package com.project.common.utils.wx;
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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.BadPaddingException;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.NoSuchPaddingException;
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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.*;
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import java.security.spec.InvalidParameterSpecException;
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/**
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* @author zsc
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* @date 2020/07/17
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* AES-128-CBC 加密方式
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* AES-128-CBC可以自己定义“密钥”和“偏移量“。
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* AES-128是jdk自动生成的“密钥”。
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*/
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public class AESUtil {
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static {
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Security.addProvider(new BouncyCastleProvider());
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}
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/**
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* AES解密
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* @param data 密文,被加密的数据
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* @param key 秘钥
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* @param iv 偏移量
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* @param encodingFormat 解密后的结果需要进行的编码
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* @return
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* @throws Exception
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*/
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public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
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//被加密的数据
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byte[] dataByte = Base64.decodeBase64(data);
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//加密秘钥
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byte[] keyByte = Base64.decodeBase64(key);
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//偏移量
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byte[] ivByte = Base64.decodeBase64(iv);
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try {
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Security.addProvider(new BouncyCastleProvider());
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
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SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
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AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
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parameters.init(new IvParameterSpec(ivByte));
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cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
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byte[] resultByte = cipher.doFinal(dataByte);
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if (null != resultByte && resultByte.length > 0) {
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String result = new String(resultByte, encodingFormat);
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return result;
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}
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return null;
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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} catch (NoSuchPaddingException e) {
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e.printStackTrace();
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} catch (InvalidParameterSpecException e) {
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e.printStackTrace();
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} catch (InvalidKeyException e) {
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e.printStackTrace();
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} catch (InvalidAlgorithmParameterException e) {
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e.printStackTrace();
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} catch (IllegalBlockSizeException e) {
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e.printStackTrace();
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} catch (BadPaddingException e) {
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e.printStackTrace();
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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