对称加密代码

package com.pxd.security; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; 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 org.apache.commons.codec.binary.Hex; import org.bouncycastle.jce.provider.BouncyCastleProvider; /** step 1 * DES两种实现 jdk 和 bc * @author 35-pxiaodong * */ public class MfzDES { private static String src="com.pxd.security"; public static void main(String[] args) { jdkDES(); bcDES(); } public static void jdkDES(){ try { //生成key KeyGenerator keyGenerator = KeyGenerator.getInstance("DES"); keyGenerator.init(56); SecretKey secretKey=keyGenerator.generateKey(); byte [] key = secretKey.getEncoded(); //key转换 DESKeySpec desKeySpec = new DESKeySpec(key); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); SecretKey convertSecretKey = factory.generateSecret(desKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte [] result = cipher.doFinal(src.getBytes()); System.out.println("jdk des encrypt::"+Hex.encodeHexString(result)); //解密 cipher.init(Cipher.DECRYPT_MODE, convertSecretKey); result = cipher.doFinal(result); System.out.println("jdk DES decrypt::"+new String(result)); } catch (Exception e) { e.printStackTrace(); } } public static void bcDES(){ try { Security.addProvider(new BouncyCastleProvider()); //生成key KeyGenerator keyGenerator = KeyGenerator.getInstance("DES","BC"); keyGenerator.getProvider();//SunJCE keyGenerator.init(56); SecretKey secretKey=keyGenerator.generateKey(); byte [] key = secretKey.getEncoded(); //key转换 DESKeySpec desKeySpec = new DESKeySpec(key); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); SecretKey convertSecretKey = factory.generateSecret(desKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte [] result = cipher.doFinal(src.getBytes()); System.out.println("bc des encrypt::"+Hex.encodeHexString(result)); //解密 cipher.init(Cipher.DECRYPT_MODE, convertSecretKey); result = cipher.doFinal(result); System.out.println("bc DES decrypt::"+new String(result)); } catch (Exception e) { e.printStackTrace(); } } }