home *** CD-ROM | disk | FTP | other *** search
- #ifndef lint
- static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
- #endif
- /*
- * 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 <des_crypt.h>
-
- #include "des.h"
-
- static int common_crypt();
-
- #if 0
- /*
- * To see if chip is installed
- */
- #define UNOPENED (-2)
- static int g_desfd = UNOPENED;
- #endif
-
- /*
- * 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;
-
- dp.des_mode = CBC;
- 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;
-
- dp.des_mode = ECB;
- 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;
- unsigned len;
- unsigned mode;
- 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);
- }
-