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.
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.
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.
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.
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.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
29 * @(#)xcrypt.c 2.2 88/08/10 4.0 RPCSRC
30 * $FreeBSD: src/lib/librpcsvc/xcrypt.c,v 1.2 1999/08/28 00:05:24 peter Exp $
31 * $DragonFly: src/lib/librpcsvc/xcrypt.c,v 1.4 2007/11/25 14:33:02 swildner Exp $
34 * Hex encryption/decryption and utility routines
36 * Copyright (C) 1986, Sun Microsystems, Inc.
42 #include <sys/cdefs.h>
43 #include <rpc/des_crypt.h>
45 static char hex[]; /* forward */
46 static char hexval ( char );
47 static void bin2hex ( int, unsigned char *, char * );
48 static void hex2bin ( int, char *, char * );
49 void passwd2des ( char *, char * );
52 * Encrypt a secret key given passwd
53 * The secret key is passed and returned in hex notation.
54 * Its length must be a multiple of 16 hex digits (64 bits).
57 xencrypt(char *secret, char *passwd)
65 len = strlen(secret) / 2;
66 buf = malloc((unsigned)len);
68 hex2bin(len, secret, buf);
69 passwd2des(passwd, key);
72 err = cbc_crypt(key, buf, len, DES_ENCRYPT | DES_HW, ivec);
73 if (DES_FAILED(err)) {
77 bin2hex(len, (unsigned char *) buf, secret);
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
88 xdecrypt(char *secret, char *passwd)
96 len = strlen(secret) / 2;
97 buf = malloc((unsigned)len);
99 hex2bin(len, secret, buf);
100 passwd2des(passwd, key);
103 err = cbc_crypt(key, buf, len, DES_DECRYPT | DES_HW, ivec);
104 if (DES_FAILED(err)) {
108 bin2hex(len, (unsigned char *) buf, secret);
115 * Turn password into DES key
118 passwd2des(char *pw, char *key)
123 for (i = 0; *pw; i = (i+1)%8) {
124 key[i] ^= *pw++ << 1;
132 * Hex to binary conversion
135 hex2bin(int len, char *hexnum, char *binnum)
139 for (i = 0; i < len; i++) {
140 *binnum++ = 16 * hexval(hexnum[2*i]) + hexval(hexnum[2*i+1]);
145 * Binary to hex conversion
148 bin2hex(int len, unsigned char *binnum, char *hexnum)
153 for (i = 0; i < len; i++) {
155 hexnum[i*2] = hex[val >> 4];
156 hexnum[i*2+1] = hex[val & 0xf];
161 static char hex[16] = {
162 '0', '1', '2', '3', '4', '5', '6', '7',
163 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
169 if (c >= '0' && c <= '9') {
171 } else if (c >= 'a' && c <= 'z') {
172 return (c - 'a' + 10);
173 } else if (c >= 'A' && c <= 'Z') {
174 return (c - 'A' + 10);