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
|
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mp.h>
#include <libsec.h>
void
usage(void)
{
fprint(2, "auth/pemdecode section [file]\n");
exits("usage");
}
void
main(int argc, char **argv)
{
char *buf;
uchar *bin;
int fd;
long n, tot;
int len;
char *tag, *file;
ARGBEGIN{
default:
usage();
}ARGEND
if(argc != 1 && argc != 2)
usage();
tag = argv[0];
if(argc == 2)
file = argv[1];
else
file = "/dev/stdin";
if((fd = open(file, OREAD)) < 0)
sysfatal("open %s: %r", file);
buf = nil;
tot = 0;
for(;;){
buf = realloc(buf, tot+8192);
if(buf == nil)
sysfatal("realloc: %r");
if((n = read(fd, buf+tot, 8192)) < 0)
sysfatal("read: %r");
if(n == 0)
break;
tot += n;
}
buf[tot] = 0;
bin = decodepem(buf, tag, &len, nil);
if(bin == nil)
sysfatal("cannot extract section '%s' from pem", tag);
if((n=write(1, bin, len)) != len)
sysfatal("writing %d bytes got %ld: %r", len, n);
exits(0);
}
|