv, int enc)
	{
	RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
			key,EVP_CIPHER_key_length(ctx->cipher)*8);
	return 1;
	}

static int rc2_meth_to_magic(const EVP_CIPHER *e)
	{
	int i;

	i=EVP_CIPHER_key_length(e);
	if 	(i == 16) return(RC2_128_MAGIC);
	else if (i == 8)  return(RC2_64_MAGIC);
	else if (i == 5)  return(RC2_40_MAGIC);
	else return(0);
	}

static EVP_CIPHER *rc2_magic_to_meth(int i)
	{
	if      (i == RC2_128_MAGIC) return(EVP_rc2_cbc());
	else if (i == RC2_64_MAGIC)  return(EVP_rc2_64_cbc());
	else if (i == RC2_40_MAGIC)  return(EVP_rc2_40_cbc());
	else
		{
		EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
		return(NULL);
		}
	}

static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
	{
	long num=0;
	int i=0,l;
	EVP_CIPHER *e;

	if (type != NULL)
		{
		l=EVP_CIPHER_CTX_iv_length(c);
		i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l);
		if (i != l)
			return(-1);
		else if (i > 0)
			memcpy(c->iv,c->oiv,l);
		e=rc2_magic_to_meth((int)num);
		if (e == NULL)
			return(-1);
		if (e != EVP_CIPHER_CTX_cipher(c))
			{
			EVP_CIPHER_CTX_cipher(c)=e;
			EVP_CIPHER_CTX_set_key_length(c, EVP_CIPHER_key_length(c));
			rc2_init_key(c,NULL,NULL,1);
			}
		}
	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(EVP_CIPHER_CTX_cipher(c));
		j=EVP_CIPHER_CTX_iv_length(c);
		i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
		}
	return(i);
	}

#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
	59	#ifndef NO_RC2
	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
57ae2e24	67	static int rc2_init_key(EVP_CIPHER_CTX ctx, unsigned char key,
d02b48c6	68	unsigned char *iv,int enc);
e778802f	69	static int rc2_meth_to_magic(const EVP_CIPHER *e);
dfeab068 RE	70	static EVP_CIPHER *rc2_magic_to_meth(int i);
	71	static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type);
	72	static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type);
	73
57ae2e24 DSH	74	IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2,
	75	8,
	76	EVP_RC2_KEY_SIZE, 8,
	77	EVP_CIPH_VARIABLE_LENGTH, rc2_init_key, NULL,
	78	rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, NULL)
	79
dfeab068 RE	80	#define RC2_40_MAGIC 0xa0
	81	#define RC2_64_MAGIC 0x78
	82	#define RC2_128_MAGIC 0x3a
	83
dfeab068 RE	84	static EVP_CIPHER r2_64_cbc_cipher=
dfeab068 RE	85	{
1b266dab	86	NID_rc2_64_cbc,
dfeab068	87	8,8 /* 64 bit */,8,
7f060601	88	EVP_CIPH_CBC_MODE \| EVP_CIPH_VARIABLE_LENGTH,
57ae2e24	89	rc2_init_key,
dfeab068 RE	90	rc2_cbc_cipher,
	91	NULL,
	92	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
57ae2e24	93	sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
dfeab068 RE	94	rc2_set_asn1_type_and_iv,
dfeab068 RE	95	rc2_get_asn1_type_and_iv,
57ae2e24	96	NULL,
7f060601	97	NULL
58964a49 RE	98	};
	99
	100	static EVP_CIPHER r2_40_cbc_cipher=
	101	{
	102	NID_rc2_40_cbc,
	103	8,5 /* 40 bit */,8,
7f060601	104	EVP_CIPH_CBC_MODE \| EVP_CIPH_VARIABLE_LENGTH,
57ae2e24	105	rc2_init_key,
58964a49 RE	106	rc2_cbc_cipher,
	107	NULL,
	108	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
57ae2e24	109	sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
dfeab068 RE	110	rc2_set_asn1_type_and_iv,
dfeab068 RE	111	rc2_get_asn1_type_and_iv,
57ae2e24	112	NULL,
7f060601	113	NULL
d02b48c6 RE	114	};
d02b48c6 RE	115
6b691a5c	116	EVP_CIPHER *EVP_rc2_64_cbc(void)
dfeab068 RE	117	{
	118	return(&r2_64_cbc_cipher);
	119	}
	120
6b691a5c	121	EVP_CIPHER *EVP_rc2_40_cbc(void)
58964a49 RE	122	{
	123	return(&r2_40_cbc_cipher);
	124	}
d02b48c6	125
57ae2e24	126	static int rc2_init_key(EVP_CIPHER_CTX ctx, unsigned char key,
6b691a5c	127	unsigned char *iv, int enc)
d02b48c6	128	{
57ae2e24	129	RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
7f060601	130	key,EVP_CIPHER_key_length(ctx->cipher)*8);
be06a934	131	return 1;
d02b48c6 RE	132	}
d02b48c6 RE	133
6b691a5c	134	static int rc2_meth_to_magic(const EVP_CIPHER *e)
dfeab068 RE	135	{
	136	int i;
	137
	138	i=EVP_CIPHER_key_length(e);
884e8ec6 DSH	139	if (i == 16) return(RC2_128_MAGIC);
	140	else if (i == 8) return(RC2_64_MAGIC);
	141	else if (i == 5) return(RC2_40_MAGIC);
dfeab068 RE	142	else return(0);
	143	}
	144
6b691a5c	145	static EVP_CIPHER *rc2_magic_to_meth(int i)
dfeab068 RE	146	{
	147	if (i == RC2_128_MAGIC) return(EVP_rc2_cbc());
	148	else if (i == RC2_64_MAGIC) return(EVP_rc2_64_cbc());
	149	else if (i == RC2_40_MAGIC) return(EVP_rc2_40_cbc());
	150	else
	151	{
	152	EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
	153	return(NULL);
	154	}
	155	}
	156
6b691a5c	157	static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type)
dfeab068 RE	158	{
	159	long num=0;
	160	int i=0,l;
	161	EVP_CIPHER *e;
	162
	163	if (type != NULL)
	164	{
	165	l=EVP_CIPHER_CTX_iv_length(c);
	166	i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l);
	167	if (i != l)
	168	return(-1);
	169	else if (i > 0)
	170	memcpy(c->iv,c->oiv,l);
	171	e=rc2_magic_to_meth((int)num);
	172	if (e == NULL)
	173	return(-1);
	174	if (e != EVP_CIPHER_CTX_cipher(c))
	175	{
	176	EVP_CIPHER_CTX_cipher(c)=e;
7f060601	177	EVP_CIPHER_CTX_set_key_length(c, EVP_CIPHER_key_length(c));
57ae2e24	178	rc2_init_key(c,NULL,NULL,1);
dfeab068 RE	179	}
	180	}
	181	return(i);
	182	}
	183
6b691a5c	184	static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX c, ASN1_TYPE type)
dfeab068 RE	185	{
	186	long num;
	187	int i=0,j;
	188
	189	if (type != NULL)
	190	{
	191	num=rc2_meth_to_magic(EVP_CIPHER_CTX_cipher(c));
	192	j=EVP_CIPHER_CTX_iv_length(c);
	193	i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
	194	}
	195	return(i);
	196	}
	197
d02b48c6	198	#endif