Rust

Verify JWT with EdDSA / Ed25519 Signature

See more JSON Web Token (JWT) Examples

Note: This example requires Chilkat v9.5.0.84 or greater.

Demonstrates how to verify a JWT that was signed using an Ed25519 private key.

This example verifies the EdDSA 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 data.

Rust

// Demonstrates how to verify a JWT with an EdDSA/Ed25519 Signature
// *** Requires Chilkat v9.5.0.84 or greater.

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

// Use this Ed25519 public key for verification

let json_pub_key = "{\"kty\": \"OKP\",\"alg\": \"EdDSA\",\"crv\": \"Ed25519\",\"x\": \"11qYAYKxCrfVS_7TyWQHOg7hcvPapiMlrwIaaPcHURo\"}".to_string();

let pub_key = chilkat::PublicKey::new();
if pub_key.load_from_string(&json_pub_key).is_err() {
    println!("{}", pub_key.last_error_text());
    return;
}

let jwt = chilkat::Jwt::new();
let token = "eyJhbGciOiJFZERTQSJ9.RXhhbXBsZSBvZiBFZDI1NTE5IHNpZ25pbmc.hgyY0il_MGCjP0JzlnLWG1PPOt7-09PGcvMg3AIbQR6dWbhijcNR4ki4iylGjg5BhVsPt9g7sVvpAr_MuM0KAg".to_string();

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

if !sig_verified {
    println!("{}", jwt.last_error_text());
    return;
}

// 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);

// Recover the original data (the payload).
let payload = jwt.get_payload(&token).unwrap_or_default();
println!("{}", payload);

// Recover the original JOSE header in the same way:
let jose_header = jwt.get_header(&token).unwrap_or_default();
println!("{}", jose_header);