Create a JWS

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJws, which creates and returns a JWS from the current payload, headers, and signing key.

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();

    // Set the protected header for signer 0, specifying the signature algorithm (alg).
    const header = try chilkat.JsonObject.init();
    defer header.deinit();
    header.updateString("alg", "HS256") catch {};
    jws.setProtectedHeader(0, header) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

    // Set the payload to be signed.
    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;
    };

    // Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
    // rather than hard-coding it.
    const base64_key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    jws.setMacKey(0, base64_key, "base64") catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

    // Create the JWS from the current payload, headers, and signing key.  The returned string is the
    // JWS (compact serialization by default).
    const jws_compact = jws.createJws(alloc) catch {
        std.debug.print("{s}\n", .{try jws.getLastErrorText(alloc)});
        return;
    };

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