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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 : :
78 : : static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
79 : 2 : int MDC2_Init(MDC2_CTX *c)
80 : : {
81 : 2 : c->num=0;
82 : 2 : c->pad_type=1;
83 : 2 : memset(&(c->h[0]),0x52,MDC2_BLOCK);
84 : : memset(&(c->hh[0]),0x25,MDC2_BLOCK);
85 : 2 : return 1;
86 : : }
87 : :
88 : 2 : int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
89 : : {
90 : : size_t i,j;
91 : :
92 : 2 : i=c->num;
93 [ - + ]: 2 : if (i != 0)
94 : : {
95 [ # # ]: 0 : if (i+len < MDC2_BLOCK)
96 : : {
97 : : /* partial block */
98 : 0 : memcpy(&(c->data[i]),in,len);
99 : 0 : c->num+=(int)len;
100 : 0 : return 1;
101 : : }
102 : : else
103 : : {
104 : : /* filled one */
105 : 0 : j=MDC2_BLOCK-i;
106 : 0 : memcpy(&(c->data[i]),in,j);
107 : 0 : len-=j;
108 : 0 : in+=j;
109 : 0 : c->num=0;
110 : 0 : mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
111 : : }
112 : : }
113 : 2 : i=len&~((size_t)MDC2_BLOCK-1);
114 [ + - ]: 2 : if (i > 0) mdc2_body(c,in,i);
115 : 2 : j=len-i;
116 [ - + ]: 2 : if (j > 0)
117 : : {
118 : 0 : memcpy(&(c->data[0]),&(in[i]),j);
119 : 0 : c->num=(int)j;
120 : : }
121 : : return 1;
122 : : }
123 : :
124 : 3 : static 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 [ + + ]: 10 : for (i=0; i<len; i+=8)
134 : : {
135 : 7 : c2l(in,tin0); d[0]=dd[0]=tin0;
136 : 7 : c2l(in,tin1); d[1]=dd[1]=tin1;
137 : 7 : c->h[0]=(c->h[0]&0x9f)|0x40;
138 : 7 : c->hh[0]=(c->hh[0]&0x9f)|0x20;
139 : :
140 : 7 : DES_set_odd_parity(&c->h);
141 : 7 : DES_set_key_unchecked(&c->h,&k);
142 : 7 : DES_encrypt1(d,&k,1);
143 : :
144 : 7 : DES_set_odd_parity(&c->hh);
145 : 7 : DES_set_key_unchecked(&c->hh,&k);
146 : 7 : DES_encrypt1(dd,&k,1);
147 : :
148 : 7 : ttin0=tin0^dd[0];
149 : 7 : ttin1=tin1^dd[1];
150 : 7 : tin0^=d[0];
151 : 7 : tin1^=d[1];
152 : :
153 : 7 : p=c->h;
154 : 7 : l2c(tin0,p);
155 : 7 : l2c(ttin1,p);
156 : 7 : p=c->hh;
157 : 7 : l2c(ttin0,p);
158 : 7 : l2c(tin1,p);
159 : : }
160 : 3 : }
161 : :
162 : 2 : int MDC2_Final(unsigned char *md, MDC2_CTX *c)
163 : : {
164 : : unsigned int i;
165 : : int j;
166 : :
167 : 2 : i=c->num;
168 : 2 : j=c->pad_type;
169 [ + + ]: 2 : if ((i > 0) || (j == 2))
170 : : {
171 [ + - ]: 1 : if (j == 2)
172 : 1 : c->data[i++]=0x80;
173 : 1 : memset(&(c->data[i]),0,MDC2_BLOCK-i);
174 : 1 : mdc2_body(c,c->data,MDC2_BLOCK);
175 : : }
176 : 2 : memcpy(md,(char *)c->h,MDC2_BLOCK);
177 : 2 : memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
178 : 2 : return 1;
179 : : }
180 : :
181 : : #undef TEST
182 : :
183 : : #ifdef TEST
184 : : main()
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
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