public static Keys Decode(Stream inStream)
{
int length;
using (BinReader r = new BinReader(inStream))
{
length = r.ReadInt32();
}
if (length == 0)
return EmptyKeys;
try
{
Keys keys = new Keys();
for (; length > 0; length--)
{
using (BinReader r = new BinReader(inStream))
{
KeyScheme scheme = KeyScheme.SchemeFor(r.ReadInt32());
int keySetCount = r.ReadInt32();
if (scheme.IsDual())
{
if (keySetCount != 2)
throw new ProtocolCodecException("Dual key scheme with " + keySetCount + " key sets");
DualKeySet keyset = keys.NewKeysetFor((DualKeyScheme)scheme);
DecodeKeys(inStream, keyset.ProducerKeys);
DecodeKeys(inStream, keyset.ConsumerKeys);
}
else
{
if (keySetCount != 1)
throw new ProtocolCodecException
("Single key scheme with " + keySetCount + " key sets");
DecodeKeys(inStream, keys.NewKeysetFor((SingleKeyScheme)scheme));
}
}
}
return keys;
}
catch (ArgumentException ex)
{
// most likely an invalid KeyScheme ID
throw new ProtocolCodecException("Could not decode keys.", ex);
}
}
