Rust

PKCS11 XML Signature using Certificate and Private Key on Smart Card / USB Token

See more PKCS11 Examples

Sample code showing how to use PKCS11 to create an XML digital signature with a certificate and private key stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.96 or later.

Rust

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

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

let pkcs11 = chilkat::Pkcs11::new();

// This example is tested on Windows using a Giesecke and Devrient Sm@rtCafe Expert 3.2 smart card.
// You will use the DLL (or shared lib) provided by your smart card vendor, or a DLL compatible with your smart card.
// On Windows, if the DLL is located in C:\Windows\System32, specify only the filename.
// Otherwise provide the full path.
pkcs11.set_shared_lib_path("aetpkss1.dll");

// Make it an authenticated session by calling Login.
let user_type = 1;
// Make sure to use the correct PIN for your smart card..
let pin = "0000".to_string();

if pkcs11.quick_session(user_type, &pin).is_err() {
    println!("{}", pkcs11.last_error_text());
    return;
}

// Get the certificate (on the smart card) that has a private key.
let cert = chilkat::Cert::new();
if pkcs11.find_cert("privateKey", "", &cert).is_ok() {
    println!("Cert with private key: {}", cert.subject_cn());
} else {
    println!("No certificates having a private key were found.");
    let _ = pkcs11.close_session().is_ok();
    return;
}

// --------------------------------------------------------------------------
// At this point, we have the cert to be used for signing.
// Our XML signing code is the same as for a cert obtained from any other source..

// First generate the following XML to be signed:
// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

// <?xml version="1.0" encoding="UTF-8" standalone="no" ?>
// <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
//     <SOAP-ENV:Header>
//         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1"></wsse:Security>
//     </SOAP-ENV:Header>
//     <SOAP-ENV:Body xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" SOAP-SEC:id="Body">
//         <z:FooBar xmlns:z="http://example.com" />
//     </SOAP-ENV:Body>
// </SOAP-ENV:Envelope>

let xml = chilkat::Xml::new();
xml.set_tag("SOAP-ENV:Envelope");
let _ = xml.add_attribute("xmlns:SOAP-ENV", "http://schemas.xmlsoap.org/soap/envelope/");
let _ = xml.update_attr_at("SOAP-ENV:Header|wsse:Security", true, "xmlns:wsse", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
let _ = xml.update_attr_at("SOAP-ENV:Header|wsse:Security", true, "SOAP-ENV:mustUnderstand", "1");
let _ = xml.update_attr_at("SOAP-ENV:Body", true, "xmlns:SOAP-SEC", "http://schemas.xmlsoap.org/soap/security/2000-12");
let _ = xml.update_attr_at("SOAP-ENV:Body", true, "SOAP-SEC:id", "Body");
let _ = xml.update_attr_at("SOAP-ENV:Body|z:FooBar", true, "xmlns:z", "http://example.com");

let gen_ = chilkat::XmlDSigGen::new();

// Indicate where the Signature will be inserted.
gen_.set_sig_location("SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security");

// Add a reference to the fragment of the XML to be signed.

// Note: "Body" refers to the XML element having an "id" equal to "Body", where "id" is case insensitive
// and where any namespace might qualify the attribute.  In this case, the SOAP-ENV:Body fragment is signed
// NOT because the tag = "Body", but because it has SOAP-SEC:id="Body"
let _ = gen_.add_same_doc_ref("Body", "sha1", "EXCL_C14N", "", "");

// (You can read about the SignedInfoPrefixList in the online reference documentation.  It's optional..)
gen_.set_signed_info_prefix_list("wsse SOAP-ENV");

// Provide the private key for signing via the certificate, and indicate that
// we want the base64 of the certificate embedded in the KeyInfo.
gen_.set_key_info_type("X509Data");
gen_.set_x509_type("Certificate");

let b_use_private_key = true;
if gen_.set_x509_cert(&cert, b_use_private_key).is_err() {
    println!("{}", gen_.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

// Everything's specified.  Now create and insert the Signature
let sb_xml = chilkat::StringBuilder::new();
xml.set_emit_compact(true);
let _ = xml.get_xml_sb(&sb_xml);

if gen_.create_xml_d_sig_sb(&sb_xml).is_err() {
    println!("{}", gen_.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

// Examine the XML with the digital signature inserted
println!("{}", sb_xml.get_as_string().unwrap_or_default());

// --------------------------------------------------------------------------

// Revert to an unauthenticated session by calling Logout.
if pkcs11.logout().is_err() {
    println!("{}", pkcs11.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
if pkcs11.close_session().is_err() {
    println!("{}", pkcs11.last_error_text());
    return;
}

println!("Success.");