C# Class ComponentFactory.Krypton.Navigator.EncryptedLicenseProvider

Defines a .NET LicenseProvider that uses encrypted licenses generated by the Infralution Licensing System.

The Infralution Licensing System provides a secure way of licensing .NET controls, components and applications. Licenses are protected using public key encryption to minimize possibility of cracking.

Components or controls use the LicenseProviderAttribute to specify this class as the LicenseProvider

Inheritance: System.ComponentModel.LicenseProvider

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Private Properties

Property	Type	Description
ArrayEqual	bool
ArraySize	int
FromHex	byte[]
GetEncryptionKey	byte[]
GetLicense	EncryptedLicense
LoadLicense	EncryptedLicense
Strip	string
ToHex	string

Public Methods

Method	Description
GenerateKey ( string password, string productInfo, UInt16 serialNo ) : string	Generate a new encrypted license using the given password If there is no installed license for the Infralution Licensing System then the only allowed password is "TEST" and the only allowed serial numbers are 1 or 0. To use the licensed version of this method ensure that the file Infralution.Licensing.EncryptedLicenseProvider.lic exists in the same directory as the Infralution.Licensing.dll and contains a valid license key for the Licensing System.
GenerateLicenseParameters ( string password ) : string	Generate the XML license parameter string that is used to validate licenses generated using the given password
GetLicense ( System.ComponentModel.LicenseContext context, Type type, object instance, bool allowExceptions ) : License
InstallLicense ( Type type, string licenseKey ) : EncryptedLicense	Install a license for the given type. This method is used by client applications to allow customers to register license for components. The generic Infralution.Licensing.LicenseInstallForm uses this method to install licenses. Client components may implement their own registration forms that call this method. You must call SetParameters before using this method.
SetParameters ( string licenseParameters ) : void	Set the parameters used to validate licenses created by this provider. This must be called by the client software prior to obtaining licenses using the EncryptedLicenseProvider. The parameters are generated using the Infralution License Key Generator and pasted into the calling client code.
ValidateLicenseKey ( string licenseKey ) : EncryptedLicense	Validate that the given license key is valid for the current licensing parameters This method provides a mechanism to validate that a given license key is valid prior to attempting to install it. This can be useful if you want to check the EncryptedLicense.ProductInfo before installing the license. You must call SetParameters before using this method.

Protected Methods

Method	Description
GetLicenseDirectory ( System.ComponentModel.LicenseContext context, Type type ) : string	Return the directory used to store license files
GetLicenseFilePath ( System.ComponentModel.LicenseContext context, Type type ) : string	Called by GetLicenseKey to get the file path to obtain the license from (if there is no runtime license saved in the context) This can be overridden to change the file used to store the design time license for the provider. By default the the license file is stored in the same directory as the component executable with the name based on the fully qualified type name eg MyNamespace.MyControl.lic
GetLicenseKey ( System.ComponentModel.LicenseContext context, Type type ) : string	Return the license key for the given context and type This can be overridden to change where the license key is stored by the provider. For instance a derived class could override this method to store the key in the Registry.
ReadKeyFromFile ( string licenseFile ) : string	Read a license key from the given file
ReadKeyFromRegistry ( ) : string	Grab the key from the registry.

Private Methods

Method	Description
ArrayEqual ( byte a1, byte a2 ) : bool	Are the contents of the two byte arrays equal
ArraySize ( int length ) : int	Return the array size to use when declaring an array of the given length. This is used to account for the difference between declaring VB and C# arrays and permit automatic conversion of the code to VB
FromHex ( string hex ) : byte[]	Converts a hexadecimal string into a byte array.
GetEncryptionKey ( string password ) : byte[]	Generate an 8 byte DES encryption key using the given password Only the first 7 bytes of the key returned are used. This enables us to reduce the size of the final license keys by 8 bytes.
GetLicense ( string licenseKey, string password ) : EncryptedLicense	Return the license information from the given license key
LoadLicense ( System.ComponentModel.LicenseContext context, Type type, string licenseKey ) : EncryptedLicense	Extract the license for the given type from the given licenseKey
Strip ( string value, string characters ) : string	Return the given input string stripped of the given characters
ToHex ( byte data ) : string	Converts a byte array into a hexadecimal representation.

Method Details

GenerateKey() public method

Generate a new encrypted license using the given password

If there is no installed license for the Infralution Licensing System then the only allowed password is "TEST" and the only allowed serial numbers are 1 or 0. To use the licensed version of this method ensure that the file Infralution.Licensing.EncryptedLicenseProvider.lic exists in the same directory as the Infralution.Licensing.dll and contains a valid license key for the Licensing System.

public GenerateKey ( string password, string productInfo, UInt16 serialNo ) : string
password	string	The password used to encrypted the license data
productInfo	string	User defined data about the product being licensed
serialNo	System.UInt16	The unique license serial number
return	string

GenerateLicenseParameters() public method

Generate the XML license parameter string that is used to validate licenses generated using the given password

public GenerateLicenseParameters ( string password ) : string
password	string	The password used to encrypted the license data
return	string

GetLicense() public method

public GetLicense ( System.ComponentModel.LicenseContext context, Type type, object instance, bool allowExceptions ) : License
context	System.ComponentModel.LicenseContext
type	System.Type
instance	object
allowExceptions	bool
return	License

GetLicenseDirectory() protected method

Return the directory used to store license files

protected GetLicenseDirectory ( System.ComponentModel.LicenseContext context, Type type ) : string
context	System.ComponentModel.LicenseContext	The licence context
type	System.Type	The type being licensed
return	string

GetLicenseFilePath() protected method

Called by GetLicenseKey to get the file path to obtain the license from (if there is no runtime license saved in the context)

This can be overridden to change the file used to store the design time license for the provider. By default the the license file is stored in the same directory as the component executable with the name based on the fully qualified type name eg MyNamespace.MyControl.lic

protected GetLicenseFilePath ( System.ComponentModel.LicenseContext context, Type type ) : string
context	System.ComponentModel.LicenseContext	The licence context
type	System.Type	The type to get the license for
return	string

GetLicenseKey() protected method

Return the license key for the given context and type

This can be overridden to change where the license key is stored by the provider. For instance a derived class could override this method to store the key in the Registry.

protected GetLicenseKey ( System.ComponentModel.LicenseContext context, Type type ) : string
context	System.ComponentModel.LicenseContext	The license context
type	System.Type	The type to get the key for
return	string

InstallLicense() public method

Install a license for the given type.

This method is used by client applications to allow customers to register license for components. The generic Infralution.Licensing.LicenseInstallForm uses this method to install licenses. Client components may implement their own registration forms that call this method. You must call SetParameters before using this method.

public InstallLicense ( Type type, string licenseKey ) : EncryptedLicense
type	System.Type	The type to install the license for
licenseKey	string	The license key to install
return	EncryptedLicense

ReadKeyFromFile() protected method

Read a license key from the given file

protected ReadKeyFromFile ( string licenseFile ) : string
licenseFile	string	The path to the license file to read the key from
return	string

ReadKeyFromRegistry() protected method

Grab the key from the registry.

protected ReadKeyFromRegistry ( ) : string
return	string

SetParameters() public static method

Set the parameters used to validate licenses created by this provider.

This must be called by the client software prior to obtaining licenses using the EncryptedLicenseProvider. The parameters are generated using the Infralution License Key Generator and pasted into the calling client code.

public static SetParameters ( string licenseParameters ) : void
licenseParameters	string	An XML string containing parameters used to validate licenses
return	void

ValidateLicenseKey() public method

Validate that the given license key is valid for the current licensing parameters

This method provides a mechanism to validate that a given license key is valid prior to attempting to install it. This can be useful if you want to check the EncryptedLicense.ProductInfo before installing the license. You must call SetParameters before using this method.

public ValidateLicenseKey ( string licenseKey ) : EncryptedLicense
licenseKey	string	The license key to validate
return	EncryptedLicense