[thirdparty/openssl.git] / crypto / des / ede_enc.c

/* crypto/des/ede_enc.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 "des_locl.h"

void des_ede3_cbc_encrypt(input, output, length, ks1, ks2, ks3, ivec, enc)
des_cblock (*input);
des_cblock (*output);
long length;
des_key_schedule ks1;
des_key_schedule ks2;
des_key_schedule ks3;
des_cblock (*ivec);
int enc;
	{
	register DES_LONG tin0,tin1;
	register DES_LONG tout0,tout1,xor0,xor1;
	register unsigned char *in,*out;
	register long l=length;
	DES_LONG tin[2];
	unsigned char *iv;

	in=(unsigned char *)input;
	out=(unsigned char *)output;
	iv=(unsigned char *)ivec;

	if (enc)
		{
		c2l(iv,tout0);
		c2l(iv,tout1);
		for (l-=8; l>=0; l-=8)
			{
			c2l(in,tin0);
			c2l(in,tin1);
			tin0^=tout0;
			tin1^=tout1;

			tin[0]=tin0;
			tin[1]=tin1;
			des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
			tout0=tin[0];
			tout1=tin[1];

			l2c(tout0,out);
			l2c(tout1,out);
			}
		if (l != -8)
			{
			c2ln(in,tin0,tin1,l+8);
			tin0^=tout0;
			tin1^=tout1;

			tin[0]=tin0;
			tin[1]=tin1;
			des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
			tout0=tin[0];
			tout1=tin[1];

			l2c(tout0,out);
			l2c(tout1,out);
			}
		iv=(unsigned char *)ivec;
		l2c(tout0,iv);
		l2c(tout1,iv);
		}
	else
		{
		register DES_LONG t0,t1;

		c2l(iv,xor0);
		c2l(iv,xor1);
		for (l-=8; l>=0; l-=8)
			{
			c2l(in,tin0);
			c2l(in,tin1);

			t0=tin0;
			t1=tin1;

			tin[0]=tin0;
			tin[1]=tin1;
			des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
			tout0=tin[0];
			tout1=tin[1];

			tout0^=xor0;
			tout1^=xor1;
			l2c(tout0,out);
			l2c(tout1,out);
			xor0=t0;
			xor1=t1;
			}
		if (l != -8)
			{
			c2l(in,tin0);
			c2l(in,tin1);
			
			t0=tin0;
			t1=tin1;

			tin[0]=tin0;
			tin[1]=tin1;
			des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
			tout0=tin[0];
			tout1=tin[1];
		
			tout0^=xor0;
			tout1^=xor1;
			l2cn(tout0,tout1,out,l+8);
			xor0=t0;
			xor1=t1;
			}

		iv=(unsigned char *)ivec;
		l2c(xor0,iv);
		l2c(xor1,iv);
		}
	tin0=tin1=tout0=tout1=xor0=xor1=0;
	tin[0]=tin[1]=0;
	}

#ifdef undef /* MACRO */
void des_ede2_cbc_encrypt(input, output, length, ks1, ks2, ivec, enc)
des_cblock (*input);
des_cblock (*output);
long length;
des_key_schedule ks1;
des_key_schedule ks2;
des_cblock (*ivec);
int enc;
	{
	des_ede3_cbc_encrypt(input,output,length,ks1,ks2,ks1,ivec,enc);
	}
#endif
Commit	Line	Data
d02b48c6	1	/* crypto/des/ede_enc.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 "des_locl.h"
	60
	61	void des_ede3_cbc_encrypt(input, output, length, ks1, ks2, ks3, ivec, enc)
	62	des_cblock (*input);
	63	des_cblock (*output);
	64	long length;
	65	des_key_schedule ks1;
	66	des_key_schedule ks2;
67	des_key_schedule ks3;
68	des_cblock (*ivec);
69	int enc;
70	{
71	register DES_LONG tin0,tin1;
72	register DES_LONG tout0,tout1,xor0,xor1;
73	register unsigned char in,out;
74	register long l=length;
75	DES_LONG tin[2];
76	unsigned char *iv;
77
78	in=(unsigned char *)input;
79	out=(unsigned char *)output;
80	iv=(unsigned char *)ivec;
81
82	if (enc)
83	{
84	c2l(iv,tout0);
85	c2l(iv,tout1);
86	for (l-=8; l>=0; l-=8)
87	{
88	c2l(in,tin0);
89	c2l(in,tin1);
90	tin0^=tout0;
91	tin1^=tout1;
92
93	tin[0]=tin0;
94	tin[1]=tin1;
95	des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
96	tout0=tin[0];
97	tout1=tin[1];
98
99	l2c(tout0,out);
100	l2c(tout1,out);
101	}
102	if (l != -8)
103	{
104	c2ln(in,tin0,tin1,l+8);
105	tin0^=tout0;
106	tin1^=tout1;
107
108	tin[0]=tin0;
109	tin[1]=tin1;
110	des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
111	tout0=tin[0];
112	tout1=tin[1];
113
114	l2c(tout0,out);
115	l2c(tout1,out);
116	}
117	iv=(unsigned char *)ivec;
118	l2c(tout0,iv);
119	l2c(tout1,iv);
120	}
121	else
122	{
123	register DES_LONG t0,t1;
124
125	c2l(iv,xor0);
126	c2l(iv,xor1);
127	for (l-=8; l>=0; l-=8)
128	{
129	c2l(in,tin0);
130	c2l(in,tin1);
131
132	t0=tin0;
133	t1=tin1;
134
135	tin[0]=tin0;
136	tin[1]=tin1;
137	des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
138	tout0=tin[0];
139	tout1=tin[1];
140
141	tout0^=xor0;
142	tout1^=xor1;
143	l2c(tout0,out);
144	l2c(tout1,out);
145	xor0=t0;
146	xor1=t1;
147	}
148	if (l != -8)
149	{
150	c2l(in,tin0);
151	c2l(in,tin1);
58964a49	152
d02b48c6 RE	153	t0=tin0;
	154	t1=tin1;
	155
	156	tin[0]=tin0;
	157	tin[1]=tin1;
	158	des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
	159	tout0=tin[0];
	160	tout1=tin[1];
58964a49	161
d02b48c6 RE	162	tout0^=xor0;
	163	tout1^=xor1;
	164	l2cn(tout0,tout1,out,l+8);
	165	xor0=t0;
	166	xor1=t1;
	167	}
58964a49	168
d02b48c6 RE	169	iv=(unsigned char *)ivec;
	170	l2c(xor0,iv);
	171	l2c(xor1,iv);
	172	}
	173	tin0=tin1=tout0=tout1=xor0=xor1=0;
	174	tin[0]=tin[1]=0;
	175	}
	176
	177	#ifdef undef /* MACRO */
	178	void des_ede2_cbc_encrypt(input, output, length, ks1, ks2, ivec, enc)
	179	des_cblock (*input);
	180	des_cblock (*output);
	181	long length;
	182	des_key_schedule ks1;
	183	des_key_schedule ks2;
	184	des_cblock (*ivec);
	185	int enc;
	186	{
	187	des_ede3_cbc_encrypt(input,output,length,ks1,ks2,ks1,ivec,enc);
	188	}
	189	#endif
	190