import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
* <p>ClassName: AESUtil</p>
* <p>Description: AES 加密工具类</p>
* @Author bsq
* @Date: 2019年3月23日
*/
public class AESUtil {
private static final String KEY_ALGORITHM = "AES";
private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法
/**
* 原始加密
* @param clearTextBytes 明文字节数组,待加密的字节数组
* @param pwdBytes 加密密码字节数组
* @return 返回加密后的密文字节数组,加密错误返回null
*/
public static byte[] encrypt(byte[] clearTextBytes, byte[] pwdBytes) {
try {
// 1 获取加密密钥
SecretKeySpec keySpec = new SecretKeySpec(pwdBytes, KEY_ALGORITHM);
// 2 获取Cipher实例
Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
// 查看数据块位数 默认为16(byte) * 8 =128 bit
// System.out.println("数据块位数(byte):" + cipher.getBlockSize());
// 3 初始化Cipher实例。设置执行模式以及加密密钥
cipher.init(Cipher.ENCRYPT_MODE, keySpec);
// 4 执行
byte[] cipherTextBytes = cipher.doFinal(clearTextBytes);
// 5 返回密文字符集
return cipherTextBytes;
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 原始解密
* @param cipherTextBytes 密文字