2 * des_crypt.c, DES encryption library routines
3 * Copyright (C) 1986, Sun Microsystems, Inc.
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33 #include <sys/types.h>
34 #include <rpc/des_crypt.h>
37 extern int _des_crypt (char *, unsigned, struct desparams *);
42 #define COPY8(src, dst) { \
43 register char *a = (char *) dst; \
44 register char *b = (char *) src; \
45 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
46 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
50 * Copy multiple of 8 bytes
52 #define DESCOPY(src, dst, len) { \
53 register char *a = (char *) dst; \
54 register char *b = (char *) src; \
56 for (i = (int) len; i > 0; i -= 8) { \
57 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
58 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
63 * Common code to cbc_crypt() & ecb_crypt()
66 common_crypt (char *key, char *buf, register unsigned len,
67 unsigned mode, register struct desparams *desp)
71 if ((len % 8) != 0 || len > DES_MAXDATA)
72 return DESERR_BADPARAM;
75 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
77 desdev = mode & DES_DEVMASK;
78 COPY8 (key, desp->des_key);
82 if (!_des_crypt (buf, len, desp))
83 return DESERR_HWERROR;
85 return desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE;
92 cbc_crypt (char *key, char *buf, unsigned int len, unsigned int mode,
99 COPY8 (ivec, dp.des_ivec);
100 err = common_crypt (key, buf, len, mode, &dp);
101 COPY8 (dp.des_ivec, ivec);
104 libc_hidden_def (cbc_crypt)
107 * ECB mode encryption
110 ecb_crypt (char *key, char *buf, unsigned int len, unsigned int mode)
115 return common_crypt (key, buf, len, mode, &dp);
117 libc_hidden_def (ecb_crypt)