。net加密解密相关方法

AES加密及解密

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声明密钥级偏移向量--------
/// <summary>
/// 加密密钥
/// </summary>
private static readonly string Default_AES_Key = "";
/// <summary>
/// 偏移向量
/// </summary>
private static byte[] Keys = {  };
 

 

加密算法--------/// <summary>
/// 对称加密算法AES RijndaelManaged加密(RijndaelManaged（AES）算法是块式加密算法)
/// </summary>
/// <param name="encryptString">待加密字符串</param>
/// <returns>加密结果字符串</returns>
public static string AES_Encrypt(string encryptString)
{
return AES_Encrypt(encryptString, Default_AES_Key);
}
/// <summary>
/// 对称加密算法AES RijndaelManaged加密(RijndaelManaged（AES）算法是块式加密算法)
/// </summary>
/// <param name="encryptString">待加密字符串</param>
/// <param name="encryptKey">加密密钥，须半角字符</param>
/// <returns>加密结果字符串</returns>
public static string AES_Encrypt(string encryptString, string encryptKey)
{
encryptKey = GetSubString(encryptKey, 32, "");
encryptKey = encryptKey.PadRight(32, ' ');
 
RijndaelManaged rijndaelProvider = new RijndaelManaged();
rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
rijndaelProvider.IV = Keys;
ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();
 
byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);
 
return Convert.ToBase64String(encryptedData);
}

解密算法--------
/// <summary>
/// 对称加密算法AES RijndaelManaged解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string AES_Decrypt(string decryptString)
{
return AES_Decrypt(decryptString, Default_AES_Key);
}
 
/// <summary>
/// 对称加密算法AES RijndaelManaged解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串,失败返回空</returns>
public static string AES_Decrypt(string decryptString, string decryptKey)
{
try
{
decryptKey = GetSubString(decryptKey, 32, "");
decryptKey = decryptKey.PadRight(32, ' ');
 
RijndaelManaged rijndaelProvider = new RijndaelManaged();
rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
rijndaelProvider.IV = Keys;
ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();
 
byte[] inputData = Convert.FromBase64String(decryptString);
byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);
 
return Encoding.UTF8.GetString(decryptedData);
}
catch
{
return string.Empty;
}
}

未完待续。。。。