com.github.xphsc.encrypt.AESUtil Maven / Gradle / Ivy

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package com.github.xphsc.encrypt;

import java.security.SecureRandom;
import java.util.HashMap;
import java.util.Map;

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



class AESUtil {
	protected static final String KEY = "NOPO3nzMD3dndwS0MccuMeXCHgVlGOoYyFwLdS24Im2e7YyhB0wrUsyYf0";


    protected static String decrypt(String encryptValue, String key) throws Exception {
        return aesDecryptByBytes(base64Decode(encryptValue), key);
    }


    protected static String encrypt(String value, String key) throws Exception {  
        return base64Encode(aesEncryptToBytes(value, key));  
    }  
	
    private static String base64Encode(byte[] bytes){  
        return Base64Util.encrypt(bytes);
    }  
      
    @SuppressWarnings("static-access")
    private static byte[] base64Decode(String base64Code) throws Exception{  
        return base64Code == null ? null : new Base64Util().decrypt(base64Code);
    }  
      
    private static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {  
        KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128, new SecureRandom(encryptKey.getBytes()));  
  
        Cipher cipher = Cipher.getInstance("AES");  
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));  
          
        return cipher.doFinal(content.getBytes("utf-8"));  
    }  
      
    private static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {  
        KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128, new SecureRandom(decryptKey.getBytes()));  
          
        Cipher cipher = Cipher.getInstance("AES");  
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));  
        byte[] decryptBytes = cipher.doFinal(encryptBytes);  
          
        return new String(decryptBytes);  
    }

    public static void main(String[] args) throws Exception {
        Map params = new HashMap();
        params.put("appid", "1233");
        System.out.println(encrypt("appid","123456"));
    }
}