Rust

Ed25519 Sign and Verify

See more Ed25519 Examples

Demonstrates how to create an Ed25519 signature, and then to verify it.

Note: This example requires Chilkat v9.5.0.83 or greater.

Rust

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

let priv_key_hex = "1498b5467a63dffa2dc9d9e069caf075d16fc33fdd4c3b01bfadae6433767d93".to_string();
let pub_key_hex = "b7a3c12dc0c8c748ab07525b701122b88bd78f600c76342d27f25e5f92444cde".to_string();

let priv_key = chilkat::PrivateKey::new();
// This example shows only one way of loading an Ed25519 private key.
// Chilkat can load other formats (JWK, PEM, ASN.1 DER, etc.)  
// You may do so by calling LoadAnyFormat or LoadAnyFormatFile.
if priv_key.load_ed25519(&priv_key_hex, &pub_key_hex).is_err() {
    println!("{}", priv_key.last_error_text());
    return;
}

// The data to be signed...
let bd = chilkat::BinData::new();
let _ = bd.append_string("Message for Ed25519 signing", "utf-8");

let eddsa = chilkat::EdDSA::new();
let hex_sig = eddsa.sign_bd_enc(&bd, "hexlower", &priv_key).unwrap_or_default();

println!("signature = {}", hex_sig);

// The expected output is: 6dd355667fae4eb43c6e0ab92e870edb2de0a88cae12dbd8591507f584fe4912babff497f1b8edf9567d2483d54ddc6459bea7855281b7a246a609e3001a4e08

// Verify the signature..
let pub_key = chilkat::PublicKey::new();
if pub_key.load_ed25519(&pub_key_hex).is_err() {
    println!("{}", pub_key.last_error_text());
    return;
}

if eddsa.verify_bd_enc(&bd, &hex_sig, "hexlower", &pub_key).is_err() {
    println!("{}", eddsa.last_error_text());
    println!("Failed to verify the signature.");
    return;
}

println!("The Ed25519 signature is verified!");