Stuck loading Private Key from Byte Array
TkD08
Hi all,
So I've looked around enough, and it seems others have had almost the same
issue, but has been solved differently.
Anyway on to what I'm trying to accomplish: I have a private key being sent
over a socket by a Java Server to decrypt a string, and a Qt/C++ client that
is trying to accept this key. While I was able to do so by sending the key
to a file first, and loading it as such:
CryptoPP::RSA::PrivateKey privKey;
CryptoPP::ByteQueue queue;
CryptoPP::FileSource file(filename.c_str(), true /*pumpAll*/);
file.TransferTo(queue);
queue.MessageEnd();
privKey.Load(queue);
I was not able to reproduce the same results using a byte array, I've tried
a couple ways:
//----------------------------- 1) -----------------------------------
QByteArray keyData = keySocket.readAll(); // reads all available data from
the socket (double checked)
char *data = keyData.data(); // returns a pointer to a '/0' terminated
string
CryptoPP::ByteQueue queue;
CryptoPP::StringSource keySource(data, true);
keySource.TransferTo(queue);
queue.MessageEnd();
privKey.Load(queue);
//------------------------------- 2) ----------------------------------
QByteArray keyData = keySocket.readAll(); // reads all available data from
the socket (double checked)
std::string dataString = QString(keyData).toStdString(); // creates a std
string from the byte array
CryptoPP::StringSource keySource(dataString, true);
privKey.Load(keySource);
Both times I end up with a "BER decode error" exception when trying to load
the key.
Am I just doing this completely wrong? I know there must be something
missing, but I've been going crazy trying so many ways!
Please help! It would be much appreciated!
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TkD08
Got a response, thought I'd post it here for everyone else!
privKey.Load(CryptoPP::StringStore((const
byte*)data,(size_t)dataLen).Ref());
That's it, that's all!
data is a char * containing the bytes of the key, and dataLen as you can
probably guess is a const int with the length of data!
Thanks Da Co!
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