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2026-05-07 10:40:53 -05:00

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Rust

//! Minimum-viable license check, entirely offline.
//!
//! Run with:
//!
//! cargo run --example offline_verify --no-default-features --features offline -- <LIC1-...>
//!
//! In real life you'd embed the public key with `include_str!` — here we
//! read it from an env var so the example has zero build-time coupling.
use licensing_client::{PublicKeyPem, Verifier};
use std::env;
fn main() {
let pem = env::var("LICENSING_PUBKEY_PEM").expect("set LICENSING_PUBKEY_PEM to your issuer's public key");
let key = env::args()
.nth(1)
.expect("pass a license key as the first argument");
let verifier = Verifier::new(PublicKeyPem::from_str(&pem).expect("parse pubkey"));
match verifier.verify(&key) {
Ok(ok) => {
println!("license OK");
println!(" license_id = {}", ok.license_id);
println!(" product_id = {}", ok.product_id);
println!(" issued_at = {}", ok.payload.issued_at);
}
Err(e) => {
eprintln!("license REJECTED: {e}");
std::process::exit(1);
}
}
}