1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*
* $Source$
* $Author$
*
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*/
#ifndef lint
static char rcsid_enc_c[] =
"$Id$";
#endif
#include <mit-copyright.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/file.h>
#include <fcntl.h>
#include <des.h>
des_key_schedule KEYSCHED;
des_cblock key = {0,1,2,3,4,5,6,7};
des_cblock sum;
char inbuf[512+8]; /* leave room for cksum and len */
char oubuf[512+8];
int ind;
int oud;
long orig_size;
main(argc,argv)
int argc;
char *argv[];
{
register int encrypt;
register long length;
register int *p;
u_int32 ivec[2];
if (argc != 4) {
fprintf (stderr, "%s: Usage: %s infile outfile mode.\n",
argv[0], argv[0]);
exit (1);
}
if (!strcmp(argv[3], "e"))
encrypt = 1;
else if (!strcmp(argv[3], "d"))
encrypt = 0;
else {
fprintf (stderr, "%s: Mode must be e (encrypt) or d (decrypt).\n",
argv[0]);
exit (1);
}
if ((ind = open(argv[1], O_RDONLY, 0666)) < 0) {
fprintf (stderr, "%s: Cannot open %s for input.\n",
argv[0], argv[1]);
exit (1);
}
if (!strcmp(argv[2], "-"))
oud = dup(1);
else if ((oud = open(argv[2], O_CREAT|O_WRONLY, 0666)) < 0) {
fprintf (stderr, "%s: Cannot open %s for output.\n",
argv[0], argv[2]);
exit (1);
}
#ifdef notdef
(void) freopen ("/dev/tty", "r", stdin);
(void) freopen ("/dev/tty", "w", stdout);
#endif
des_read_password (key, "\n\07\07Enter Key> ", 1);
if (des_key_sched (key, KEYSCHED) < 0) {
fprintf (stderr, "%s: Key parity error\n", argv[0]);
exit (1);
}
ivec[0] = 0;
ivec[1] = 0;
memcpy(sum, key, sizeof(des_cblock));
for (;;) {
if ((length = read (ind, inbuf, 512)) < 0) {
fprintf (stderr, "%s: Error reading from input.\n",
argv[0]);
exit (1);
} else if (length == 0) {
fprintf (stderr, "\n");
break;
}
if (encrypt) {
#ifdef notdef
sum = des_quad_cksum(inbuf,NULL,length,1,sum);
#endif
des_quad_cksum(inbuf,sum,length,1,sum);
orig_size += length;
fprintf(stderr,
"\nlength = %d tot length = %d quad_sum = %X %X",
length, orig_size, *(unsigned long *) sum,
*((unsigned long *) sum+1));
fflush(stderr);
}
des_pcbc_encrypt (inbuf, oubuf, (long) length, KEYSCHED, ivec,
encrypt);
if (!encrypt) {
#ifdef notdef
sum = des_quad_cksum(oubuf,NULL,length,1,sum);
#endif
des_quad_cksum(oubuf,sum,length,1,sum);
orig_size += length;
fprintf(stderr,
"\nlength = %d tot length = %d quad_sum = %X ",
length, orig_size, *(unsigned long *) sum,
*((unsigned long *) sum+1));
}
length = (length+7)& ~07;
write (oud, oubuf, length);
if (!encrypt)
p = (int *)&oubuf[length-8];
else
p = (int *)&inbuf[length-8];
ivec[0] = *p++;
ivec[1] = *p;
}
fprintf(stderr,"\ntot length = %d quad_sum = %X\n",
orig_size,sum);
/* if encrypting, now put the original length and checksum in */
return 0;
}
|
