package com.kidgrow.common.utils;
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import org.apache.commons.codec.binary.Base64;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* @Author: dougang
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* @Description:
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* @Date: create in 2020/6/19 10:44
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*/
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public class AesUtils {
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/**
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* 十六位密钥
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*/
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private static final String KEY = "66XiGaoKeJi@COM6";
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/**
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* 十六位密钥偏移量
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*/
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private static final String IV = "123#XIGAO.com456";
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/**
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* 加密方法
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* @param data 要加密的数据
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* @param key 加密key
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* @param iv 加密iv
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* @return 加密的结果
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* @throws Exception
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*/
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public static String encrypt(String data, String key, String iv) throws Exception {
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
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int blockSize = cipher.getBlockSize();
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byte[] dataBytes = data.getBytes();
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int plaintextLength = dataBytes.length;
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if (plaintextLength % blockSize != 0) {
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plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
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}
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byte[] plaintext = new byte[plaintextLength];
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System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
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SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
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IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
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cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
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byte[] encrypted = cipher.doFinal(plaintext);
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return new Base64().encodeToString(encrypted);
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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/**
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* 解密方法
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* @param data 要解密的数据
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* @param key 解密key
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* @param iv 解密iv
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* @return 解密的结果
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* @throws Exception
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*/
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public static String desEncrypt(String data, String key, String iv) throws Exception {
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try {
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byte[] encrypted1 = new Base64().decode(data);
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Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
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SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
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IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
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cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
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byte[] original = cipher.doFinal(encrypted1);
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String originalString = new String(original);
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return originalString;
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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/**
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* 使用默认的key和iv加密
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* @param data
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* @return
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* @throws Exception
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*/
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public static String encrypt(String data) throws Exception {
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return encrypt(data, KEY, IV);
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}
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/**
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* 使用默认的key和iv解密
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* @param data
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* @return
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* @throws Exception
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*/
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public static String desEncrypt(String data) throws Exception {
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return desEncrypt(data, KEY, IV);
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}
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}
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