#include <machine/rtems-bsd-user-space.h>
/*-
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* 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>
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * );
int (*__des_crypt_LOCAL)(char *, unsigned, struct desparams *) = 0;
extern int _des_crypt_call(char *, int, struct desparams *);
/*
* Copy 8 bytes
*/
#define COPY8(src, dst) { \
char *a = (char *) dst; \
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) { \
char *a = (char *) dst; \
char *b = (char *) src; \
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(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(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(char *key, char *buf, unsigned len, unsigned mode,
struct desparams *desp)
{
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);
}
