/// <summary>
/// Convert RSA Public Key from PEM to XML format
/// </summary>
/// <param name="publicKey">Public Key</param>
/// <returns></returns>
public static string PublicKeyPemToXml(string publicKey)
{
publicKey = RsaPemFormatHelper.PublicKeyFormat(publicKey);
PemReader pr = new PemReader(new StringReader(publicKey));
object obj = pr.ReadObject();
if (!(obj is RsaKeyParameters rsaKey))
{
throw new Exception("Public key format is incorrect");
}
XElement publicElement = new XElement("RSAKeyValue");
XElement pubmodulus = new XElement("Modulus", Convert.ToBase64String(rsaKey.Modulus.ToByteArrayUnsigned()));
XElement pubexponent = new XElement("Exponent", Convert.ToBase64String(rsaKey.Exponent.ToByteArrayUnsigned()));
publicElement.Add(pubmodulus);
publicElement.Add(pubexponent);
return(publicElement.ToString());
}
/// <summary>
/// Create an RSA parameter based on XML format public key
/// </summary>
/// <param name="publicKey"></param>
/// <returns>RSAParameters</returns>
protected sealed override RSAParameters CreateRsapFromPublicKey(string publicKey)
{
publicKey = RsaPemFormatHelper.PublicKeyFormat(publicKey);
PemReader pr = new PemReader(new StringReader(publicKey));
object obj = pr.ReadObject();
if (!(obj is RsaKeyParameters rsaKey))
{
throw new Exception("Public key format is incorrect");
}
RSAParameters rsap = new RSAParameters();
rsap.Modulus = rsaKey.Modulus.ToByteArrayUnsigned();
rsap.Exponent = rsaKey.Exponent.ToByteArrayUnsigned();
return(rsap);
}
