RSA加密算法

class Program
{
static void Main(string[] args)
{

RSAPublicKey P = new RSAPublicKey();
P.Exponent = "AAAAAAAA";
P.Modulus = "BBBBBBBBBB";
string S = XmlUtil.Serializer(typeof(RSAPublicKey), P);
//string activeDir = Server.MapPath("~/Custom/");

// RSAPublicKey PublicKey = XmlUtil.Deserialize(typeof(RSAPublicKey), @"D:\xml\Publickey.xml") as RSAPublicKey;
string a = "123";
string a2 = RSAEncrypt(a);
string b = RSADecrypt(a2);
}

private static RSAPublicKey getRSAPublicKey()
{
RSAPublicKey PublicKey = XmlUtil.Deserialize(typeof(RSAPublicKey), @"D:xmlPublickey.xml") as RSAPublicKey;
return PublicKey;

}

private static RSAPrivateKey getRSARSAPrivateKey()
{
RSAPrivateKey PrivateKey = XmlUtil.Deserialize(typeof(RSAPrivateKey), @"D:xmlPrivateKey.xml") as RSAPrivateKey;
return PrivateKey;

}
/// <summary>
/// RSA加密 yms2016
/// </summary>
/// <param name="plainText">明文</param>
/// <returns>密文</returns>
public static string RSAEncrypt(string plainText)
{
RSAPublicKey key = getRSAPublicKey();
try
{
RSAParameters rsaParam = new RSAParameters();
//rsaParam.Exponent = Convert.FromBase64String(GlobalParameter.RSA_PARAM_EXPONENT);
//rsaParam.Modulus = Convert.FromBase64String(GlobalParameter.RSA_PARAM_MODULUS);

rsaParam.Exponent = Convert.FromBase64String(key.Exponent.Trim());
rsaParam.Modulus = Convert.FromBase64String(key.Modulus.Trim());

return RSAEncrypt(plainText, rsaParam);
}
catch (CryptographicException)
{
return null;
}
}

/// <summary>
/// RSA解密
/// </summary>
/// <param name="cypherText">密文</param>
/// <returns>明文</returns>
public static string RSADecrypt(string cypherText)
{
RSAPrivateKey key = getRSARSAPrivateKey();
try
{
RSAParameters rsaParam = new RSAParameters();
//rsaParam.Exponent = Convert.FromBase64String(GlobalParameter.RSA_PARAM_EXPONENT);
//rsaParam.Modulus = Convert.FromBase64String(GlobalParameter.RSA_PARAM_MODULUS);
//rsaParam.InverseQ = Convert.FromBase64String(GlobalParameter.RSA_PARAM_INVERSEQ);
//rsaParam.D = Convert.FromBase64String(GlobalParameter.RSA_PARAM_D);
//rsaParam.P = Convert.FromBase64String(GlobalParameter.RSA_PARAM_P);
//rsaParam.Q = Convert.FromBase64String(GlobalParameter.RSA_PARAM_Q);
//rsaParam.DP = Convert.FromBase64String(GlobalParameter.RSA_PARAM_DP);
//rsaParam.DQ = Convert.FromBase64String(GlobalParameter.RSA_PARAM_DQ);

//rsaParam.Exponent = Convert.FromBase64String("AQAB");
//rsaParam.Modulus = Convert.FromBase64String("6YPSotU5ioFyM0fyJIz2uP5NUodIkTC3mOVemRd8OV5tCtdf+LmpnI4NIR5phxoIdN7GzoLiryGWs/E4jUvjCkVCY+XO4R+xEkrUSBCytUjiSHcMGvjX3ZosGoT7H/IuMGclRz9lOptbCSWZYQmfHea4yrJ1Azybu9lj1BT6ZnU=");
//rsaParam.InverseQ = Convert.FromBase64String("USMiemxLJHeYXFk0N2gfVz4x7q/Wc1L4y9/KRRzAXgjc6cq7223SL1td7lCl/sX4puRevt466U6tZRG/u6lozA==");
//rsaParam.D = Convert.FromBase64String("sYVTdhKfIdpylOWXAY5gahZ5dcn+stHUYVnN5phiCcLtJpbBEPckKC4dcRYLp3d1AlPx00DRT847ISS6l0AfolUclUanw1mTUfe29D7TrG4/ZGBqNbit1PcqT/gT+dl5JWC1cZU/+Z3fGNpjMwwWhsGlimow5ViRpalt4FiPMoE=");
//rsaParam.P = Convert.FromBase64String("/wh2zBrCZGux+aLRCakuH/oGB4PsgcYrILWz7esWLBpqZg5P3YHuOV55aCbPpu8EwFfvs0XgY8ra02odUGlssQ==");
//rsaParam.Q = Convert.FromBase64String("6mZ5IhA6osdI7r/D2JkGE3YAUS6kE3iEJxwS8mv5Dnse5b/xVg/ShhhGEeEywIktLZdKSymW0ilxAMciPPV3BQ==");
//rsaParam.DP = Convert.FromBase64String("17jGG/FKmvzJp3pETWKwZFXtga/ifwcr9dgcoVPoBlg1xau3fItqAVbbZPDnVrH5F+WKGN8zZdXx8UBiGWGDkQ==");
//rsaParam.DQ = Convert.FromBase64String("uexEIte6msj1uaJT5uch4afUgpA7RtJuCFOFV9J6/5h7HoOMGtZ8By8TzTTSO9PTCPmazVmUruh+IL7TEoUlPQ==");

rsaParam.Exponent = Convert.FromBase64String(key.Exponent.Trim());
rsaParam.Modulus = Convert.FromBase64String(key.Modulus.Trim());
rsaParam.InverseQ = Convert.FromBase64String(key.InverseQ.Trim());
rsaParam.D = Convert.FromBase64String(key.D.Trim());
rsaParam.P = Convert.FromBase64String(key.P.Trim());
rsaParam.Q = Convert.FromBase64String(key.Q.Trim());
rsaParam.DP = Convert.FromBase64String(key.DP.Trim());
rsaParam.DQ = Convert.FromBase64String(key.DQ.Trim());

return RSADecrypt(cypherText, rsaParam);
}
catch (CryptographicException)
{
return null;
}
}

/// <summary>
/// RSA加密
/// </summary>
/// <param name="plainText">明文</param>
/// <param name="rsaParam">公钥私钥参数</param>
/// <returns>密文</returns>
public static string RSAEncrypt(string plainText, RSAParameters rsaParam)
{
try
{
UTF8Encoding encoder = new UTF8Encoding();
byte[] dataToEncrypt = encoder.GetBytes(plainText);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParam);
byte[] bytesCypherText = rsa.Encrypt(dataToEncrypt, false);
return Convert.ToBase64String(bytesCypherText);
}
catch (CryptographicException)
{
return null;
}
}

/// <summary>
/// RSA解密
/// </summary>
/// <param name="cypherText">密文</param>
/// <param name="rsaParam">公钥私钥参数</param>
/// <returns>明文</returns>
public static string RSADecrypt(string cypherText, RSAParameters rsaParam)
{
try
{
byte[] dataToDecrypt = Convert.FromBase64String(cypherText);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParam);
byte[] bytesPlainText = rsa.Decrypt(dataToDecrypt, false);
UTF8Encoding encoder = new UTF8Encoding();
return encoder.GetString(bytesPlainText);
}
catch (CryptographicException)
{
return null;
}
}
}

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