md2_dgst.c revision 296465
1/* crypto/md2/md2_dgst.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/md2.h> 63#include <openssl/opensslv.h> 64#include <openssl/crypto.h> 65#ifdef OPENSSL_FIPS 66# include <openssl/fips.h> 67#endif 68 69#include <openssl/err.h> 70 71const char MD2_version[] = "MD2" OPENSSL_VERSION_PTEXT; 72 73/* 74 * Implemented from RFC1319 The MD2 Message-Digest Algorithm 75 */ 76 77#define UCHAR unsigned char 78 79static void md2_block(MD2_CTX *c, const unsigned char *d); 80/* 81 * The magic S table - I have converted it to hex since it is basically just 82 * a random byte string. 83 */ 84static MD2_INT S[256] = { 85 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 86 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 87 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 88 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, 89 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 90 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 91 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 92 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, 93 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 94 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, 95 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 96 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 97 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 98 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, 99 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 100 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 101 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 102 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, 103 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 104 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, 105 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 106 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 107 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 108 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, 109 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 110 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 111 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 112 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, 113 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 114 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, 115 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 116 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14, 117}; 118 119const char *MD2_options(void) 120{ 121 if (sizeof(MD2_INT) == 1) 122 return ("md2(char)"); 123 else 124 return ("md2(int)"); 125} 126 127FIPS_NON_FIPS_MD_Init(MD2) 128{ 129 c->num = 0; 130 memset(c->state, 0, sizeof c->state); 131 memset(c->cksm, 0, sizeof c->cksm); 132 memset(c->data, 0, sizeof c->data); 133 return 1; 134} 135 136int MD2_Update(MD2_CTX *c, const unsigned char *data, size_t len) 137{ 138 register UCHAR *p; 139 140 if (len == 0) 141 return 1; 142 143 p = c->data; 144 if (c->num != 0) { 145 if ((c->num + len) >= MD2_BLOCK) { 146 memcpy(&(p[c->num]), data, MD2_BLOCK - c->num); 147 md2_block(c, c->data); 148 data += (MD2_BLOCK - c->num); 149 len -= (MD2_BLOCK - c->num); 150 c->num = 0; 151 /* drop through and do the rest */ 152 } else { 153 memcpy(&(p[c->num]), data, len); 154 /* data+=len; */ 155 c->num += (int)len; 156 return 1; 157 } 158 } 159 /* 160 * we now can process the input data in blocks of MD2_BLOCK chars and 161 * save the leftovers to c->data. 162 */ 163 while (len >= MD2_BLOCK) { 164 md2_block(c, data); 165 data += MD2_BLOCK; 166 len -= MD2_BLOCK; 167 } 168 memcpy(p, data, len); 169 c->num = (int)len; 170 return 1; 171} 172 173static void md2_block(MD2_CTX *c, const unsigned char *d) 174{ 175 register MD2_INT t, *sp1, *sp2; 176 register int i, j; 177 MD2_INT state[48]; 178 179 sp1 = c->state; 180 sp2 = c->cksm; 181 j = sp2[MD2_BLOCK - 1]; 182 for (i = 0; i < 16; i++) { 183 state[i] = sp1[i]; 184 state[i + 16] = t = d[i]; 185 state[i + 32] = (t ^ sp1[i]); 186 j = sp2[i] ^= S[t ^ j]; 187 } 188 t = 0; 189 for (i = 0; i < 18; i++) { 190 for (j = 0; j < 48; j += 8) { 191 t = state[j + 0] ^= S[t]; 192 t = state[j + 1] ^= S[t]; 193 t = state[j + 2] ^= S[t]; 194 t = state[j + 3] ^= S[t]; 195 t = state[j + 4] ^= S[t]; 196 t = state[j + 5] ^= S[t]; 197 t = state[j + 6] ^= S[t]; 198 t = state[j + 7] ^= S[t]; 199 } 200 t = (t + i) & 0xff; 201 } 202 memcpy(sp1, state, 16 * sizeof(MD2_INT)); 203 OPENSSL_cleanse(state, 48 * sizeof(MD2_INT)); 204} 205 206int MD2_Final(unsigned char *md, MD2_CTX *c) 207{ 208 int i, v; 209 register UCHAR *cp; 210 register MD2_INT *p1, *p2; 211 212 cp = c->data; 213 p1 = c->state; 214 p2 = c->cksm; 215 v = MD2_BLOCK - c->num; 216 for (i = c->num; i < MD2_BLOCK; i++) 217 cp[i] = (UCHAR) v; 218 219 md2_block(c, cp); 220 221 for (i = 0; i < MD2_BLOCK; i++) 222 cp[i] = (UCHAR) p2[i]; 223 md2_block(c, cp); 224 225 for (i = 0; i < 16; i++) 226 md[i] = (UCHAR) (p1[i] & 0xff); 227 memset((char *)&c, 0, sizeof(c)); 228 return 1; 229} 230