Java AES/ECB/PKCS5Padding to Match Chilkat and NIST Test Vectors

Here’s a quick sample showing how to AES encrypt in pure Java to match the NIST known answer test for ECB. The equivalent code using Chilkat is shown. The Chilkat API is consistent across ASP, VB6, C#, C++, Delphi, FoxPro, Ruby, Perl, Python, Java, etc. and produces the same results. Here is an online example: AES ECB Demo

	
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;
	
import com.chilkatsoft.CkCrypt2;
import com.chilkatsoft.CkByteData;
import com.chilkatsoft.CkString;
	
class AesMatchJce
{
  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }
	
 	public static String toHex (byte buf[]) {
	
      StringBuffer strbuf = new StringBuffer(buf.length * 2);
      int i;
	
      for (i = 0; i < buf.length; i++) {
       if (((int) buf[i] & 0xff) < 0x10)
	    strbuf.append("0");
	
       strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
      }
	
      return strbuf.toString();
     }
	
	public static void main(String args[]) throws Exception
	{
        // In Java, bytes are signed and range from -128 to 127
        // A value of -128 = 0x80.
        byte[] raw = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
	
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
	
        byte[] inBytes = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
		byte[] encrypted = cipher.doFinal(inBytes);
	
     	System.out.println("Java:");
        System.out.println(toHex(encrypted));
	
	// --------------------------------------------
   	// Now do the same with Chilkat
	// --------------------------------------------
	
    CkCrypt2 crypt = new CkCrypt2();
    crypt.UnlockComponent("Anything for 30-day trial.");
	
	crypt.put_CryptAlgorithm("aes");
	crypt.put_CipherMode("ecb");
	crypt.put_KeyLength(128);
	crypt.put_EncodingMode("hex");
	crypt.put_Charset("windows-1252");
	
	crypt.SetEncodedKey("80000000000000000000000000000000","hex");
	
	CkByteData inData = new CkByteData();
	inData.appendEncoded("00000000000000000000000000000000","hex");
	
	CkString encryptedStr = new CkString();
	crypt.EncryptBytesENC(inData,encryptedStr);
	
	// The result is correct: 0EDD33D3C621E546455BD8BA1418BEC8...
	// This is the result as specified by the NIST test vector...
	System.out.println("Chilkat:");
	System.out.println(encryptedStr.getString());
	
	}
	
}