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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 | ||
83 | void MDC2_Init(c) | |
84 | MDC2_CTX *c; | |
85 | { | |
86 | c->num=0; | |
87 | c->pad_type=1; | |
88 | memset(&(c->h[0]),0x52,MDC2_BLOCK); | |
89 | memset(&(c->hh[0]),0x25,MDC2_BLOCK); | |
90 | } | |
91 | ||
92 | void MDC2_Update(c,in,len) | |
93 | MDC2_CTX *c; | |
94 | register unsigned char *in; | |
95 | unsigned long len; | |
96 | { | |
97 | int i,j; | |
98 | ||
99 | i=c->num; | |
100 | if (i != 0) | |
101 | { | |
102 | if (i+len < MDC2_BLOCK) | |
103 | { | |
104 | /* partial block */ | |
105 | memcpy(&(c->data[i]),in,(int)len); | |
106 | c->num+=(int)len; | |
107 | return; | |
108 | } | |
109 | else | |
110 | { | |
111 | /* filled one */ | |
112 | j=MDC2_BLOCK-i; | |
113 | memcpy(&(c->data[i]),in,j); | |
114 | len-=j; | |
115 | in+=j; | |
116 | c->num=0; | |
117 | mdc2_body(c,&(c->data[0]),MDC2_BLOCK); | |
118 | } | |
119 | } | |
120 | i=(int)(len&(unsigned long)~(MDC2_BLOCK-1)); | |
121 | if (i > 0) mdc2_body(c,in,i); | |
122 | j=(int)len-i; | |
123 | if (j > 0) | |
124 | { | |
125 | memcpy(&(c->data[0]),&(in[i]),j); | |
126 | c->num=j; | |
127 | } | |
128 | } | |
129 | ||
130 | static void mdc2_body(c,in,len) | |
131 | MDC2_CTX *c; | |
132 | unsigned char *in; | |
133 | unsigned int len; | |
134 | { | |
135 | register DES_LONG tin0,tin1; | |
136 | register DES_LONG ttin0,ttin1; | |
137 | DES_LONG d[2],dd[2]; | |
138 | des_cblock *h,*hh; | |
139 | des_key_schedule k; | |
140 | unsigned char *p; | |
141 | unsigned int i; | |
142 | ||
143 | h= (des_cblock *)&(c->h[0]); | |
144 | hh= (des_cblock *)&(c->hh[0]); | |
145 | ||
146 | for (i=0; i<len; i+=8) | |
147 | { | |
148 | c2l(in,tin0); d[0]=dd[0]=tin0; | |
149 | c2l(in,tin1); d[1]=dd[1]=tin1; | |
150 | (*h)[0]=((*h)[0]&0x9f)|0x40; | |
151 | (*hh)[0]=((*hh)[0]&0x9f)|0x20; | |
152 | ||
dfeab068 | 153 | des_set_odd_parity(h); |
d02b48c6 RE |
154 | des_set_key(h,k); |
155 | des_encrypt((DES_LONG *)d,k,1); | |
156 | ||
dfeab068 | 157 | des_set_odd_parity(hh); |
d02b48c6 RE |
158 | des_set_key(hh,k); |
159 | des_encrypt((DES_LONG *)dd,k,1); | |
160 | ||
161 | ttin0=tin0^dd[0]; | |
162 | ttin1=tin1^dd[1]; | |
163 | tin0^=d[0]; | |
164 | tin1^=d[1]; | |
165 | ||
166 | p=(unsigned char *)h; | |
167 | l2c(tin0,p); | |
168 | l2c(ttin1,p); | |
169 | p=(unsigned char *)hh; | |
170 | l2c(ttin0,p); | |
171 | l2c(tin1,p); | |
172 | } | |
173 | } | |
174 | ||
175 | void MDC2_Final(md,c) | |
176 | unsigned char *md; | |
177 | MDC2_CTX *c; | |
178 | { | |
179 | int i,j; | |
180 | ||
181 | i=c->num; | |
182 | j=c->pad_type; | |
183 | if ((i > 0) || (j == 2)) | |
184 | { | |
185 | if (j == 2) | |
186 | c->data[i++]=0x80; | |
187 | memset(&(c->data[i]),0,MDC2_BLOCK-i); | |
188 | mdc2_body(c,c->data,MDC2_BLOCK); | |
189 | } | |
190 | memcpy(md,(char *)c->h,MDC2_BLOCK); | |
191 | memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK); | |
192 | } | |
193 | ||
194 | #undef TEST | |
195 | ||
196 | #ifdef TEST | |
197 | main() | |
198 | { | |
199 | unsigned char md[MDC2_DIGEST_LENGTH]; | |
200 | int i; | |
201 | MDC2_CTX c; | |
202 | static char *text="Now is the time for all "; | |
203 | ||
204 | MDC2_Init(&c); | |
205 | MDC2_Update(&c,text,strlen(text)); | |
206 | MDC2_Final(&(md[0]),&c); | |
207 | ||
208 | for (i=0; i<MDC2_DIGEST_LENGTH; i++) | |
209 | printf("%02X",md[i]); | |
210 | printf("\n"); | |
211 | } | |
212 | ||
213 | #endif |