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2022-12-27
Java对称加密算法DES实例详解
本文实例讲述了java对称加密算法DES。分享给大家供大家参考,具体如下:
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 sechttp://retKey = 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
PS:关于加密解密感兴趣的朋友还可以参考本站在线工具:
文字在线加密解密工具(包含AES、DES、RC4等):
http://tools.jb51.net/password/txt_encode
MD5在线加密工具:
http://tools.jb51.net/password/CreateMD5Password
在线散列/哈希算法加密工具:
http://tools.jb51.net/password/hash_encrypt
在线MD5/hash/SHA-1/SHA-2/SHA-256/SHA-512/SHA-3/RIPEMD-160加密工具:
http://tools.jb51.net/password/hash_md5_sha
在线sha1/sha224/sha256/sha384/sha512加密工具:
http://tools.jb51.net/password/sha_encode
更多关于java相关内容感兴趣的读者可查看本站专题:《Java数学运算技巧总结》、《Java数据结构与算法教程》、《Java字符与字符串操作技巧总结》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
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