md2_dgst.c revision 331638
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 66const char MD2_version[] = "MD2" OPENSSL_VERSION_PTEXT; 67 68/* 69 * Implemented from RFC1319 The MD2 Message-Digest Algorithm 70 */ 71 72#define UCHAR unsigned char 73 74static void md2_block(MD2_CTX *c, const unsigned char *d); 75/* 76 * The magic S table - I have converted it to hex since it is basically just 77 * a random byte string. 78 */ 79static const MD2_INT S[256] = { 80 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 81 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 82 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 83 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, 84 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 85 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 86 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 87 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, 88 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 89 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, 90 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 91 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 92 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 93 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, 94 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 95 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 96 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 97 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, 98 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 99 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, 100 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 101 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 102 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 103 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, 104 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 105 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 106 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 107 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, 108 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 109 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, 110 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 111 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14, 112}; 113 114const char *MD2_options(void) 115{ 116 if (sizeof(MD2_INT) == 1) 117 return ("md2(char)"); 118 else 119 return ("md2(int)"); 120} 121 122fips_md_init(MD2) 123{ 124 c->num = 0; 125 memset(c->state, 0, sizeof(c->state)); 126 memset(c->cksm, 0, sizeof(c->cksm)); 127 memset(c->data, 0, sizeof(c->data)); 128 return 1; 129} 130 131int MD2_Update(MD2_CTX *c, const unsigned char *data, size_t len) 132{ 133 register UCHAR *p; 134 135 if (len == 0) 136 return 1; 137 138 p = c->data; 139 if (c->num != 0) { 140 if ((c->num + len) >= MD2_BLOCK) { 141 memcpy(&(p[c->num]), data, MD2_BLOCK - c->num); 142 md2_block(c, c->data); 143 data += (MD2_BLOCK - c->num); 144 len -= (MD2_BLOCK - c->num); 145 c->num = 0; 146 /* drop through and do the rest */ 147 } else { 148 memcpy(&(p[c->num]), data, len); 149 /* data+=len; */ 150 c->num += (int)len; 151 return 1; 152 } 153 } 154 /* 155 * we now can process the input data in blocks of MD2_BLOCK chars and 156 * save the leftovers to c->data. 157 */ 158 while (len >= MD2_BLOCK) { 159 md2_block(c, data); 160 data += MD2_BLOCK; 161 len -= MD2_BLOCK; 162 } 163 memcpy(p, data, len); 164 c->num = (int)len; 165 return 1; 166} 167 168static void md2_block(MD2_CTX *c, const unsigned char *d) 169{ 170 register MD2_INT t, *sp1, *sp2; 171 register int i, j; 172 MD2_INT state[48]; 173 174 sp1 = c->state; 175 sp2 = c->cksm; 176 j = sp2[MD2_BLOCK - 1]; 177 for (i = 0; i < 16; i++) { 178 state[i] = sp1[i]; 179 state[i + 16] = t = d[i]; 180 state[i + 32] = (t ^ sp1[i]); 181 j = sp2[i] ^= S[t ^ j]; 182 } 183 t = 0; 184 for (i = 0; i < 18; i++) { 185 for (j = 0; j < 48; j += 8) { 186 t = state[j + 0] ^= S[t]; 187 t = state[j + 1] ^= S[t]; 188 t = state[j + 2] ^= S[t]; 189 t = state[j + 3] ^= S[t]; 190 t = state[j + 4] ^= S[t]; 191 t = state[j + 5] ^= S[t]; 192 t = state[j + 6] ^= S[t]; 193 t = state[j + 7] ^= S[t]; 194 } 195 t = (t + i) & 0xff; 196 } 197 memcpy(sp1, state, 16 * sizeof(MD2_INT)); 198 OPENSSL_cleanse(state, 48 * sizeof(MD2_INT)); 199} 200 201int MD2_Final(unsigned char *md, MD2_CTX *c) 202{ 203 int i, v; 204 register UCHAR *cp; 205 register MD2_INT *p1, *p2; 206 207 cp = c->data; 208 p1 = c->state; 209 p2 = c->cksm; 210 v = MD2_BLOCK - c->num; 211 for (i = c->num; i < MD2_BLOCK; i++) 212 cp[i] = (UCHAR) v; 213 214 md2_block(c, cp); 215 216 for (i = 0; i < MD2_BLOCK; i++) 217 cp[i] = (UCHAR) p2[i]; 218 md2_block(c, cp); 219 220 for (i = 0; i < 16; i++) 221 md[i] = (UCHAR) (p1[i] & 0xff); 222 OPENSSL_cleanse(c, sizeof(*c)); 223 return 1; 224} 225