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/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Hex encryption/decryption and utility routines
*
* Copyright (C) 1986, Sun Microsystems, Inc.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rpc/des_crypt.h>
static char hex[]; /* forward */
static char hexval __P(( char ));
static void bin2hex __P(( int, unsigned char *, char * ));
static void hex2bin __P(( int, char *, char * ));
void passwd2des __P(( char *, char * ));
/*
* Encrypt a secret key given passwd
* The secret key is passed and returned in hex notation.
* Its length must be a multiple of 16 hex digits (64 bits).
*/
int
xencrypt(secret, passwd)
char *secret;
char *passwd;
{
char key[8];
char ivec[8];
char *buf;
int err;
int len;
len = strlen(secret) / 2;
buf = malloc((unsigned)len);
hex2bin(len, secret, buf);
passwd2des(passwd, key);
bzero(ivec, 8);
err = cbc_crypt(key, buf, len, DES_ENCRYPT | DES_HW, ivec);
if (DES_FAILED(err)) {
free(buf);
return (0);
}
bin2hex(len, (unsigned char *) buf, secret);
free(buf);
return (1);
}
/*
* Decrypt secret key using passwd
* The secret key is passed and returned in hex notation.
* Once again, the length is a multiple of 16 hex digits
*/
int
xdecrypt(secret, passwd)
char *secret;
char *passwd;
{
char key[8];
char ivec[8];
char *buf;
int err;
int len;
len = strlen(secret) / 2;
buf = malloc((unsigned)len);
hex2bin(len, secret, buf);
passwd2des(passwd, key);
bzero(ivec, 8);
err = cbc_crypt(key, buf, len, DES_DECRYPT | DES_HW, ivec);
if (DES_FAILED(err)) {
free(buf);
return (0);
}
bin2hex(len, (unsigned char *) buf, secret);
free(buf);
return (1);
}
/*
* Turn password into DES key
*/
void
passwd2des(pw, key)
char *pw;
char *key;
{
int i;
bzero(key, 8);
for (i = 0; *pw; i = (i+1)%8) {
key[i] ^= *pw++ << 1;
}
des_setparity(key);
}
/*
* Hex to binary conversion
*/
static void
hex2bin(len, hexnum, binnum)
int len;
char *hexnum;
char *binnum;
{
int i;
for (i = 0; i < len; i++) {
*binnum++ = 16 * hexval(hexnum[2*i]) + hexval(hexnum[2*i+1]);
}
}
/*
* Binary to hex conversion
*/
static void
bin2hex(len, binnum, hexnum)
int len;
unsigned char *binnum;
char *hexnum;
{
int i;
unsigned val;
for (i = 0; i < len; i++) {
val = binnum[i];
hexnum[i*2] = hex[val >> 4];
hexnum[i*2+1] = hex[val & 0xf];
}
hexnum[len*2] = 0;
}
static char hex[16] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
};
static char
hexval(c)
char c;
{
if (c >= '0' && c <= '9') {
return (c - '0');
} else if (c >= 'a' && c <= 'z') {
return (c - 'a' + 10);
} else if (c >= 'A' && c <= 'Z') {
return (c - 'A' + 10);
} else {
return (-1);
}
}
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