des.java Source code

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Here is the source code for des.java

Source

/*
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 */

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.Object;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
//import iaik.security.cipher.Twofish;

// KEY SPECIFICATIONS
import java.security.Provider;
import java.security.Security;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.CipherSpi;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import com.mongodb.BasicDBObject;
import com.mongodb.Block;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoDatabase;

import static com.mongodb.client.model.Filters.*;
import static com.mongodb.client.model.Sorts.ascending;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;
import javax.crypto.*;
import org.bson.Document;

/**
 *
 * @author funky
 */
public class des {
    public String encrypt(String str) {
        try {
            SecretKey key = KeyGenerator.getInstance("DES").generateKey();
            Cipher ecipher = Cipher.getInstance("DES");
            ecipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] utf8 = str.getBytes("UTF8");
            byte[] enc = ecipher.doFinal(utf8);
            String s = new sun.misc.BASE64Encoder().encode(enc);
            crypter.count++;
            DBObject en = new BasicDBObject("id", crypter.count).append("string", s);
            crypter.collection.insert(en);
            crypter.vecd.add(key);
            crypter.indexd.add(crypter.count);
            return s;
        } catch (BadPaddingException e) {
        } catch (IllegalBlockSizeException e) {
        } catch (UnsupportedEncodingException e) {
        } catch (NoSuchAlgorithmException e) {
        } catch (InvalidKeyException e) {
        } catch (NoSuchPaddingException e) {
        }
        return null;
    }

    public String decrypt(int i) throws InvalidKeyException, IOException {
        String str = null;
        SecretKey key = null;
        int j;
        int c = 0;
        for (j = 0; j < crypter.indexd.size(); j++) {
            if (crypter.indexd.get(j) == i) {
                c++;
                break;
            }
        }
        if (c == 0) {
            return new String("Wrong Algorithm chosen");
        }
        try {
            Cipher dcipher = Cipher.getInstance("DES");
            DBObject query = new BasicDBObject("id", i);
            DBCursor cursor = crypter.collection.find(query);
            str = (String) cursor.one().get("string");
            dcipher.init(Cipher.DECRYPT_MODE, crypter.vecd.get(j));
            byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
            byte[] utf8 = dcipher.doFinal(dec);
            return new String(utf8, "UTF8");
        } catch (BadPaddingException e) {
        } catch (IllegalBlockSizeException e) {
        } catch (UnsupportedEncodingException e) {
        } catch (NoSuchAlgorithmException e) {
        } catch (NoSuchPaddingException e) {
        }
        return null;
    }

}