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[16] = { 44 '0', '1', '2', '3', '4', '5', '6', '7', 45 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 46 }; 47 48 static char hexval( char ); 49 static void bin2hex( int, unsigned char *, char * ); 50 static void hex2bin( int, char *, char * ); 51 void passwd2des( char *, char * ); 52 53 /* 54 * Encrypt a secret key given passwd 55 * The secret key is passed and returned in hex notation. 56 * Its length must be a multiple of 16 hex digits (64 bits). 57 */ 58 int 59 xencrypt(secret, passwd) 60 char *secret; 61 char *passwd; 62 { 63 char key[8]; 64 char ivec[8]; 65 char *buf; 66 int err; 67 int len; 68 69 len = strlen(secret) / 2; 70 if ((buf = malloc((unsigned)len)) == NULL) { 71 return(0); 72 } 73 74 hex2bin(len, secret, buf); 75 passwd2des(passwd, key); 76 bzero(ivec, 8); 77 78 err = cbc_crypt(key, buf, len, DES_ENCRYPT | DES_HW, ivec); 79 if (DES_FAILED(err)) { 80 free(buf); 81 return (0); 82 } 83 bin2hex(len, (unsigned char *) buf, secret); 84 free(buf); 85 return (1); 86 } 87 88 /* 89 * Decrypt secret key using passwd 90 * The secret key is passed and returned in hex notation. 91 * Once again, the length is a multiple of 16 hex digits 92 */ 93 int 94 xdecrypt(secret, passwd) 95 char *secret; 96 char *passwd; 97 { 98 char key[8]; 99 char ivec[8]; 100 char *buf; 101 int err; 102 int len; 103 104 len = strlen(secret) / 2; 105 if ((buf = malloc((unsigned)len)) == NULL) { 106 return(0); 107 } 108 109 hex2bin(len, secret, buf); 110 passwd2des(passwd, key); 111 bzero(ivec, 8); 112 113 err = cbc_crypt(key, buf, len, DES_DECRYPT | DES_HW, ivec); 114 if (DES_FAILED(err)) { 115 free(buf); 116 return (0); 117 } 118 bin2hex(len, (unsigned char *) buf, secret); 119 free(buf); 120 return (1); 121 } 122 123 124 /* 125 * Turn password into DES key 126 */ 127 void 128 passwd2des(pw, key) 129 char *pw; 130 char *key; 131 { 132 int i; 133 134 bzero(key, 8); 135 for (i = 0; *pw; i = (i+1)%8) { 136 key[i] ^= *pw++ << 1; 137 } 138 des_setparity(key); 139 } 140 141 142 143 /* 144 * Hex to binary conversion 145 */ 146 static void 147 hex2bin(len, hexnum, binnum) 148 int len; 149 char *hexnum; 150 char *binnum; 151 { 152 int i; 153 154 for (i = 0; i < len; i++) { 155 *binnum++ = 16 * hexval(hexnum[2*i]) + hexval(hexnum[2*i+1]); 156 } 157 } 158 159 /* 160 * Binary to hex conversion 161 */ 162 static void 163 bin2hex(len, binnum, hexnum) 164 int len; 165 unsigned char *binnum; 166 char *hexnum; 167 { 168 int i; 169 unsigned val; 170 171 for (i = 0; i < len; i++) { 172 val = binnum[i]; 173 hexnum[i*2] = hex[val >> 4]; 174 hexnum[i*2+1] = hex[val & 0xf]; 175 } 176 hexnum[len*2] = 0; 177 } 178 179 static char 180 hexval(c) 181 char c; 182 { 183 if (c >= '0' && c <= '9') { 184 return (c - '0'); 185 } else if (c >= 'a' && c <= 'z') { 186 return (c - 'a' + 10); 187 } else if (c >= 'A' && c <= 'Z') { 188 return (c - 'A' + 10); 189 } else { 190 return (-1); 191 } 192 } 193