Sign a JWS with a Certificate

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetSigningCert, which sets the certificate whose associated private key is used to create a signature.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

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

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

    const jws = try chilkat.Jws.init();
    defer jws.deinit();

    // Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
    const header = try chilkat.JsonObject.init();
    defer header.deinit();
    header.updateString("alg", "RS256") catch {};
    jws.setProtectedHeader(0, header) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

    const b_include_bom = false;
    jws.setPayload("This is the content to sign.", "utf-8", b_include_bom) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

    // The file path is relative to the application's current working directory.  An absolute path
    // may also be used.  Supply the path appropriate to your own environment.
    // The PFX password should come from a secure source rather than being hard-coded.
    const pfx_password = "myPfxPassword";

    // Load a certificate that has an associated private key, then set it as the signing certificate for
    // signature 0.  The certificate's private key is used to create the signature.
    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    cert.loadPfxFile("qa_data/signer.pfx", pfx_password) catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    jws.setSigningCert(0, cert) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

    const jws_compact = jws.createJws(alloc) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

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