C# RSA加密解密RSAHelper

public class RSAHelper
{
public static void Generator(out string PrivarteKey, out string PublicKey, int KeySize = 1024)
{
RSACryptoServiceProvider rea = new RSACryptoServiceProvider(KeySize);
PrivarteKey = rea.ToXmlString(true);
PublicKey = rea.ToXmlString(false);
}

/// <summary>
/// RSA加密数据
/// </summary>
/// <param name="express">要加密数据</param>
/// <param name="KeyContainerName">密匙容器的名称</param>
/// <returns></returns>
public static string RSAEncryption(string content, string publickey)
{

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromXmlString(publickey);
cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
return Convert.ToBase64String(cipherbytes);

}
/// <summary>
/// RSA解密数据
/// </summary>
/// <param name="express">要解密数据</param>
/// <param name="KeyContainerName">密匙容器的名称</param>
/// <returns></returns>
public static string RSADecrypt(string content, string privatekey)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromXmlString(privatekey);
cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);

return Encoding.UTF8.GetString(cipherbytes);

}

/// <summary>
/// 生成数字签名
/// </summary>
/// <param name="originalText">原文</param>
/// <param name="privateKey"></param>
/// <returns></returns>
public static string GenSign(string originalText, string privateKey)
{
byte[] byteData = Encoding.UTF8.GetBytes(originalText);
RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
provider.FromXmlString(privateKey);
//使用SHA1进行摘要算法，生成签名
byteData = provider.SignData(byteData, new SHA1CryptoServiceProvider());
return Convert.ToBase64String(byteData);
}

/// <summary>
/// 验证签名
/// </summary>
/// <param name="originalText">原文</param>
/// <param name="SignedData">签名</param>
/// <param name="publicKey">公钥</param>
/// <returns></returns>
public static bool VerifySigned(string originalText, string signedData, string publicKey)
{
RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
provider.FromXmlString(publicKey);
byte[] byteData = Encoding.UTF8.GetBytes(originalText);
byte[] signData = Convert.FromBase64String(signedData);
return provider.VerifyData(byteData, new SHA1CryptoServiceProvider(), signData);
}

}