154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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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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#ifndef lint
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/* from: 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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static const char rcsid[] = "$Id$";
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#endif
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static int common_crypt __P(( char *, char *, register unsigned, unsigned, struct desparams * ));
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int (*__des_crypt_LOCAL)() = 0;
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extern _des_crypt_call __P(( 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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register char *a = (char *) dst; \
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register 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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register char *a = (char *) dst; \
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register char *b = (char *) src; \
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register 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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register unsigned len;
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unsigned mode;
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register struct desparams *desp;
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{
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register 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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