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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
关于Java中怎么使用DES对称加密算法问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注创新互联行业资讯频道了解更多相关知识。
