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27 * Mountain View, California 94043
29 * @(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI
30 * $FreeBSD: src/lib/libc/rpc/des_crypt.c,v 1.3 1999/08/28 00:00:38 peter Exp $
31 * $DragonFly: src/lib/libcr/rpc/Attic/des_crypt.c,v 1.2 2003/06/17 04:26:44 dillon Exp $
34 * des_crypt.c, DES encryption library routines
35 * Copyright (C) 1986, Sun Microsystems, Inc.
38 #include <sys/types.h>
39 #include <rpc/des_crypt.h>
42 static int common_crypt __P(( char *, char *, register unsigned, unsigned, struct desparams * ));
43 int (*__des_crypt_LOCAL)() = 0;
44 extern _des_crypt_call __P(( char *, int, struct desparams * ));
48 #define COPY8(src, dst) { \
49 register char *a = (char *) dst; \
50 register char *b = (char *) src; \
51 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
52 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
56 * Copy multiple of 8 bytes
58 #define DESCOPY(src, dst, len) { \
59 register char *a = (char *) dst; \
60 register char *b = (char *) src; \
62 for (i = (int) len; i > 0; i -= 8) { \
63 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
64 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
72 cbc_crypt(key, buf, len, mode, ivec)
83 dp.UDES.UDES_buf = buf;
88 COPY8(ivec, dp.des_ivec);
89 err = common_crypt(key, buf, len, mode, &dp);
90 COPY8(dp.des_ivec, ivec);
99 ecb_crypt(key, buf, len, mode)
108 dp.UDES.UDES_buf = buf;
113 return(common_crypt(key, buf, len, mode, &dp));
119 * Common code to cbc_crypt() & ecb_crypt()
122 common_crypt(key, buf, len, mode, desp)
125 register unsigned len;
127 register struct desparams *desp;
131 if ((len % 8) != 0 || len > DES_MAXDATA) {
132 return(DESERR_BADPARAM);
135 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
137 desdev = mode & DES_DEVMASK;
138 COPY8(key, desp->des_key);
142 if (__des_crypt_LOCAL != NULL) {
143 if (!__des_crypt_LOCAL(buf, len, desp)) {
144 return (DESERR_HWERROR);
147 if (!_des_crypt_call(buf, len, desp)) {
148 return (DESERR_HWERROR);
151 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);