mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*
|
|
* des_crypt.c, DES encryption library routines
|
|
* Copyright (C) 1986, Sun Microsystems, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <rpc/des_crypt.h>
|
|
#include "des.h"
|
|
|
|
extern int _des_crypt (char *, unsigned, 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++; \
|
|
} \
|
|
}
|
|
|
|
/*
|
|
* Common code to cbc_crypt() & ecb_crypt()
|
|
*/
|
|
static int
|
|
common_crypt (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 (buf, len, desp))
|
|
return DESERR_HWERROR;
|
|
|
|
return desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE;
|
|
}
|
|
|
|
/*
|
|
* CBC mode encryption
|
|
*/
|
|
int
|
|
cbc_crypt (char *key, char *buf, unsigned int len, unsigned int mode,
|
|
char *ivec)
|
|
{
|
|
int err;
|
|
struct desparams dp;
|
|
|
|
dp.des_mode = CBC;
|
|
COPY8 (ivec, dp.des_ivec);
|
|
err = common_crypt (key, buf, len, mode, &dp);
|
|
COPY8 (dp.des_ivec, ivec);
|
|
return err;
|
|
}
|
|
libc_hidden_def (cbc_crypt)
|
|
|
|
/*
|
|
* ECB mode encryption
|
|
*/
|
|
int
|
|
ecb_crypt (char *key, char *buf, unsigned int len, unsigned int mode)
|
|
{
|
|
struct desparams dp;
|
|
|
|
dp.des_mode = ECB;
|
|
return common_crypt (key, buf, len, mode, &dp);
|
|
}
|
|
libc_hidden_def (ecb_crypt)
|