Zig

Create CAdES-BES .p7m for FatturaPA XML Invoice

See more Digital Signatures Examples

Demonstrates how to create a CAdES BES invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75.

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 v9.5.0.75 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 digital certificate and private key from a PFX file (.pfx or .p12).
    const pfx_path = "qa_data/pfx/cert_test123.pfx";
    const pfx_password = "test123";

    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    cert.loadPfxFile(pfx_path, pfx_password) catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    // Provide the signing cert (with associated private key).
    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", .{});
}