Fix.

node_modules/sshpk/lib/formats/auto.js

@@ -0,0 +1,124 @@
+// Copyright 2018 Joyent, Inc.
+
+module.exports = {
+	read: read,
+	write: write
+};
+
+var assert = require('assert-plus');
+var Buffer = require('safer-buffer').Buffer;
+var utils = require('../utils');
+var Key = require('../key');
+var PrivateKey = require('../private-key');
+
+var pem = require('./pem');
+var ssh = require('./ssh');
+var rfc4253 = require('./rfc4253');
+var dnssec = require('./dnssec');
+var putty = require('./putty');
+
+var DNSSEC_PRIVKEY_HEADER_PREFIX = 'Private-key-format: v1';
+
+function read(buf, options) {
+	if (typeof (buf) === 'string') {
+		if (buf.trim().match(/^[-]+[ ]*BEGIN/))
+			return (pem.read(buf, options));
+		if (buf.match(/^\s*ssh-[a-z]/))
+			return (ssh.read(buf, options));
+		if (buf.match(/^\s*ecdsa-/))
+			return (ssh.read(buf, options));
+		if (buf.match(/^putty-user-key-file-2:/i))
+			return (putty.read(buf, options));
+		if (findDNSSECHeader(buf))
+			return (dnssec.read(buf, options));
+		buf = Buffer.from(buf, 'binary');
+	} else {
+		assert.buffer(buf);
+		if (findPEMHeader(buf))
+			return (pem.read(buf, options));
+		if (findSSHHeader(buf))
+			return (ssh.read(buf, options));
+		if (findPuTTYHeader(buf))
+			return (putty.read(buf, options));
+		if (findDNSSECHeader(buf))
+			return (dnssec.read(buf, options));
+	}
+	if (buf.readUInt32BE(0) < buf.length)
+		return (rfc4253.read(buf, options));
+	throw (new Error('Failed to auto-detect format of key'));
+}
+
+function findPuTTYHeader(buf) {
+	var offset = 0;
+	while (offset < buf.length &&
+	    (buf[offset] === 32 || buf[offset] === 10 || buf[offset] === 9))
+		++offset;
+	if (offset + 22 <= buf.length &&
+	    buf.slice(offset, offset + 22).toString('ascii').toLowerCase() ===
+	    'putty-user-key-file-2:')
+		return (true);
+	return (false);
+}
+
+function findSSHHeader(buf) {
+	var offset = 0;
+	while (offset < buf.length &&
+	    (buf[offset] === 32 || buf[offset] === 10 || buf[offset] === 9))
+		++offset;
+	if (offset + 4 <= buf.length &&
+	    buf.slice(offset, offset + 4).toString('ascii') === 'ssh-')
+		return (true);
+	if (offset + 6 <= buf.length &&
+	    buf.slice(offset, offset + 6).toString('ascii') === 'ecdsa-')
+		return (true);
+	return (false);
+}
+
+function findPEMHeader(buf) {
+	var offset = 0;
+	while (offset < buf.length &&
+	    (buf[offset] === 32 || buf[offset] === 10))
+		++offset;
+	if (buf[offset] !== 45)
+		return (false);
+	while (offset < buf.length &&
+	    (buf[offset] === 45))
+		++offset;
+	while (offset < buf.length &&
+	    (buf[offset] === 32))
+		++offset;
+	if (offset + 5 > buf.length ||
+	    buf.slice(offset, offset + 5).toString('ascii') !== 'BEGIN')
+		return (false);
+	return (true);
+}
+
+function findDNSSECHeader(buf) {
+	// private case first
+	if (buf.length <= DNSSEC_PRIVKEY_HEADER_PREFIX.length)
+		return (false);
+	var headerCheck = buf.slice(0, DNSSEC_PRIVKEY_HEADER_PREFIX.length);
+	if (headerCheck.toString('ascii') === DNSSEC_PRIVKEY_HEADER_PREFIX)
+		return (true);
+
+	// public-key RFC3110 ?
+	// 'domain.com. IN KEY ...' or 'domain.com. IN DNSKEY ...'
+	// skip any comment-lines
+	if (typeof (buf) !== 'string') {
+		buf = buf.toString('ascii');
+	}
+	var lines = buf.split('\n');
+	var line = 0;
+	/* JSSTYLED */
+	while (lines[line].match(/^\;/))
+		line++;
+	if (lines[line].toString('ascii').match(/\. IN KEY /))
+		return (true);
+	if (lines[line].toString('ascii').match(/\. IN DNSKEY /))
+		return (true);
+	return (false);
+}
+
+function write(key, options) {
+	throw (new Error('"auto" format cannot be used for writing'));
+}