Package rs.baselib.licensing

Helper methods for licensing products.

The classes generate and verify license strings using a public/private key pair which clients must provide to these classes.

A license consist of a product ID which clients interprete themselves, validity date and a license holder string. Latter is again subject to clients to define.

A license is generated using the private key which must be kept secret and shall never be distributed to license holders or with applications. The LicenseGenerator is responsible for creating such licenses. The LicenseManager verifies the license using the public key of your key pair. This public key can be safely distributed with applications to license holders.

This package does not provide any other infrastructure than this simple classes. Licenses in general look like 8-character blocks, separated by dash characters. The number of blocks is determined by the size of the license holder string. The general rule is that 5 character (to be precise: bytes!) form an 8-character block in the license. The first block is reserved for meta-data (product ID and validity date).

This package is experimental yet. Usage is described on Class Usage Page

Author:

ralph

Interface Summary

Interface	Description
ILicense	The interface a license has to fulfill.
ILicenseContext	A container holding properties for creation and verification of licenses.
ILicenseCreator	Internal interface for implementations of license generators.
ILicenseVerifier	Internal interface for implementations of license generators.
ILicensingScheme	Describes a licensing scheme.

Class Summary

Class	Description
AbstractLicense	Abstract implementation of a license.
DefaultLicense	Default implementation of a license.
DefaultLicenseContext	Default implementation of an ILicenseContext.
KeyGen	A RSA Key Generator.
LicenseGenerator	The generator for license.
LicenseManager	The Key Manager, responsible to verify licenses.
LicGen	A universal generator for creating RSA licenses.
SimpleLicense	A limited, simple implementation of a license.

Enum Summary

Enum	Description
LicensingScheme	Describes the alternative ways to produce a license key.

Exception Summary

Exception	Description
LicenseException	A License problem.