Invalid key length: exception

[Rubal Sidhu]

Hi,
I will really appreciate if someone can help me on this.
I created a keystore using below tool

keytool -genkey -v -alias myAlias -keyalg DSA -keystore myKey.keystore -storetype JCEKS -provider com.sun.crypto.provider.SunJCE

I am using following code to encrypt the data.

Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding",provider.getName());
Key key = store.getKey(myAlias, myPassword);
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypted = cipher.doFinal(data);

But I get following error everytime,

java.security.InvalidKeyException: Invalid key length: 335 bytes
at com.sun.crypto.provider.DESedeCipher.engineGetKeySize(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)

I will appreciate if who can advice me on this issue.

Thanks,
Rouble

[James Sabre]

You are generating a DSA key and then trying to use it for DES encryption.

What are you trying to do?

[Henry Wong]

Moving this to the security forum...

Henry

[Rubal Sidhu]

Hello,I am new to Security & I think I am not generating keystore correctly.Can you tell me how to generate correct keystore for my code to work.
Thanks,
Rouble

[James Sabre]

Originally posted by Rubal Sidhu:
Hello,I am new to Security & I think I am not generating keystore correctly.Can you tell me how to generate correct keystore for my code to work.
Thanks,
Rouble

Until you say what you are trying to do it is difficult so say what is wrong. In your original code you were creating a key that is normally used for digital signatures and then trying to use it for DES encryption.

So, again, what are you trying to do?

[Rubal Sidhu]

Hi James,
Sorry for not clarifying this in previous reply.Anyway the problem is solved.You were right I was using keytool to create key in keystore.I created the key using below code & it worked.

Thanks for your help & patience.
Rouble

String provider ="com.sun.crypto.provider.SunJCE";
KeyGenerator generator = KeyGenerator.getInstance("DESede", provider);
SecretKey key = generator.generateKey();
KeyStore keystore=KeyStore.getInstance("JCEKS", provider);
keyStore.setKeyEntry("myAlias", key, "myPassword", null);
File keyStoreFile = new File(c:\\test.keystore");
FileOutputStream fos = new FileOutputStream(keyStoreFile);
keyStore.store(fos, "myStorePassword");

[ August 09, 2006: Message edited by: Rubal Sidhu ]
[ August 09, 2006: Message edited by: Rubal Sidhu ]