Add DRM downloads, scrapers, gallery index, and UI improvements
- DRM video download pipeline with pywidevine subprocess for Widevine key acquisition - Scraper system: forum threads, Coomer/Kemono API, and MediaLink (Fapello) scrapers - SQLite-backed media index for instant gallery loads with startup scan - Duplicate detection and gallery filtering/sorting - HLS video component, log viewer, and scrape management UI - Dockerfile updated for Python/pywidevine, docker-compose volume for CDM Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Trey t
330
server/widevine.js
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330
server/widevine.js
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import crypto from 'node:crypto';
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import { readFileSync, existsSync } from 'node:fs';
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// ==================== Minimal Protobuf Codec ====================
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function encodeVarint(value) {
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const bytes = [];
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value = value >>> 0;
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do {
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let b = value & 0x7f;
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value >>>= 7;
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if (value > 0) b |= 0x80;
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bytes.push(b);
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} while (value > 0);
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return Buffer.from(bytes);
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}
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function encodeVarintField(fieldNumber, value) {
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const tag = encodeVarint((fieldNumber << 3) | 0);
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const val = encodeVarint(value);
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return Buffer.concat([tag, val]);
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}
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function encodeBytesField(fieldNumber, data) {
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if (!Buffer.isBuffer(data)) data = Buffer.from(data);
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const tag = encodeVarint((fieldNumber << 3) | 2);
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const len = encodeVarint(data.length);
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return Buffer.concat([tag, len, data]);
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}
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function decodeVarintAt(buf, offset) {
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let value = 0, shift = 0;
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while (offset < buf.length) {
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const b = buf[offset++];
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value |= (b & 0x7f) << shift;
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if (!(b & 0x80)) break;
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shift += 7;
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if (shift > 35) throw new Error('Varint too long');
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}
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return [value >>> 0, offset];
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}
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function decodeProtobuf(buf) {
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const fields = [];
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let offset = 0;
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while (offset < buf.length) {
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const [tag, off1] = decodeVarintAt(buf, offset);
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offset = off1;
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const fieldNum = tag >>> 3;
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const wireType = tag & 0x7;
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if (wireType === 0) {
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const [value, off2] = decodeVarintAt(buf, offset);
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offset = off2;
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fields.push({ field: fieldNum, type: wireType, value });
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} else if (wireType === 2) {
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const [length, off2] = decodeVarintAt(buf, offset);
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offset = off2;
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fields.push({ field: fieldNum, type: wireType, data: Buffer.from(buf.subarray(offset, offset + length)) });
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offset += length;
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} else if (wireType === 1) {
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offset += 8;
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} else if (wireType === 5) {
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offset += 4;
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} else {
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break;
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}
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}
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return fields;
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}
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// ==================== PSSH Box Parser ====================
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export function parsePsshBox(base64Data) {
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const box = Buffer.from(base64Data, 'base64');
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let offset = 0;
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const size = box.readUInt32BE(offset); offset += 4;
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const type = box.subarray(offset, offset + 4).toString('ascii'); offset += 4;
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if (type !== 'pssh') throw new Error('Not a PSSH box');
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const version = box[offset]; offset += 4; // version (1) + flags (3)
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const systemId = box.subarray(offset, offset + 16); offset += 16;
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if (version === 1) {
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const kidCount = box.readUInt32BE(offset); offset += 4;
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offset += kidCount * 16;
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}
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const dataSize = box.readUInt32BE(offset); offset += 4;
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const initData = Buffer.from(box.subarray(offset, offset + dataSize));
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return { version, systemId: systemId.toString('hex'), initData };
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}
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// ==================== WVD File Parser ====================
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function parseWvdFile(path) {
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const data = readFileSync(path);
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let offset = 0;
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const magic = data.subarray(0, 3).toString('ascii');
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if (magic !== 'WVD') throw new Error('Invalid WVD file');
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offset += 3;
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const version = data[offset++];
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if (version !== 2) throw new Error(`Unsupported WVD version: ${version}`);
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const deviceType = data[offset++];
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const securityLevel = data[offset++];
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const flags = data[offset++];
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const pkLen = data.readUInt16BE(offset); offset += 2;
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const privateKeyDer = Buffer.from(data.subarray(offset, offset + pkLen)); offset += pkLen;
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const cidLen = data.readUInt16BE(offset); offset += 2;
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const clientId = Buffer.from(data.subarray(offset, offset + cidLen));
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// Try PKCS8 first, fall back to PKCS1 (RSA)
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let privateKey;
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try {
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privateKey = crypto.createPrivateKey({ key: privateKeyDer, format: 'der', type: 'pkcs8' });
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} catch {
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privateKey = crypto.createPrivateKey({ key: privateKeyDer, format: 'der', type: 'pkcs1' });
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}
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return { deviceType, securityLevel, flags, privateKey, clientId };
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}
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// ==================== Service Certificate Parser ====================
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function parseServiceCertResponse(responseBuffer) {
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// Response is a SignedMessage: type(1), msg(2), signature(3)
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const signed = decodeProtobuf(responseBuffer);
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let msgBytes = null;
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for (const f of signed) {
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if (f.field === 2 && f.type === 2) msgBytes = f.data;
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}
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if (!msgBytes) throw new Error('No msg in service cert response');
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// msg is a SignedDrmCertificate: drm_certificate(1), signature(2)
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const signedCert = decodeProtobuf(msgBytes);
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let certBytes = null;
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for (const f of signedCert) {
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if (f.field === 1 && f.type === 2) certBytes = f.data;
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}
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if (!certBytes) throw new Error('No certificate in service cert response');
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// DrmCertificate: type(1), serial_number(2), creation_time(3), public_key(4),
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// system_id(7), provider_id(6 or bytes field)
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const cert = decodeProtobuf(certBytes);
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let publicKeyDer = null;
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let serialNumber = null;
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let providerId = null;
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for (const f of cert) {
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if (f.field === 4 && f.type === 2) publicKeyDer = f.data;
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if (f.field === 2 && f.type === 2) serialNumber = f.data;
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if (f.field === 6 && f.type === 2) providerId = f.data;
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}
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if (!publicKeyDer) throw new Error('No public key in service certificate');
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// Try SPKI first, fall back to PKCS1
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let publicKey;
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try {
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publicKey = crypto.createPublicKey({ key: publicKeyDer, format: 'der', type: 'spki' });
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} catch {
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publicKey = crypto.createPublicKey({ key: publicKeyDer, format: 'der', type: 'pkcs1' });
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}
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return { publicKey, serialNumber, providerId };
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}
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// ==================== Widevine CDM ====================
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export class WidevineCDM {
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constructor(wvdPath) {
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if (!existsSync(wvdPath)) throw new Error(`WVD file not found: ${wvdPath}`);
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const device = parseWvdFile(wvdPath);
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this.privateKey = device.privateKey;
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this.clientId = device.clientId;
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this.securityLevel = device.securityLevel;
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console.log(`[widevine] CDM initialized (L${device.securityLevel})`);
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}
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static get SERVICE_CERTIFICATE_CHALLENGE() {
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return Buffer.from([0x08, 0x04]);
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}
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parseServiceCertificate(responseBuffer) {
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return parseServiceCertResponse(responseBuffer);
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}
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generateChallenge(psshInitData, serviceCert) {
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// WidevinePsshContentId: pssh_data(1), license_type(2), request_id(3)
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const requestId = crypto.randomBytes(16);
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const wvPsshData = Buffer.concat([
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encodeBytesField(1, psshInitData),
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encodeVarintField(2, 1), // STREAMING
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encodeBytesField(3, requestId),
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]);
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// ContentIdentification: widevine_pssh_data(1)
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const contentId = encodeBytesField(1, wvPsshData);
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// Build client identification (privacy mode if service cert available)
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let clientIdField;
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if (serviceCert) {
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// Privacy mode: encrypt client ID with service certificate's public key
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const privacyKey = crypto.randomBytes(16);
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const privacyIv = crypto.randomBytes(16);
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// AES-128-CBC encrypt the client ID
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const cipher = crypto.createCipheriv('aes-128-cbc', privacyKey, privacyIv);
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const encryptedClientId = Buffer.concat([cipher.update(this.clientId), cipher.final()]);
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// RSA-OAEP encrypt the AES key with service cert's public key
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const encryptedPrivacyKey = crypto.publicEncrypt(
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{
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key: serviceCert.publicKey,
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padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
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oaepHash: 'sha1',
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},
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privacyKey,
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);
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// EncryptedClientIdentification:
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// provider_id(1), service_certificate_serial_number(2),
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// encrypted_client_id(3), encrypted_client_id_iv(4),
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// encrypted_privacy_key(5)
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const encClientId = Buffer.concat([
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serviceCert.providerId ? encodeBytesField(1, serviceCert.providerId) : Buffer.alloc(0),
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serviceCert.serialNumber ? encodeBytesField(2, serviceCert.serialNumber) : Buffer.alloc(0),
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encodeBytesField(3, encryptedClientId),
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encodeBytesField(4, privacyIv),
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encodeBytesField(5, encryptedPrivacyKey),
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]);
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// LicenseRequest field 8 = encrypted_client_id
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clientIdField = encodeBytesField(8, encClientId);
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} else {
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// No privacy mode: send raw client ID
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// LicenseRequest field 1 = client_id
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clientIdField = encodeBytesField(1, this.clientId);
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}
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// LicenseRequest: content_id(2), type(3), request_time(4),
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// protocol_version(6), key_control_nonce(7)
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const licenseRequest = Buffer.concat([
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clientIdField,
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encodeBytesField(2, contentId),
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encodeVarintField(3, 1), // NEW
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encodeVarintField(4, Math.floor(Date.now() / 1000)),
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encodeVarintField(6, 21),
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encodeVarintField(7, crypto.randomInt(1, 2 ** 31)),
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]);
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// Sign with RSA PKCS1v15 SHA1
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const signature = crypto.sign('sha1', licenseRequest, {
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key: this.privateKey,
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padding: crypto.constants.RSA_PKCS1_PADDING,
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});
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// SignedMessage: type(1)=LICENSE_REQUEST, msg(2), signature(3)
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return Buffer.concat([
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encodeVarintField(1, 1),
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encodeBytesField(2, licenseRequest),
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encodeBytesField(3, signature),
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]);
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}
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parseLicenseResponse(responseBuffer) {
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const signed = decodeProtobuf(responseBuffer);
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let encSessionKey = null;
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let licenseMsg = null;
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for (const f of signed) {
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if (f.field === 4 && f.type === 2) encSessionKey = f.data;
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if (f.field === 2 && f.type === 2) licenseMsg = f.data;
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}
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if (!encSessionKey) throw new Error('No session key in license response');
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if (!licenseMsg) throw new Error('No license message in response');
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// Decrypt session key with RSA-OAEP SHA1
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const sessionKey = crypto.privateDecrypt(
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{
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key: this.privateKey,
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padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
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oaepHash: 'sha1',
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},
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encSessionKey,
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);
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// Parse License — KeyContainer is at field 3
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const license = decodeProtobuf(licenseMsg);
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const keys = [];
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for (const f of license) {
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if (f.field === 3 && f.type === 2) {
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const kc = decodeProtobuf(f.data);
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let kid = null, iv = null, encKey = null, keyType = 0;
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for (const kf of kc) {
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if (kf.field === 1 && kf.type === 2) kid = kf.data;
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if (kf.field === 2 && kf.type === 2) iv = kf.data;
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if (kf.field === 3 && kf.type === 2) encKey = kf.data;
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if (kf.field === 4 && kf.type === 0) keyType = kf.value;
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}
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if (encKey && iv) {
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const algo = sessionKey.length === 16 ? 'aes-128-cbc' : 'aes-256-cbc';
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const decipher = crypto.createDecipheriv(algo, sessionKey, iv);
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const decrypted = Buffer.concat([decipher.update(encKey), decipher.final()]);
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keys.push({
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kid: kid ? kid.toString('hex') : null,
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key: decrypted.toString('hex'),
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type: keyType, // 2 = CONTENT
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});
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}
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}
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}
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const contentKeys = keys.filter(k => k.type === 2);
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return contentKeys.length > 0 ? contentKeys : keys;
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}
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}
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