Get the Server Certificate from a TLS Connection

See more Socket/SSL/TLS Examples

Demonstrates Socket.GetServerCert, which copies the certificate presented by the remote TLS server into a Cert object for inspection.

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

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

    const socket = try chilkat.Socket.init();
    defer socket.deinit();

    // Connect to the server using TLS.
    const b_tls = true;
    const max_wait_ms = 5000;
    socket.connect("example.com", 5000, b_tls, max_wait_ms) catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    // Copy the certificate presented by the remote TLS server, then inspect it.  This can be used to
    // validate the server's identity.
    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    socket.getServerCert(cert) catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Server certificate subject: {s}\n", .{try cert.getSubjectCN(alloc)});
    std.debug.print("Issued by: {s}\n", .{try cert.getIssuerCN(alloc)});
}