protected override XmlElement SerializeEntity(XmlDocument document, XmlNamespaceManager namespaces, XmlElement container, UsageRule entity)
{
var element = new UsageRuleElement
{
KeyId = entity.KeyId
};
if (entity.VideoFilters?.Count > 0)
{
element.VideoFilters = entity.VideoFilters
.Select(f => new VideoFilterElement
{
MinPixels = f.MinPixels,
MaxPixels = f.MaxPixels,
MinFps = f.MinFramesPerSecond,
MaxFps = f.MaxFramesPerSecond,
Wcg = f.WideColorGamut,
Hdr = f.HighDynamicRange
})
.ToArray();
}
if (entity.AudioFilters?.Count > 0)
{
element.AudioFilters = entity.AudioFilters
.Select(f => new AudioFilterElement
{
MinChannels = f.MinChannels,
MaxChannels = f.MaxChannels
})
.ToArray();
}
if (entity.BitrateFilters?.Count > 0)
{
element.BitrateFilters = entity.BitrateFilters
.Select(f => new BitrateFilterElement
{
MinBitrate = f.MinBitrate,
MaxBitrate = f.MaxBitrate
})
.ToArray();
}
if (entity.LabelFilters?.Count > 0)
{
element.LabelFilters = entity.LabelFilters
.Select(f => new LabelFilterElement
{
Label = f.Label
})
.ToArray();
}
return(XmlHelpers.AppendChildAndReuseNamespaces(element, container));
}
protected override XmlElement SerializeEntity(XmlDocument document, XmlNamespaceManager namespaces, XmlElement container, DrmSystem entity)
{
var drmSystemElement = new DrmSystemElement
{
SystemId = entity.SystemId,
KeyId = entity.KeyId,
Pssh = entity.Pssh,
SmoothStreamingProtectionHeaderData = entity.SmoothStreamingProtectionHeaderData
};
if (entity.ContentProtectionData != null)
{
drmSystemElement.ContentProtectionData = Convert.ToBase64String(Encoding.UTF8.GetBytes(entity.ContentProtectionData));
}
if (entity.HdsSignalingData != null)
{
drmSystemElement.HdsSignalingData = Convert.ToBase64String(Encoding.UTF8.GetBytes(entity.HdsSignalingData));
}
if (entity.HlsSignalingData?.MasterPlaylistData != null)
{
drmSystemElement.HlsSignalingData.Add(new HlsSignalingDataElement
{
Playlist = HlsPlaylistType.Master,
Value = Convert.ToBase64String(Encoding.UTF8.GetBytes(entity.HlsSignalingData.MasterPlaylistData))
});
}
if (entity.HlsSignalingData?.MediaPlaylistData != null)
{
drmSystemElement.HlsSignalingData.Add(new HlsSignalingDataElement
{
Playlist = HlsPlaylistType.Media,
Value = Convert.ToBase64String(Encoding.UTF8.GetBytes(entity.HlsSignalingData.MediaPlaylistData))
});
}
return(XmlHelpers.AppendChildAndReuseNamespaces(drmSystemElement, container));
}
protected override XmlElement SerializeEntity(XmlDocument document, XmlNamespaceManager namespaces, XmlElement container, Recipient entity)
{
var recipientRsa = entity.Certificate.GetRSAPublicKey();
// Ensure that we have the document-scoped cryptographic material available.
if (Document.DocumentKey == null)
{
Document.GenerateKeys();
}
var encryptedDocumentKey = recipientRsa.Encrypt(Document.DocumentKey, RSAEncryptionPadding.OaepSHA1);
var encryptedMacKey = recipientRsa.Encrypt(Document.MacKey, RSAEncryptionPadding.OaepSHA1);
var element = new DeliveryDataElement
{
DeliveryKey = new DeliveryKeyElement
{
X509Data = new X509Data
{
Certificate = entity.Certificate.GetRawCertData()
}
},
DocumentKey = new DocumentKeyElement
{
Algorithm = Constants.Aes256CbcAlgorithm,
Data = new DataElement
{
Secret = new SecretDataElement
{
EncryptedValue = new EncryptedXmlValue
{
EncryptionMethod = new EncryptionMethodDeclaration
{
Algorithm = Constants.RsaOaepAlgorithm
},
CipherData = new CipherDataContainer
{
CipherValue = encryptedDocumentKey
}
}
}
}
},
MacMethod = new MacMethodElement
{
Algorithm = Constants.HmacSha512Algorithm,
Key = new EncryptedXmlValue
{
EncryptionMethod = new EncryptionMethodDeclaration
{
Algorithm = Constants.RsaOaepAlgorithm
},
CipherData = new CipherDataContainer
{
CipherValue = encryptedMacKey
}
}
}
};
return(XmlHelpers.AppendChildAndReuseNamespaces(element, container));
}
protected override XmlElement SerializeEntity(XmlDocument document, XmlNamespaceManager namespaces, XmlElement container, ContentKey entity)
{
var element = new ContentKeyElement
{
KeyId = entity.Id,
ExplicitIv = entity.ExplicitIv,
Data = new DataElement
{
Secret = new SecretDataElement()
}
};
if (Document.Recipients.Any())
{
// We have to encrypt the key. Okay. Ensure we have the crypto values available.
if (Document.DocumentKey == null)
{
Document.GenerateKeys();
}
// Unique IV is generated for every content key.
var iv = new byte[128 / 8];
using (var random = RandomNumberGenerator.Create())
random.GetBytes(iv);
var aes = new AesManaged
{
BlockSize = 128,
KeySize = 256,
Key = Document.DocumentKey,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7,
IV = iv
};
var mac = new HMACSHA512(Document.MacKey);
using (var encryptor = aes.CreateEncryptor())
{
var encryptedValue = encryptor.TransformFinalBlock(entity.Value, 0, entity.Value.Length);
// NB! We prepend the IV to the value when saving an encrypted value to the document field.
var fieldValue = iv.Concat(encryptedValue).ToArray();
element.Data.Secret.EncryptedValue = new EncryptedXmlValue
{
CipherData = new CipherDataContainer
{
CipherValue = fieldValue
},
EncryptionMethod = new EncryptionMethodDeclaration
{
Algorithm = Constants.Aes256CbcAlgorithm
}
};
// Never not MAC.
element.Data.Secret.ValueMAC = mac.ComputeHash(fieldValue);
}
}
else
{
// We are saving the key in the clear.
element.Data.Secret.PlainValue = entity.Value;
}
return(XmlHelpers.AppendChildAndReuseNamespaces(element, container));
}