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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
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
#ident "@(#)xcrypt.c 1.11 94/08/23 SMI"
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)xcrypt.c 1.3 89/03/24 Copyr 1986 Sun Micro";
#endif
/*
* xcrypt.c: Hex encryption/decryption and utility routines
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <rpc/des_crypt.h>
static char hex[16] =
{
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
};
static char hexval (char);
static void hex2bin (int, char *, char *);
static void bin2hex (int, unsigned char *, char *);
void passwd2des (char *pw, char *key);
/*
* 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 (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);
memset (ivec, 0, 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 (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);
memset (ivec, 0, 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 (char *pw, char *key)
{
int i;
memset (key, 0, 8);
for (i = 0; *pw; i = (i + 1) % 8)
key[i] ^= *pw++ << 1;
des_setparity (key);
}
/*
* Hex to binary conversion
*/
static void
hex2bin (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 (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
hexval (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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