Licensing for cross-platform applications made with Python, PHP, and JavaScript

Licensing platform independent
applications with Python, PHP,
and JavaScript
Ruediger Kuegler, VP Sales & Professional Services
ruediger.kuegler@wibu.com
Joerg Jans, Professional Services
joerg.jans@wibu.com
Python, PHP & JavaScript
2019-06-27 © WIBU-SYSTEMS AG 2019 - Licensing for cross-platform applications with Python, PHP, and Javascript 1

Use Cases
Web Applications with HTML 5,
CSS3, and JavaScript

Web Applications with HTML 5, CSS3, and JavaScript
 Mobile applications for all types of devices (PCs, mobile devices, tablets)
 Current application always available, no outdated local version on the
user's PC
 No updates necessary for the user
 No administrator rights necessary for the user, only browser required
 Development tools are getting better and better

Licensing Scenario I
 Scenario
 A software publisher develops a product in the form of a web application
 The software publisher sells this complete package (server and clients) to one or
more service providers
 Each service provider resells the web application to their users and generates
revenue
 Requirement
 The software publisher wants to check that the service providers use the web
application within the agreed license terms (number of servers, number of users,
functionality, time license, ...)

Licensing Scenario II
 Scenario
 A service provider develops a web application
 The application runs on a server operated by the service provider (own data center,
Azure, AWS, ...)
 The service provider sells the web application to their users and generates revenue
 Requirement
 The service provider wants to control the use that their users make of the web
application (number of users, functionality, time license, ...)

Licensing Scenario III
 Scenario
 A software publisher develops a product in the form of a web application
 This web application is delivered to the users and runs locally on their system, for
example:
 As a local desktop application
 On a delivered controller / embedded device
 Requirement
 The software publisher wants to control the use that the users make of the
application
 Ability to enable additional functions for the users

Licensing Scenario IV
 Scenario
 A software publisher is already selling a desktop application
 In the future, some functionality will also be offered via a mobile application (i.g. at a
construction site)
 Such functionality requires a server application. This is offered as a service by the
software publisher, but can also be operated by the users themselves
 Requirement
 The software publisher wants to control the use that their users make of the web
application (number of servers, number of users, functionality, time license, ...)

Use Cases
Node.js Applications

Node.js Applications
 JavaScript runtime environment
 Platform for network applications or web server
 Optimized for performance and resource saving
 Event-driven architecture
 I/O operations are not blocked
 Single threads per operation
 Well suited for real-time applications
 Modular architecture

Licensing Scenario V
 Scenario
 A service provider develops a web application with node.js (server)
 The application runs on a server operated by the service provider (own data center,
Azure, AWS, ...)
 The service provider sells the web application to their users and generates revenue
 Requirement
 The service provider wants to control the use that their users make of the

Use Cases
Desktop Applications with Electron

Desktop Applications with Electron
 Runtime for desktop applications with JavaScript / HTML5 / CSS
 Open Source
 Uses node.js and Chromium
 Uniform source code for all target platforms
 No platform-specific languages (C#, Objective-C, ...)
 Source code from existing web application reusable
 Native applications for target platforms

Licensing Scenario VI
 Scenario
 A software publisher creates a desktop application with Electron
 Requirement
 The software publisher wants to control the use that their users make of the desktop

Use Cases
Python Applications

Python Applications
 Fast and easy programming
 Cross-platform support
 Large community (documentation, extensions, examples)
 Server and desktop applications
 C-based extensions possible
 Widely used in embedded systems
 Conversion into more executable files possible (Cython)

Licensing Scenario VII
 Scenario
 A software publisher creates a desktop application with Python
 Requirement
 The software publisher wants to control the use that their users make of the desktop
application (license, functionality, time license, ...)

Technical Solutions
CodeMeter Overview

Delivery to the end user
Integration into processes
Integrate once – Deliver again and again …
Integration into the software
Software Software
CodeMeter
Protection Suite
Integate once Deliver again and again
ERP/CRM
e-commerce
Software
License portal
License
Central
License
Central

CodeMeter Licensing System
CmDongle
Hardware-based
Security
License Server
License server
in LAN / WAN
CmCloudContainer
User-bound
license in the cloud
CmActLicense
Target bound
license file
Universal
Firm Code

Technical Solutions
CodeMeter Protection Suite

Automatic license checks
Individual license check
Automatic IP protection
Anti-debug methods
CodeMeter variant used
Encryption of individual functions
Integrity protection
Native Code
CodeMeter Runtime
IxProtector
AxProtector
AxProtector
IP Protection
IxProtector
IP Protection
Java.NET
CodeMeter Runtime CodeMeter RuntimeCodeMeter Embedded
AxProtector .NET AxProtector Java
AxProtector CmE
IxProtector CmE
Windows, macOS,
Linux
Windows, macOS,
Linux, Android
Android, Linux Java SE, Java EE
.NET Framework,
.NET Standard

 Mainly used for desktop applications
 Requires conversion to application (exe) or library (dll, so)
 Cython, Electron
 Automatic integration of licensing calls
 Automatic protection against reverse engineering
 Automatic protection of the IP

Technical Solutions
CodeMeter Core API

CodeMeter Core API
// Allocate license
CmAccess2(…)
// Encrypt using license
CmCyrpt2(…)
// Retrieve license information
CmGetInfo(…)
// Release license
CmRelease(…)
// Error handling
CmGetLastErrorCode(…)
// Create license request
CmGetRemoteContextBuffer(…)
// Import license update
CmExecuteRemoteUpdate(…)

CodeMeter Core API
 Prerequisite: Calling a C API (.NET-API / Java-API)
 Python, node.js
 Integration of simple queries (CmAccess2)
 Integration of encryption methods: Encrypted Data in Source – EDIS
(CmCrypt2)
 Reading license information
 Requires a local CodeMeter Runtime installation

Technical Solutions
CodeMeter Cloud Lite API

// List all available licenses
// and all Product Items
GetContents(…)
// Allocate license
Access(…)
// List all Product Items
// of allocated license
GetContensForHandle(…)
// Send “Keep-Alive” signal
Revalidate(…)
// Release license
Release(…)

 Available as SOAP and REST API
 JavaScript, Python, and PHP
 Simple license queries
 API based on CodeMeter Core API, but including specificities like
 Lifespan
 “Keep Alive”

Best Practice Solutions
& Demo
Python and CodeMeter Core API

 CodeMeter Core API calls in application
 Wrapper module for C library
 Check return values of CmAccess2 and CmCrypt2

import CodeMeter
class License:
def __init__(self, productcode):
self.pc = productcode
def getError(self):
return CodeMeter.CmGetLastErrorCode()
…

…
def check(self):
cmacc = CodeMeter.CMACCESS2()
cmacc.mulFirmCode = 6000010
cmacc.mulProductCode = self.pc
cmacc.mflCtrl = CodeMeter.CM_ACCESS_STATIONSHARE
flCtrl = CodeMeter.CM_ACCESS_LOCAL_LAN
hcmse = CodeMeter.CmAccess2(flCtrl, cmacc)
if hcmse == 0:
return False
…

…
cmcrypt = CodeMeter.CMCRYPT2()
Data = CodeMeter.c_ubyte*16
data = Data(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0)
result = CodeMeter.CmCrypt2(hcmse, 0, cmcrypt, data, 16)
CodeMeter.CmRelease(hcmse)
if result != 16:
return False
# TODO: check data in detail
return True

& Demo
Python and

Python and CodeMeter Protection Suite
 Compilation as extension with Cython
 pyd: Library in the native format of the target system
 Starts with _launcher.py script
 Encryption with CodeMeter Protection Suite
 Choice of extensions (combination encrypted / non-encrypted possible)

& Demo
PHP and CodeMeter Cloud Lite

 CodeMeter Cloud Lite calls in PHP code
 SOAP or REST
 Binding licenses to the user account
 Existing user management
 OAuth2 provider (e.g. Facebook)
 …
 Checking license options (entryinfo) if required
 License doesn’t stay allocated in our sample

PHP and CodeMeter Cloud Lite (Source Code)
function checkLicense($user, $productCode)
{
$accessInformation = array(
"firmCode" => 6000010,
"productCode" => $productCode,
"featureCode" => 0,
"shareDevice" => false,
"productItemReference" => 0,
);
$access = CloudLite_Access($user, $accessInformation, 120);
…

…
if (!$access)
{
return null;
}
…
$handle = $access->return->handle;
if ($handle == 0)
{
return null;
}
…

…
$entryinfo = CloudLite_GetContentsForHandle($user, $handle);
$release = CloudLite_Release($user, $handle);
return $entryinfo;
}

& Demo
Electron and

Electron and CodeMeter Protection Suite
 Package (Windows) contains
 Application (without Intellectual Property)
 Folder with *.js files, *.html files, *.css files
 Integration (Windows)
 Encryption of Application with activated FileEncryption
 Encryption of data files

Electron and CodeMeter Protection Suite (Exe)
[WIBU-SYSTEMS Control File]
Guid={00090000-0000-1100-8005-0000C06B5161}
…
…
-cad0
-cas0
-cav
…
…
-o:"Protectedwebinar.exe"
"Unprotectedwebinar.exe"

Electron and CodeMeter Protection Suite (Data)
[WIBU-SYSTEMS Control File]
Guid={00090000-0000-1100-8005-0000C06B5161}
…
…
-cdc
…
…
-o:"Protectedresourcesappmain.js"
"Unprotectedresourcesappmain.js"

Electron and CodeMeter Protection Suite (Encrypted *.js File)

https://www.wibu.com
info@wibu.com
Europe: +49-721-931720
USA: +1-425-7756900
China: +86-21-55661790
Japan: +81-3-43608205
Many thanks for your attention!

Licensing for cross-platform applications made with Python, PHP, and JavaScript

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