Rust Requires Chilkat v11.0.0+

Generate ECDSA Key and Get Details as XML

See more ECC Examples

Demonstrates how to generate an ECDSA key and gets the parts as XML. Rust

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

let ecc = chilkat::Ecc::new();

// Generate a random ECC private key on the secp256k1 curve.
// Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256r1.

// Create a Fortuna PRNG and seed it with system entropy.
// This will be our source of random data for generating the ECC private key.
let fortuna = chilkat::Prng::new();
let entropy = fortuna.get_entropy(32, "base64").unwrap_or_default();
let _ = fortuna.add_entropy(&entropy, "base64").is_ok();

let priv_key = chilkat::PrivateKey::new();
if ecc.gen_key("secp256k1", &fortuna, &priv_key).is_err() {
    println!("{}", ecc.last_error_text());
    return;
}

// An EC private key has this ASN.1
// ECPrivateKey ::= SEQUENCE {
//     version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
//     privateKey     OCTET STRING,
//     parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
//     publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

let asn = chilkat::Asn::new();
if asn.load_encoded(&priv_key.get_pkcs1_enc("base64").unwrap_or_default(), "base64").is_err() {
    println!("{}", asn.last_error_text());
    return;
}

let xml = chilkat::Xml::new();
let _ = xml.load_xml(&asn.asn_to_xml().unwrap_or_default());

println!("{}", xml.get_xml().unwrap_or_default());

// The XML looks like this:
// <?xml version="1.0" encoding="utf-8" ?>
// <sequence>
//     <int>01</int>
//     <octets>JgJvBG+3wletkJab8iXAkpz0O8/AgWZSpkYVcB7SpnU=</octets>
//     <contextSpecific tag="0" constructed="1">
//         <oid>1.3.132.0.10</oid>
//     </contextSpecific>
// </sequence>

// The 32-byte private key is in the octets..
// Get it as hex.
let crypt = chilkat::Crypt2::new();
let priv_key_hex = crypt.re_encode(&xml.get_child_content("octets").unwrap_or_default(), "base64", "hex").unwrap_or_default();

println!("EC private key as hex = {}", priv_key_hex);