Rust

Sign String to create a CAdES-T Signature

See more CAdES Examples

This example will sign a string to create a CAdEST-T signature.

Note: This example requires Chilkat v9.5.0.78 or greater.

Rust

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

let crypt = chilkat::Crypt2::new();

// This example will use the certificate + private key currently inserted into a smartcard reader.
let cert = chilkat::Cert::new();

// If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system).
cert.set_smart_card_pin("000000");
if cert.load_from_smartcard("").is_err() {
    println!("{}", cert.last_error_text());
    return;
}

// Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as 
// pre-installed Windows certificates.

let _ = crypt.set_signing_cert(&cert).is_ok();

// Use SHA-256 rather than the default of SHA-1
crypt.set_hash_algorithm("sha256");

// Create JSON that tells Chilkat what signing attributes to include:
let attrs = chilkat::JsonObject::new();
let _ = attrs.update_bool("contentType", true);
let _ = attrs.update_bool("signingTime", true);
let _ = attrs.update_bool("messageDigest", true);
let _ = attrs.update_bool("signingCertificateV2", true);

// A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
// We must include the TSA's URL, as well as a few options to indicate what is desired.
// Except for the TSA URL, the options shown here are typically what you would need.
let _ = attrs.update_bool("timestampToken.enabled", true);
let _ = attrs.update_string("timestampToken.tsaUrl", "https://freetsa.org/tsr");
let _ = attrs.update_bool("timestampToken.addNonce", false);
let _ = attrs.update_bool("timestampToken.requestTsaCert", true);
let _ = attrs.update_string("timestampToken.hashAlg", "sha256");

crypt.set_signing_attributes(&attrs.emit().unwrap_or_default());

let str_to_sign = "THIS IS MY ID".to_string();

let bd = chilkat::BinData::new();
let _ = bd.append_string(&str_to_sign, "utf-8");

// This creates the CAdES-T signature.  During the signature creation, it
// communicates with the TSA to get a timestampToken.
// The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
if crypt.opaque_sign_bd(&bd).is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

// Get the signature in base64 format:
println!("{}", bd.get_encoded("base64_mime").unwrap_or_default());

// Or save the signature to a file.
let _ = bd.write_file("qa_output/cades-t_sample.p7m");

println!("Success.");