package com.hdl.sdk.link.core.utils;
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import android.text.TextUtils;
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import com.hdl.sdk.link.common.utils.LogUtils;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.Key;
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import java.security.NoSuchAlgorithmException;
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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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/**
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* Aes 加解密工具类
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*
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* @author yangtao
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* 2020年10月29日
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*/
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public class AesUtil {
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private static final String CIPHER_INSTANCE = "AES/CBC/PKCS7Padding";
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private static final String AES_ALGORITHM = "AES";
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// static {
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// //AES/CBC/PKCS7Padding 依赖
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// Security.addProvider(new BouncyCastleProvider());
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// }
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/**
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* AES加密
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*
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* @param key
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* @return
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* @throws Exception
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*/
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public static byte[] aesEncrypt(byte[] content, String key) {
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return encrypt(content, key.getBytes(), CIPHER_INSTANCE, true, null);
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}
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/**
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* AES解密
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*
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* @param key
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* @return
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* @throws Exception
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*/
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public static byte[] aesDecrypt(byte[] content, String key) {
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if (TextUtils.isEmpty(key)) {
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LogUtils.i("数据解密失败，密钥为空");
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return null;
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}
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if (content==null) {
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LogUtils.i("数据解密失败，content为空");
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return null;
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}
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return decrypt(content, key.getBytes(), CIPHER_INSTANCE, true, null);
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}
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/**
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* 加密
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*
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* @param content 待加密字符串
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* @param keyByte aesKye的hexStr
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* @param cipherInstance AES算法填充方式
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* @param isIv 是否使用偏移量 ECB模式不可用
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* @param iv 偏移量 不传默认密钥
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* @return
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*/
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public static byte[] encrypt(byte[] content, byte[] keyByte, String cipherInstance, Boolean isIv, byte[] iv) {
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try {
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//KEY转换
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Key key = new SecretKeySpec(keyByte, AES_ALGORITHM);
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//加密
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Cipher cipher = Cipher.getInstance(cipherInstance);
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if (isIv != null && isIv) {
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//偏移量 不传默认密钥
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if (iv == null) {
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iv = keyByte;
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}
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IvParameterSpec ivps = new IvParameterSpec(iv);
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cipher.init(Cipher.ENCRYPT_MODE, key, ivps);
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} else {
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cipher.init(Cipher.ENCRYPT_MODE, key);
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}
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byte[] result = cipher.doFinal(content);
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return result;
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} catch (NoSuchAlgorithmException e) {
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LogUtils.e(e.getMessage());
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} catch (InvalidKeyException e) {
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LogUtils.e(e.getMessage());
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} catch (NoSuchPaddingException e) {
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LogUtils.e(e.getMessage());
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} catch (BadPaddingException e) {
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LogUtils.e(e.getMessage());
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} catch (IllegalBlockSizeException e) {
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LogUtils.e(e.getMessage());
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} catch (InvalidAlgorithmParameterException e) {
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LogUtils.e(e.getMessage());
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}
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return null;
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}
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/**
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* 解密
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*
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* @param contentByte 待解密待字符串hexStr
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* @param contentByte 密钥
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* @param cipherInstance AES算法填充方式
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* @param isIv 是否使用偏移量 ECB模式不可用
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* @param iv 偏移量 不传默认密钥
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* @return
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*/
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public static byte[] decrypt(byte[] contentByte, byte[] keyByte, String cipherInstance, Boolean isIv, byte[] iv) {
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try {
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//KEY转换
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Key key = new SecretKeySpec(keyByte, AES_ALGORITHM);
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//解密
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Cipher cipher = Cipher.getInstance(cipherInstance);
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if (isIv != null && isIv) {
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//偏移量 不传默认密钥
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if (iv == null) {
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iv = keyByte;
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}
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IvParameterSpec ivps = new IvParameterSpec(iv);
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cipher.init(Cipher.DECRYPT_MODE, key, ivps);
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} else {
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cipher.init(Cipher.DECRYPT_MODE, key);
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}
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byte[] result = cipher.doFinal(contentByte);
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return result;
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} catch (Exception e) {
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}
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return null;
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}
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}
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