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- #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 = "#d/0";
- 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);
- }
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