Streaming to Xbox360 (Optional)

Primetime DRM is available on the Xbox360 platform. However, only the Protected Streaming use case is supported, not the full suite of DRM policy rights. Non-streaming DRM policy rights, such as Device Domain Groups, are not supported. The Xbox360 ignores unsupported rights when attempting to play content.

The supported Primetime DRM Policy rights for the Xbox are:

• Digital Output Protection
• License Offline Caching End Date
• License Start Date
• License End Date
• Playback Window Duration (seconds)

Content may not have to be repackaged to stream to Xbox360, if it was already packaged for another Primetime platform, such as iOS, Android, or Desktop.

One caveat with Xbox360 is that it must always reach out to a key server every time an EXT-X-KEY tag is encountered in the M3U8. Unlike iOS, where a DRM Policy setting (policy.requireKeyServer) will cause the iOS Primetime video player to retrieve the AES decryption key from localhost, Xbox will always attempt to retrieve the decryption key from a remote keyserver . There is no DRM policy right to instruct the Xbox app to retrieve the AES decryption
key from localhost. Because of this requirement, EXT-X-KEY entries must be in the M3U8 pointing to the Primetime Cloud DRM endpoint. This URL is set via <key_url> in the OfflinePackager.jar configuration file config_hls.xml.

If you wish to package content once and have it stream to all Primetime targets, as well as configure iOS devices to not retrieve a key from a remote keyserver, you can package the content using a DRM policy that has the property policy.requireKeyServer=false (such as in policy_ios_localkeyserver.pol). iOS devices will retrieve the AES key locally, while Xbox devices will ignore this property and reach out to the Primetime Cloud DRM key server
for a decryption key.

!Note

All Xbox360 requests must utilize Custom Authentication/>Entitlement.This is because on the Xbox360 platform, Xbox Live >utilizes an Xbox Secure Token Server (XSTS) token for >athentication purposes.
The Primetime Cloud DRM license server uses the XSTS token to >validate the integrity of both the Xbox device and the user making >the license request. However, validating the XSTS token requires a >customer’s private Xbox Live vendor key, which Primetime Cloud DRM >does not store. Because of this, when Primetime Cloud DRM receives >a license request from an Xbox 360 client, Primetime Cloud DRM >will forward the XSTS token to the Primetime customer’s Back-End >Authentication/Entitlement server. The Primetime customer’s server
will then parse and validate the XSTS token to ensure it was >signed using the customer’s application publisher key.
To pass an XSTS token from the Xbox360 client, set the token >synchronously in response to the MediaPlayer.RequestKeyAttribute >event – described in further detail here: Set the XSTS token in your player. A sample Back-End Authentication/Entitlement server >is included with the software release in the Custom Authentication >and Entitlement directory.Validation of XSTS tokens is discussed >in further detail here: Xbox Live XSTS token validation.

Set the XSTS token in your player

In Xbox360, you set the token asynchronously in response to the MediaPlayer.RequestKeyAttribute event.

Set the XSTS token.

The sample app bundled with your software shows how to set the XSTS token in your player. Here is the relevant code snippet from the sample player:

   MediaPlayer mMediaPlayer;

mMediaPlayer.RequestKeyAttribute += Player_RequestKeyAttribute;

private void Player_RequestKeyAttribute(object sender, RequestKeyAttributeEventArgs args) {
    string token = "";
    // XBOX XSTS Token...
    KeyAttribute keyAttribute = new KeyAttribute(System.Text.Encoding.UTF8.GetBytes(token), null);
    mMediaPlayer.SetKeyAttribute(args.RequestIdentifier, keyAttribute);
}

Xbox Live XSTS token validation

For XSTS requests, the customerSpecificAuthToken field will contain the Base64 encoded XSTS token. The sample XSTSValidator code examines the Base64 decoded token for the existence of the EncryptedAssertion element; however, you can use other methods to distinguish between these requests and non-Xbox requests. For example, you could use a different URL.

The policy returned in the response message will override the original policy in the DRM metadata supplied with the Xbox key request. Only a subset of policy features are supported by the Xbox client, and these fields are the only ones that will override the original policy.

There are additional setup steps needed to support token decryption and validation. You must load the xsts_partner_cert.pfx and x_secure_token_service.part.xboxlive.com.cer credentials into a JKS format keystore, which you then provide to your back-end entitlement server as the system property xsts-keystore. By default, the partner .pfx has the alias xsts, and the token validation cert has the alias xsts-verify-cert. You can also override these using system properties. Finally, there is a system property xsts-keystore-password that has no default, and which contains the keystore password. The system properties read by the XSTSValidator code are summarized below:

Create JKS for an XSTS validator

1. Find out the private cert’s alias name, located in the partner .pfx file.

   keytool -list -storetype pkcs12 -keystore xsts_partner_cert.pfx -v
   

2. Convert .pfx to .jks.

   keytool -importkeystore -srckeystore xsts_partner_cert.pfx -srcstoretype PKCS12 \
           -keystore xsts.jks -srcalias
   <alias> -destalias xsts
   

   (where <alias> is the private cert’s alias name that you discovered in Step 1.)

3. Import x_secure_token_service.part.xboxlive.com.cer.

   keytool -importcert -alias xsts-verify-cert -keystore xsts.jks \
           -file x_secure_token_service.part.xboxlive.com.cer
   

4. Put xsts.jks in your Tomcat home directory, and define -Dxsts-keystore-password=**** for Tomcat.

If xsts_partner_cert.pfx and xsts.jks are using different passwords, update the xsts password in jks to make them the same.

keytool -keypasswd -keystore xsts.jks -alias xsts

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