package com.xcong.excoin.utils;
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import java.security.Key;
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import javax.crypto.Cipher;
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import javax.crypto.KeyGenerator;
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import javax.crypto.SecretKey;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.DESKeySpec;
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public class DES {
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static String string = "DES";
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public static void main(String[] args) {
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DES.jdkDES();
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}
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public static void jdkDES() {
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try {
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// 生成key//返回生成指定算法密钥的KeyGenerator对象
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KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
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keyGenerator.init(56);//初始化此密钥生成器,使其具有确定的密钥大小
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SecretKey secretKey = keyGenerator.generateKey();//生成一个密钥
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byte[] bs = secretKey.getEncoded();
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// key转换
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DESKeySpec desKeySpec = new DESKeySpec(bs); //实例化DES密钥规则
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SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); //实例化密钥工厂
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Key convertSecretKey = factory.generateSecret(desKeySpec); //生成密钥
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// 加密
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Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey);
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byte[] result = cipher.doFinal(string.getBytes());
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System.out.println("jdk des encrypt:" + DESUtil.byteToHex(result));
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// 解密
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cipher.init(Cipher.DECRYPT_MODE, convertSecretKey);
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result = cipher.doFinal(result);
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System.out.println("jdk des decrypt:" + new String(result));
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} catch (Exception e) {
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// TODO: handle exception
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e.printStackTrace();
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}
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}
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}
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