Chiper, Java - rextester

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import java.io.*;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

class Rextester
{  
    private static final String ENCRYPTION = "PBEWithMD5AndDES";	
	private static final String SALT = "07162534";
	private static final int COUNT = 20;
	
	public static String encrypt(String pass, String val) {
		try {
            byte[] ciphertext;
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ENCRYPTION);
			PBEKeySpec keySpec = new PBEKeySpec(pass.toCharArray());
			SecretKey key = keyFactory.generateSecret(keySpec);
			PBEParameterSpec paramSpec = new PBEParameterSpec(SALT.getBytes(), COUNT);
			Cipher cipher = Cipher.getInstance(ENCRYPTION);
			cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
			ciphertext = cipher.doFinal(val.getBytes());
            return toHexString(ciphertext);
		} catch (Exception e) {
			e.printStackTrace();
		}
        
		return null;
	}
    
	public static String decrypt(String pass, String val) {
		try {
            byte[] decryptedtext;
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ENCRYPTION);
			PBEKeySpec keySpec = new PBEKeySpec(pass.toCharArray());
			SecretKey key = keyFactory.generateSecret(keySpec);
			PBEParameterSpec paramSpec = new PBEParameterSpec(SALT.getBytes(), COUNT);
			Cipher cipher = Cipher.getInstance(ENCRYPTION);
			cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
			decryptedtext = cipher.doFinal(toByteArray(val));
            return new String(decryptedtext);
		} catch (Exception e) {
			e.printStackTrace();
		}
        
		return null;
	}

private static String toHexString(byte[] in) {
		byte ch = 0x00;
		int i = 0;
		if (in == null || in.length <= 0) {
			return null;
		}

String pseudo[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
				"A", "B", "C", "D", "E", "F" };

StringBuffer out = new StringBuffer(in.length * 2);
		while (i < in.length) {
			ch = (byte) (in[i] & 0xF0);
			ch = (byte) (ch >>> 4);
			ch = (byte) (ch & 0x0F);
			out.append(pseudo[(int) ch]);
			ch = (byte) (in[i] & 0x0F);
			out.append(pseudo[(int) ch]);
			i++;
		}

String rslt = new String(out);
		return rslt;
	}

private static byte[] toByteArray(String hexstring) throws Exception {
		byte[] result = null;
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		char[] charArray = hexstring.toCharArray();

for (int i=0; i<charArray.length; i+=2) {
			baos.write(new byte[]{ Integer.decode("0x"+charArray[i]+charArray[i+1]).byteValue() });
		}

result = baos.toByteArray();
		baos.close();
		return result;
	}
    
    
    public static void main(String args[])
    {
        try { 
         BufferedReader reader =  
                   new BufferedReader(new InputStreamReader(System.in)); 
        String pass = reader.readLine(); 
        System.out.println( Rextester.encrypt(pass, "mypass") );
        System.out.println( Rextester.decrypt(pass, "3C884B1D9B026565") );
        } catch (Exception e) {
			e.printStackTrace();
		}            
    }
}

[ + ] Show input
Compilation time: 0.73 sec, absolute running time: 0.58 sec, cpu time: 1.13 sec, memory peak: 41 Mb, absolute service time: 1,32 sec