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d02b48c6 | 1 | /* crypto/mdc2/mdc2dgst.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 <stdlib.h> | |
61 | #include <string.h> | |
62 | #include "des.h" | |
63 | #include "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 | #ifndef NOPROTO | |
78 | static void mdc2_body(MDC2_CTX *c, unsigned char *in, unsigned int len); | |
79 | #else | |
80 | static void mdc2_body(); | |
81 | #endif | |
82 | ||
6b691a5c | 83 | void MDC2_Init(MDC2_CTX *c) |
d02b48c6 RE |
84 | { |
85 | c->num=0; | |
86 | c->pad_type=1; | |
87 | memset(&(c->h[0]),0x52,MDC2_BLOCK); | |
88 | memset(&(c->hh[0]),0x25,MDC2_BLOCK); | |
89 | } | |
90 | ||
6b691a5c | 91 | void MDC2_Update(MDC2_CTX *c, register unsigned char *in, unsigned long len) |
d02b48c6 RE |
92 | { |
93 | int i,j; | |
94 | ||
95 | i=c->num; | |
96 | if (i != 0) | |
97 | { | |
98 | if (i+len < MDC2_BLOCK) | |
99 | { | |
100 | /* partial block */ | |
101 | memcpy(&(c->data[i]),in,(int)len); | |
102 | c->num+=(int)len; | |
103 | return; | |
104 | } | |
105 | else | |
106 | { | |
107 | /* filled one */ | |
108 | j=MDC2_BLOCK-i; | |
109 | memcpy(&(c->data[i]),in,j); | |
110 | len-=j; | |
111 | in+=j; | |
112 | c->num=0; | |
113 | mdc2_body(c,&(c->data[0]),MDC2_BLOCK); | |
114 | } | |
115 | } | |
116 | i=(int)(len&(unsigned long)~(MDC2_BLOCK-1)); | |
117 | if (i > 0) mdc2_body(c,in,i); | |
118 | j=(int)len-i; | |
119 | if (j > 0) | |
120 | { | |
121 | memcpy(&(c->data[0]),&(in[i]),j); | |
122 | c->num=j; | |
123 | } | |
124 | } | |
125 | ||
6b691a5c | 126 | static void mdc2_body(MDC2_CTX *c, unsigned char *in, unsigned int len) |
d02b48c6 RE |
127 | { |
128 | register DES_LONG tin0,tin1; | |
129 | register DES_LONG ttin0,ttin1; | |
130 | DES_LONG d[2],dd[2]; | |
d02b48c6 RE |
131 | des_key_schedule k; |
132 | unsigned char *p; | |
133 | unsigned int i; | |
134 | ||
d02b48c6 RE |
135 | for (i=0; i<len; i+=8) |
136 | { | |
137 | c2l(in,tin0); d[0]=dd[0]=tin0; | |
138 | c2l(in,tin1); d[1]=dd[1]=tin1; | |
08853ba8 BL |
139 | c->h[0]=(c->h[0]&0x9f)|0x40; |
140 | c->hh[0]=(c->hh[0]&0x9f)|0x20; | |
d02b48c6 | 141 | |
08853ba8 BL |
142 | des_set_odd_parity(c->h); |
143 | des_set_key(c->h,k); | |
4e31df2c | 144 | des_encrypt(d,k,1); |
d02b48c6 | 145 | |
08853ba8 BL |
146 | des_set_odd_parity(c->hh); |
147 | des_set_key(c->hh,k); | |
4e31df2c | 148 | des_encrypt(dd,k,1); |
d02b48c6 RE |
149 | |
150 | ttin0=tin0^dd[0]; | |
151 | ttin1=tin1^dd[1]; | |
152 | tin0^=d[0]; | |
153 | tin1^=d[1]; | |
154 | ||
08853ba8 | 155 | p=c->h; |
d02b48c6 RE |
156 | l2c(tin0,p); |
157 | l2c(ttin1,p); | |
08853ba8 | 158 | p=c->hh; |
d02b48c6 RE |
159 | l2c(ttin0,p); |
160 | l2c(tin1,p); | |
161 | } | |
162 | } | |
163 | ||
6b691a5c | 164 | void MDC2_Final(unsigned char *md, MDC2_CTX *c) |
d02b48c6 RE |
165 | { |
166 | int i,j; | |
167 | ||
168 | i=c->num; | |
169 | j=c->pad_type; | |
170 | if ((i > 0) || (j == 2)) | |
171 | { | |
172 | if (j == 2) | |
173 | c->data[i++]=0x80; | |
174 | memset(&(c->data[i]),0,MDC2_BLOCK-i); | |
175 | mdc2_body(c,c->data,MDC2_BLOCK); | |
176 | } | |
177 | memcpy(md,(char *)c->h,MDC2_BLOCK); | |
178 | memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK); | |
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 |