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