package com.ruoyi.user.vx.utils;
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import org.apache.commons.codec.binary.Base64;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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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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import java.io.UnsupportedEncodingException;
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import java.security.Key;
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import java.security.Security;
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import java.util.Arrays;
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/**
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* 微信通讯加解密类
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*
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* @author HJL
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*/
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public class WxAesUtils {
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public static void main(String[] args) {
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String s = decryptData("bmdheU9pKVKVyJOH8CR3mqp4mEeKZ1YOuMsVxXJKjRdc47rolEoe85JKAVEWmP2hl4NZB66qxN/NHHGsy0PqCn7hS4cLKqTgERXcYO0dURt2JuLg1myhG+PYhi0AROwfJytGBv77u8yinmMfyyKx6lSegkqnlIJ6TBIDYe2LCvW3kRVDzNDeWT0hOaLiRI6n3TFQwI0b5Tiu48UbFTHDhAtJ6LaZY+wg+PdtrHDgjWtt46pinENV22GFt77a6iIhdT4GzaW7ln45HuENtzXJLR5yM7SwT2pxKMGEknJGJD3yf/DxnR6a8HpXrwxtXHJfDlUzNS+Af51fOS/Z52LpbtvRecoEz8KKUxJ9lpcK1HrO/RMw/iYf+ce1bu5VIpYyMjTNAoLdffZ7V0HGMrVJUGbQMqk7ZjdCk1eqMyPpuIOuektgKE7K5wHqeo3NVo7A",
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"6pOQ1+4ca2ATDaSg4gauVA==",
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"zzmYGLoLH548Vf0fdJHHvA==");
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System.out.println(s);
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}
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public static String decryptData(String encryptDataB64, String sessionKeyB64, String ivB64) {
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String data = null;
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try {
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data = new String(
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decryptOfDiyIv(
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Base64.decodeBase64(encryptDataB64),
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Base64.decodeBase64(sessionKeyB64),
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Base64.decodeBase64(ivB64)
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)
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);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return data;
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}
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private static final String KEY_ALGORITHM = "AES";
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private static final String ALGORITHM_STR = "AES/CBC/PKCS7Padding";
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private static Key key;
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private static Cipher cipher;
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private static void init(byte[] keyBytes) {
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// 如果密钥不足16位，那么就补足. 这个if 中的内容很重要
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int base = 16;
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if (keyBytes.length % base != 0) {
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int groups = keyBytes.length / base + (keyBytes.length % base != 0 ? 1 : 0);
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byte[] temp = new byte[groups * base];
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Arrays.fill(temp, (byte) 0);
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System.arraycopy(keyBytes, 0, temp, 0, keyBytes.length);
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keyBytes = temp;
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}
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// 初始化
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Security.addProvider(new BouncyCastleProvider());
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// 转化成JAVA的密钥格式
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key = new SecretKeySpec(keyBytes, KEY_ALGORITHM);
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try {
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// 初始化cipher
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cipher = Cipher.getInstance(ALGORITHM_STR, "BC");
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* 解密方法
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*
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* @param encryptedData 要解密的字符串
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* @param keyBytes 解密密钥
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* @param ivs 自定义对称解密算法初始向量 iv
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* @return 解密后的字节数组
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*/
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private static byte[] decryptOfDiyIv(byte[] encryptedData, byte[] keyBytes, byte[] ivs) {
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byte[] encryptedText = null;
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init(keyBytes);
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try {
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cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(ivs));
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encryptedText = cipher.doFinal(encryptedData);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return encryptedText;
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}
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/**
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* 解码
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*
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* @param str 加密敏感数据
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* @return 解码结果
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*/
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public static String getUrlDecoderString(String str) {
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String result = "";
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if (null == str) {
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return "";
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}
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try {
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result = java.net.URLDecoder.decode(str, "GBK");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return result;
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}
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}
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