Is there a BER Encoder/Decoder library I can use in my Qt C++ project?

Is there a good C++ library I can use for doing BER encoding/decoding? This exists for C++.NET: http://msdn.microsoft.com/en-us/library/system.directoryservices.protocols.berconverter.encode.aspx?cs-save-lang=1&cs-lang=cpp#code-snippet-1 Is there something similar I can use in a C++ Qt project? I would like my application to be as flexible as a BER file editor. I am not looking for a code generator based on a fixed ASN1 definition.