Version 1.2 Available

Protect Your Software with Professional Licensing

LIMAN SDK is a lightweight, cross-platform software licensing library with strong cryptography. No external dependencies, just drop it into your C/C++ project.

Download SDK Get Started

Why LIMAN SDK?

Everything you need to protect your software and manage licenses effectively.

🔒

Strong Cryptography

RSA signatures with SHA-256 hashing make your licenses virtually unforgeable.

💻

Cross-Platform

Native support for Windows, Linux, and macOS in 64-bit. Windows also supports 32-bit.

📅

Expiring Licenses

Issue time-limited licenses for subscriptions, trials, or maintenance periods.

🔗

Node-Locked

Bind licenses to specific hardware using MAC, CPU, disk ID, or hostname.

⏰

Clock Tamper Detection

Detect system clock manipulation to prevent license expiry circumvention.

📦

Zero Dependencies

Static library with no external dependencies. Just link and go.

Simple Integration

Add license verification to your application in minutes.

#include "liman.h"

int main() {
    int err;

    // Create environment with your chosen key size
    pLIMENV env = lim_create_env(2048, 256, &err);

    // Load and verify license
    pLIMLIC lic = lim_create_lic_fromfile(env, "license.key", &err);

    if (lim_is_verified(lic) && lim_assert_valid(lic) == LIM_OK) {
        printf("License valid! Days remaining: %d\n",
               lim_days_to_expiry(lic));
    }

    lim_free_lic(&lic);
    lim_free_env(&env);
    return 0;
}