1 files changed, 73 insertions, 0 deletions
diff --git a/node_modules/sshpk/lib/formats/auto.js b/node_modules/sshpk/lib/formats/auto.js
new file mode 100644
index 0000000..973c032
--- /dev/null
+++ b/node_modules/sshpk/lib/formats/auto.js
@@ -0,0 +1,73 @@
+// Copyright 2015 Joyent, Inc.
+
+module.exports = {
+	read: read,
+	write: write
+};
+
+var assert = require('assert-plus');
+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');
+
+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));
+		buf = new Buffer(buf, 'binary');
+	} else {
+		assert.buffer(buf);
+		if (findPEMHeader(buf))
+			return (pem.read(buf, options));
+		if (findSSHHeader(buf))
+			return (ssh.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 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 write(key, options) {
+	throw (new Error('"auto" format cannot be used for writing'));
+}