276 lines
8.8 KiB
PHP
276 lines
8.8 KiB
PHP
<?php
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/*************************************************************
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# 076 License
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Copyright (c) テクニカル諏訪子
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Permission is hereby granted to any person obtaining a copy of the software
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Little Beast (the "Software") to use, modify, merge, copy, publish, distribute,
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sublicense, and/or sell copies of the Software, subject to the following conditions:
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1. **Origin Attribution**:
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- You must not misrepresent the origin of the Software; you must not claim
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you created the original Software.
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- If the Software is used in a product, you must either:
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a. Provide clear attribution in the product's documentation, user interface,
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or other visible areas, **OR**
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b. Pay the original developers a fee they specify in writing.
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2. **Usage Restriction**:
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- The Software, or any derivative works, dependencies, or libraries
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incorporating it, must not be used for censorship or to suppress freedom of
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speech, expression, or creativity. Prohibited uses include, but are not
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limited to:
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- Censorship of so-called "hate speech", visuals, non-mainstream opinions,
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ideas, or objective reality.
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- Tools or systems designed to restrict access to information or
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artistic works.
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3. **Notice Preservation**:
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- This license and the above copyright notice must remain intact in all copies
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of the source code.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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namespace Std\Lib;
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use LogType;
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class Mailer {
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private $socket;
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private string $host;
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private int $port;
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private ?string $user;
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private ?string $pass;
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private ?string $pgpKey;
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private ?string $pgpPass;
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/**
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* コンストラクタ
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*/
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public function __construct() {
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if (!MAILER_ENABLED) {
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throw new \Exception("メーラーは無効です。");
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}
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$this->host = MAILINFO['host'];
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$this->port = MAILINFO['port'];
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$this->user = MAILINFO['user'];
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$this->pass = MAILINFO['pass'];
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}
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/**
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* ソケット接続を開く。
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*
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* @return void
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*/
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public function connect(): void {
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$this->socket = fsockopen($this->host, $this->port, $errno, $err, 30);
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if (!$this->socket) {
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$msg = "接続に失敗: {$err} ({$errno})";
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logger(LogType::Mailer, $msg);
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throw new \Exception($msg);
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}
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$this->readResponse();
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}
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/**
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* ソケット接続を切断する。
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*
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* @return void
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*/
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public function disconnect(): void {
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$this->sendCommand('QUIT', 221);
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fclose($this->socket);
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}
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/**
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* サーバーで認証する。
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* ユーザー名とパスワードが指定されている場合はAUTH LOGINを使用する。
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*
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* @return void
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*/
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public function authenticate(): void {
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$ehloRes = $this->sendCommand('EHLO '.$this->host, 250);
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// STARTTLSは対応するかどうか確認
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if (strpos($ehloRes, 'STARTTLS') !== false) {
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$this->sendCommand('STARTTLS', 220);
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// TLS暗号化
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if (!stream_socket_enable_crypto(
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$this->socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
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$msg = "TLSハンドシェイクに失敗";
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logger(LogType::Mailer, $msg);
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throw new \Exception($msg);
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}
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$this->sendCommand('EHLO '.gethostname(), 250);
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}
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if ($this->user && $this->pass) {
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$this->sendCommand('AUTH LOGIN', 334);
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$this->sendCommand(base64_encode($this->user), 334);
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$this->sendCommand(base64_encode($this->pass), 235);
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}
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}
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/**
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* TLSハンドシェイクに失敗する。
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*
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* @param string $to 受信者のメールアドレス。
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* @param string $subject メールの件名。
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* @param string $body メールの本文。
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* @param string|null $toName 受信者の名前。
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* @param string|null $replyTo 返信先メールアドレス。
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* @param string|null $replyToName 返信先の名前。
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* @param bool $pgpSign PGPで署名するかどうか（現在は正常に動作していません）。
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*
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* @return void
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*/
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public function send(
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string $to,
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string $subject,
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string $body,
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?string $toName = null,
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?string $replyTo = null,
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?string $replyToName = null,
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bool $pgpSign = false
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): void {
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$from = MAILINFO['from'];
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$this->sendCommand("MAIL FROM: <{$from}>", 250);
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$this->sendCommand("RCPT TO: <{$to}>", 250);
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$this->sendCommand('DATA', 354);
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$headers = "Date: ".date('r')."\r\n"; // RFC 2822
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$encSubject = mb_encode_mimeheader($subject, 'UTF-8', 'Q');
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$headers .= "Subject: {$encSubject}\r\n";
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$fromHeader = mb_encode_mimeheader(SITEINFO['title'], 'UTF-8', 'Q')." <{$from}>";
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$headers .= "From: {$fromHeader}\r\n";
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$toHeader = $toName
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? mb_encode_mimeheader($toName, 'UTF-8', 'Q')." <{$to}>" : $to;
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$headers .= "To: {$toHeader}\r\n";
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if ($replyTo) {
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$replyToHeader = $replyToName
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? mb_encode_mimeheader($replyToName, 'UTF-8', 'Q')." <{$replyTo}>" : $replyTo;
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$headers .= "Reply-To: {$replyToHeader}\r\n";
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}
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$headers .= "MIME-Version: 1.0\r\n";
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if ($pgpSign) {
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$boundary = uniqid('BOUNDARY_');
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$headers .= "Content-Type: multipart/signed;\r\n";
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$headers .= " protocol=\"application/pgp-signature\";\r\n";
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$headers .= " micalg=php-sha512;\r\n";
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$headers .= " boundary=\"{$boundary}\"\r\n";
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} else {
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$headers .= "Content-Type: text/plain; charset=utf-8\r\n";
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$headers .= "Content-Transfer-Encoding: quoted-printable\r\n";
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}
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$headers .= "X-Mailer: 076 Little Beast\r\n";
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$encBody = quoted_printable_encode($body);
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$data = $headers."\r\n".$encBody;
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if ($pgpSign) {
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$signature = $this->signMessage($data);
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$data = "--{$boundary}\r\n"
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.$data."\r\n"
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."Content-Type: application/pgp-signature; name=\"signature.asc\"\r\n"
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."Content-Disposition: attachment; filename=\"signature.asc\"\r\n\r\n"
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.$signature."\r\n"
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."--{$boundary}--\r\n";
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}
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$data .= "\r\n.\r\n";
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fwrite($this->socket, $data);
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$response = $this->readResponse();
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if (substr($response, 0, 3) != '250') {
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$msg = "メール送信に失敗: {$response}";
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logger(LogType::Mailer, $msg);
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throw new \Exception($msg);
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}
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}
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/**
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* お好みのタイムゾーンを設定する。
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* 設定しない場合、php.iniで設定されたタイムゾーンがデフォルトになる。
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* それも設定されていない場合、GMTタイムゾーンがデフォルトになる。
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*
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* @param string $zone IANAタイムゾーンデータベース標準のタイムゾーン（例：Asia/Tokyo）
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* @return void
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*/
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public function setTimezone(string $zone): void {
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date_default_timezone_set($zone);
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}
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/**
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* PGPキーとオプションでパスフレーズを設定する。
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*
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* @param string $keypath PGP署名に使用する秘密鍵へのパス。
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* @param string|null $passphrase 設定されている場合、署名用のパスフレーズ。
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*
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* @return void
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*/
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public function enablePGP(string $keypath, ?string $passphrase = null): void {
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$this->pgpKey = file_get_contents($keypath);
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$this->pgpPass = $passphrase;
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}
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// 機能性メソッド
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private function sendCommand(string $command, int $retcode): string {
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fwrite($this->socket, $command."\r\n");
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$res = $this->readResponse();
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if (substr($res, 0, 3) != $retcode) {
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$msg = "「{$command}」に対する予期しないレスポンス: {$res}";
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logger(LogType::Mailer, $msg);
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throw new \Exception($msg);
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}
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return $res;
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}
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private function readResponse(): string {
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$res = '';
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while ($line = fgets($this->socket, 515)) {
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$res .= $line;
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if (substr($line, 3, 1) == ' ') break; // レスポンスの終了だ
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}
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return $res;
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}
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private function signMessage(string $message): string {
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if (extension_loaded('gnupg')) {// gnupg延長は有効の場合
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$gpg = new \gnupg();
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$gpg->addsignkey($this->pgpKey, $this->pgpPass);
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$gpg->setsignmode(\gnupg::SIG_MODE_DETACH);
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return $gpg->sign($message);
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} else { // なければ、CLIツールを使う（gnupgをインストールは必須）
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$tmp = tempnam(sys_get_temp_dir(), 'pgpmsg');
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file_put_contents($tmp, $message);
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$sig = shell_exec(
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"gpg --batch "
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.($this->pgpPass ? "--passphrase {$this->pgpPass} " : '')
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."--detach-sign --armor {$tmp} 2>&1"
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);
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unlink($tmp);
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return $sig;
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}
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}
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} |