Rust

Create a CAdES-T Signature

See more CAdES Examples

Demonstrates how to create a signature with an external timestamp that certifies the time of signing. This requires an online TSA (Time Stamping Authority) service that is capable of producing RFC 3161 compliant timestamps.

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 a certificate + private key from a .pfx/.p12 file.
// On Windows systems, it is also possible to use certs on smartcards/usb tokens or certs pre-installed in the Windows registry.
let cert = chilkat::Cert::new();

let pfx_path = "qa_data/pfx/myCertAndKey.p12".to_string();
let pfx_password = "test123".to_string();

if cert.load_pfx_file(&pfx_path, &pfx_password).is_err() {
    println!("{}", cert.last_error_text());
    return;
}

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 in_file = "qa_data/json/sample.json".to_string();
let out_file = "qa_output/sample_cades_t.p7m".to_string();

// This creates the CAdES-T signature.  During the signature creation, it
// communicates with the TSA to get a timestampToken.
if crypt.create_p7_m(&in_file, &out_file).is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

println!("Success.");