/// <summary>
/// Generates a new floating license.
/// </summary>
/// <param name="name">Name of the license holder</param>
/// <param name="publicKey">The public key of the license server</param>
/// <returns>The generated license XML string</returns>
public string GenerateFloatingLicense(string name, string publicKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
RSAKeyExtensions.FromXmlString(rsa, privateKey);
var doc = new XmlDocument();
var license = doc.CreateElement("floating-license");
doc.AppendChild(license);
var publicKeyEl = doc.CreateElement("license-server-public-key");
license.AppendChild(publicKeyEl);
publicKeyEl.InnerText = publicKey;
var nameEl = doc.CreateElement("name");
license.AppendChild(nameEl);
nameEl.InnerText = name;
var signature = GetXmlDigitalSignature(doc, rsa);
doc.FirstChild.AppendChild(doc.ImportNode(signature, true));
var ms = new MemoryStream();
var writer = XmlWriter.Create(ms, new XmlWriterSettings
{
Indent = true,
Encoding = Encoding.UTF8
});
doc.Save(writer);
ms.Position = 0;
return(new StreamReader(ms).ReadToEnd());
}
}
/// <summary>
/// Generates a new license using a specified signing <paramref name="algorithm"/>
/// </summary>
/// <param name="name">The name of the license holder</param>
/// <param name="id">Id of the license holder</param>
/// <param name="expirationDate">License expiry date</param>
/// <param name="attributes">Extra information stored as key/value in the license file</param>
/// <param name="licenseType">Type of the license</param>
/// <param name="algorithm">Signing algorithm to use for signing the XML</param>
/// <returns>The generated license string</returns>
public string Generate(string name, Guid id, DateTime expirationDate, IDictionary <string, string> attributes, LicenseType licenseType, SigningAlgorithm algorithm)
{
using (var rsa = new RSACryptoServiceProvider())
{
RSAKeyExtensions.FromXmlString(rsa, privateKey);
var doc = CreateDocument(id, name, expirationDate, attributes, licenseType);
var signature = GetXmlDigitalSignature(doc, rsa, algorithm);
doc.FirstChild.AppendChild(doc.ImportNode(signature, true));
var ms = new MemoryStream();
var writer = XmlWriter.Create(ms, new XmlWriterSettings
{
Indent = true,
Encoding = Encoding.UTF8
});
doc.Save(writer);
ms.Position = 0;
return(new StreamReader(ms).ReadToEnd());
}
}
private bool TryGetValidDocument(string licensePublicKey, XmlDocument doc)
{
var rsa = new RSACryptoServiceProvider();
RSAKeyExtensions.FromXmlString(rsa, licensePublicKey);
var nsMgr = new XmlNamespaceManager(doc.NameTable);
nsMgr.AddNamespace("sig", "http://www.w3.org/2000/09/xmldsig#");
var signedXml = new SignedXml(doc);
var sig = (XmlElement)doc.SelectSingleNode("//sig:Signature", nsMgr);
if (sig == null)
{
Log.WarnFormat("[Licensing] Could not find this signature node on license:\r\n{0}", License);
return(false);
}
signedXml.LoadXml(sig);
return(signedXml.CheckSignature(rsa));
}
