Rust

Load a Public Key from Base64 DER

Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.

Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the BEGIN/END armor.

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Rust


// Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
// Base64-encoded DER.  The only argument is the Base64 string (whitespace is allowed).

let pub_key = chilkat::PublicKey::new();

// The Base64 of the DER-encoded public key.
let key_str = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB".to_string();

if pub_key.load_base64(&key_str).is_err() {
    println!("{}", pub_key.last_error_text());
    return;
}

println!("Loaded a {} public key.", pub_key.key_type());