Java後臺 微信小程序解密獲取openid 過程 AES解密錯誤,報錯java.security.NoSuchAlgorithmException:Cannot find any provider supporting AES/CBC/PKCS7Padding, 這是因爲jdk不支持PKCS7Padding 的填充方式, 將AES/CBC/PKCS7Padding改成PKCS5Padding試試,這兩種填充方式區別不大,測試是可以的。
package com.szwisdom.fmp.app.server.common.util;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.*;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
public class AesCbcUtil {
static {
//BouncyCastle是一個開源的加解密解決方案,主頁在http://www.bouncycastle.org/
Security.addProvider(new BouncyCastleProvider());
}
/**
* AES解密
*
* @param data //密文
* @param key //祕鑰
* @param iv //偏移量
* @param encodingFormat //編碼(UTF-8)
* @return
* @throws Exception
*/
public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
//被加密的數據
byte[] dataByte = Base64.decodeBase64(data.getBytes());
//加密祕鑰
byte[] keyByte = Base64.decodeBase64(key.getBytes());
//偏移量
byte[] ivByte = Base64.decodeBase64(iv.getBytes());
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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, encodingFormat);
return result;
}
return null;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}