Re: BERDecode throw (was: ... exporting public RSA key to std::string)

[Jeffrey Walton]

THIS WORKS. Any idea why? What is the negative interaction between the
HexDecoder and StringSource in the previous cases?

{ // BER Decode Private Key
  CryptoPP::HexDecoder decoder;
  decoder.Put( (byte*)prvkey.c_str(), prvkey.size() );
  decoder.MessageEnd();

  temp1.AccessKey().Load( decoder );

  std::cout << "Dumping Public Key..." << std::endl;
  DumpPublicKey( temp1 );
}

Jeff

Jeffrey Walton wrote:

Hi Wei,

Here are the details... b = '3': This is the first byte of the string or file.

// asn.cpp
void BERGeneralDecoder::Init(byte asnTag)
    byte b;
    if (!m_inQueue.Get(b) || b != asnTag)
       BERDecodeError(); <=== Blow Up, b = '3', asnTag = '0'

    if (!BERLengthDecode(m_inQueue, m_length, m_definiteLength))
       BERDecodeError();

m_length = 14757... (20 decimal digits)
m_definiteLength = true

m_length = 14757... (20 decimal digits)
m_definiteLength = true

Jeff

{ // Broke
   temp2.AccessKey().Load(
      CryptoPP::HexDecoder(
         new CryptoPP::StringSource( pubkey, true )
      )
   );
}

{ // Broke
   temp2.AccessKey().Load(
      CryptoPP::HexDecoder(
         new CryptoPP::FileSource( "rsa400pb.dat", true )
      )
   );
}

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