minimal-examples/secure-streams/minimal-secure-streams-staticpolicy/minimal-secure-streams.c

/*
 * lws-minimal-secure-streams-staticpolicy
 *
 * Written in 2010-2021 by Andy Green <andy@warmcat.com>
 *
 * This file is made available under the Creative Commons CC0 1.0
 * Universal Public Domain Dedication.
 *
 *
 * This demonstrates a minimal http client using secure streams api.
 *
 * It visits https://warmcat.com/ and receives the html page there.
 *
 * This example is built two different ways from the same source... one includes
 * the policy everything needed to fulfil the stream directly.  The other -client
 * variant has no policy itself and some other minor init changes, and connects
 * to the -proxy example to actually get the connection done.
 *
 * In the -client build case, the example does not even init the tls libraries
 * since the proxy part will take care of all that.
 */

#include <libwebsockets.h>
#include <string.h>
#include <signal.h>

static int interrupted, bad = 1, force_cpd_fail_portal,
	   force_cpd_fail_no_internet;
static lws_state_notify_link_t nl;

/*
 * This is example builds with a static policy autogenerated from a JSON
 * policy...
 */
#include "static-policy.h"


typedef struct myss {
	struct lws_ss_handle		*ss;
	void				*opaque_data;
	/* ... application specific state ... */
	lws_sorted_usec_list_t		sul;
} myss_t;

static const char *canned_root_token_payload =
	"grant_type=refresh_token"
	"&refresh_token=Atzr|IwEBIJedGXjDqsU_vMxykqOMg"
	"SHfYe3CPcedueWEMWSDMaDnEmiW8RlR1Kns7Cb4B-TOSnqp7ifVsY4BMY2B8tpHfO39XP"
	"zfu9HapGjTR458IyHX44FE71pWJkGZ79uVBpljP4sazJuk8XS3Oe_yLnm_DIO6fU1nU3Y"
	"0flYmsOiOAQE_gRk_pdlmEtHnpMA-9rLw3mkY5L89Ty9kUygBsiFaYatouROhbsTn8-jW"
	"k1zZLUDpT6ICtBXSnrCIg0pUbZevPFhTwdXd6eX-u4rq0W-XaDvPWFO7au-iPb4Zk5eZE"
	"iX6sissYrtNmuEXc2uHu7MnQO1hHCaTdIO2CANVumf-PHSD8xseamyh04sLV5JgFzY45S"
	"KvKMajiUZuLkMokOx86rjC2Hdkx5DO7G-dbG1ufBDG-N79pFMSs7Ck5pc283IdLoJkCQc"
	"AGvTX8o8I29QqkcGou-9TKhOJmpX8As94T61ok0UqqEKPJ7RhfQHHYdCtsdwxgvfVr9qI"
	"xL_hDCcTho8opCVX-6QhJHl6SQFlTw13"
	"&client_id="
		"amzn1.application-oa2-client.4823334c434b4190a2b5a42c07938a2d";

/* secure streams payload interface */

static int
myss_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
{
//	myss_t *m = (myss_t *)userobj;

	lwsl_user("%s: len %d, flags: %d\n", __func__, (int)len, flags);
	lwsl_hexdump_info(buf, len);

	/*
	 * If we received the whole message, for our example it means
	 * we are done.
	 */
	if (flags & LWSSS_FLAG_EOM) {
		bad = 0;
		interrupted = 1;
	}

	return 0;
}

static int
myss_tx(void *userobj, lws_ss_tx_ordinal_t ord, uint8_t *buf, size_t *len,
	int *flags)
{
	//myss_t *m = (myss_t *)userobj;

	return 0;
}

static int
myss_state(void *userobj, void *sh, lws_ss_constate_t state,
	   lws_ss_tx_ordinal_t ack)
{
	myss_t *m = (myss_t *)userobj;

	lwsl_user("%s: %s, ord 0x%x\n", __func__, lws_ss_state_name(state),
		  (unsigned int)ack);

	switch (state) {
	case LWSSSCS_CREATING:
		if (lws_ss_set_metadata(m->ss, "uptag", "myuptag123", 10))
			lwsl_err("%s set metadata uptag failed\n", __func__);
		if (lws_ss_set_metadata(m->ss, "ctype", "myctype", 7))
			lwsl_err("%s set metadata ctype failed\n", __func__);
		return lws_ss_client_connect(m->ss);

	case LWSSSCS_ALL_RETRIES_FAILED:
		/* if we're out of retries, we want to close the app and FAIL */
		interrupted = 1;
		break;
	case LWSSSCS_QOS_ACK_REMOTE:
		lwsl_notice("%s: LWSSSCS_QOS_ACK_REMOTE\n", __func__);
		break;
	default:
		break;
	}

	return 0;
}

static int
app_system_state_nf(lws_state_manager_t *mgr, lws_state_notify_link_t *link,
		    int current, int target)
{
	struct lws_context *context = lws_system_context_from_system_mgr(mgr);
	lws_system_blob_t *ab = lws_system_get_blob(context,
				LWS_SYSBLOB_TYPE_AUTH, 1 /* AUTH_IDX_ROOT */);
	size_t size;

	/*
	 * For the things we care about, let's notice if we are trying to get
	 * past them when we haven't solved them yet, and make the system
	 * state wait while we trigger the dependent action.
	 */
	switch (target) {

	case LWS_SYSTATE_REGISTERED:
		size = lws_system_blob_get_size(ab);
		if (size)
			break;

		/* let's register our canned root token so auth can use it */
		lws_system_blob_direct_set(ab,
				(const uint8_t *)canned_root_token_payload,
				strlen(canned_root_token_payload));
		break;

	case LWS_SYSTATE_OPERATIONAL:
		if (current == LWS_SYSTATE_OPERATIONAL) {
			lws_ss_info_t ssi;

			/* We're making an outgoing secure stream ourselves */

			memset(&ssi, 0, sizeof(ssi));
			ssi.handle_offset = offsetof(myss_t, ss);
			ssi.opaque_user_data_offset = offsetof(myss_t,
							       opaque_data);
			ssi.rx = myss_rx;
			ssi.tx = myss_tx;
			ssi.state = myss_state;
			ssi.user_alloc = sizeof(myss_t);
			ssi.streamtype = "mintest";

			if (lws_ss_create(context, 0, &ssi, NULL, NULL,
					  NULL, NULL)) {
				lwsl_err("%s: failed to create secure stream\n",
					 __func__);
				return -1;
			}
		}
		break;
	}

	return 0;
}

static lws_state_notify_link_t * const app_notifier_list[] = {
	&nl, NULL
};

static void
sigint_handler(int sig)
{
	interrupted = 1;
}

int main(int argc, const char **argv)
{
	struct lws_context_creation_info info;
	struct lws_context *context;
	int n = 0;

	signal(SIGINT, sigint_handler);

	memset(&info, 0, sizeof info);
	lws_cmdline_option_handle_builtin(argc, argv, &info);

	lwsl_user("LWS secure streams static policy test client [-d<verb>]\n");

	/* these options are mutually exclusive if given */

	if (lws_cmdline_option(argc, argv, "--force-portal"))
		force_cpd_fail_portal = 1;

	if (lws_cmdline_option(argc, argv, "--force-no-internet"))
		force_cpd_fail_no_internet = 1;

	info.fd_limit_per_thread = 1 + 6 + 1;
	info.port = CONTEXT_PORT_NO_LISTEN;
#if defined(LWS_SS_USE_SSPC)
	info.protocols = lws_sspc_protocols;
	{
		const char *p;

		/* connect to ssproxy via UDS by default, else via
		 * tcp connection to this port */
		if ((p = lws_cmdline_option(argc, argv, "-p")))
			info.ss_proxy_port = atoi(p);

		/* UDS "proxy.ss.lws" in abstract namespace, else this socket
		 * path; when -p given this can specify the network interface
		 * to bind to */
		if ((p = lws_cmdline_option(argc, argv, "-i")))
			info.ss_proxy_bind = p;

		/* if -p given, -a specifies the proxy address to connect to */
		if ((p = lws_cmdline_option(argc, argv, "-a")))
			info.ss_proxy_address = p;
	}
#else
	info.pss_policies = &_ss_static_policy_entry;
	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
		       LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
#endif

	/* integrate us with lws system state management when context created */

	nl.name = "app";
	nl.notify_cb = app_system_state_nf;
	info.register_notifier_list = app_notifier_list;

	/* create the context */

	context = lws_create_context(&info);
	if (!context) {
		lwsl_err("lws init failed\n");
		return 1;
	}

	/*
	 * Set the related lws_system blobs
	 *
	 * ...direct_set() sets a pointer, so the thing pointed to has to have
	 * a suitable lifetime, eg, something that already exists on the heap or
	 * a const string in .rodata like this
	 */

	lws_system_blob_direct_set(lws_system_get_blob(context,
				   LWS_SYSBLOB_TYPE_DEVICE_SERIAL, 0),
				   (const uint8_t *)"SN12345678", 10);
	lws_system_blob_direct_set(lws_system_get_blob(context,
				   LWS_SYSBLOB_TYPE_DEVICE_FW_VERSION, 0),
				   (const uint8_t *)"v0.01", 5);

	/*
	 * ..._heap_append() appends to a buflist kind of arrangement on heap,
	 * just one block is fine, otherwise it will concatenate the fragments
	 * in the order they were appended (and take care of freeing them at
	 * context destroy time). ..._heap_empty() is also available to remove
	 * everything that was already allocated.
	 *
	 * Here we use _heap_append() just so it's tested as well as direct set.
	 */

	lws_system_blob_heap_append(lws_system_get_blob(context,
				    LWS_SYSBLOB_TYPE_DEVICE_TYPE, 0),
				    (const uint8_t *)"spacerocket", 11);

	/* the event loop */

	while (n >= 0 && !interrupted)
		n = lws_service(context, 0);

	lws_context_destroy(context);

	lwsl_user("Completed: %s\n", bad ? "failed" : "OK");

	return bad;
}