forgot to commit asn1dump.c...

sys/src/cmd/auth/asn1dump.c

@@ -0,0 +1,58 @@
+#include <u.h>
+#include <libc.h>
+#include <mp.h>
+#include <libsec.h>
+
+void
+usage(void)
+{
+	fprint(2, "auth/asn1dump [file]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char *argv[])
+{
+	int fd, n, tot;
+	uchar *buf;
+	char *file;
+
+	fmtinstall('B', mpfmt);
+	fmtinstall('H', encodefmt);
+	fmtinstall('[', encodefmt);
+
+	ARGBEGIN{
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 0 && argc != 1)
+		usage();
+
+	if(argc == 1)
+		file = argv[0];
+	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;
+	}
+
+	asn1dump(buf, tot);
+
+	X509dump(buf, tot);
+
+	exits(nil);
+}