RSA签约C＃

Question

我需要制作软件激活机制。 所以我最终得到了这个方案： 应用程序基于计算机硬件创建唯一ID。 买方通过电子邮件将此ID发送给我。 我用我的私钥签名，然后发回签名的字符串。 应用程序验证字符串（使用包含的公钥对其进行解码并将其与硬件ID进行比较）。

到目前为止，我完成了硬件ID，我已经用openssl创建了密钥（1024bit），这两个文件是private.pem和public.pem。

我使用了msdn提供的一些代码，但我不太了解如何将我的密钥导入RSA算法。 一些代码如下，任何帮助将不胜感激......

        try
        {
            // Create a UnicodeEncoder to convert between byte array and string.
            ASCIIEncoding ByteConverter = new ASCIIEncoding();

            string dataString = CompID.Text;

            // Create byte arrays to hold original, encrypted, and decrypted data. 
            byte[] originalData = ByteConverter.GetBytes(dataString);
            byte[] signedData;

            // Create a new instance of the RSACryptoServiceProvider class  
            // and automatically create a new key-pair.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            // Export the key information to an RSAParameters object. 
            // You must pass true to export the private key for signing. 
            // However, you do not need to export the private key 
            // for verification.
            RSAParameters Key = RSAalg.ExportParameters(true);

            // Hash and sign the data.
            signedData = HashAndSignBytes(originalData, Key);
            ActCode.Text = Encoding.UTF8.GetString(signedData, 0, signedData.Length);                

            // Verify the data and display the result to the  
            // console. 
            if (VerifySignedHash(originalData, signedData, Key))
            {
                MessageBox.Show("The data was verified.");
            }
            else
            {
                MessageBox.Show("The data does not match the signature.");
            }

        }
        catch (ArgumentNullException)
        {
            MessageBox.Show("The data was not signed or verified");

        }

方法：

    public static byte[] HashAndSignBytes(byte[] DataToSign, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the  
            // key from RSAParameters.  
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Hash and sign the data. Pass a new instance of SHA1CryptoServiceProvider 
            // to specify the use of SHA1 for hashing. 
            return RSAalg.SignData(DataToSign, new SHA1CryptoServiceProvider());
        }
        catch (CryptographicException e)
        {
            MessageBox.Show(e.Message);

            return null;
        }
    }

    public static bool VerifySignedHash(byte[] DataToVerify, byte[] SignedData, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the  
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Verify the data using the signature.  Pass a new instance of SHA1CryptoServiceProvider 
            // to specify the use of SHA1 for hashing. 
            return RSAalg.VerifyData(DataToVerify, new SHA1CryptoServiceProvider(), SignedData);

        }
        catch (CryptographicException e)
        {
            MessageBox.Show(e.Message);

            return false;
        }
    }