1 /* 2 * Copyright 1998-2021 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 * DES low level APIs are deprecated for public use, but still ok for internal 12 * use. 13 */ 14 #include "internal/deprecated.h" 15 16 /* NOCW */ 17 #include <stdio.h> 18 #ifdef _OSD_POSIX 19 # ifndef CHARSET_EBCDIC 20 # define CHARSET_EBCDIC 1 21 # endif 22 #endif 23 #ifdef CHARSET_EBCDIC 24 # include <openssl/ebcdic.h> 25 #endif 26 27 #include <openssl/crypto.h> 28 #include "des_local.h" 29 30 /* 31 * Added more values to handle illegal salt values the way normal crypt() 32 * implementations do. 33 */ 34 static const unsigned char con_salt[128] = { 35 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 36 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 37 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 38 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 39 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 40 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 41 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 42 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 43 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 44 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 45 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 46 0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24, 47 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 48 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 49 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 50 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 51 }; 52 53 static const unsigned char cov_2char[64] = { 54 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 55 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 56 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 57 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 58 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 59 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 60 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 61 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A 62 }; 63 64 char *DES_crypt(const char *buf, const char *salt) 65 { 66 static char buff[14]; 67 68 #ifndef CHARSET_EBCDIC 69 return DES_fcrypt(buf, salt, buff); 70 #else 71 char e_salt[2 + 1]; 72 char e_buf[32 + 1]; /* replace 32 by 8 ? */ 73 char *ret; 74 75 if (salt[0] == '\0' || salt[1] == '\0') 76 return NULL; 77 78 /* Copy salt, convert to ASCII. */ 79 e_salt[0] = salt[0]; 80 e_salt[1] = salt[1]; 81 e_salt[2] = '\0'; 82 ebcdic2ascii(e_salt, e_salt, sizeof(e_salt)); 83 84 /* Convert password to ASCII. */ 85 OPENSSL_strlcpy(e_buf, buf, sizeof(e_buf)); 86 ebcdic2ascii(e_buf, e_buf, sizeof(e_buf)); 87 88 /* Encrypt it (from/to ASCII); if it worked, convert back. */ 89 ret = DES_fcrypt(e_buf, e_salt, buff); 90 if (ret != NULL) 91 ascii2ebcdic(ret, ret, strlen(ret)); 92 93 return ret; 94 #endif 95 } 96 97 char *DES_fcrypt(const char *buf, const char *salt, char *ret) 98 { 99 unsigned int i, j, x, y; 100 DES_LONG Eswap0, Eswap1; 101 DES_LONG out[2], ll; 102 DES_cblock key; 103 DES_key_schedule ks; 104 unsigned char bb[9]; 105 unsigned char *b = bb; 106 unsigned char c, u; 107 108 x = ret[0] = salt[0]; 109 if (x == 0 || x >= sizeof(con_salt)) 110 return NULL; 111 Eswap0 = con_salt[x] << 2; 112 x = ret[1] = salt[1]; 113 if (x == 0 || x >= sizeof(con_salt)) 114 return NULL; 115 Eswap1 = con_salt[x] << 6; 116 117 /* 118 * EAY r=strlen(buf); r=(r+7)/8; 119 */ 120 for (i = 0; i < 8; i++) { 121 c = *(buf++); 122 if (!c) 123 break; 124 key[i] = (c << 1); 125 } 126 for (; i < 8; i++) 127 key[i] = 0; 128 129 DES_set_key_unchecked(&key, &ks); 130 fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1); 131 132 ll = out[0]; 133 l2c(ll, b); 134 ll = out[1]; 135 l2c(ll, b); 136 y = 0; 137 u = 0x80; 138 bb[8] = 0; 139 for (i = 2; i < 13; i++) { 140 c = 0; 141 for (j = 0; j < 6; j++) { 142 c <<= 1; 143 if (bb[y] & u) 144 c |= 1; 145 u >>= 1; 146 if (!u) { 147 y++; 148 u = 0x80; 149 } 150 } 151 ret[i] = cov_2char[c]; 152 } 153 ret[13] = '\0'; 154 return ret; 155 } 156