154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*-
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* des_crypt.c, DES encryption library routines
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* Copyright (C) 1986, Sun Microsystems, Inc.
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*/
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#include <sys/types.h>
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#include <rpc/des_crypt.h>
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#include <rpc/des.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * );
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int (*__des_crypt_LOCAL)() = 0;
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extern int _des_crypt_call(char *, int, struct desparams *);
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/*
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* Copy 8 bytes
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*/
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#define COPY8(src, dst) { \
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char *a = (char *) dst; \
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char *b = (char *) src; \
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*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
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*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
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}
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/*
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* Copy multiple of 8 bytes
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*/
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#define DESCOPY(src, dst, len) { \
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char *a = (char *) dst; \
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char *b = (char *) src; \
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int i; \
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for (i = (int) len; i > 0; i -= 8) { \
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*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
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*a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
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} \
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}
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/*
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* CBC mode encryption
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*/
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int
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cbc_crypt(key, buf, len, mode, ivec)
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char *key;
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char *buf;
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unsigned len;
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unsigned mode;
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char *ivec;
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{
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int err;
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struct desparams dp;
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#ifdef BROKEN_DES
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dp.UDES.UDES_buf = buf;
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dp.des_mode = ECB;
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#else
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dp.des_mode = CBC;
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#endif
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COPY8(ivec, dp.des_ivec);
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err = common_crypt(key, buf, len, mode, &dp);
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COPY8(dp.des_ivec, ivec);
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return(err);
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}
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/*
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* ECB mode encryption
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*/
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int
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ecb_crypt(key, buf, len, mode)
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char *key;
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char *buf;
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unsigned len;
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unsigned mode;
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{
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struct desparams dp;
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#ifdef BROKEN_DES
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dp.UDES.UDES_buf = buf;
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dp.des_mode = CBC;
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#else
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dp.des_mode = ECB;
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#endif
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return(common_crypt(key, buf, len, mode, &dp));
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}
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/*
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* Common code to cbc_crypt() & ecb_crypt()
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*/
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static int
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common_crypt(key, buf, len, mode, desp)
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char *key;
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char *buf;
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unsigned len;
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unsigned mode;
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struct desparams *desp;
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{
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int desdev;
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if ((len % 8) != 0 || len > DES_MAXDATA) {
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return(DESERR_BADPARAM);
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}
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desp->des_dir =
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((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
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desdev = mode & DES_DEVMASK;
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COPY8(key, desp->des_key);
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/*
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* software
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*/
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if (__des_crypt_LOCAL != NULL) {
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if (!__des_crypt_LOCAL(buf, len, desp)) {
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return (DESERR_HWERROR);
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}
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} else {
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if (!_des_crypt_call(buf, len, desp)) {
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return (DESERR_HWERROR);
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}
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}
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return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
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}
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