Using example from Java Secuirty, get Exception
using the following example from professional Java Security to test my installation of jce and bouncycastle.
<code>
import java.security.*;
import javax.crypto.*;
/**
*SimpleExample.java
*
*This class creates a TripleDES key, encrypts some text,
*prints the ciphertext, then decrypts the text and
*prints that.
*
*It requires a JCE-compliant TripleDES engine, like Cryptix' JCE.
*/
public class SimpleExample
{
public static void main (String[] args)
throws Exception
{
if (args.length != 1) {
System.err.println("Usage: java SimpleExample text");
System.exit(1);
}
String text = args[0];
System.out.println("Generating a TripleDES key...");
// Create a TripleDES key
KeyGenerator keyGenerator = KeyGenerator.getInstance("TripleDES");
keyGenerator.init(168);// need to initialize with the keysize
Key key = keyGenerator.generateKey();
System.out.println("Done generating the key.");
// Create a cipher using that key to initialize it
Cipher cipher = Cipher.getInstance("TripleDES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plaintext = text.getBytes("UTF8");
// Print out the bytes of the plaintext
System.out.println("\nPlaintext: ");
for (int i=0;i<plaintext.length;i++) {
System.out.print(plaintext+" ");
}
// Perform the actual encryption
byte[] ciphertext = cipher.doFinal(plaintext);
// Print out the ciphertext
System.out.println("\n\nCiphertext: ");
for (int i=0;i<ciphertext.length;i++) {
System.out.print(ciphertext+" ");
}
// Re-initialize the cipher to decrypt mode
cipher.init(Cipher.DECRYPT_MODE, key);
// Perform the decryption
byte[] decryptedText = cipher.doFinal(ciphertext);
String output = new String(decryptedText,"UTF8");
System.out.println("\n\nDecrypted text: "+output);
}
}
></code>
it compiles fine but at runtime i get the folowing exception:
Exception in thread "main" java.lang.SecurityException: Unsupported keysize or algorithm parameters
at javax.crypto.Cipher.init(DashoA6275)
at SimpleExample.main(SimpleExample.java:35)
Anyone have any ideas about this.
running jdk 1.4 beta 3, jce packaged with it
(UK resident)
Thanks for any assistance
gandalfgrey
