1/* crypto/mdc2/mdc2dgst.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 <stdlib.h>
61#include <string.h>
62#include <openssl/crypto.h>
63#include <openssl/des.h>
64#include <openssl/mdc2.h>
65
66#undef c2l
67#define c2l(c,l)	(l =((DES_LONG)(*((c)++)))    , \
68			 l|=((DES_LONG)(*((c)++)))<< 8L, \
69			 l|=((DES_LONG)(*((c)++)))<<16L, \
70			 l|=((DES_LONG)(*((c)++)))<<24L)
71
72#undef l2c
73#define l2c(l,c)	(*((c)++)=(unsigned char)(((l)     )&0xff), \
74			*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
75			*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
76			*((c)++)=(unsigned char)(((l)>>24L)&0xff))
77
78static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
79fips_md_init(MDC2)
80	{
81	c->num=0;
82	c->pad_type=1;
83	memset(&(c->h[0]),0x52,MDC2_BLOCK);
84	memset(&(c->hh[0]),0x25,MDC2_BLOCK);
85	return 1;
86	}
87
88int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
89	{
90	size_t i,j;
91
92	i=c->num;
93	if (i != 0)
94		{
95		if (i+len < MDC2_BLOCK)
96			{
97			/* partial block */
98			memcpy(&(c->data[i]),in,len);
99			c->num+=(int)len;
100			return 1;
101			}
102		else
103			{
104			/* filled one */
105			j=MDC2_BLOCK-i;
106			memcpy(&(c->data[i]),in,j);
107			len-=j;
108			in+=j;
109			c->num=0;
110			mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
111			}
112		}
113	i=len&~((size_t)MDC2_BLOCK-1);
114	if (i > 0) mdc2_body(c,in,i);
115	j=len-i;
116	if (j > 0)
117		{
118		memcpy(&(c->data[0]),&(in[i]),j);
119		c->num=(int)j;
120		}
121	return 1;
122	}
123
124static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
125	{
126	register DES_LONG tin0,tin1;
127	register DES_LONG ttin0,ttin1;
128	DES_LONG d[2],dd[2];
129	DES_key_schedule k;
130	unsigned char *p;
131	size_t i;
132
133	for (i=0; i<len; i+=8)
134		{
135		c2l(in,tin0); d[0]=dd[0]=tin0;
136		c2l(in,tin1); d[1]=dd[1]=tin1;
137		c->h[0]=(c->h[0]&0x9f)|0x40;
138		c->hh[0]=(c->hh[0]&0x9f)|0x20;
139
140		DES_set_odd_parity(&c->h);
141		DES_set_key_unchecked(&c->h,&k);
142		DES_encrypt1(d,&k,1);
143
144		DES_set_odd_parity(&c->hh);
145		DES_set_key_unchecked(&c->hh,&k);
146		DES_encrypt1(dd,&k,1);
147
148		ttin0=tin0^dd[0];
149		ttin1=tin1^dd[1];
150		tin0^=d[0];
151		tin1^=d[1];
152
153		p=c->h;
154		l2c(tin0,p);
155		l2c(ttin1,p);
156		p=c->hh;
157		l2c(ttin0,p);
158		l2c(tin1,p);
159		}
160	}
161
162int MDC2_Final(unsigned char *md, MDC2_CTX *c)
163	{
164	unsigned int i;
165	int j;
166
167	i=c->num;
168	j=c->pad_type;
169	if ((i > 0) || (j == 2))
170		{
171		if (j == 2)
172			c->data[i++]=0x80;
173		memset(&(c->data[i]),0,MDC2_BLOCK-i);
174		mdc2_body(c,c->data,MDC2_BLOCK);
175		}
176	memcpy(md,(char *)c->h,MDC2_BLOCK);
177	memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
178	return 1;
179	}
180
181#undef TEST
182
183#ifdef TEST
184main()
185	{
186	unsigned char md[MDC2_DIGEST_LENGTH];
187	int i;
188	MDC2_CTX c;
189	static char *text="Now is the time for all ";
190
191	MDC2_Init(&c);
192	MDC2_Update(&c,text,strlen(text));
193	MDC2_Final(&(md[0]),&c);
194
195	for (i=0; i<MDC2_DIGEST_LENGTH; i++)
196		printf("%02X",md[i]);
197	printf("\n");
198	}
199
200#endif
201