1 /* crypto/mdc2/mdc2dgst.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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); 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 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 } 122 123 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 } 160 161 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 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
