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Create CAdES-BES .p7m using Smart Card or USB Token

See more Digital Signatures Examples

Demonstrates how to create a CAdES BES invoice.xml.p7m using a certificate stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.77 and at the time of this writing is restricted to the Windows operating system.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Note: Requires Chilkat v9.5.0.77 or greater.

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

    const crypt = try chilkat.Crypt2.init();
    defer crypt.deinit();

    // Use a certificate on a smartcard or USB token.
    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    // Load the certificate on the smartcard currently in the reader (or on the USB token).
    // Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
    // See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
    cert.loadFromSmartcard("") catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    // Provide the smartcard PIN.
    // If the PIN is not explicitly provided here, the Windows OS should
    // display a dialog for the PIN.
    cert.setSmartCardPin("000000");

    // Provide the certificate for signing.
    crypt.setSigningCert(cert) catch {
        std.debug.print("{s}\n", .{try crypt.getLastErrorText(alloc)});
        return;
    };

    // Indicate that SHA-256 should be used.
    crypt.setHashAlgorithm("sha256");

    // Specify the signed attributes to be included.
    // (This is what makes it CAdES-BES compliant.)
    const json_signed_attrs = try chilkat.JsonObject.init();
    defer json_signed_attrs.deinit();
    json_signed_attrs.updateInt("contentType", 1) catch {};
    json_signed_attrs.updateInt("signingTime", 1) catch {};
    json_signed_attrs.updateInt("messageDigest", 1) catch {};
    json_signed_attrs.updateInt("signingCertificateV2", 1) catch {};
    crypt.setSigningAttributes(try json_signed_attrs.emit(alloc));

    const in_file = "qa_data/xml/IT01234567890_11002.xml";
    const sig_file = "qa_output/IT01234567890_11002.xml.p7m";

    // Create the CAdES-BES signature, which contains the original data.
    crypt.createP7M(in_file, sig_file) catch {
        std.debug.print("{s}\n", .{try crypt.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Success.\n", .{});
}