ref: 556618eb07d1ac6e2c629a60acd53c45d53261be
dir: /sys/src/cmd/auth/pemdecode.c/
#include <u.h> #include <libc.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 = "/fd/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); }