AES-128-CBC-PKCS5Padding加解密

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;


/**
 * @author RickSun && iFillDream
 * @Description AES-128-CBC-PKCS5Padding加密工具
 * @Date 2020/5/12 16:42
 * @Param 
 * @return 
 **/ 
public class AESUtil {


    //加密用的Key 可以用26个字母和数字组成;此处使用AES-128-CBC加密模式，key需要为16位
    private static final String key = "1234567890abcdef";
    //加密向量
    private static final String vi = "1234567890abcdef";


    public static String Encrypt(String sSrc) throws Exception {
        return Encrypt(sSrc,key);
    }


        // 加密
    public static String Encrypt(String sSrc, String sKey) throws Exception {  
        if (sKey == null) {  
            System.out.print("Key为空null");  
            return null;  
        }  
        // 判断Key是否为16位  
        if (sKey.length() != 16) {  
            System.out.print("Key长度不是16位");  
            return null;  
        }  
        byte[] raw = sKey.getBytes();  
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");  
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式"  
        IvParameterSpec iv = new IvParameterSpec(vi.getBytes());//使用CBC模式，需要一个向量iv，可增加加密算法的强度
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);  
        byte[] encrypted = cipher.doFinal(sSrc.getBytes());


        return new BASE64Encoder().encode(encrypted).replace("\r\n","");//此处使用BASE64做转码功能，同时能起到2次加密的作用。
    }  
  
    // 解密  
    public static String Decrypt(String sSrc, String sKey) throws Exception {  
        try {  
            // 判断Key是否正确  
            if (sKey == null) {  
                System.out.print("Key为空null");  
                return null;  
            }  
            // 判断Key是否为16位  
            if (sKey.length() != 16) {  
                System.out.print("Key长度不是16位");  
                return null;  
            }  
            byte[] raw = sKey.getBytes("ASCII");  
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");  
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");  
            IvParameterSpec iv = new IvParameterSpec(vi.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);  
            byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密  
            try {  
                byte[] original = cipher.doFinal(encrypted1);  
                String originalString = new String(original);  
                return originalString;  
            } catch (Exception e) {  
                System.out.println(e.toString());  
                return null;  
            }  
        } catch (Exception ex) {  
            System.out.println(ex.toString());  
            return null;  
        }  
    }  
  
    public static void main(String[] args) throws Exception {  
        //明文
        String cSrc = "1";
        System.out.println(cSrc);


        // 加密  
        long lStart = System.currentTimeMillis();  
        String enString = AESUtil.Encrypt(cSrc, key);
        System.out.println("加密后的字串是：" + enString);  
        long lUseTime = System.currentTimeMillis() - lStart;
        System.out.println("加密耗时：" + lUseTime + "毫秒");


        // 解密  
        lStart = System.currentTimeMillis();  
        String DeString = AESUtil.Decrypt(enString, key);
        System.out.println("解密后的字串是：" + DeString);
        lUseTime = System.currentTimeMillis() - lStart;
        System.out.println("解密耗时：" + lUseTime + "毫秒");  
    }  
}
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