OnlineUnlockStatus Class Referenceabstract

A base class for online unlocking systems. More...

Inheritance diagram for OnlineUnlockStatus:

Classes

struct  MachineIDUtilities
 This class contains some utility functions that might help with machine ID generation. More...
 
struct  UnlockResult
 This provides some details about the reply that the server gave in a call to attemptWebserverUnlock(). More...
 

Public Member Functions

 OnlineUnlockStatus ()
 
virtual ~OnlineUnlockStatus ()
 Destructor. More...
 
virtual String getProductID ()=0
 This must return your product's ID, as allocated by the store. More...
 
virtual bool doesProductIDMatch (const String &returnedIDFromServer)=0
 This must check whether a product ID string that the server returned is OK for unlocking the current app. More...
 
virtual RSAKey getPublicKey ()=0
 This must return the RSA public key for authenticating responses from the server for this app. More...
 
virtual void saveState (const String &)=0
 This method must store the given string somewhere in your app's persistent properties, so it can be retrieved later by getState(). More...
 
virtual String getState ()=0
 This method must retrieve the last state that was provided by the saveState method. More...
 
virtual String getWebsiteName ()=0
 Returns the name of the web-store website, not for communication, but for presenting to the user. More...
 
virtual URL getServerAuthenticationURL ()=0
 Returns the URL of the authentication API. More...
 
virtual String readReplyFromWebserver (const String &email, const String &password)=0
 Subclasses that talk to a particular web-store will implement this method to contact their webserver and attempt to unlock the current machine for the given username and password. More...
 
virtual StringArray getLocalMachineIDs ()
 Returns a list of strings, any of which should be unique to this physical computer. More...
 
var isUnlocked () const
 Returns true if the product has been successfully authorised for this machine. More...
 
Time getExpiryTime () const
 Returns the Time when the keyfile expires. More...
 
void setUserEmail (const String &usernameOrEmail)
 Optionally allows the app to provide the user's email address if it is known. More...
 
String getUserEmail () const
 Returns the user's email address if known. More...
 
bool applyKeyFile (String keyFileContent)
 Attempts to perform an unlock using a block of key-file data provided. More...
 
UnlockResult attemptWebserverUnlock (const String &email, const String &password)
 Contacts the webserver and attempts to perform a registration with the given user details. More...
 
void load ()
 Attempts to load the status from the state retrieved by getState(). More...
 
void save ()
 Triggers a call to saveState which you can use to store the current unlock status in your app's settings. More...
 

Detailed Description

A base class for online unlocking systems.

This class stores information about whether your app has been unlocked for the current machine, and handles communication with a web-store to perform the unlock procedure.

You probably won't ever use this base class directly, but rather a store-specific subclass such as TracktionMarketplaceStatus, which knows how to talk to the particular online store that you're using.

To use it, you create a subclass which implements all the pure virtual methods (see their comments to find out what you'll need to make them do).

Then you can create an instance of your subclass which will hold the registration state. Typically, you'll want to just keep a single instance of the class around for the duration of your app. You can then call its methods to handle the various registration tasks.

Areas of your code that need to know whether the user is registered (e.g. to decide whether a particular feature is available) should call isUnlocked() to find out.

If you want to create a GUI that allows your users to enter their details and register, see the OnlineUnlockForm class.

See also
OnlineUnlockForm, KeyGeneration

Constructor & Destructor Documentation

◆ OnlineUnlockStatus()

OnlineUnlockStatus::OnlineUnlockStatus ( )

◆ ~OnlineUnlockStatus()

virtual OnlineUnlockStatus::~OnlineUnlockStatus ( )
virtual

Destructor.

Member Function Documentation

◆ getProductID()

virtual String OnlineUnlockStatus::getProductID ( )
pure virtual

This must return your product's ID, as allocated by the store.

◆ doesProductIDMatch()

virtual bool OnlineUnlockStatus::doesProductIDMatch ( const String returnedIDFromServer)
pure virtual

This must check whether a product ID string that the server returned is OK for unlocking the current app.

Implemented in TracktionMarketplaceStatus.

◆ getPublicKey()

virtual RSAKey OnlineUnlockStatus::getPublicKey ( )
pure virtual

This must return the RSA public key for authenticating responses from the server for this app.

You can get this key from your marketplace account page.

◆ saveState()

virtual void OnlineUnlockStatus::saveState ( const String )
pure virtual

This method must store the given string somewhere in your app's persistent properties, so it can be retrieved later by getState().

◆ getState()

virtual String OnlineUnlockStatus::getState ( )
pure virtual

This method must retrieve the last state that was provided by the saveState method.

On first-run, it should just return an empty string.

◆ getWebsiteName()

virtual String OnlineUnlockStatus::getWebsiteName ( )
pure virtual

Returns the name of the web-store website, not for communication, but for presenting to the user.

Implemented in TracktionMarketplaceStatus.

◆ getServerAuthenticationURL()

virtual URL OnlineUnlockStatus::getServerAuthenticationURL ( )
pure virtual

Returns the URL of the authentication API.

Implemented in TracktionMarketplaceStatus.

◆ readReplyFromWebserver()

virtual String OnlineUnlockStatus::readReplyFromWebserver ( const String email,
const String password 
)
pure virtual

Subclasses that talk to a particular web-store will implement this method to contact their webserver and attempt to unlock the current machine for the given username and password.

The return value is the XML text from the server which contains error information and/or the encrypted keyfile.

Implemented in TracktionMarketplaceStatus.

◆ getLocalMachineIDs()

virtual StringArray OnlineUnlockStatus::getLocalMachineIDs ( )
virtual

Returns a list of strings, any of which should be unique to this physical computer.

When testing whether the user is allowed to use the product on this machine, this list of tokens is compared to the ones that were stored on the webserver.

The default implementation of this method will simply call MachineIDUtilities::getLocalMachineIDs(), which provides a default version of this functionality.

◆ isUnlocked()

var OnlineUnlockStatus::isUnlocked ( ) const

Returns true if the product has been successfully authorised for this machine.

The reason it returns a variant rather than a bool is just to make it marginally more tedious for crackers to work around. Hopefully if this method gets inlined they'll need to hack all the places where you call it, rather than just the function itself.

Bear in mind that each place where you check this return value will need to be changed by a cracker in order to unlock your app, so the more places you call this method, the more hassle it will be for them to find and crack them all.

◆ getExpiryTime()

Time OnlineUnlockStatus::getExpiryTime ( ) const

Returns the Time when the keyfile expires.

If a the key file obtained has an expiry time, isUnlocked will return false and this will return a non-zero time. The interpretation of this is up to your app but could be used for subscription based models or trial periods.

◆ setUserEmail()

void OnlineUnlockStatus::setUserEmail ( const String usernameOrEmail)

Optionally allows the app to provide the user's email address if it is known.

You don't need to call this, but if you do it may save the user typing it in.

◆ getUserEmail()

String OnlineUnlockStatus::getUserEmail ( ) const

Returns the user's email address if known.

◆ applyKeyFile()

bool OnlineUnlockStatus::applyKeyFile ( String  keyFileContent)

Attempts to perform an unlock using a block of key-file data provided.

You may wish to use this as a way of allowing a user to unlock your app by drag-and-dropping a file containing the key data, or by letting them select such a file. This is often needed for allowing registration on machines without internet access.

◆ attemptWebserverUnlock()

UnlockResult OnlineUnlockStatus::attemptWebserverUnlock ( const String email,
const String password 
)

Contacts the webserver and attempts to perform a registration with the given user details.

The return value will either be a success, or a failure with an error message from the server, so you should show this message to your user.

Because this method blocks while it contacts the server, you must run it on a background thread, not on the message thread. For an easier way to create a GUI to do the unlocking, see OnlineUnlockForm.

◆ load()

void OnlineUnlockStatus::load ( )

Attempts to load the status from the state retrieved by getState().

Call this somewhere in your app's startup code.

◆ save()

void OnlineUnlockStatus::save ( )

Triggers a call to saveState which you can use to store the current unlock status in your app's settings.


The documentation for this class was generated from the following file: