picow_http_verify.c

/**
 * Copyright (c) 2023 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdio.h>
#include "pico/stdio.h"
#include "pico/cyw43_arch.h"
#include "pico/async_context.h"
#include "lwip/altcp_tls.h"
#include "example_http_client_util.h"

// Using this url as we know the root cert won't change for a long time
#define HOST "fw-download-alias1.raspberrypi.com"
#define URL_REQUEST "/net_install/boot.sig"

// This is the PUBLIC root certificate exported from a browser
// Note that the newlines are needed
#define TLS_ROOT_CERT_OK "-----BEGIN CERTIFICATE-----\n\
MIIC+jCCAn+gAwIBAgICEAAwCgYIKoZIzj0EAwIwgbcxCzAJBgNVBAYTAkdCMRAw\n\
DgYDVQQIDAdFbmdsYW5kMRIwEAYDVQQHDAlDYW1icmlkZ2UxHTAbBgNVBAoMFFJh\n\
c3BiZXJyeSBQSSBMaW1pdGVkMRwwGgYDVQQLDBNSYXNwYmVycnkgUEkgRUNDIENB\n\
MR0wGwYDVQQDDBRSYXNwYmVycnkgUEkgUm9vdCBDQTEmMCQGCSqGSIb3DQEJARYX\n\
c3VwcG9ydEByYXNwYmVycnlwaS5jb20wIBcNMjExMjA5MTEzMjU1WhgPMjA3MTEx\n\
MjcxMTMyNTVaMIGrMQswCQYDVQQGEwJHQjEQMA4GA1UECAwHRW5nbGFuZDEdMBsG\n\
A1UECgwUUmFzcGJlcnJ5IFBJIExpbWl0ZWQxHDAaBgNVBAsME1Jhc3BiZXJyeSBQ\n\
SSBFQ0MgQ0ExJTAjBgNVBAMMHFJhc3BiZXJyeSBQSSBJbnRlcm1lZGlhdGUgQ0Ex\n\
JjAkBgkqhkiG9w0BCQEWF3N1cHBvcnRAcmFzcGJlcnJ5cGkuY29tMHYwEAYHKoZI\n\
zj0CAQYFK4EEACIDYgAEcN9K6Cpv+od3w6yKOnec4EbyHCBzF+X2ldjorc0b2Pq0\n\
N+ZvyFHkhFZSgk2qvemsVEWIoPz+K4JSCpgPstz1fEV6WzgjYKfYI71ghELl5TeC\n\
byoPY+ee3VZwF1PTy0cco2YwZDAdBgNVHQ4EFgQUJ6YzIqFh4rhQEbmCnEbWmHEo\n\
XAUwHwYDVR0jBBgwFoAUIIAVCSiDPXut23NK39LGIyAA7NAwEgYDVR0TAQH/BAgw\n\
BgEB/wIBADAOBgNVHQ8BAf8EBAMCAYYwCgYIKoZIzj0EAwIDaQAwZgIxAJYM+wIM\n\
PC3wSPqJ1byJKA6D+ZyjKR1aORbiDQVEpDNWRKiQ5QapLg8wbcED0MrRKQIxAKUT\n\
v8TJkb/8jC/oBVTmczKlPMkciN+uiaZSXahgYKyYhvKTatCTZb+geSIhc0w/2w==\n\
-----END CERTIFICATE-----\n"

// This is a test certificate
#define TLS_ROOT_CERT_BAD "-----BEGIN CERTIFICATE-----\n\
MIIDezCCAwGgAwIBAgICEAEwCgYIKoZIzj0EAwIwgasxCzAJBgNVBAYTAkdCMRAw\n\
DgYDVQQIDAdFbmdsYW5kMR0wGwYDVQQKDBRSYXNwYmVycnkgUEkgTGltaXRlZDEc\n\
MBoGA1UECwwTUmFzcGJlcnJ5IFBJIEVDQyBDQTElMCMGA1UEAwwcUmFzcGJlcnJ5\n\
IFBJIEludGVybWVkaWF0ZSBDQTEmMCQGCSqGSIb3DQEJARYXc3VwcG9ydEByYXNw\n\
YmVycnlwaS5jb20wHhcNMjExMjA5MTMwMjIyWhcNNDYxMjAzMTMwMjIyWjA6MQsw\n\
CQYDVQQGEwJHQjErMCkGA1UEAwwiZnctZG93bmxvYWQtYWxpYXMxLnJhc3BiZXJy\n\
eXBpLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABJ6BQv8YtNiNv7ibLtt4\n\
lwpgEr2XD4sOl9wu/l8GnGD5p39YK8jZV0j6HaTNkqi86Nly1H7YklzbxhFy5orM\n\
356jggGDMIIBfzAJBgNVHRMEAjAAMBEGCWCGSAGG+EIBAQQEAwIGQDAzBglghkgB\n\
hvhCAQ0EJhYkT3BlblNTTCBHZW5lcmF0ZWQgU2VydmVyIENlcnRpZmljYXRlMB0G\n\
A1UdDgQWBBRlONP3G2wTERZA9D+VxJABfiaCVTCB5QYDVR0jBIHdMIHagBQnpjMi\n\
oWHiuFARuYKcRtaYcShcBaGBvaSBujCBtzELMAkGA1UEBhMCR0IxEDAOBgNVBAgM\n\
B0VuZ2xhbmQxEjAQBgNVBAcMCUNhbWJyaWRnZTEdMBsGA1UECgwUUmFzcGJlcnJ5\n\
IFBJIExpbWl0ZWQxHDAaBgNVBAsME1Jhc3BiZXJyeSBQSSBFQ0MgQ0ExHTAbBgNV\n\
BAMMFFJhc3BiZXJyeSBQSSBSb290IENBMSYwJAYJKoZIhvcNAQkBFhdzdXBwb3J0\n\
QHJhc3BiZXJyeXBpLmNvbYICEAAwDgYDVR0PAQH/BAQDAgWgMBMGA1UdJQQMMAoG\n\
CCsGAQUFBwMBMAoGCCqGSM49BAMCA2gAMGUCMEHerJRT0WmG5tz4oVLSIxLbCizd\n\
//SdJBCP+072zRUKs0mfl5EcO7dXWvBAb386PwIxAL7LrgpJroJYrYJtqeufJ3a9\n\
zVi56JFnA3cNTcDYfIzyzy5wUskPAykdrRrCS534ig==\n\
-----END CERTIFICATE-----\n"

int main() {
    stdio_init_all();
    if (cyw43_arch_init()) {
        printf("failed to initialise\n");
        return 1;
    }
    cyw43_arch_enable_sta_mode();
    if (cyw43_arch_wifi_connect_timeout_ms(WIFI_SSID, WIFI_PASSWORD, CYW43_AUTH_WPA2_AES_PSK, 10000)) {
        printf("failed to connect\n");
        return 1;
    }
    // This should work
    static const uint8_t cert_ok[] = TLS_ROOT_CERT_OK;
    EXAMPLE_HTTP_REQUEST_T req = {0};
    req.hostname = HOST;
    req.url = URL_REQUEST;
    req.headers_fn = http_client_header_print_fn;
    req.recv_fn = http_client_receive_print_fn;
    req.tls_config = altcp_tls_create_config_client(cert_ok, sizeof(cert_ok));
    int pass = http_client_request_sync(cyw43_arch_async_context(), &req);
    altcp_tls_free_config(req.tls_config);

    // Repeat the test with the wrong certificate. It should fail
    static const uint8_t cert_bad[] = TLS_ROOT_CERT_BAD;
    req.tls_config = altcp_tls_create_config_client(cert_bad, sizeof(cert_bad));
    int fail = http_client_request_sync(cyw43_arch_async_context(), &req);
    altcp_tls_free_config(req.tls_config);

    if (pass != 0 || fail == 0) {
        panic("test failed");
    }
    cyw43_arch_deinit();
    printf("Test passed\n");
    sleep_ms(100);
    return 0;
}