Zig

HTTP - Verify Server is a Trusted Root CA

See more HTTP Examples

Demonstrates how to only allow connections to an HTTP server having a certificate with a root that is in our list of trusted CA root certificates. Zig

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

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

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

    //  On my particular system, the root CA cert for this URL is not pre-installed.
    //  Note: This may be different for you.
    //  Also, this example was written on 29-May-2015.  This URL was valid at the time,
    //  but may not be valid at a future date.
    const url = "https://animals.nationalgeographic.com/animals/invertebrates/starfish/";

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

    //  Require that the SSL/TLS server certificate is not expired,
    //  and that the certificate signature is valid.
    //  This does not ensure that it has a chain of authentication to
    //  a trusted root.  To ensure that, the TrustedRoots object (below) is required.
    http.setRequireSslCertVerify(true);

    //  Do the HTTPS page fetch (through the SSH tunnel)
    var html: [:0]const u8 = http.quickGetStr(alloc, url) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("The HTTP GET was successful.\n", .{});

    //  Now let's require that HTTP requests to SSL/TLS servers that don't have trusted CA roots
    //  should fail.
    const trusted_roots = try chilkat.TrustedRoots.init();
    defer trusted_roots.deinit();

    //  Indicate that we will trust any pre-installed certificates on this system.
    //  (The meaning of pre-installed certificates depends on the operating system, and in
    //  some environments there is no such thing as pre-installed certificates.  See the reference
    //  documentation for the TrustedRoots class.)
    trusted_roots.setTrustSystemCaRoots(true);

    //  Activate the trusted roots globally for all Chilkat objects.
    //  This call really shouldn't fail, so we're not checking the return value.
    try trusted_roots.activate();

    //  Given that our previous HTTP GET likely kept the connection open,
    //  make sure that all HTTP connections are closed before re-trying.
    //  Otherwise, we'll simply be re-using the pre-existing connection.
    try http.closeAllConnections();

    //  Now let's try fetching the URL again.  It should fail this time because
    //  there is a requirement that the SSL/TLS server certificate must have a trusted root,
    //  and the trusted root for this URL is not installed on my system (but may be different for you..)
    html = http.quickGetStr(alloc, url) catch "";
    if (!http.getLastMethodSuccess()) {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        std.debug.print("Good, the HTTP request failed as expected.\n", .{});
    } else {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        std.debug.print("Hmmm... we did not fail as expected?\n", .{});
    }
}