566 lines
16 KiB
PHP
566 lines
16 KiB
PHP
<?php
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// Copyright (c) 2015, Stanislav Humplik <sh@analogic.cz>
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the <organization> nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file is copied from https://github.com/analogic/lescript
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// and modified to work without files and integrate in Froxlor
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class lescript
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{
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// https://letsencrypt.org/repository/
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public $license;
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private $logger;
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private $client;
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private $accountKey;
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private $version;
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public function __construct($logger, $version = '1')
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{
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$this->logger = $logger;
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$this->version = $version;
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if (Settings::Get('system.letsencryptca') == 'production') {
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$ca = 'https://acme-v01.api.letsencrypt.org';
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} else {
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$ca = 'https://acme-staging.api.letsencrypt.org';
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}
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$this->client = new Client($ca);
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$this->log("Using '$ca' to generate certificate");
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}
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public function initAccount($certrow, $isFroxlorVhost = false)
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{
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// Let's see if we have the private accountkey
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$this->accountKey = $certrow['leprivatekey'];
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if (! $this->accountKey || $this->accountKey == 'unset' || Settings::Get('system.letsencryptca') != 'production') {
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// generate and save new private key for account
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// ---------------------------------------------
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$this->log('Starting new account registration');
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$keys = $this->generateKey();
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// Only store the accountkey in production, in staging always generate a new key
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if (Settings::Get('system.letsencryptca') == 'production') {
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if ($isFroxlorVhost) {
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Settings::Set('system.lepublickey', $keys['public']);
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Settings::Set('system.leprivatekey', $keys['private']);
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} else {
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$upd_stmt = Database::prepare("UPDATE `" . TABLE_PANEL_CUSTOMERS . "` SET `lepublickey` = :public, `leprivatekey` = :private " . "WHERE `customerid` = :customerid;");
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Database::pexecute($upd_stmt, array(
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'public' => $keys['public'],
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'private' => $keys['private'],
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'customerid' => $certrow['customerid']
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));
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}
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}
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$this->accountKey = $keys['private'];
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$response = $this->postNewReg();
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if ($this->client->getLastCode() != 201) {
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throw new \RuntimeException("Account not initialized, probably due to rate limiting. Whole response: " . json_encode($response));
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}
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$this->license = $this->client->getAgreementURL();
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// Terms of Servce are optional according to ACME specs; if no ToS are presented, no need to update registration
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if (!empty($this->license)) {
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$this->postRegAgreement(parse_url($this->client->getLastLocation(), PHP_URL_PATH));
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}
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$this->log('New account certificate registered');
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} else {
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$this->log('Account already registered. Continuing.');
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}
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}
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/**
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*
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* @param array $domains
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* @param string $domainkey
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* @param string $csr
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* optional, same behavior as $reuseCsr from the original class, but we're passing the content of the csr already
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*
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* @throws \RuntimeException
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* @return string[]
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*/
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public function signDomains(array $domains, $domainkey = null, $csr = null)
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{
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if (! $this->accountKey) {
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throw new \RuntimeException("Account not initialized");
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}
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$this->log('Starting certificate generation process for domains');
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$privateAccountKey = openssl_pkey_get_private($this->accountKey);
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$accountKeyDetails = openssl_pkey_get_details($privateAccountKey);
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// start domains authentication
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// ----------------------------
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foreach ($domains as $domain) {
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// 1. getting available authentication options
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// -------------------------------------------
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$this->log("Requesting challenge for $domain");
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$response = $this->signedRequest("/acme/new-authz", array(
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"resource" => "new-authz",
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"identifier" => array(
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"type" => "dns",
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"value" => $domain
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)
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));
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// if response is not an array but a string, it's most likely a server-error, e.g.
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// <HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY>An error occurred while processing your request.
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// <p>Reference #179.d8be1402.1458059103.3613c4db</BODY></HTML>
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if (! is_array($response)) {
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throw new RuntimeException("Invalid response from LE for domain $domain. Whole response: " . $response);
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}
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if (! array_key_exists('challenges', $response)) {
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throw new RuntimeException("No challenges received for $domain. Whole response: " . json_encode($response));
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}
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// choose http-01 challenge only
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$challenge = array_reduce($response['challenges'], function ($v, $w) {
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return $v ? $v : ($w['type'] == 'http-01' ? $w : false);
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});
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if (! $challenge) {
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throw new RuntimeException("HTTP Challenge for $domain is not available. Whole response: " . json_encode($response));
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}
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$this->log("Got challenge token for $domain");
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$location = $this->client->getLastLocation();
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// 2. saving authentication token for web verification
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// ---------------------------------------------------
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$directory = Settings::Get('system.letsencryptchallengepath') . '/.well-known/acme-challenge';
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$tokenPath = $directory . '/' . $challenge['token'];
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if (! file_exists($directory) && ! @mkdir($directory, 0755, true)) {
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throw new \RuntimeException("Couldn't create directory to expose challenge: ${tokenPath}");
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}
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$header = array(
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// need to be in precise order!
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"e" => Base64UrlSafeEncoder::encode($accountKeyDetails["rsa"]["e"]),
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"kty" => "RSA",
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"n" => Base64UrlSafeEncoder::encode($accountKeyDetails["rsa"]["n"])
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);
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$payload = $challenge['token'] . '.' . Base64UrlSafeEncoder::encode(hash('sha256', json_encode($header), true));
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file_put_contents($tokenPath, $payload);
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chmod($tokenPath, 0644);
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// 3. verification process itself
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// -------------------------------
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$uri = "http://${domain}/.well-known/acme-challenge/${challenge['token']}";
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$this->log("Token for $domain saved at $tokenPath and should be available at $uri");
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// simple self check
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$selfcheckContextOptions = array('http' => array('header' => "User Agent: Froxlor/".$this->version));
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$selfcheckContext = stream_context_create($selfcheckContextOptions);
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if ($payload !== trim(@file_get_contents($uri, false, $selfcheckContext))) {
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$errmsg = json_encode(error_get_last());
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if ($errmsg != "null") {
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$errmsg = "; PHP error: " . $errmsg;
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} else {
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$errmsg = "";
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}
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@unlink($tokenPath);
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$this->logger->logAction(CRON_ACTION, LOG_ERR, "letsencrypt Please check $uri - token not available" . $errmsg);
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}
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$this->log("Sending request to challenge");
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// send request to challenge
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$result = $this->signedRequest($challenge['uri'], array(
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"resource" => "challenge",
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"type" => "http-01",
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"keyAuthorization" => $payload,
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"token" => $challenge['token']
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));
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// waiting loop
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// we wait for a maximum of 30 seconds to avoid endless loops
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$count = 0;
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do {
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if (empty($result['status']) || $result['status'] == "invalid") {
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@unlink($tokenPath);
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throw new \RuntimeException("Verification ended with error: " . json_encode($result));
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}
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$ended = ! ($result['status'] === "pending");
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if (! $ended) {
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$this->log("Verification pending, sleeping 1s");
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sleep(1);
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$count ++;
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}
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$result = $this->client->get($location);
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} while (! $ended && $count < 30);
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$this->log("Verification ended with status: ${result['status']}");
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@unlink($tokenPath);
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}
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// requesting certificate
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// ----------------------
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// generate private key for domain if not exist
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if (empty($domainkey) || Settings::Get('system.letsencryptreuseold') == 0) {
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$keys = $this->generateKey();
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$domainkey = $keys['private'];
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}
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// load domain key
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$privateDomainKey = openssl_pkey_get_private($domainkey);
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$this->client->getLastLinks();
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if (empty($csr)) {
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$csr = $this->generateCSR($privateDomainKey, $domains);
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}
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// request certificates creation
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$result = $this->signedRequest("/acme/new-cert", array(
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'resource' => 'new-cert',
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'csr' => $csr
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));
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if ($this->client->getLastCode() !== 201) {
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throw new \RuntimeException("Invalid response code: " . $this->client->getLastCode() . ", " . json_encode($result));
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}
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$location = $this->client->getLastLocation();
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// waiting loop
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$certificates = array();
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while (1) {
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$this->client->getLastLinks();
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$result = $this->client->get($location);
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if ($this->client->getLastCode() == 202) {
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$this->log("Certificate generation pending, sleeping 1s");
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sleep(1);
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} else
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if ($this->client->getLastCode() == 200) {
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$this->log("Got certificate! YAY!");
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$certificates[] = $this->parsePemFromBody($result);
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foreach ($this->client->getLastLinks() as $link) {
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$this->log("Requesting chained cert at $link");
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$result = $this->client->get($link);
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$certificates[] = $this->parsePemFromBody($result);
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}
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break;
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} else {
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throw new \RuntimeException("Can't get certificate: HTTP code " . $this->client->getLastCode());
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}
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}
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if (empty($certificates))
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throw new \RuntimeException('No certificates generated');
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$fullchain = implode("\n", $certificates);
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$crt = array_shift($certificates);
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$chain = implode("\n", $certificates);
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$this->log("Done, returning new certificates and key");
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return array(
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'fullchain' => $fullchain,
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'crt' => $crt,
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'chain' => $chain,
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'key' => $domainkey,
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'csr' => $csr
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);
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}
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private function parsePemFromBody($body)
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{
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$pem = chunk_split(base64_encode($body), 64, "\n");
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return "-----BEGIN CERTIFICATE-----\n" . $pem . "-----END CERTIFICATE-----\n";
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}
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private function postNewReg()
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{
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$this->log('Sending registration to letsencrypt server');
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return $this->signedRequest('/acme/new-reg', array(
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'resource' => 'new-reg',
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'agreement' => $this->license
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));
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}
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private function postRegAgreement($uri)
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{
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$this->log('Accepting agreement at URL: ' . $this->license);
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return $this->signedRequest($uri, array(
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'resource' => 'reg',
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'agreement' => $this->license
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));
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}
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private function generateCSR($privateKey, array $domains)
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{
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$domain = reset($domains);
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$san = implode(",", array_map(function ($dns) {
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return "DNS:" . $dns;
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}, $domains));
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$tmpConf = tmpfile();
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$tmpConfMeta = stream_get_meta_data($tmpConf);
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$tmpConfPath = $tmpConfMeta["uri"];
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// workaround to get SAN working
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fwrite($tmpConf, 'HOME = .
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RANDFILE = $ENV::HOME/.rnd
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[ req ]
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default_bits = ' . Settings::Get('system.letsencryptkeysize') . '
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default_keyfile = privkey.pem
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distinguished_name = req_distinguished_name
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req_extensions = v3_req
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[ req_distinguished_name ]
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countryName = Country Name (2 letter code)
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[ v3_req ]
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basicConstraints = CA:FALSE
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subjectAltName = ' . $san . '
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keyUsage = nonRepudiation, digitalSignature, keyEncipherment');
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$csr = openssl_csr_new(array(
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"CN" => $domain,
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"ST" => Settings::Get('system.letsencryptstate'),
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"C" => Settings::Get('system.letsencryptcountrycode'),
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"O" => "Unknown"
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), $privateKey, array(
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"config" => $tmpConfPath,
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"digest_alg" => "sha256"
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));
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if (! $csr)
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throw new \RuntimeException("CSR couldn't be generated! " . openssl_error_string());
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openssl_csr_export($csr, $csr);
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fclose($tmpConf);
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preg_match('~REQUEST-----(.*)-----END~s', $csr, $matches);
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return trim(Base64UrlSafeEncoder::encode(base64_decode($matches[1])));
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}
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private function generateKey()
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{
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$res = openssl_pkey_new(array(
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"private_key_type" => OPENSSL_KEYTYPE_RSA,
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"private_key_bits" => (int) Settings::Get('system.letsencryptkeysize')
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));
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if (! openssl_pkey_export($res, $privateKey)) {
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throw new \RuntimeException("Key export failed!");
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}
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$details = openssl_pkey_get_details($res);
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return array(
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'private' => $privateKey,
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'public' => $details['key']
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);
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}
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private function signedRequest($uri, array $payload)
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{
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$privateKey = openssl_pkey_get_private($this->accountKey);
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$details = openssl_pkey_get_details($privateKey);
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$header = array(
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"alg" => "RS256",
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"jwk" => array(
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"kty" => "RSA",
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"n" => Base64UrlSafeEncoder::encode($details["rsa"]["n"]),
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"e" => Base64UrlSafeEncoder::encode($details["rsa"]["e"])
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)
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);
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$protected = $header;
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$protected["nonce"] = $this->client->getLastNonce();
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$payload64 = Base64UrlSafeEncoder::encode(str_replace('\\/', '/', json_encode($payload)));
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$protected64 = Base64UrlSafeEncoder::encode(json_encode($protected));
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openssl_sign($protected64 . '.' . $payload64, $signed, $privateKey, "SHA256");
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$signed64 = Base64UrlSafeEncoder::encode($signed);
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$data = array(
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'header' => $header,
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'protected' => $protected64,
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'payload' => $payload64,
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'signature' => $signed64
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);
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$this->log("Sending signed request to $uri");
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return $this->client->post($uri, json_encode($data));
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}
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protected function log($message)
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{
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$this->logger->logAction(CRON_ACTION, LOG_INFO, "letsencrypt " . $message);
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}
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}
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class Client
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{
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private $lastCode;
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private $lastHeader;
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private $base;
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public function __construct($base)
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{
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$this->base = $base;
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}
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private function curl($method, $url, $data = null)
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{
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$headers = array(
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'Accept: application/json',
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'Content-Type: application/json'
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);
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$handle = curl_init();
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curl_setopt($handle, CURLOPT_URL, preg_match('~^http~', $url) ? $url : $this->base . $url);
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curl_setopt($handle, CURLOPT_HTTPHEADER, $headers);
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curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($handle, CURLOPT_HEADER, true);
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// DO NOT DO THAT!
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// curl_setopt($handle, CURLOPT_SSL_VERIFYHOST, false);
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// curl_setopt($handle, CURLOPT_SSL_VERIFYPEER, false);
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switch ($method) {
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case 'GET':
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break;
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case 'POST':
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curl_setopt($handle, CURLOPT_POST, true);
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curl_setopt($handle, CURLOPT_POSTFIELDS, $data);
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break;
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}
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$response = curl_exec($handle);
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if (curl_errno($handle)) {
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throw new \RuntimeException('Curl: ' . curl_error($handle));
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}
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$header_size = curl_getinfo($handle, CURLINFO_HEADER_SIZE);
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$header = substr($response, 0, $header_size);
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$body = substr($response, $header_size);
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$this->lastHeader = $header;
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$this->lastCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
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$data = json_decode($body, true);
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return $data === null ? $body : $data;
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}
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public function post($url, $data)
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{
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return $this->curl('POST', $url, $data);
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}
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public function get($url)
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{
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return $this->curl('GET', $url);
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}
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public function getLastNonce()
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{
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if (preg_match('~Replay\-Nonce: (.+)~i', $this->lastHeader, $matches)) {
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return trim($matches[1]);
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}
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$this->curl('GET', '/directory');
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return $this->getLastNonce();
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}
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public function getLastLocation()
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{
|
|
if (preg_match('~Location: (.+)~i', $this->lastHeader, $matches)) {
|
|
return trim($matches[1]);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public function getLastCode()
|
|
{
|
|
return $this->lastCode;
|
|
}
|
|
|
|
public function getLastLinks()
|
|
{
|
|
preg_match_all('~Link: <(.+)>;rel="up"~', $this->lastHeader, $matches);
|
|
return $matches[1];
|
|
}
|
|
|
|
public function getAgreementURL()
|
|
{
|
|
preg_match_all('~Link: <(.+)>;rel="terms-of-service"~', $this->lastHeader, $matches);
|
|
return $matches[1][0];
|
|
}
|
|
|
|
}
|
|
|
|
class Base64UrlSafeEncoder
|
|
{
|
|
|
|
public static function encode($input)
|
|
{
|
|
return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
|
|
}
|
|
|
|
public static function decode($input)
|
|
{
|
|
$remainder = strlen($input) % 4;
|
|
if ($remainder) {
|
|
$padlen = 4 - $remainder;
|
|
$input .= str_repeat('=', $padlen);
|
|
}
|
|
return base64_decode(strtr($input, '-_', '+/'));
|
|
}
|
|
}
|