/// <summary>
/// Private Key Convert Pkcs1->xml
/// </summary>
/// <param name="privateKey"></param>
/// <returns></returns>
public static string PrivateKeyPkcs1ToXml(string privateKey)
{
privateKey = RSAPemFormatHelper.Pkcs1PrivateKeyFormat(privateKey);
var pr = new PemReader(new StringReader(privateKey));
if (!(pr.ReadObject() is AsymmetricCipherKeyPair asymmetricCipherKeyPair))
{
throw new Exception("Private key format is incorrect");
}
var rsaPrivateCrtKeyParameters = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(PrivateKeyInfoFactory.CreatePrivateKeyInfo(asymmetricCipherKeyPair.Private));
var element = new XElement("RSAKeyValue");
var privateModulus = new XElement("Modulus", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Modulus.ToByteArrayUnsigned()));
var privateExponent = new XElement("Exponent", Convert.ToBase64String(rsaPrivateCrtKeyParameters.PublicExponent.ToByteArrayUnsigned()));
var privateP = new XElement("P", Convert.ToBase64String(rsaPrivateCrtKeyParameters.P.ToByteArrayUnsigned()));
var privateQ = new XElement("Q", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Q.ToByteArrayUnsigned()));
var privateDp = new XElement("DP", Convert.ToBase64String(rsaPrivateCrtKeyParameters.DP.ToByteArrayUnsigned()));
var privateDq = new XElement("DQ", Convert.ToBase64String(rsaPrivateCrtKeyParameters.DQ.ToByteArrayUnsigned()));
var privateInverseQ = new XElement("InverseQ", Convert.ToBase64String(rsaPrivateCrtKeyParameters.QInv.ToByteArrayUnsigned()));
var privateD = new XElement("D", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Exponent.ToByteArrayUnsigned()));
element.Add(privateModulus);
element.Add(privateExponent);
element.Add(privateP);
element.Add(privateQ);
element.Add(privateDp);
element.Add(privateDq);
element.Add(privateInverseQ);
element.Add(privateD);
return(element.ToString());
}
/// <summary>
/// Private Key Convert Pkcs1->Pkcs8
/// </summary>
/// <param name="privateKey"></param>
/// <returns></returns>
public static string PrivateKeyPkcs1ToPkcs8(string privateKey)
{
privateKey = RSAPemFormatHelper.Pkcs1PrivateKeyFormat(privateKey);
var pemReader = new PemReader(new StringReader(privateKey));
if (pemReader.ReadObject() is AsymmetricCipherKeyPair asymmetricCipherKeyPair)
{
using var writer = new StringWriter();
var pemWriter = new PemWriter(writer);
var pkcs8Gen = new Pkcs8Generator(asymmetricCipherKeyPair.Private);
pemWriter.WriteObject(pkcs8Gen);
pemWriter.Writer.Close();
return(writer.ToString());
}
throw new ArgumentException($"Unknown format for Private Key: cannot convert to {nameof(AsymmetricCipherKeyPair)}.");
}
