密码学中的高级加密标准（Advanced Encryption Standard，AES），又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES（Data Encryption Standard），已经被多方分析且广为全世界所使用。经过五年的甄选流程，高级加密标准由美国国家标准与技术研究院 （NIST）于2001年11月26日发布于FIPS PUB 197，并在2002年5月26日成为有效的标准。2006年，高级加密标准已然成为对称密钥加密中最流行的算法之一。.
该算法为比利时密码学家Joan Daemen和Vincent Rijmen所设计，结合两位作者的名字，以Rijdael之名命之，投稿高级加密标准的甄选流程。（Rijdael的发音近于 "Rhine doll"。）
c# Aes加解密
/// <summary>
/// 加密初始化向量
/// </summary>
private static string EnctyptIV
{
get
{
return EnctyptKey.Substring(0, 16);
}
}
private static string EnctyptIVAmin
{
get
{
return EnctyptKeyAdmin.Substring(0, 16);
}
}
/// <summary>
/// 测试
/// </summary>
public static void Test()
{
//加密初始化向量
string message = "abcdefghigklmnopqrstuvwxyz0123456789";
Console.WriteLine("加密前：" + message);
message = Encrypt(message, EnctyptKey, EnctyptIV);
Console.WriteLine("加密后：" + message);
message = Decrypt(message, EnctyptKey, EnctyptIV);
Console.WriteLine("解密后：" + message);
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="text">明文</param>
/// <returns></returns>
public static string Encrypt(string text)
{
return Encrypt(text, EnctyptKey, EnctyptIV);
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="text">明文</param>
/// <param name="key">密钥</param>
/// <param name="iv">向量</param>
/// <returns></returns>
public static string Encrypt(string text, string key, string iv)
{
RijndaelManaged rijndaelManaged = new RijndaelManaged();
rijndaelManaged.Mode = CipherMode.CBC;
rijndaelManaged.Padding = PaddingMode.PKCS7;
rijndaelManaged.KeySize = 128;
rijndaelManaged.BlockSize = 128;
byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
#region 无用代码
//byte[] keyBytes = new byte[16];
//int len = pwdBytes.Length;
//if (len > keyBytes.Length)
//{
// len = keyBytes.Length;
//}
//System.Array.Copy(pwdBytes, keyBytes, len);
//rijndaelManaged.Key = keyBytes;
#endregion 无用代码
rijndaelManaged.Key = pwdBytes;
byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
rijndaelManaged.IV = ivBytes;
ICryptoTransform iCryptoTransform = rijndaelManaged.CreateEncryptor();
byte[] textBytes = Encoding.UTF8.GetBytes(text);
byte[] targetBytes = iCryptoTransform.TransformFinalBlock(textBytes, 0, textBytes.Length);
return Convert.ToBase64String(targetBytes);
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="text">明文</param>
/// <param name="openEncrypt">是否开启加密</param>
/// <returns></returns>
public static string TryEncrypt(string text, bool openEncrypt = true)
{
if (string.IsNullOrEmpty(text))
return text;
if (openEncrypt)
{
return Encrypt(text, EnctyptKey, EnctyptIV);
}
return text;
}
public static string TryEncryptAdmin(string text, bool openEncrypt = true)
{
if (string.IsNullOrEmpty(text))
return text;
if (openEncrypt)
{
return Encrypt(text, EnctyptKeyAdmin, EnctyptIVAmin);
}
return text;
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="text">密文</param>
/// <param name="openEncrypt">是否开启加密/解密</param>
/// <returns></returns>
public static string TryDecrypt(string text, bool openEncrypt = true)
{
if (string.IsNullOrEmpty(text))
return text;
try
{
if (openEncrypt)
{
return Decrypt(text, EnctyptKey, EnctyptIV);
}
}
catch (Exception ex) { }
return text;
}
public static string TryDecryptAdmin(string text, bool openEncrypt = true)
{
if (string.IsNullOrEmpty(text))
return text;
try
{
if (openEncrypt)
{
return Decrypt(text, EnctyptKeyAdmin, EnctyptIVAmin);
}
}
catch (Exception ex) { }
return text;
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="text">密文</param>
/// <returns></returns>
public static string Decrypt(string text)
{
return Decrypt(text, EnctyptKey, EnctyptIV);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="text">密文</param>
/// <param name="key">密钥</param>
/// <param name="iv">向量</param>
/// <returns></returns>
public static string Decrypt(string text, string key, string iv)
{
if (string.IsNullOrEmpty(text))
return text;
RijndaelManaged rijndaelManaged = new RijndaelManaged();
rijndaelManaged.Mode = CipherMode.CBC;
rijndaelManaged.Padding = PaddingMode.PKCS7;
rijndaelManaged.KeySize = 128;
rijndaelManaged.BlockSize = 128;
byte[] encryptedData = Convert.FromBase64String(text);
byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
#region 无用代码
//byte[] keyBytes = new byte[16];
//int len = pwdBytes.Length;
//if (len > keyBytes.Length)
//{
// len = keyBytes.Length;
//}
//System.Array.Copy(pwdBytes, keyBytes, len);
//rijndaelManaged.Key = keyBytes;
#endregion 无用代码
rijndaelManaged.Key = pwdBytes;
byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
rijndaelManaged.IV = ivBytes;
ICryptoTransform iCryptoTransform = rijndaelManaged.CreateDecryptor();
byte[] targetBytes = iCryptoTransform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
return Encoding.UTF8.GetString(targetBytes);
}
}
