It is now possible to integrate your FastSpring store with Cryptolens. This integration allows you to automatically issue licenses to your customers upon a successful payment in your FastSpring store. You can read more on how to get started in the following tutorial.
Today we have released a library that you can use to implement license key verification for applications written in Rust. The library is freely available on GitHub.
To verify a license, you can use the code similar to the one below. More information about the parameters can be found here.
use cryptolens;
fn main() {
let license_key = cryptolens::KeyActivate(
"WyI0NjUiLCJBWTBGTlQwZm9WV0FyVnZzMEV1Mm9LOHJmRDZ1SjF0Vk52WTU0VzB2Il0=",
cryptolens::KeyActivateArguments {
ProductId: 3646,
Key: "MPDWY-PQAOW-FKSCH-SGAAU",
MachineCode: "289jf2afs3",
.. Default::default()
}
).unwrap();
let public_key = r#"<RSAKeyValue><Modulus>khbyu3/vAEBHi339fTuo2nUaQgSTBj0jvpt5xnLTTF35FLkGI+5Z3wiKfnvQiCLf+5s4r8JB/Uic/i6/iNjPMILlFeE0N6XZ+2pkgwRkfMOcx6eoewypTPUoPpzuAINJxJRpHym3V6ZJZ1UfYvzRcQBD/lBeAYrvhpCwukQMkGushKsOS6U+d+2C9ZNeP+U+uwuv/xu8YBCBAgGb8YdNojcGzM4SbCtwvJ0fuOfmCWZvUoiumfE4x7rAhp1pa9OEbUe0a5HL+1v7+JLBgkNZ7Z2biiHaM6za7GjHCXU8rojatEQER+MpgDuQV3ZPx8RKRdiJgPnz9ApBHFYDHLDzDw==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>"#;
match license_key.has_valid_signature(public_key) {
Ok(true) => { }
_ => { println!("Signature check failed. Aborting!"); return; }
}
println!("Successfully activated license key: {}", license_key.Key.unwrap());
}As always, let us know should you have any questions!
Autodesk® Revit is a powerful building information software, which allows developers to extend its functionality through plug-ins that can be written in either Python or .NET. In order to monetize your plugin, we need to implement a license verification mechanism and a way to accept payments from prospective customers.
If your plugin is written in Python, you can use the Python2 version of our Python client. A simple license verification can be performed with the code below (your specific parameters can be found here):
from cryptolens_python2 import *
HelperMethods.ironpython2730_legacy = True
pubKey = "<RSAKeyValue><Modulus>sGbvxwdlDbqFXOMlVUnAF5ew0t0WpPW7rFpI5jHQOFkht/326dvh7t74RYeMpjy357NljouhpTLA3a6idnn4j6c3jmPWBkjZndGsPL4Bqm+fwE48nKpGPjkj4q/yzT4tHXBTyvaBjA8bVoCTnu+LiC4XEaLZRThGzIn5KQXKCigg6tQRy0GXE13XYFVz/x1mjFbT9/7dS8p85n8BuwlY5JvuBIQkKhuCNFfrUxBWyu87CFnXWjIupCD2VO/GbxaCvzrRjLZjAngLCMtZbYBALksqGPgTUN7ZM24XbPWyLtKPaXF2i4XRR9u6eTj5BfnLbKAU5PIVfjIS+vNYYogteQ==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>"
res = Key.activate(token="WyIyNTU1IiwiRjdZZTB4RmtuTVcrQlNqcSszbmFMMHB3aWFJTlBsWW1Mbm9raVFyRyJd",\
rsa_pub_key=pubKey,\
product_id=3349, key="ICVLD-VVSZR-ZTICT-YKGXL", \
machine_code=Helpers.GetMachineCode())
if res[0] == None or not Helpers.IsOnRightMachine(res[0]):
print("An error occurred: {0}".format(res[1]))
else:
print("Success")
license_key = res[0]
print("Feature 1: " + str(license_key.f1))
print("License expires: " + str(license_key.expires))If your plugin is either written in C# or VB.NET, you can use our .NET library instead. To add it to your project in Visual Studio:
One way to sell an Autodesk Revit plug-ins is by publishing them in the Autodesk App Store, where a basic licensing mechanism is already provided. The problem with this approach is that the licensing models available are quite limited (eg. you can only charge your customers once for the plug-in and they will be able to use it in perpetuity). For instance, selling your plug-in as a service (subscription model) is not supported.
A better approach is to still publish your plug-in in the Autodesk App Store and set it to be a free app. You can then ask your customers to get a separate license key to be able to unlock all features.
You can read more about various ways of selling your software in our help pages. I would also recommend to check out the available licensing models.
If you have any questions, please feel free to reach out!
Python can be used to develop a variety of applications, either as plugins (eg. for Discord, AutoCAD, Autodesk Maya, etc) or standalone applications. In this post we will focus on how to monetize a standalone Python application.
Let’s say you have developed a Python application that classifies images (eg. using tensorflow or pytorch). To start selling it, there are just three things we need in place:
To obfuscate your application, multiple tools can be used. You can either use packages such as pyarmor that are made to obfuscate Python code or open source tools such as pyinstaller in combination with cpython (for most sensitive code).
A license key can be easily verified using the code below. You can find more information about the parameters here.
from licensing.helpers import Helpers
from licensing.models import Response, RSAPublicKey
from licensing.methods import Key
pubKey = "<RSAKeyValue><Modulus>sGbvxwdlDbqFXOMlVUnAF5ew0t0WpPW7rFpI5jHQOFkht/326dvh7t74RYeMpjy357NljouhpTLA3a6idnn4j6c3jmPWBkjZndGsPL4Bqm+fwE48nKpGPjkj4q/yzT4tHXBTyvaBjA8bVoCTnu+LiC4XEaLZRThGzIn5KQXKCigg6tQRy0GXE13XYFVz/x1mjFbT9/7dS8p85n8BuwlY5JvuBIQkKhuCNFfrUxBWyu87CFnXWjIupCD2VO/GbxaCvzrRjLZjAngLCMtZbYBALksqGPgTUN7ZM24XbPWyLtKPaXF2i4XRR9u6eTj5BfnLbKAU5PIVfjIS+vNYYogteQ==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>"
res = Key.activate(token="WyIyNTU1IiwiRjdZZTB4RmtuTVcrQlNqcSszbmFMMHB3aWFJTlBsWW1Mbm9raVFyRyJd",\
rsa_pub_key=pubKey,\
product_id=3349, key="ICVLD-VVSZR-ZTICT-YKGXL", machine_code="test")
if res[0] == None:
print("An error occured: {0}".format(res[1]))
else:
print("Success")When you have obfuscation and license verification in place, we need a way for customers to be able to order a license key. If you already have Stripe, you can use the recurring billing module, which acts like an interface for plans defined in your Stripe account. In other cases, you can either use payment forms or a different platform (please read more here).
Questions? Please reach out to us at [email protected] 🙂