The highlighted line causes a segmentation fault:

void DeriveKey(byte * key, wxString & password, byte * iv)
{
    /** Deriving a key from password **/
    //Convert password to UTF-32
    wxCharBuffer cbuff = password.mb_str(wxMBConvUTF32());
    //Assign UTF-32 data to a byte buffer
    byte * bpass = new byte[cbuff.length()];
    memcpy(bpass, (byte*)cbuff.data(), cbuff.length());
    //Derive the key
    PKCS5_PBKDF2_HMAC<CRC32> KeyDeriver;
    *KeyDeriver.DeriveKey(key, 16, (byte)0, bpass, cbuff.length(), iv, 16, 
1);*
}
What's wrong? Also, how do I use the "purpose" parameter (it is currently 
(byte)0 )?

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