.
[glibc/history.git] / sunrpc / des_crypt.c
blob87389b47ce73087b908153c2bdd417dbc9fd3483
1 /*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California 94043
29 #if !defined(lint) && defined(SCCSID)
30 static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
31 #endif
33 * des_crypt.c, DES encryption library routines
34 * Copyright (C) 1986, Sun Microsystems, Inc.
37 #include <sys/types.h>
38 #include <rpc/des_crypt.h>
39 #include "des.h"
41 extern int _des_crypt (char *, unsigned, struct desparams *);
44 * Copy 8 bytes
46 #define COPY8(src, dst) { \
47 register char *a = (char *) dst; \
48 register char *b = (char *) src; \
49 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
50 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
54 * Copy multiple of 8 bytes
56 #define DESCOPY(src, dst, len) { \
57 register char *a = (char *) dst; \
58 register char *b = (char *) src; \
59 register int i; \
60 for (i = (int) len; i > 0; i -= 8) { \
61 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
62 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
63 } \
67 * Common code to cbc_crypt() & ecb_crypt()
69 static int
70 common_crypt (char *key, char *buf, register unsigned len,
71 unsigned mode, register struct desparams *desp)
73 register int desdev;
75 if ((len % 8) != 0 || len > DES_MAXDATA)
76 return DESERR_BADPARAM;
78 desp->des_dir =
79 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
81 desdev = mode & DES_DEVMASK;
82 COPY8 (key, desp->des_key);
83 /*
84 * software
86 if (!_des_crypt (buf, len, desp))
87 return DESERR_HWERROR;
89 return desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE;
93 * CBC mode encryption
95 int
96 cbc_crypt (char *key, char *buf, unsigned int len, unsigned int mode,
97 char *ivec)
99 int err;
100 struct desparams dp;
102 dp.des_mode = CBC;
103 COPY8 (ivec, dp.des_ivec);
104 err = common_crypt (key, buf, len, mode, &dp);
105 COPY8 (dp.des_ivec, ivec);
106 return err;
108 libc_hidden_def (cbc_crypt)
111 * ECB mode encryption
114 ecb_crypt (char *key, char *buf, unsigned int len, unsigned int mode)
116 struct desparams dp;
118 dp.des_mode = ECB;
119 return common_crypt (key, buf, len, mode, &dp);
121 libc_hidden_def (ecb_crypt)