How to encrypt data in Java using DES and decrypt that data into Object-c

Question

here is my java code use des

public class DES {

    public static String encode(String str, String key) throws Exception {
        byte[] rawKey=Base64.decode(key);
        IvParameterSpec sr=new IvParameterSpec(rawKey);
        DESKeySpec dks=new DESKeySpec(rawKey);
        SecretKeyFactory keyFactory=SecretKeyFactory.getInstance("DES");
        SecretKey secretKey=keyFactory.generateSecret(dks);

        javax.crypto.Cipher cipher=Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);

        byte data[]=str.getBytes("UTF8");
        byte encryptedData[]=cipher.doFinal(data);
        return Base64.encode(encryptedData).trim();
    }

    public static String decode(String str, String key) throws Exception {
        byte[] rawKey=Base64.decode(key);
        IvParameterSpec sr=new IvParameterSpec(rawKey);
        DESKeySpec dks=new DESKeySpec(rawKey);
        SecretKeyFactory keyFactory=SecretKeyFactory.getInstance("DES");
        SecretKey secretKey=keyFactory.generateSecret(dks);
        Cipher cipher=Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);
        byte encryptedData[]=Base64.decode(str);
        byte decryptedData[]=cipher.doFinal(encryptedData);
        return new String(decryptedData, "UTF8").trim();
    }
}

I'am a new of objective-c and have some trouble in Ojbective-c DES, Above code is use java, I want to encrypt or decrypt a string finally get the same result in Object-c.

if Java and Objective-C are your interest, then why annoy the C++, C and IPhone tags? — Sebastian Mach, Jul 10 '12 at 10:35
But you are looking for an Objective-C answer. And what about the C++ tag? And apart from this: What exactly are you having problems with? — Sebastian Mach, Jul 10 '12 at 10:43
And it would be nice if you could make your post easier to read (read the help on formatting). — Sebastian Mach, Jul 10 '12 at 10:48
@Sunxc, this will help you out hopefully http://stackoverflow.com/questions/4611256/is-there-any-api-that-could-use-to-call-the-des-encrypt-and-decrypt-in-objective — TeaCupApp, Jul 10 '12 at 10:52
@Sunxc, Look at my [question](http://stackoverflow.com/questions/10631076/how-to-encrypt-the-nsstring-value-using-des-in-iphone). It will helps you. — bharath, Jul 10 '12 at 11:10

score 0 · Answer 1 · edited May 23 '17 at 12:04

0

The CommonCrypto library (which is in C, so can be used from Objective-C, and is part of both Mac OS X and iOS) implements the DES algorithm. See, for example, this question: Encryption for Objective-C

edited May 23 '17 at 12:04

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answered Jul 10 '12 at 10:57

How to encrypt data in Java using DES and decrypt that data into Object-c

1 Answers1