115 lines
3.7 KiB
C#
115 lines
3.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Net.Http;
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using System.Text;
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using System.Threading.Tasks;
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using Newtonsoft.Json;
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namespace CRD.Utils.DRM;
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public class Widevine{
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private byte[] privateKey = new byte[0];
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private byte[] identifierBlob = new byte[0];
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public bool canDecrypt = false;
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#region Singelton
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private static Widevine? instance;
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private static readonly object padlock = new object();
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public static Widevine Instance{
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get{
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if (instance == null){
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lock (padlock){
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if (instance == null){
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instance = new Widevine();
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}
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}
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}
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return instance;
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}
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}
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#endregion
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public Widevine(){
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try{
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if (Directory.Exists(CfgManager.PathWIDEVINE_DIR)){
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var files = Directory.GetFiles(CfgManager.PathWIDEVINE_DIR);
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foreach (var file in files){
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var fileInfo = new FileInfo(file);
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if (fileInfo.Length < 1024 * 8 && !fileInfo.Attributes.HasFlag(FileAttributes.Directory)){
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string fileContents = File.ReadAllText(file, Encoding.UTF8);
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if (fileContents.Contains("-BEGIN RSA PRIVATE KEY-")){
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privateKey = File.ReadAllBytes(file);
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}
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if (fileContents.Contains("widevine_cdm_version")){
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identifierBlob = File.ReadAllBytes(file);
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}
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}
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}
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}
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if (privateKey.Length != 0 && identifierBlob.Length != 0){
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canDecrypt = true;
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} else if (privateKey.Length == 0){
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Console.Error.WriteLine("Private key missing");
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canDecrypt = false;
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} else if (identifierBlob.Length == 0){
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Console.Error.WriteLine("Identifier blob missing");
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canDecrypt = false;
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}
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} catch (Exception e){
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Console.Error.WriteLine("Widevine: " + e);
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canDecrypt = false;
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}
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}
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public async Task<List<ContentKey>> getKeys(string? pssh, string licenseServer, Dictionary<string, string> authData){
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if (pssh == null || !canDecrypt) return new List<ContentKey>();
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try{
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byte[] psshBuffer = Convert.FromBase64String(pssh);
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Session ses = new Session(new ContentDecryptionModule{ identifierBlob = identifierBlob, privateKey = privateKey }, psshBuffer);
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var playbackRequest2 = new HttpRequestMessage(HttpMethod.Post, licenseServer);
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foreach (var keyValuePair in authData){
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playbackRequest2.Headers.Add(keyValuePair.Key, keyValuePair.Value);
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}
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var licenceReq = ses.GetLicenseRequest();
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playbackRequest2.Content = new ByteArrayContent(licenceReq);
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var response = await HttpClientReq.Instance.SendHttpRequest(playbackRequest2);
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if (!response.IsOk){
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Console.Error.WriteLine("Failed to get Keys!");
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return new List<ContentKey>();
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}
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LicenceReqResp resp = Helpers.Deserialize<LicenceReqResp>(response.ResponseContent, null) ?? new LicenceReqResp();
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ses.ProvideLicense(Convert.FromBase64String(resp.license));
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return ses.ContentKeys;
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} catch (Exception e){
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Console.Error.WriteLine(e);
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return new List<ContentKey>();
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}
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}
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}
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public class LicenceReqResp{
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public string status{ get; set; }
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public string license{ get; set; }
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public string platform{ get; set; }
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public string message_type{ get; set; }
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} |