blob: 4b023b91a93f8e1c6bd7c232f89553a208cc4a68 (
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
|
#ifndef GSIMM_H
#define GSIMM_H
/* Length of file message digest (MD) in bytes. Longer MD's are
better, but increase processing time for diminishing returns.
Must be multiple of NUM_HASHES_PER_CHAR / 8, and at least 24
for good results
*/
#define MD_LENGTH 32
#define MD_BITS (MD_LENGTH * 8)
/* The MIN_FILE_SIZE indicates the absolute minimal file size that
can be processed. As indicated above, the first and last
RABIN_WINDOW_SIZE - 1 bytes are skipped.
In order to get at least an average of 12 samples
per bit in the final message digest, require at least 3 * MD_LENGTH
complete windows in the file. */
#define MIN_FILE_SIZE (3 * MD_LENGTH + 2 * (RABIN_WINDOW_SIZE - 1))
/* Limit matching algorithm to files less than 256 MB, so we can use
32 bit integers everywhere without fear of overflow. For larger
files we should add logic to mmap the file by piece and accumulate
the frequency counts. */
#define MAX_FILE_SIZE (256*1024*1024 - 1)
void gb_simm_process(u_char *data, unsigned len, u_char *md);
#endif
|
