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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
*/
/*
* des_crypt.c, DES encryption library routines
* Copyright (C) 1986, Sun Microsystems, Inc.
*/
#include <sys/types.h>
#include <rpc/des_crypt.h>
#include <rpc/des.h>
#ifndef lint
/* from: static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI"; */
static const char rcsid[] = "$FreeBSD$";
#endif
static int common_crypt __P(( char *, char *, register unsigned, unsigned, struct desparams * ));
int (*__des_crypt_LOCAL)() = 0;
extern _des_crypt_call __P(( char *, int, struct desparams * ));
/*
* Copy 8 bytes
*/
#define COPY8(src, dst) { \
register char *a = (char *) dst; \
register char *b = (char *) src; \
*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
}
/*
* Copy multiple of 8 bytes
*/
#define DESCOPY(src, dst, len) { \
register char *a = (char *) dst; \
register char *b = (char *) src; \
register int i; \
for (i = (int) len; i > 0; i -= 8) { \
*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
} \
}
/*
* CBC mode encryption
*/
int
cbc_crypt(key, buf, len, mode, ivec)
char *key;
char *buf;
unsigned len;
unsigned mode;
char *ivec;
{
int err;
struct desparams dp;
#ifdef BROKEN_DES
dp.UDES.UDES_buf = buf;
dp.des_mode = ECB;
#else
dp.des_mode = CBC;
#endif
COPY8(ivec, dp.des_ivec);
err = common_crypt(key, buf, len, mode, &dp);
COPY8(dp.des_ivec, ivec);
return(err);
}
/*
* ECB mode encryption
*/
int
ecb_crypt(key, buf, len, mode)
char *key;
char *buf;
unsigned len;
unsigned mode;
{
struct desparams dp;
#ifdef BROKEN_DES
dp.UDES.UDES_buf = buf;
dp.des_mode = CBC;
#else
dp.des_mode = ECB;
#endif
return(common_crypt(key, buf, len, mode, &dp));
}
/*
* Common code to cbc_crypt() & ecb_crypt()
*/
static int
common_crypt(key, buf, len, mode, desp)
char *key;
char *buf;
register unsigned len;
unsigned mode;
register struct desparams *desp;
{
register int desdev;
if ((len % 8) != 0 || len > DES_MAXDATA) {
return(DESERR_BADPARAM);
}
desp->des_dir =
((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
desdev = mode & DES_DEVMASK;
COPY8(key, desp->des_key);
/*
* software
*/
if (__des_crypt_LOCAL != NULL) {
if (!__des_crypt_LOCAL(buf, len, desp)) {
return (DESERR_HWERROR);
}
} else {
if (!_des_crypt_call(buf, len, desp)) {
return (DESERR_HWERROR);
}
}
return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
}
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