blob: 330fe2e5fac32fa49ce8d8686aa021b7d70a0d22 (
plain)
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
|
/* TODO: better randomness
*/
#include <sys/types.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include "shellcode.h"
unsigned long int
random_get (unsigned long int low, unsigned long int high)
{
unsigned long int val;
if (low > high) {
low ^= high;
high ^= low;
low ^= high;
}
val = (unsigned long int) random ();
val %= (high - low);
val += low;
return (val);
}
void
random_init (void)
{
srandom (time (NULL));
}
int
bad (unsigned char u)
{
if (u == '\x00' || u == '\x0a' || u == '\x0d' || u == '\x25')
return (1);
return (0);
}
int
badstr (unsigned char *code, int code_len, unsigned char *bad, int bad_len)
{
int n;
for (code_len -= 1 ; code_len >= 0 ; --code_len) {
for (n = 0 ; n < bad_len ; ++n)
if (code[code_len] == bad[n])
return (1);
}
return (0);
}
|
