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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/libc/rpc/des_crypt.c,v 1.5 2005/11/13 12:27:04 swildner 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 ( char *, char *, unsigned, unsigned, struct desparams * );
43 int (*__des_crypt_LOCAL)() = 0;
44 extern _des_crypt_call ( char *, int, struct desparams * );
48 #define COPY8(src, dst) { \
49 char *a = (char *) dst; \
50 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 char *a = (char *) dst; \
60 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(char *key, char *buf, unsigned len, unsigned mode, char *ivec)
78 dp.UDES.UDES_buf = buf;
83 COPY8(ivec, dp.des_ivec);
84 err = common_crypt(key, buf, len, mode, &dp);
85 COPY8(dp.des_ivec, ivec);
94 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode)
99 dp.UDES.UDES_buf = buf;
104 return(common_crypt(key, buf, len, mode, &dp));
110 * Common code to cbc_crypt() & ecb_crypt()
113 common_crypt(char *key, char *buf, unsigned len, unsigned mode,
114 struct desparams *desp)
118 if ((len % 8) != 0 || len > DES_MAXDATA) {
119 return(DESERR_BADPARAM);
122 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
124 desdev = mode & DES_DEVMASK;
125 COPY8(key, desp->des_key);
129 if (__des_crypt_LOCAL != NULL) {
130 if (!__des_crypt_LOCAL(buf, len, desp)) {
131 return (DESERR_HWERROR);
134 if (!_des_crypt_call(buf, len, desp)) {
135 return (DESERR_HWERROR);
138 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);