Java中怎么使用DES对称加密算法
Java中怎么使用DES对称加密算法,针对这个问题,这篇文章详细介绍了相对应的分析和解答,希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
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一 DES算法概述
1、介绍
DES:Data Encryption Standard 数据加密标准。
2、DES算法参数
二 DES算法Java实现
package com.imooc.security.des; import java.security.Key; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; 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; public class ImoocDES { private static String src = "cakin24 security des"; 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[] bytesKey = secretKey.getEncoded(); //KEY转换 DESKeySpec desKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); Key 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(); keyGenerator.init(56); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY转换 DESKeySpec desKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); Key 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(); } } }
三 实现效果
jdk des encrypt : fce3e47941952379b860ca6dd00e0632b45e1edd02d4d843
jdk des decrypt : cakin24 security des
bc des encrypt : 13a41ff56157a7bb40b5ef77eca83bba9a444d1b5c89de11
bc des decrypt : cakin24 security des
四 DES算法应用场景
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文章题目:Java中怎么使用DES对称加密算法
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