1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 /* 30 * Hex encryption/decryption and utility routines 31 * 32 * Copyright (C) 1986, Sun Microsystems, Inc. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <rpc/des_crypt.h> 42 43 static char hex[]; /* forward */ 44 static char hexval( char ); 45 static void bin2hex( int, unsigned char *, char * ); 46 static void hex2bin( int, char *, char * ); 47 void passwd2des( char *, char * ); 48 49 /* 50 * Encrypt a secret key given passwd 51 * The secret key is passed and returned in hex notation. 52 * Its length must be a multiple of 16 hex digits (64 bits). 53 */ 54 int 55 xencrypt(secret, passwd) 56 char *secret; 57 char *passwd; 58 { 59 char key[8]; 60 char ivec[8]; 61 char *buf; 62 int err; 63 int len; 64 65 len = strlen(secret) / 2; 66 buf = malloc((unsigned)len); 67 68 hex2bin(len, secret, buf); 69 passwd2des(passwd, key); 70 bzero(ivec, 8); 71 72 err = cbc_crypt(key, buf, len, DES_ENCRYPT | DES_HW, ivec); 73 if (DES_FAILED(err)) { 74 free(buf); 75 return (0); 76 } 77 bin2hex(len, (unsigned char *) buf, secret); 78 free(buf); 79 return (1); 80 } 81 82 /* 83 * Decrypt secret key using passwd 84 * The secret key is passed and returned in hex notation. 85 * Once again, the length is a multiple of 16 hex digits 86 */ 87 int 88 xdecrypt(secret, passwd) 89 char *secret; 90 char *passwd; 91 { 92 char key[8]; 93 char ivec[8]; 94 char *buf; 95 int err; 96 int len; 97 98 len = strlen(secret) / 2; 99 buf = malloc((unsigned)len); 100 101 hex2bin(len, secret, buf); 102 passwd2des(passwd, key); 103 bzero(ivec, 8); 104 105 err = cbc_crypt(key, buf, len, DES_DECRYPT | DES_HW, ivec); 106 if (DES_FAILED(err)) { 107 free(buf); 108 return (0); 109 } 110 bin2hex(len, (unsigned char *) buf, secret); 111 free(buf); 112 return (1); 113 } 114 115 116 /* 117 * Turn password into DES key 118 */ 119 void 120 passwd2des(pw, key) 121 char *pw; 122 char *key; 123 { 124 int i; 125 126 bzero(key, 8); 127 for (i = 0; *pw; i = (i+1)%8) { 128 key[i] ^= *pw++ << 1; 129 } 130 des_setparity(key); 131 } 132 133 134 135 /* 136 * Hex to binary conversion 137 */ 138 static void 139 hex2bin(len, hexnum, binnum) 140 int len; 141 char *hexnum; 142 char *binnum; 143 { 144 int i; 145 146 for (i = 0; i < len; i++) { 147 *binnum++ = 16 * hexval(hexnum[2*i]) + hexval(hexnum[2*i+1]); 148 } 149 } 150 151 /* 152 * Binary to hex conversion 153 */ 154 static void 155 bin2hex(len, binnum, hexnum) 156 int len; 157 unsigned char *binnum; 158 char *hexnum; 159 { 160 int i; 161 unsigned val; 162 163 for (i = 0; i < len; i++) { 164 val = binnum[i]; 165 hexnum[i*2] = hex[val >> 4]; 166 hexnum[i*2+1] = hex[val & 0xf]; 167 } 168 hexnum[len*2] = 0; 169 } 170 171 static char hex[16] = { 172 '0', '1', '2', '3', '4', '5', '6', '7', 173 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 174 }; 175 176 static char 177 hexval(c) 178 char c; 179 { 180 if (c >= '0' && c <= '9') { 181 return (c - '0'); 182 } else if (c >= 'a' && c <= 'z') { 183 return (c - 'a' + 10); 184 } else if (c >= 'A' && c <= 'Z') { 185 return (c - 'A' + 10); 186 } else { 187 return (-1); 188 } 189 } 190