Zig

Use HTTPS Client Certificate from .cer and .key Files

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Demonstrates how to load a cert + private key from .cer and .key (base64) files and use it for mutual TLS authentication (client-side certificate). Zig

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

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

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

    const http = try chilkat.Http.init();
    defer http.deinit();

    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();

    // Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
    cert.loadFromFile("qa_data/certs/sample_cert_a.cer") catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    // Load the private key.
    const bd = try chilkat.BinData.init();
    defer bd.deinit();
    try bd.loadFile("qa_data/certs/sample_key_a.key");
    priv_key.loadAnyFormat(bd, "privateKeyPasswordIfNecessary") catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    // Associate the private key with the cert.
    cert.setPrivateKey(priv_key) catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    // Set the certificate to be used for mutual TLS authentication
    // (i.e. sets the client-side certificate for two-way TLS authentication)
    http.setSslClientCert(cert) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    // At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
    // connection will automatically use it if the server demands a client-side cert.
}