44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
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const fs = require('node:fs');
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const path = require('node:path');
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const crypto = require('node:crypto');
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const BOSS_AES_KEY = process.env.BOSS_AES_KEY;
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const BOSS_HMAC_KEY = process.env.BOSS_HMAC_KEY;
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async function run() {
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try {
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if (!BOSS_AES_KEY || !BOSS_HMAC_KEY) {
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process.stderr.write("decrypt: missing environment keys\n");
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process.exit(1);
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}
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const data = fs.readFileSync(process.argv[2]);
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const IV = Buffer.concat([
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data.subarray(0x0C, 0x18),
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Buffer.from([0x00, 0x00, 0x00, 0x01])
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]);
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const decipher = crypto.createDecipheriv('aes-128-ctr', Buffer.from(BOSS_AES_KEY, 'hex'), IV);
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const decrypted = Buffer.concat([decipher.update(data.subarray(0x20)), decipher.final()]);
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const hmac = decrypted.subarray(0, 0x20);
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const content = decrypted.subarray(0x20);
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const calculatedHmac = crypto.createHmac('sha256', Buffer.from(BOSS_HMAC_KEY, 'hex'))
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.update(content)
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.digest();
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if (!calculatedHmac.equals(hmac)) {
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process.stderr.write("Console HMAC check failed. Is the key correct?\n");
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process.exit(1);
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}
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process.stdout.write(content);
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} catch (err) {
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process.stderr.write(`decrypt.js: ${err.message}\n`);
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process.exit(1);
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}
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}
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run();
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