I know I'm not doing something right but I can't seem to find any example code that will show me how to properly initialize the AES class. Below is a snippet that I ripped from test.cpp and attempted to mangle it to what I need to do. Can someone please tell me what I'm missing / doing wrong?
 
void AES_test(byte *&text, int itsize)
{
 const byte key[] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
 const byte iv[] = {0x12,0x34,0x56,0x78,0x90,0xab,0xcd,0xef,0x12,0x34,0x56,0x78,0x90,0xab,0xcd,0xef};
 byte *ciphertext = new byte[itsize];
 CFB_Mode<AES>::Encryption encryption_AES_CBC;
 encryption_AES_CBC.SetKeyWithIV(key, 16, iv);
 encryption_AES_CBC.ProcessString(ciphertext, text, itsize);
 byte *decrypted = new byte[itsize];
 CFB_Mode<AES>::Decryption decryption_AES_CBC;
 decryption_AES_CBC.ProcessString(decrypted, ciphertext, itsize);
}
 
 I can get the encryption function to work (I think because during debug VC6 is spitting out my encrypted result) - but if I call the decryption, I get an unhandled exception 0xc0000005 - In the debugger it points to the CFB_DecryptionTemplate<BASE>::CombineMessageAndShiftRegister(byte *output, byte *reg, const byte *message, unsigned int length) function in strciphr.cpp.
 
Can someone give me a pointer please? Or at least point me to some example AES code that someone wrote using crypto++?
 
Thanks in advance,
 
Anthony

Reply via email to