Rust

Verify JWT Using an RSA Public Key (RS256, RS384, RS512)

See more JSON Web Token (JWT) Examples

Demonstrates how to verify a JWT that was signed using an RSA private key.

This example verifies the RSA signature. It also does the following:

• Checks to see if the time constraints ("nbf" and "exp") are valid.
• Recovers the original JOSE header.
• Recovers the original claims JSON.

Rust

// Demonstrates how to verify an JWT using an RSA public key.

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let pub_key = chilkat::PublicKey::new();
let _ = pub_key.load_from_file("qa_data/pem/rsa_public.pem").is_ok();

let jwt = chilkat::Jwt::new();

let token = "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNDYzNDQ1MjM4LCJuYmYiOjE0NjM0NDUyMzgsImV4cCI6MTQ2MzQ0ODgzOH0.XRtqed6nuJ9lrp0wbNdDX3fCkSh_d9cHAniPbNcqm7G-5N3mtI5ntQvZBDP3pHtECVqufuDwW7XgUtzAi0ZXhyiRm1iZ3wMSN5lHWv52OQJmMHPA7VPd8Q1hDG-tx-QswzJKd75OEUHP7wIXq2Mg_YVElfDvJI6TGjGyS1y-RLHlz-ldlGsEwIBkO0PtzIYTVov97x8p9KCsPNhS4lZUIqKOYoTZUV5LpuAWARl-636DfMEB_A5_IEaw_W8leh2suP2ULVZxwE-Tk1kBC9tsSGrBrPTtg7sziaV4Lbb0JRANmh98uTRu5f8ji9CVOnpbMiAzjsJSy56kz_olweXSuA".to_string();

// First verify the signature.
let sig_verified = jwt.verify_jwt_pk(&token, &pub_key).is_ok();
println!("verified: {}", sig_verified);

// Let's see if the time constraints, if any, are valid.
// The above JWT was created on the afternoon of 16-May-2016, with an expiration of 1 hour.
// If the current system time is before the "nbf" time, or after the "exp" time,
// then IsTimeValid will return false/0.
// Also, we'll allow a leeway of 60 seconds to account for any clock skew.
// Note: If the token has no "nbf" or "exp" claim fields, then IsTimeValid is always true.
let leeway = 60;
let b_time_valid = jwt.is_time_valid(&token, leeway);
println!("time constraints valid: {}", b_time_valid);

// Now let's recover the original claims JSON (the payload).
let payload = jwt.get_payload(&token).unwrap_or_default();
// The payload will likely be in compact form:
println!("{}", payload);

// We can format for human viewing by loading it into Chilkat's JSON object
// and emit.
let json = chilkat::JsonObject::new();
let _ = json.load(&payload).is_ok();
json.set_emit_compact(false);
println!("{}", json.emit().unwrap_or_default());

// We can recover the original JOSE header in the same way:
let jose_header = jwt.get_header(&token).unwrap_or_default();
// The payload will likely be in compact form:
println!("{}", jose_header);

// We can format for human viewing by loading it into Chilkat's JSON object
// and emit.
let _ = json.load(&jose_header).is_ok();
json.set_emit_compact(false);
println!("{}", json.emit().unwrap_or_default());