Support
Joined: 18 Jul 2005
Posts: 731
|
| Posted: Thu Jul 08, 2010 5:49 am Post subject: HOWTO: Create custom license service methods |
|
|
You can create and add your own methods to the default set of license service methods. These custom methods can be called from your software using the CryptoLicense.QueryWebService method. The following demonstrates how to add a custom method which retrieves the number of activations remaining for a license:
In the App_Code/LicenseService.cs or App_Code/LicenseService.vb file of your license service, add following method to LicenseServiceClass :
[C#]
| Code: | // The custom method must be marked with a "WebMethod" attribute and must have a return type of "string"
[WebMethod]
public string GetCurrentActivations(string licenseCode, string settingsFilePath)
{
string ret = "";
try
{
this.Initialise(settingsFilePath);
// Decrypt license code
licenseCode = this.Generator.DecryptString(licenseCode);
CryptoLicense lic = new CryptoLicense(licenseCode, this.Generator.GetValidationKey());
if (lic.ValidateSignature())
{
ret = this.GetNumberOfActivations(lic, "", "").ToString();
}
}
catch { }
// Return result in encrypted form for security.
return this.Generator.EncryptString(ret);
} |
[VB.Net]
| Code: | ' The custom method must be marked with a "WebMethod" attribute and must have a return type of "string"
<WebMethod> _
Public Function GetCurrentActivations(licenseCode As String, settingsFilePath As String) As String
Dim ret As String = ""
Try
Me.Initialise(settingsFilePath)
' Decrypt license code
licenseCode = Me.Generator.DecryptString(licenseCode)
Dim lic As New CryptoLicense(licenseCode, Me.Generator.GetValidationKey())
If lic.ValidateSignature() Then
ret = Me.GetNumberOfActivations(lic, "", "").ToString()
End If
Catch
End Try
' Return result in encrypted form for security.
Return Me.Generator.EncryptString(ret)
End Function |
You can then call this method from your software as follows:
[C#]
| Code: | // Standard setup...
CryptoLicense lic = new CryptoLicense();
lic.ValidationKey = "{validation key for your project";
lic.LicenseCode = "{a license code generated with a 'Limit Machines To' setting}";
lic.LicenseServiceURL = "{url of your license service}";
// Call the custom "GetCurrentActivations" web method.
// The license code can be sent in encrypted form using EncryptString method for security
string ret = lic.QueryWebService("GetCurrentActivations",
new string[] { "licenseCode", "settingsFilePath" }, // params
new string[] { lic.EncryptString(lic.LicenseCode), "" } // param values
);
// Return value is encrypted, decrypt it and show the result
MessageBox.Show("CurrentActivations = " + lic.DecryptString(ret)); |
[VB.Net]
| Code: | ' Standard setup...
Dim lic As CryptoLicense = New CryptoLicense()
lic.ValidationKey = "{validation key for your project"
lic.LicenseCode = "{a license code generated with a 'Limit Machines To' setting}"
lic.LicenseServiceURL = "{url of your license service}"
' Call the custom "GetCurrentActivations" web method.
' The license code can be sent in encrypted form using EncryptString method for security
Dim paramNames() As String = {"licenseCode", "settingsFilePath"} ' params
Dim paramValues() As String = {lic.EncryptString(lic.LicenseCode), ""} ' param values
Dim ret As String = lic.QueryWebService("GetCurrentActivations", paramNames, paramValues)
' Return value is encrypted, decrypt it and show the result
MessageBox.Show("CurrentActivations = " + lic.DecryptString(ret)) |
[/b] |
|
Search
Forum Index
-> CryptoLicensing For .Net