Triple DES Perl to Java

Alex <>
Wed, 23 Aug 2006 09:12:11 +0200

I am having a base64 encoded data block, which has been triple des
encrypted with Perl's Crypt::TripleDES class
( and
am trying to decrypt it with Java.

My problem is now that whatever I already tried I always get some
exception with messages from a wrong padding to nonexistent algorithms.
Below is some sample code with "O2OsvkIsfY0=" as base64 encoded data
block (decoded "data") and "key" as encryption key.

   import javax.crypto.*;
   import javax.crypto.spec.*;
   import sun.misc.BASE64Decoder;

   public class Test
       public static void main(String args[]) throws Exception
           String data="O2OsvkIsfY0=";
           String key="key";

           // PBE parameter specification with random values for salt
           // and iteration
           PBEParameterSpec pbeParamSpec = new PBEParameterSpec(new
byte[]{5, 10, 20, 30, 10, 85, 86, 3}, 20);

           byte b_data[]=new BASE64Decoder().decodeBuffer(data);

           PBEKeySpec keyspec=new PBEKeySpec(key.toCharArray());
           SecretKey sk=skf.generateSecret(keyspec);

           Cipher cipher=Cipher.getInstance("PBEWITHSHA1ANDDESEDE");
           cipher.init(Cipher.DECRYPT_MODE, sk, pbeParamSpec);

I hope that someone can shed a bit light into this, as I am really lost.

On a related note, I noticed that SecretKeyFactory.generateSecret()
throws an InvalidKeySpecException "Password is not ASCII" exception when
the key contains a ? symbol. Does this mean the Java implementation cant
handle such characters within the key?

Thanks very much,

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