8b26e905c6
+ Changed session ids from int to byte[] + Fixed BigInteger->byte[] conversion + Removed GetWrmHeaders() + Improved PSSH parsing
86 lines
4.1 KiB
Markdown
86 lines
4.1 KiB
Markdown
# csplayready
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C# implementation of Microsoft's Playready DRM CDM (Content Decryption Module)
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## Installation
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```shell
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dotnet add package csplayready
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```
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Run `csplayready --help` to view available cli functions
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## Devices
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Run the command below to create a Playready Device (.prd) from a `bgroupcert.dat` and `zgpriv.dat`:
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```shell
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csplayready create-device -c bgroupcert.dat -k zgpriv.dat
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```
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Test a playready device:
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```shell
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csplayready test DEVICE.prd
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```
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> [!IMPORTANT]
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> There currently isn't a proper method of extracting Group Certificates/Keys. They can be found inside older Samsung phones/Smart TVs, Windows DLLs and set-top-boxes in encrypted form.
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Export a provisioned device to its raw .dat files
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```shell
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csplayready export-device DEVICE.prd
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```
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## Usage
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An example code snippet:
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```csharp
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var device = Device.Load("C:/Path/To/A/Device.prd");
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var cdm = Cdm.FromDevice(device);
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var sessionId = cdm.Open();
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var pssh = new Pssh(
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"AAADfHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAA1xcAwAAAQABAFIDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4A" +
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"cwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAA" +
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"NwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIA" +
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"PgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4A" +
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"PABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBJAEQA" +
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"PgA0AFIAcABsAGIAKwBUAGIATgBFAFMAOAB0AEcAawBOAEYAVwBUAEUASABBAD0APQA8AC8ASwBJAEQAPgA8AEMASABFAEMASwBTAFUA" +
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"TQA+AEsATABqADMAUQB6AFEAUAAvAE4AQQA9ADwALwBDAEgARQBDAEsAUwBVAE0APgA8AEwAQQBfAFUAUgBMAD4AaAB0AHQAcABzADoA" +
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"LwAvAHAAcgBvAGYAZgBpAGMAaQBhAGwAcwBpAHQAZQAuAGsAZQB5AGQAZQBsAGkAdgBlAHIAeQAuAG0AZQBkAGkAYQBzAGUAcgB2AGkA" +
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"YwBlAHMALgB3AGkAbgBkAG8AdwBzAC4AbgBlAHQALwBQAGwAYQB5AFIAZQBhAGQAeQAvADwALwBMAEEAXwBVAFIATAA+ADwAQwBVAFMA" +
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"VABPAE0AQQBUAFQAUgBJAEIAVQBUAEUAUwA+ADwASQBJAFMAXwBEAFIATQBfAFYARQBSAFMASQBPAE4APgA4AC4AMQAuADIAMwAwADQA" +
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"LgAzADEAPAAvAEkASQBTAF8ARABSAE0AXwBWAEUAUgBTAEkATwBOAD4APAAvAEMAVQBTAFQATwBNAEEAVABUAFIASQBCAFUAVABFAFMA" +
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"PgA8AC8ARABBAFQAQQA+ADwALwBXAFIATQBIAEUAQQBEAEUAUgA+AA==");
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var challenge = cdm.GetLicenseChallenge(sessionId, pssh.WrmHeaders.First());
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using HttpClient client = new HttpClient();
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var content = new StringContent(challenge, Encoding.UTF8, "text/xml");
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const string server = "https://test.playready.microsoft.com/service/rightsmanager.asmx?cfg=(persist:false,sl:2000)";
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HttpResponseMessage response = client.PostAsync(server, content).Result;
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var responseBody = response.Content.ReadAsStringAsync().Result;
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cdm.ParseLicense(sessionId, responseBody);
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foreach (var key in cdm.GetKeys(sessionId))
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Console.WriteLine($"{key.KeyId.ToHex()}:{key.RawKey.ToHex()}");
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cdm.Close(sessionId);
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```
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## Disclaimer
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1. This project requires a valid Microsoft Certificate and Group Key, which are not provided by this project.
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2. Public test provisions are available and provided by Microsoft to use for testing projects such as this one.
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3. This project does not condone piracy or any action against the terms of the DRM systems.
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4. All efforts in this project have been the result of Reverse-Engineering, Publicly available research, and Trial & Error.
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5. Do not use this program to decrypt or access any content for which you do not have the legal rights or explicit permission.
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6. Unauthorized decryption or distribution of copyrighted materials is a violation of applicable laws and intellectual property rights.
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7. This tool must not be used for any illegal activities, including but not limited to piracy, circumventing digital rights management (DRM), or unauthorized access to protected content.
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8. The developers, contributors, and maintainers of this program are not responsible for any misuse or illegal activities performed using this software.
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9. By using this program, you agree to comply with all applicable laws and regulations governing digital rights and copyright protections.
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## Credits
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+ [mspr_toolkit](https://security-explorations.com/materials/mspr_toolkit.zip)
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