對稱加密算法DES

DES對稱加密算法
需要的jar請見附件
①BouncyCastleProvider.jar
②commons-codec-1.10.jar

3重DES對稱加密

package encrypt;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.DESedeKeySpec;

import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.jce.provider.BouncyCastleProvider;


public class threeDES {
    
    private static String src = "今晚打老虎";
    public static void main(String[] args) {
        jdkthreeDES();
        bcThreeDES();
    }
    
    public static void jdkthreeDES(){
        //生成KEY
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede");
           /* keyGenerator.init(168);*///長度設置爲固定168
            keyGenerator.init(new SecureRandom());//生成默認長度
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] bytesKey = secretKey.getEncoded();
            
            
         //KEY轉換
            
                DESedeKeySpec desKeySpec = new DESedeKeySpec(bytesKey);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede");
                SecretKey conKey =  factory.generateSecret(desKeySpec);
                
         //加密
             Cipher cipher =  Cipher.getInstance("DESede/ECB/PKCS5Padding");
             cipher.init(Cipher.ENCRYPT_MODE, conKey);
             byte[]result = cipher.doFinal(src.getBytes());
             System.out.println("jdk des encrypt:" + Hex.encodeHexString(result));
             
         //解密
             cipher.init(Cipher.DECRYPT_MODE,conKey);
             result = cipher.doFinal(result);
             System.out.println("jdk 3des decrypt:" + new String(result));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
    }
    
    public static void bcThreeDES(){
        
        Security.addProvider(new BouncyCastleProvider());
        
        
        //生成KEY
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede","BC");
            /* keyGenerator.init(168);*///長度設置爲固定168
            keyGenerator.init(new SecureRandom());//生成默認長度
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] bytesKey = secretKey.getEncoded();
            
            
         //KEY轉換
            
            DESedeKeySpec desKeySpec = new DESedeKeySpec(bytesKey);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede");
                SecretKey conKey =  factory.generateSecret(desKeySpec);
                
         //加密
             Cipher cipher =  Cipher.getInstance("DESede/ECB/PKCS5Padding");
             cipher.init(Cipher.ENCRYPT_MODE, conKey);
             byte[]result = cipher.doFinal(src.getBytes());
             System.out.println("bc 3des encrypt:" + Hex.encodeHexString(result));
             
         //解密
             cipher.init(Cipher.DECRYPT_MODE,conKey);
             result = cipher.doFinal(result);
             System.out.println("bc 3des decrypt:" + new String(result));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        }
    }
}

DES對稱加密
package encrypt;
import java.io.ObjectInputStream.GetField;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.xml.bind.annotation.adapters.HexBinaryAdapter;

import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.jce.provider.BouncyCastleProvider;


public class jdkDES {
    
    private static String src = "今晚打老虎";
    public static void main(String[] args) {
        jdkDES();
        bcDES();
    }
    
    public static void jdkDES(){
        //生成KEY
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] bytesKey = secretKey.getEncoded();
            
            
         //KEY轉換
            
                DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
                SecretKey conKey =  factory.generateSecret(desKeySpec);
                
         //加密
             Cipher cipher =  Cipher.getInstance("DES/ECB/PKCS5Padding");
             cipher.init(Cipher.ENCRYPT_MODE, conKey);
             byte[]result = cipher.doFinal(src.getBytes());
             System.out.println("jdk des encrypt:" + Hex.encodeHexString(result));
             
         //解密
             cipher.init(Cipher.DECRYPT_MODE,conKey);
             result = cipher.doFinal(result);
             System.out.println("jdk des decrypt:" + new String(result));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
    }
    
    public static void bcDES(){
        
        Security.addProvider(new BouncyCastleProvider());
        
        
        //生成KEY
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede","BC");
            keyGenerator.getProvider();
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] bytesKey = secretKey.getEncoded();
            
            
         //KEY轉換
            
                DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede");
                SecretKey conKey =  factory.generateSecret(desKeySpec);
                
         //加密
             Cipher cipher =  Cipher.getInstance("DESede/ECB/PKCS5Padding");
             cipher.init(Cipher.ENCRYPT_MODE, conKey);
             byte[]result = cipher.doFinal(src.getBytes());
             System.out.println("bc des encrypt:" + Hex.encodeHexString(result));
             
         //解密
             cipher.init(Cipher.DECRYPT_MODE,conKey);
             result = cipher.doFinal(result);
             System.out.println("bc des decrypt:" + new String(result));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        }
    }
}
 

• BouncyCastleProvider.jar (1.6 MB)
• 下載次數: 3

• commons-codec-1.10.jar (277.5 KB)
• 下載次數: 3