1 /* 2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 /* 11 * MD2 low level APIs are deprecated for public use, but still ok for 12 * internal use. 13 */ 14 #include "internal/deprecated.h" 15 16 #include <stdio.h> 17 #include <stdlib.h> 18 #include <string.h> 19 #include <openssl/md2.h> 20 #include <openssl/opensslv.h> 21 #include <openssl/crypto.h> 22 23 /* 24 * Implemented from RFC1319 The MD2 Message-Digest Algorithm 25 */ 26 27 #define UCHAR unsigned char 28 29 static void md2_block(MD2_CTX *c, const unsigned char *d); 30 /* 31 * The magic S table - I have converted it to hex since it is basically just 32 * a random byte string. 33 */ 34 static const MD2_INT S[256] = { 35 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 36 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 37 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 38 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, 39 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 40 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 41 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 42 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, 43 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 44 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, 45 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 46 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 47 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 48 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, 49 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 50 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 51 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 52 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, 53 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 54 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, 55 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 56 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 57 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 58 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, 59 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 60 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 61 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 62 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, 63 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 64 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, 65 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 66 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14, 67 }; 68 69 const char *MD2_options(void) 70 { 71 if (sizeof(MD2_INT) == 1) 72 return "md2(char)"; 73 else 74 return "md2(int)"; 75 } 76 77 int MD2_Init(MD2_CTX *c) 78 { 79 c->num = 0; 80 memset(c->state, 0, sizeof(c->state)); 81 memset(c->cksm, 0, sizeof(c->cksm)); 82 memset(c->data, 0, sizeof(c->data)); 83 return 1; 84 } 85 86 int MD2_Update(MD2_CTX *c, const unsigned char *data, size_t len) 87 { 88 register UCHAR *p; 89 90 if (len == 0) 91 return 1; 92 93 p = c->data; 94 if (c->num != 0) { 95 if ((c->num + len) >= MD2_BLOCK) { 96 memcpy(&(p[c->num]), data, MD2_BLOCK - c->num); 97 md2_block(c, c->data); 98 data += (MD2_BLOCK - c->num); 99 len -= (MD2_BLOCK - c->num); 100 c->num = 0; 101 /* drop through and do the rest */ 102 } else { 103 memcpy(&(p[c->num]), data, len); 104 /* data+=len; */ 105 c->num += (int)len; 106 return 1; 107 } 108 } 109 /* 110 * we now can process the input data in blocks of MD2_BLOCK chars and 111 * save the leftovers to c->data. 112 */ 113 while (len >= MD2_BLOCK) { 114 md2_block(c, data); 115 data += MD2_BLOCK; 116 len -= MD2_BLOCK; 117 } 118 memcpy(p, data, len); 119 c->num = (int)len; 120 return 1; 121 } 122 123 static void md2_block(MD2_CTX *c, const unsigned char *d) 124 { 125 register MD2_INT t, *sp1, *sp2; 126 register int i, j; 127 MD2_INT state[48]; 128 129 sp1 = c->state; 130 sp2 = c->cksm; 131 j = sp2[MD2_BLOCK - 1]; 132 for (i = 0; i < 16; i++) { 133 state[i] = sp1[i]; 134 state[i + 16] = t = d[i]; 135 state[i + 32] = (t ^ sp1[i]); 136 j = sp2[i] ^= S[t ^ j]; 137 } 138 t = 0; 139 for (i = 0; i < 18; i++) { 140 for (j = 0; j < 48; j += 8) { 141 t = state[j + 0] ^= S[t]; 142 t = state[j + 1] ^= S[t]; 143 t = state[j + 2] ^= S[t]; 144 t = state[j + 3] ^= S[t]; 145 t = state[j + 4] ^= S[t]; 146 t = state[j + 5] ^= S[t]; 147 t = state[j + 6] ^= S[t]; 148 t = state[j + 7] ^= S[t]; 149 } 150 t = (t + i) & 0xff; 151 } 152 memcpy(sp1, state, 16 * sizeof(MD2_INT)); 153 OPENSSL_cleanse(state, 48 * sizeof(MD2_INT)); 154 } 155 156 int MD2_Final(unsigned char *md, MD2_CTX *c) 157 { 158 int i, v; 159 register UCHAR *cp; 160 register MD2_INT *p1, *p2; 161 162 cp = c->data; 163 p1 = c->state; 164 p2 = c->cksm; 165 v = MD2_BLOCK - c->num; 166 for (i = c->num; i < MD2_BLOCK; i++) 167 cp[i] = (UCHAR) v; 168 169 md2_block(c, cp); 170 171 for (i = 0; i < MD2_BLOCK; i++) 172 cp[i] = (UCHAR) p2[i]; 173 md2_block(c, cp); 174 175 for (i = 0; i < 16; i++) 176 md[i] = (UCHAR) (p1[i] & 0xff); 177 OPENSSL_cleanse(c, sizeof(*c)); 178 return 1; 179 } 180