cloudfunctions/ClearingRedundantFolders/node_modules/sshpk/lib/formats/auto.js

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

// 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);