64 lines
2.7 KiB
JavaScript
64 lines
2.7 KiB
JavaScript
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"use strict";
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const tls = require("node:tls");
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function sendSmtpMail({ to, subject, approvalUrl, order, text, smtpHost, smtpPort, smtpUser, smtpPass }) {
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if (!to || !smtpUser || !smtpPass || (!text && !approvalUrl)) return Promise.resolve(false);
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const plain = text || [
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"光湖小湖灯安全协议系统 · 授权请求",
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"",
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`人格体: ${order.persona.name} (${order.persona.pid})`,
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`目标节点: ${order.target}`,
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`授权范围: ${order.scope}`,
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`登记动作: ${order.action}`,
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"有效期: 批准后 1 小时，仅限这台服务器",
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"",
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"打开以下链接查看工单并确认授权：",
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approvalUrl,
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"",
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"如果不是你发起的操作，请不要点击。",
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].join("\n");
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const message = [
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`From: =?UTF-8?B?${Buffer.from("光湖小湖灯").toString("base64")}?= <${smtpUser}>`,
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`To: <${to}>`,
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`Subject: =?UTF-8?B?${Buffer.from(subject).toString("base64")}?=`,
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"MIME-Version: 1.0",
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'Content-Type: text/plain; charset="utf-8"',
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"Content-Transfer-Encoding: base64",
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"",
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Buffer.from(plain).toString("base64").replace(/(.{76})/g, "$1\r\n"),
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".",
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"",
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].join("\r\n");
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return new Promise(resolve => {
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let settled = false;
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const done = value => { if (!settled) { settled = true; resolve(value); } };
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const socket = tls.connect({ host: smtpHost, port: smtpPort, servername: smtpHost, rejectUnauthorized: true });
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let stage = 0;
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let buffer = "";
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socket.setTimeout(15000, () => { socket.destroy(); done(false); });
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socket.on("error", () => done(false));
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socket.on("data", data => {
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buffer += data.toString();
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const lines = buffer.split("\r\n");
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buffer = lines.pop();
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for (const line of lines) {
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if (!/^\d{3}[ -]/.test(line) || line[3] === "-") continue;
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const code = Number(line.slice(0, 3));
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if (code >= 400) { socket.end(); done(false); return; }
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if (stage === 0 && code === 220) { stage = 1; socket.write("EHLO guanghu-lake-lamp\r\n"); }
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else if (stage === 1 && code === 250) { stage = 2; socket.write(`AUTH PLAIN ${Buffer.from(`\0${smtpUser}\0${smtpPass}`).toString("base64")}\r\n`); }
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else if (stage === 2 && code === 235) { stage = 3; socket.write(`MAIL FROM:<${smtpUser}>\r\n`); }
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else if (stage === 3 && code === 250) { stage = 4; socket.write(`RCPT TO:<${to}>\r\n`); }
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else if (stage === 4 && code === 250) { stage = 5; socket.write("DATA\r\n"); }
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else if (stage === 5 && code === 354) { stage = 6; socket.write(message); }
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else if (stage === 6 && code === 250) { socket.write("QUIT\r\n"); socket.end(); done(true); }
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}
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});
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socket.on("close", () => done(false));
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});
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}
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module.exports = { sendSmtpMail };
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