package gaoKe.bang.web.controller;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
/**
* 高級加密標準(英語:Advanced Encryption Standard,縮寫:AES);
* 在密碼學中又稱Rijndael加密法,是美國聯邦政府採用的一種區塊加密標準。
* @author bang
*
*/
public class AES {
// 加密
public static String Encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
return null;
}
// 判斷Key是否爲16位
if (sKey.length() != 16) {
return null;
}
byte[] raw = sKey.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/補碼方式"
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
return new Base64().encodeToString(encrypted);//此處使用BASE64做轉碼功能,同時能起到2次加密的作用。
}
// 解密
public static String Decrypt(String sSrc, String sKey) throws Exception {
try {
// 判斷Key是否正確
if (sKey == null) {
return null;
}
// 判斷Key是否爲16位
if (sKey.length() != 16) {
return null;
}
byte[] raw = sKey.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
try {
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original,"utf-8");
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 {
/*
* 此處使用AES-128-ECB加密模式,key需要爲16位。
*/
String cKey = "1234567890123456";
// 需要加密的字串
String cSrc = "三峽高科移動後臺服務程序";
System.out.println("加密前的字串是:"+cSrc);
// 加密
String enString = AES.Encrypt(cSrc, cKey);
System.out.println("加密後的字串是:" + enString);
// 解密
String DeString = AES.Decrypt(enString, cKey);
System.out.println("解密後的字串是:" + DeString);
}
}
[C#]代碼:加密——解密
/// <summary>
/// 有密碼的AES加密
/// </summary>
/// <param name="text">加密字符</param>
/// <param name="password">加密的密碼</param>
/// <param name="iv">密鑰</param>
/// <returns></returns>
public static string Encrypt(string toEncrypt,string key)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="text"></param>
/// <param name="password"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static string Decrypt(string toDecrypt,string key)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return UTF8Encoding.UTF8.GetString(resultArray);
}
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