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

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// Copyright 2015 Joyent, Inc.

module.exports = {
	read: read,
	write: write
};

var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
var rfc4253 = require('./rfc4253');
var utils = require('../utils');
var Key = require('../key');
var PrivateKey = require('../private-key');

var sshpriv = require('./ssh-private');

/*JSSTYLED*/
var SSHKEY_RE = /^([a-z0-9-]+)[ \t]+([a-zA-Z0-9+\/]+[=]*)([ \t]+([^ \t][^\n]*[\n]*)?)?$/;
/*JSSTYLED*/
var SSHKEY_RE2 = /^([a-z0-9-]+)[ \t\n]+([a-zA-Z0-9+\/][a-zA-Z0-9+\/ \t\n=]*)([^a-zA-Z0-9+\/ \t\n=].*)?$/;

function read(buf, options) {
	if (typeof (buf) !== 'string') {
		assert.buffer(buf, 'buf');
		buf = buf.toString('ascii');
	}

	var trimmed = buf.trim().replace(/[\\\r]/g, '');
	var m = trimmed.match(SSHKEY_RE);
	if (!m)
		m = trimmed.match(SSHKEY_RE2);
	assert.ok(m, 'key must match regex');

	var type = rfc4253.algToKeyType(m[1]);
	var kbuf = Buffer.from(m[2], 'base64');

	/*
	 * This is a bit tricky. If we managed to parse the key and locate the
	 * key comment with the regex, then do a non-partial read and assert
	 * that we have consumed all bytes. If we couldn't locate the key
	 * comment, though, there may be whitespace shenanigans going on that
	 * have conjoined the comment to the rest of the key. We do a partial
	 * read in this case to try to make the best out of a sorry situation.
	 */
	var key;
	var ret = {};
	if (m[4]) {
		try {
			key = rfc4253.read(kbuf);

		} catch (e) {
			m = trimmed.match(SSHKEY_RE2);
			assert.ok(m, 'key must match regex');
			kbuf = Buffer.from(m[2], 'base64');
			key = rfc4253.readInternal(ret, 'public', kbuf);
		}
	} else {
		key = rfc4253.readInternal(ret, 'public', kbuf);
	}