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 #include <openssl/crypto.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 fips_md_init(MDC2) 80 { 81 c->num=0; 82 c->pad_type=1; 83 memset(&(c->h[0]),0x52,MDC2_BLOCK); 84 memset(&(c->hh[0]),0x25,MDC2_BLOCK); 85 return 1; 86 } 87 88 int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len) 89 { 90 size_t i,j; 91 92 i=c->num; 93 if (i != 0) 94 { 95 if (i+len < MDC2_BLOCK) 96 { 97 /* partial block */ 98 memcpy(&(c->data[i]),in,len); 99 c->num+=(int)len; 100 return 1; 101 } 102 else 103 { 104 /* filled one */ 105 j=MDC2_BLOCK-i; 106 memcpy(&(c->data[i]),in,j); 107 len-=j; 108 in+=j; 109 c->num=0; 110 mdc2_body(c,&(c->data[0]),MDC2_BLOCK); 111 } 112 } 113 i=len&~((size_t)MDC2_BLOCK-1); 114 if (i > 0) mdc2_body(c,in,i); 115 j=len-i; 116 if (j > 0) 117 { 118 memcpy(&(c->data[0]),&(in[i]),j); 119 c->num=(int)j; 120 } 121 return 1; 122 } 123 124 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 for (i=0; i<len; i+=8) 134 { 135 c2l(in,tin0); d[0]=dd[0]=tin0; 136 c2l(in,tin1); d[1]=dd[1]=tin1; 137 c->h[0]=(c->h[0]&0x9f)|0x40; 138 c->hh[0]=(c->hh[0]&0x9f)|0x20; 139 140 DES_set_odd_parity(&c->h); 141 DES_set_key_unchecked(&c->h,&k); 142 DES_encrypt1(d,&k,1); 143 144 DES_set_odd_parity(&c->hh); 145 DES_set_key_unchecked(&c->hh,&k); 146 DES_encrypt1(dd,&k,1); 147 148 ttin0=tin0^dd[0]; 149 ttin1=tin1^dd[1]; 150 tin0^=d[0]; 151 tin1^=d[1]; 152 153 p=c->h; 154 l2c(tin0,p); 155 l2c(ttin1,p); 156 p=c->hh; 157 l2c(ttin0,p); 158 l2c(tin1,p); 159 } 160 } 161 162 int MDC2_Final(unsigned char *md, MDC2_CTX *c) 163 { 164 unsigned int i; 165 int j; 166 167 i=c->num; 168 j=c->pad_type; 169 if ((i > 0) || (j == 2)) 170 { 171 if (j == 2) 172 c->data[i++]=0x80; 173 memset(&(c->data[i]),0,MDC2_BLOCK-i); 174 mdc2_body(c,c->data,MDC2_BLOCK); 175 } 176 memcpy(md,(char *)c->h,MDC2_BLOCK); 177 memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK); 178 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 201
