/// <summary>
/// Decrypt a received <see cref="SignalServiceEnvelope"/>
/// </summary>
/// <param name="envelope">The received SignalServiceEnvelope</param>
/// <returns>a decrypted SignalServiceContent</returns>
public SignalServiceContent Decrypt(SignalServiceEnvelope envelope)
{
try
{
SignalServiceContent content = new SignalServiceContent();
if (envelope.HasLegacyMessage())
{
DataMessage message = DataMessage.Parser.ParseFrom(Decrypt(envelope, envelope.GetLegacyMessage()));
content = new SignalServiceContent()
{
Message = CreateSignalServiceMessage(envelope, message)
};
}
else if (envelope.HasContent())
{
Content message = Content.Parser.ParseFrom(Decrypt(envelope, envelope.GetContent()));
if (message.DataMessageOneofCase == Content.DataMessageOneofOneofCase.DataMessage)
{
content = new SignalServiceContent()
{
Message = CreateSignalServiceMessage(envelope, message.DataMessage)
};
}
else if (message.SyncMessageOneofCase == Content.SyncMessageOneofOneofCase.SyncMessage && LocalAddress.E164number == envelope.GetSource())
{
content = new SignalServiceContent()
{
SynchronizeMessage = CreateSynchronizeMessage(envelope, message.SyncMessage)
};
}
else if (message.CallMessageOneofCase == Content.CallMessageOneofOneofCase.CallMessage)
{
content = new SignalServiceContent()
{
CallMessage = CreateCallMessage(message.CallMessage)
};
}
else if (message.ReceiptMessageOneofCase == Content.ReceiptMessageOneofOneofCase.ReceiptMessage)
{
content = new SignalServiceContent()
{
ReadMessage = CreateReceiptMessage(envelope, message.ReceiptMessage)
};
}
}
return(content);
}
catch (InvalidProtocolBufferException e)
{
throw new InvalidMessageException(e);
}
}