java C# IOS 通用对称加解密

package com.commernet.codeenforcement.Helper; import java.io.UnsupportedEncodingException; import java.util.Locale; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.SecretKeySpec; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.telephony.TelephonyManager; import android.util.Base64; import android.util.DisplayMetrics; /** * 常用工具类 * * @author talver */ public class Security { final static String AES_KEY = "Q*1_3@c!4kd^j&g%"; /** * 字符串对称加密 * * @param str * 待加密字符串 * @return 加密后字符串 */ public static String aesEncrypt(String str) { try { String password = AES_KEY; SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); String strTmp = Base64.encodeToString(cipher.doFinal(str.getBytes()), Base64.DEFAULT); return strTmp; } catch (Exception e) { e.printStackTrace(); } return str; } /** * 字符串对称解密 * * @param str * 待解密字符串 * @return 解密后字符串 */ public static String aesDecrypt(String str) { try { String password = AES_KEY; SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, skeySpec); String strTmp = new String(cipher.doFinal(Base64.decode(str, Base64.DEFAULT))); return strTmp; } catch (Exception ex) { ex.printStackTrace(); } return str; } }