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

/* crypto/evp/e_des.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.]
 */

#include <stdio.h>
#include "cryptlib.h"
#ifndef OPENSSL_NO_DES
#include <openssl/evp.h>
#include <openssl/objects.h>
#include "evp_locl.h"
#include <openssl/des.h>
#include <openssl/rand.h>

static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
			const unsigned char *iv, int enc);
static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);

/* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */

static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			  const unsigned char *in, unsigned int inl)
{
	BLOCK_CIPHER_ecb_loop()
		DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt);
	return 1;
}

static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			  const unsigned char *in, unsigned int inl)
{
	DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num);
	return 1;
}

static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			  const unsigned char *in, unsigned int inl)
{
	DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
			 (DES_cblock *)ctx->iv, ctx->encrypt);
	return 1;
}

static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			    const unsigned char *in, unsigned int inl)
{
	DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
			  (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
	return 1;
}

/* Although we have a CFB-r implementation for DES, it doesn't pack the right
   way, so wrap it here */
static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			   const unsigned char *in, unsigned int inl)
    {
    unsigned int n;
    unsigned char c[1],d[1];

    for(n=0 ; n < inl * 8; ++n)
	{
	c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
	DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
			ctx->encrypt);
	out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
	}
    return 1;
    }

static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			   const unsigned char *in, unsigned int inl)
    {
    DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv,
		    ctx->encrypt);
    return 1;
    }

BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
			EVP_CIPH_RAND_KEY, des_init_key, NULL,
			EVP_CIPHER_set_asn1_iv,
			EVP_CIPHER_get_asn1_iv,
			des_ctrl)

BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1,
		     EVP_CIPH_RAND_KEY, des_init_key,NULL,
		     EVP_CIPHER_set_asn1_iv,
		     EVP_CIPHER_get_asn1_iv,des_ctrl)

BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8,
		     EVP_CIPH_RAND_KEY,des_init_key,NULL,
		     EVP_CIPHER_set_asn1_iv,
		     EVP_CIPHER_get_asn1_iv,des_ctrl)

static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
			const unsigned char *iv, int enc)
	{
	DES_cblock *deskey = (DES_cblock *)key;
#ifdef EVP_CHECK_DES_KEY
	if(DES_set_key_checked(deskey,ctx->cipher_data) != 0)
		return 0;
#else
	DES_set_key_unchecked(deskey,ctx->cipher_data);
#endif
	return 1;
	}

static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
	{
	
	switch(type)
		{
	case EVP_CTRL_RAND_KEY:
		if (RAND_bytes(ptr, 8) <= 0)
			return 0;
		DES_set_odd_parity((DES_cblock *)ptr);
		return 1;

	default:
		return -1;
		}
	}

#endif
Commit	Line	Data
57ae2e24	1	/* crypto/evp/e_des.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	#include <stdio.h>
	60	#include "cryptlib.h"
9e9e8cb6	61	#ifndef OPENSSL_NO_DES
ec577822 BM	62	#include <openssl/evp.h>
ec577822 BM	63	#include <openssl/objects.h>
57ae2e24	64	#include "evp_locl.h"
dbad1690	65	#include <openssl/des.h>
216659eb	66	#include <openssl/rand.h>
d02b48c6	67
1921eaad BL	68	static int des_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
1921eaad BL	69	const unsigned char *iv, int enc);
216659eb	70	static int des_ctrl(EVP_CIPHER_CTX c, int type, int arg, void ptr);
d02b48c6	71
57ae2e24	72	/* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
edf0bfb5	73
1921eaad BL	74	static int des_ecb_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
1921eaad BL	75	const unsigned char *in, unsigned int inl)
57ae2e24 DSH	76	{
57ae2e24 DSH	77	BLOCK_CIPHER_ecb_loop()
c2e4f17c	78	DES_ecb_encrypt((DES_cblock )(in + i), (DES_cblock )(out + i), ctx->cipher_data, ctx->encrypt);
be06a934	79	return 1;
57ae2e24	80	}
d02b48c6	81
1921eaad BL	82	static int des_ofb_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
1921eaad BL	83	const unsigned char *in, unsigned int inl)
57ae2e24	84	{
c2e4f17c	85	DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num);
57ae2e24 DSH	86	return 1;
	87	}
	88
1921eaad BL	89	static int des_cbc_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
1921eaad BL	90	const unsigned char *in, unsigned int inl)
57ae2e24	91	{
c2e4f17c RL	92	DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
c2e4f17c RL	93	(DES_cblock *)ctx->iv, ctx->encrypt);
57ae2e24 DSH	94	return 1;
	95	}
	96
8c6336b0 AP	97	static int des_cfb64_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
8c6336b0 AP	98	const unsigned char *in, unsigned int inl)
57ae2e24	99	{
c2e4f17c RL	100	DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
c2e4f17c RL	101	(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
57ae2e24 DSH	102	return 1;
	103	}
	104
8c6336b0 AP	105	/* Although we have a CFB-r implementation for DES, it doesn't pack the right
	106	way, so wrap it here */
	107	static int des_cfb1_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	108	const unsigned char *in, unsigned int inl)
	109	{
	110	unsigned int n;
	111	unsigned char c[1],d[1];
	112
f8296228	113	for(n=0 ; n < inl * 8; ++n)
8c6336b0 AP	114	{
	115	c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
	116	DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
	117	ctx->encrypt);
	118	out[n/8]=(out[n/8]&~(0x80 >> (n%8)))\|((d[0]&0x80) >> (n%8));
	119	}
	120	return 1;
	121	}
	122
	123	static int des_cfb8_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	124	const unsigned char *in, unsigned int inl)
	125	{
	126	DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv,
	127	ctx->encrypt);
	128	return 1;
	129	}
	130
a6cd8707	131	BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
216659eb	132	EVP_CIPH_RAND_KEY, des_init_key, NULL,
57ae2e24 DSH	133	EVP_CIPHER_set_asn1_iv,
57ae2e24 DSH	134	EVP_CIPHER_get_asn1_iv,
216659eb	135	des_ctrl)
d02b48c6	136
216659eb DSH	137	BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1,
216659eb DSH	138	EVP_CIPH_RAND_KEY, des_init_key,NULL,
8c6336b0	139	EVP_CIPHER_set_asn1_iv,
216659eb	140	EVP_CIPHER_get_asn1_iv,des_ctrl)
8c6336b0	141
216659eb DSH	142	BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8,
216659eb DSH	143	EVP_CIPH_RAND_KEY,des_init_key,NULL,
8c6336b0	144	EVP_CIPHER_set_asn1_iv,
216659eb	145	EVP_CIPHER_get_asn1_iv,des_ctrl)
edf0bfb5	146
1921eaad BL	147	static int des_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
1921eaad BL	148	const unsigned char *iv, int enc)
57ae2e24	149	{
c2e4f17c	150	DES_cblock deskey = (DES_cblock )key;
216659eb DSH	151	#ifdef EVP_CHECK_DES_KEY
	152	if(DES_set_key_checked(deskey,ctx->cipher_data) != 0)
	153	return 0;
	154	#else
c2e4f17c	155	DES_set_key_unchecked(deskey,ctx->cipher_data);
216659eb	156	#endif
be06a934	157	return 1;
d02b48c6	158	}
57ae2e24	159
216659eb DSH	160	static int des_ctrl(EVP_CIPHER_CTX c, int type, int arg, void ptr)
	161	{
	162
	163	switch(type)
	164	{
	165	case EVP_CTRL_RAND_KEY:
	166	if (RAND_bytes(ptr, 8) <= 0)
	167	return 0;
	168	DES_set_odd_parity((DES_cblock *)ptr);
	169	return 1;
	170
	171	default:
	172	return -1;
	173	}
	174	}
	175
d02f751c	176	#endif