1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include <openssl/md2.h> 14 #include <openssl/opensslv.h> 15 #include <openssl/crypto.h> 16 17 /* 18 * Implemented from RFC1319 The MD2 Message-Digest Algorithm 19 */ 20 21 #define UCHAR unsigned char 22 23 static void md2_block(MD2_CTX *c, const unsigned char *d); 24 /* 25 * The magic S table - I have converted it to hex since it is basically just 26 * a random byte string. 27 */ 28 static const MD2_INT S[256] = { 29 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 30 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 31 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 32 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, 33 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 34 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 35 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 36 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, 37 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 38 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, 39 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 40 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 41 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 42 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, 43 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 44 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 45 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 46 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, 47 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 48 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, 49 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 50 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 51 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 52 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, 53 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 54 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 55 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 56 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, 57 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 58 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, 59 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 60 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14, 61 }; 62 63 const char *MD2_options(void) 64 { 65 if (sizeof(MD2_INT) == 1) 66 return "md2(char)"; 67 else 68 return "md2(int)"; 69 } 70 71 int MD2_Init(MD2_CTX *c) 72 { 73 c->num = 0; 74 memset(c->state, 0, sizeof(c->state)); 75 memset(c->cksm, 0, sizeof(c->cksm)); 76 memset(c->data, 0, sizeof(c->data)); 77 return 1; 78 } 79 80 int MD2_Update(MD2_CTX *c, const unsigned char *data, size_t len) 81 { 82 register UCHAR *p; 83 84 if (len == 0) 85 return 1; 86 87 p = c->data; 88 if (c->num != 0) { 89 if ((c->num + len) >= MD2_BLOCK) { 90 memcpy(&(p[c->num]), data, MD2_BLOCK - c->num); 91 md2_block(c, c->data); 92 data += (MD2_BLOCK - c->num); 93 len -= (MD2_BLOCK - c->num); 94 c->num = 0; 95 /* drop through and do the rest */ 96 } else { 97 memcpy(&(p[c->num]), data, len); 98 /* data+=len; */ 99 c->num += (int)len; 100 return 1; 101 } 102 } 103 /* 104 * we now can process the input data in blocks of MD2_BLOCK chars and 105 * save the leftovers to c->data. 106 */ 107 while (len >= MD2_BLOCK) { 108 md2_block(c, data); 109 data += MD2_BLOCK; 110 len -= MD2_BLOCK; 111 } 112 memcpy(p, data, len); 113 c->num = (int)len; 114 return 1; 115 } 116 117 static void md2_block(MD2_CTX *c, const unsigned char *d) 118 { 119 register MD2_INT t, *sp1, *sp2; 120 register int i, j; 121 MD2_INT state[48]; 122 123 sp1 = c->state; 124 sp2 = c->cksm; 125 j = sp2[MD2_BLOCK - 1]; 126 for (i = 0; i < 16; i++) { 127 state[i] = sp1[i]; 128 state[i + 16] = t = d[i]; 129 state[i + 32] = (t ^ sp1[i]); 130 j = sp2[i] ^= S[t ^ j]; 131 } 132 t = 0; 133 for (i = 0; i < 18; i++) { 134 for (j = 0; j < 48; j += 8) { 135 t = state[j + 0] ^= S[t]; 136 t = state[j + 1] ^= S[t]; 137 t = state[j + 2] ^= S[t]; 138 t = state[j + 3] ^= S[t]; 139 t = state[j + 4] ^= S[t]; 140 t = state[j + 5] ^= S[t]; 141 t = state[j + 6] ^= S[t]; 142 t = state[j + 7] ^= S[t]; 143 } 144 t = (t + i) & 0xff; 145 } 146 memcpy(sp1, state, 16 * sizeof(MD2_INT)); 147 OPENSSL_cleanse(state, 48 * sizeof(MD2_INT)); 148 } 149 150 int MD2_Final(unsigned char *md, MD2_CTX *c) 151 { 152 int i, v; 153 register UCHAR *cp; 154 register MD2_INT *p1, *p2; 155 156 cp = c->data; 157 p1 = c->state; 158 p2 = c->cksm; 159 v = MD2_BLOCK - c->num; 160 for (i = c->num; i < MD2_BLOCK; i++) 161 cp[i] = (UCHAR) v; 162 163 md2_block(c, cp); 164 165 for (i = 0; i < MD2_BLOCK; i++) 166 cp[i] = (UCHAR) p2[i]; 167 md2_block(c, cp); 168 169 for (i = 0; i < 16; i++) 170 md[i] = (UCHAR) (p1[i] & 0xff); 171 OPENSSL_cleanse(c, sizeof(*c)); 172 return 1; 173 } 174