1 /* 2 * Copyright 1998-2026 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, 0xDA, 0xDB, 36 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 37 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 38 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 39 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0x03, 40 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x05, 0x06, 41 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 42 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 43 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 44 0x25, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 45 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 46 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 47 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44 48 }; 49 50 static const unsigned char cov_2char[64] = { 51 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 52 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 53 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 54 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 55 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 56 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 57 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 58 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A 59 }; 60 61 char *DES_crypt(const char *buf, const char *salt) 62 { 63 static char buff[14]; 64 65 #ifndef CHARSET_EBCDIC 66 return DES_fcrypt(buf, salt, buff); 67 #else 68 char e_salt[2 + 1]; 69 char e_buf[32 + 1]; /* replace 32 by 8 ? */ 70 char *ret; 71 72 if (salt[0] == '\0' || salt[1] == '\0') 73 return NULL; 74 75 /* Copy salt, convert to ASCII. */ 76 e_salt[0] = salt[0]; 77 e_salt[1] = salt[1]; 78 e_salt[2] = '\0'; 79 ebcdic2ascii(e_salt, e_salt, sizeof(e_salt)); 80 81 /* Convert password to ASCII. */ 82 OPENSSL_strlcpy(e_buf, buf, sizeof(e_buf)); 83 ebcdic2ascii(e_buf, e_buf, sizeof(e_buf)); 84 85 /* Encrypt it (from/to ASCII); if it worked, convert back. */ 86 ret = DES_fcrypt(e_buf, e_salt, buff); 87 if (ret != NULL) 88 ascii2ebcdic(ret, ret, strlen(ret)); 89 90 return ret; 91 #endif 92 } 93 94 char *DES_fcrypt(const char *buf, const char *salt, char *ret) 95 { 96 unsigned int i, j, x, y; 97 DES_LONG Eswap0, Eswap1; 98 DES_LONG out[2], ll; 99 DES_cblock key; 100 DES_key_schedule ks; 101 unsigned char bb[9]; 102 unsigned char *b = bb; 103 unsigned char c, u; 104 105 x = ret[0] = salt[0]; 106 if (x == 0 || x >= sizeof(con_salt)) 107 return NULL; 108 Eswap0 = con_salt[x] << 2; 109 x = ret[1] = salt[1]; 110 if (x == 0 || x >= sizeof(con_salt)) 111 return NULL; 112 Eswap1 = con_salt[x] << 6; 113 114 /* 115 * EAY r=strlen(buf); r=(r+7)/8; 116 */ 117 for (i = 0; i < 8; i++) { 118 c = *(buf++); 119 if (!c) 120 break; 121 key[i] = (c << 1); 122 } 123 for (; i < 8; i++) 124 key[i] = 0; 125 126 DES_set_key_unchecked(&key, &ks); 127 fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1); 128 129 ll = out[0]; 130 l2c(ll, b); 131 ll = out[1]; 132 l2c(ll, b); 133 y = 0; 134 u = 0x80; 135 bb[8] = 0; 136 for (i = 2; i < 13; i++) { 137 c = 0; 138 for (j = 0; j < 6; j++) { 139 c <<= 1; 140 if (bb[y] & u) 141 c |= 1; 142 u >>= 1; 143 if (!u) { 144 y++; 145 u = 0x80; 146 } 147 } 148 ret[i] = cov_2char[c]; 149 } 150 ret[13] = '\0'; 151 return ret; 152 } 153