Unofficial Keygen Rust SDK

The keygen-rs crate is an unofficial Rust SDK for integrating with the keygen.sh licensing service.

Features

• License Management: Validate, activate, and verify licenses offline
• Machine Management: Activate, deactivate, and manage machines
• Administrative APIs: Full CRUD operations for products, policies, licenses, users, and tokens (requires admin token)
• Offline Verification: Verify signed license keys without internet connectivity
• Type Safety: Strongly-typed enums for all API options
• Service Introspection: Check API availability and feature support

Sponsored by

Keymana is a desktop interface for Keygen.sh that eliminates API calls, offering intuitive license management with multi-account support, advanced filtering, and compatibility with both cloud and self-hosted instances.

Installing

Add this to your Cargo.toml:

[dependencies]
keygen-rs = "0.7"

Feature Flags

The SDK uses feature flags to minimize binary size:

• license-key (default): End-user features for license validation and machine activation
• token: Administrative features requiring token authentication

# For end-user features only (default)
keygen-rs = "0.7"

# For administrative features
keygen-rs = { version = "0.7", features = ["token"] }

# For both end-user and administrative features
keygen-rs = { version = "0.7", features = ["license-key", "token"] }

Tauri Plugin

Tauri plugins for this SDK are available:

• tauri-plugin-keygen-rs for Tauri v1
• tauri-plugin-keygen-rs2 for Tauri v2

These plugins provide an easy way to integrate Keygen licensing into your Tauri applications. For more information, check the plugins' respective READMEs.

Config

KeygenConfig

Use KeygenConfig to configure the SDK globally. You should set this before making any API calls.

For End Users (License Key Authentication)

use keygen_rs::config::{self, KeygenConfig};

config::set_config(KeygenConfig::license_key(
    "YOUR_KEYGEN_ACCOUNT_ID",
    "YOUR_KEYGEN_PRODUCT_ID", 
    "A_KEYGEN_LICENSE_KEY",
    Some("YOUR_KEYGEN_PUBLIC_KEY"),
));

For Administrators (Token Authentication)

use keygen_rs::config::{self, KeygenConfig};

config::set_config(KeygenConfig::admin(
    "YOUR_KEYGEN_ACCOUNT_ID",
    "YOUR_ADMIN_TOKEN",
));

Custom Configuration

use keygen_rs::config::{self, KeygenConfig};

config::set_config(KeygenConfig {
    api_url: "https://api.keygen.sh".to_string(), // or your custom domain
    account: "YOUR_KEYGEN_ACCOUNT_ID".to_string(),
    product: "YOUR_KEYGEN_PRODUCT_ID".to_string(),
    license_key: Some("A_KEYGEN_LICENSE_KEY".to_string()),
    token: Some("YOUR_ADMIN_TOKEN".to_string()),
    public_key: Some("YOUR_KEYGEN_PUBLIC_KEY".to_string()),
    ..KeygenConfig::default()
});

Usage

Validate a License

To validate a license, configure KeygenConfig with your Keygen account details. Then call the validate function with a device fingerprint:

use keygen_rs::{config::{self, KeygenConfig}, errors::Error};

#[tokio::main]
async fn main() -> Result<(), Error> {
    config::set_config(KeygenConfig::license_key(
        "YOUR_KEYGEN_ACCOUNT_ID",
        "YOUR_KEYGEN_PRODUCT_ID",
        "A_KEYGEN_LICENSE_KEY",
        Some("YOUR_KEYGEN_PUBLIC_KEY"),
    ));

    let fingerprint = machine_uid::get().unwrap_or("".into());
    let license = keygen_rs::validate(&[fingerprint]).await?;
    println!("License validated successfully: {:?}", license);

    Ok(())
}

Activate a Machine

To activate a machine for a license:

use keygen_rs::{
    config::{self, KeygenConfig},
    errors::Error,
};

#[tokio::main]
async fn main() -> Result<(), Error> {
    config::set_config(KeygenConfig::license_key(
        "YOUR_KEYGEN_ACCOUNT_ID",
        "YOUR_KEYGEN_PRODUCT_ID",
        "A_KEYGEN_LICENSE_KEY",
        Some("YOUR_KEYGEN_PUBLIC_KEY"),
    ));

    let fingerprint = machine_uid::get().unwrap_or("".into());
    if let Err(err) = keygen_rs::validate(&[fingerprint.clone()]).await {
        match err {
            Error::LicenseNotActivated { license, .. } => {
                let machine = license.activate(&fingerprint, &[]).await?;
                println!("License activated successfully: {:?}", machine);
            }
            _ => {
                println!("License validation failed: {:?}", err);
            }
        }
    } else {
        println!("License validated successfully");
    }

    Ok(())
}

Offline License Key Verification

To verify a signed license key offline:

use keygen_rs::{config::{self, KeygenConfig}, license::SchemeCode};

fn main() {
    config::set_config(KeygenConfig::license_key(
        "YOUR_KEYGEN_ACCOUNT_ID",
        "YOUR_KEYGEN_PRODUCT_ID",
        "A_KEYGEN_LICENSE_KEY",
        Some("YOUR_KEYGEN_PUBLIC_KEY"),
    ));

    let signed_key = "YOUR_SIGNED_LICENSE_KEY";
    if let Ok(data) = keygen_rs::verify(SchemeCode::Ed25519Sign, signed_key) {
        println!("License verified: {:?}", String::from_utf8_lossy(&data));
    } else {
        println!("License verification failed");
    }
}

Error Handling

The SDK returns meaningful errors which can be handled in your integration. Here's an example of handling a LicenseNotActivated error:

use keygen_rs::{config::{self, KeygenConfig}, errors::Error};

#[tokio::main]
async fn main() -> Result<(), Error> {
    config::set_config(KeygenConfig::license_key(
        "YOUR_KEYGEN_ACCOUNT_ID",
        "YOUR_KEYGEN_PRODUCT_ID",
        "A_KEYGEN_LICENSE_KEY",
        Some("YOUR_KEYGEN_PUBLIC_KEY"),
    ));

    let fingerprint = machine_uid::get().unwrap_or("".into());
    match keygen_rs::validate(&[fingerprint.clone()]).await {
        Ok(license) => println!("License is valid: {:?}", license),
        Err(Error::LicenseNotActivated { license, .. }) => {
            println!("License is not activated. Activating...");
            let machine = license.activate(&fingerprint, &[]).await?;
            println!("Machine activated: {:?}", machine);
        },
        Err(e) => println!("Error: {:?}", e),
    }

    Ok(())
}

Administrative APIs

When configured with a token, you can access administrative features:

Product Management

use keygen_rs::product::{Product, CreateProductRequest, DistributionStrategy};

#[tokio::main]
async fn main() -> Result<(), Error> {
    // Create a new product
    let product = Product::create(CreateProductRequest {
        name: "My App".to_string(),
        distribution_strategy: Some(DistributionStrategy::Licensed),
        platforms: Some(vec![Platform::MacOs, Platform::Windows]),
        ..Default::default()
    }).await?;

    // List all products
    let products = Product::list(None).await?;
    
    Ok(())
}

Policy Management

use keygen_rs::policy::{Policy, CreatePolicyRequest, AuthenticationStrategy};

#[tokio::main]
async fn main() -> Result<(), Error> {
    // Create a new policy
    let policy = Policy::create(CreatePolicyRequest {
        name: "Standard License".to_string(),
        authentication_strategy: Some(AuthenticationStrategy::License),
        duration: Some(365), // days
        max_machines: Some(3),
        ..Default::default()
    }).await?;
    
    Ok(())
}

License Management

use keygen_rs::license::{License, CreateLicenseRequest};

#[tokio::main]
async fn main() -> Result<(), Error> {
    // Create a new license
    let license = License::create(CreateLicenseRequest {
        policy_id: "POLICY_ID".to_string(),
        user_email: Some("user@example.com".to_string()),
        ..Default::default()
    }).await?;
    
    // Suspend a license
    license.suspend().await?;
    
    // Reinstate a license
    license.reinstate().await?;
    
    Ok(())
}

Service Introspection

use keygen_rs::service;

#[tokio::main]
async fn main() -> Result<(), Error> {
    // Check if the service is available
    service::ping().await?;
    
    // Get detailed service information
    let info = service::get_service_info().await?;
    println!("API Version: {}", info.api_version);
    
    // Check if a specific feature is supported
    if service::supports_product_code().await? {
        println!("Product codes are supported!");
    }
    
    Ok(())
}

Examples

For more detailed examples, please refer to the examples directory in the repository:

• License Examples: /examples/license/ - License validation, activation, and management
• Machine Examples: /examples/machine/ - Machine activation and management
• Product Examples: /examples/product/ - Product CRUD operations (admin only)
• Policy Examples: /examples/policy/ - Policy management (admin only)
• User Examples: /examples/user/ - User management (admin only)
• Token Examples: /examples/token/ - Token management (admin only)
• Configuration Examples: /examples/config_examples.rs - Different configuration approaches
• Service Info: /examples/service_info.rs - Service introspection

Testing

When implementing a testing strategy for your licensing integration, we recommend mocking the Keygen API responses. This is especially important for CI/CD environments to prevent unnecessary load on Keygen's servers and to stay within your account's daily request limits. You can use crates like mockito or wiremock to mock HTTP responses in your tests.

Inspired by

• keygen-go
• tauri-plugin-keygen

License

This project is licensed under the MIT License.