C++/Java AES Encryption: CFB IV key issues?

Related Question Here: http://www.experts-exchange.com/Programming/Languages/Java/Q_24644152.html

I have finished with Java and C++ encryption using ECB, one of the more simple encryptions of AES.

However, CBC and CFB require a IvParameterSpec/Chain to function properly.

I am not sure how to go about this, for C++, I've done, when making the key:

      oRijndael.MakeKey("abcdefghabcdefgh", CRijndael::sm_chain0, 16, 16);

   sm_chain0 being a simple: \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 for use.  I also have to reset the chain using     oRijndael.ResetChain(); every time I need to encrypt/decrypt.


C++ sample:"
      CRijndael oRijndael;
      oRijndael.MakeKey("abcdefghabcdefgh", CRijndael::sm_chain0, 16, 16);
      char szDataIn_Orig[] = "aaaaaaaaaaaaaaaa";

        //Test ECB
      int nLen = strlen(szDataIn_Orig);
      char *szDataIn = new char[nLen + 1];
      memset((char *)szDataIn, 0, nLen + 1);
      strcpy(szDataIn, szDataIn_Orig);

      // To encrypt
      char szDataOut[17] ="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
    oRijndael.ResetChain();
      oRijndael.Encrypt(szDataIn, szDataOut, nLen, CRijndael::CFB);

      std::string encoded = base64_encode(reinterpret_cast<const unsigned char*>(szDataOut), nLen);
"


java sample:

import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.*;
import java.io.*;
import java.util.prefs.*;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

class test2 {

public static void main(String[] args) throws Exception {


String plaintext = "abcdefghabcdefgh";
String key = "abcdefghabcdefgh";

            byte iv[16];

for (int i =0;i<iv.length;i++)
{
iv[i]=0;
}

IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");


Cipher cipher = Cipher.getInstance("AES/CFB/NoPadding");
      cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivParameterSpec);
byte[] encrypted = cipher.doFinal(plaintext.getBytes());
String st = new String(encrypted);
System.out.println("Ostermiller Encrypted 64: " + encrypted);

BASE64Encoder base64 = new BASE64Encoder();
String encodedString = base64.encodeBuffer(encrypted);
System.out.println("Ostermiller Encrypted 64: " + encodedString);


         }
    }


Would be example coding for the encoded. Using  CRijndael::ECB for C++ and AES/ECB/NoPadding for java works great. However, swappingt o CFB or CBC that eneds the IV key does not work well.

Any suggestions on how I can get the 'keys' synced up? I am maybe thinking the java side key isn't working properly, as I'm not to well (just started a couple days ago) with java.

The general attached files like before are still at http://stellarfrontier.net/encrypt.zip (Contains 4 files for C++)