AES 加密

Posted 2020-11-08 疯狂的妞妞

API提供了算法，代码很简单，拿走用吧……

 

import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * 对称加密
 * 
 * @author ChenSS 2016/11/30
 * @version 1.0
 */
public class AES {
    private static IvParameterSpec iv = new IvParameterSpec("1234567890654321".getBytes());
    
    public static void main(String[] args) {
        try {
            String key = MD5.hexBit16("a");
            String encryStr = AES.encryptBase64("abcd", key);
            System.out.println("密文:" + encryStr);
            String decryStr = AES.decryptBase64(encryStr, key);
            System.out.println("明文:" + decryStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public static String encryptBase64(String data, String publicKey) throws Exception {
        return Base64.byteArrayToBase64(encrypt(data.getBytes(), publicKey));
    }

    public static String decryptBase64(String encryptedData, String privateKey) throws Exception {
        return new String(decrypt(Base64.base64ToByteArray(encryptedData), privateKey));
    }

    public static String encryptHex(String data, String publicKey) throws Exception {
        return Hex.encodeToString(encrypt(data.getBytes(), publicKey));
    }
    
    public static String decryptHex(String encryptedData, String privateKey) throws Exception {
        return new String(decrypt(Hex.decode(encryptedData.toCharArray()), privateKey));
    }
    
    public static IvParameterSpec getIV(byte[] iv){
        return new IvParameterSpec(iv);
    }
    
    public static Key getKey(byte[] key){
        return new SecretKeySpec(key, "AES");
    }
    
    public static byte[] encrypt(byte[] data, String key) throws Exception{
        return encrypt(data, new SecretKeySpec(key.getBytes(), "AES"),iv);
    }
    
    public static byte[] decrypt(byte[] data, String key) throws Exception{
        return decrypt(data, new SecretKeySpec(key.getBytes(), "AES"),iv);
    }
    
    /**
     * 加密
     */
    public static byte[] encrypt(byte[] data, Key keySpec, IvParameterSpec iv) throws Exception {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);
        return cipher.doFinal(data);
    }
    
    /**
     * 解密
     */
    public static byte[] decrypt(byte[] data, Key keySpec, IvParameterSpec iv) throws Exception {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, keySpec, iv);
        return cipher.doFinal(data);
    }
}