微信小程序解密算法
<h5>示例：</h5>
<h6>依赖：</h6>
<pre><code><dependency>
<groupId>org.codehaus.xfire</groupId>
<artifactId>xfire-core</artifactId>
<version>1.2.6</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk16</artifactId>
<version>1.46</version>
</dependency></code></pre>
<pre><code>package com.syhd.user.test;
import com.alibaba.fastjson.JSONObject;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Base64;
import com.alibaba.fastjson.JSONObject;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.InvalidParameterSpecException;
/**
* TODO
*
* @author jxd
* @version 1.0 *
* @date 2020/11/16 17:27
*/
public class EE {
public static void main(String[] args) {
String data = "DgqgK0AdzLE5YZ5mgbX5/8JoTZzotocrf64pLlaogtUO89ZlCAePEMmgTX7iRxQ7E4lDYXyR4o6AQqjCt2NhHwk84SzGA8ENaIbRmCgHaziE7zFQjJfZn+Hu0e0AJusA1RKmsyu9Ss3dSuE2GtgeHNNKYX3sQ/j59V7jcuzEVP4A4n0kiMTa4ZSA5UqAlxd50OkXtuJ+5oMfbrhhYy8aIfiA7oE/XNHy9ZMMxfHrqSCM+3ysHN3vo6O4FeL/4esU6J1EtMJU+xsACbjwy3IO0+ONKCTBjy45N18uGpqqNnbytJFEzqwQTl9p95kQdHTNkBvZpMb+9xYfJa9ZoT9uwetZseJokRPWhV1CSodh8XL251UcTmMt4sTy/eXICf3Ugw/0jaK/wgC2rCBitQT1S9fNwS11Xi8jijxXAsYRPuPYLVl8tj0GEEmXr/ZoOI01T7+vuvD8Be6t63ssQ07mIC3vZhui1sYntqM7nqm1DTI=";
String iv = "QazBj4L+LoLRUWf15QXgJw==";
String sessionKey = "/V+4egK6u7htUvbBV0o7Rw==";
JSONObject sss = getUserInfo(data, sessionKey, iv);
System.out.println(sss.toJSONString());
}
/**
* 获取信息
*/
public static JSONObject getUserInfo(String encryptedData, String sessionkey, String iv) {
// 被加密的数据
byte[] dataByte = Base64.decode(encryptedData);
// 加密秘钥
byte[] keyByte = Base64.decode(sessionkey);
// 偏移量
byte[] ivByte = Base64.decode(iv);
try {
// 如果密钥不足16位，那么就补足. 这个if 中的内容很重要
int base = 16;
if (keyByte.length % base != 0) {
int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
keyByte = temp;
}
// 初始化
Security.addProvider(new BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
parameters.init(new IvParameterSpec(ivByte));
cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
byte[] resultByte = cipher.doFinal(dataByte);
if (null != resultByte && resultByte.length > 0) {
String result = new String(resultByte, "UTF-8");
return JSONObject.parseObject(result);
}
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidParameterSpecException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (InvalidAlgorithmParameterException e) {
e.printStackTrace();
} catch (NoSuchProviderException e) {
e.printStackTrace();
}
return null;
}
}
</code></pre>