minimal-examples/secure-streams/minimal-secure-streams-proxy/main.c - platform/external/libwebsockets - Git at Google

 /*
  * lws-minimal-secure-streams-proxy
  *
  * Written in 2010-2020 by Andy Green <[email protected]>
  *
  * This file is made available under the Creative Commons CC0 1.0
  * Universal Public Domain Dedication.
  *
  *
  * This is the proxy part for examples built to use it to connect to... it has
  * the policy and the core SS function, but it doesn't contain any of the user
  * code "business logic"... that's in the clients.
  *
  * The proxy side has the policy and performs the onward connection proxying
  * fulfilment.  The clients state the streamtype name they want and ask for the
  * client to do the connection part.
  *
  * Rideshare information is being parsed out at the proxy side; the SSS RX part
  * also brings with it rideshare names.
  *
  * Metadata is passed back over SSS from the client in the TX messages for the
  * proxy to use per the policy.
  */

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

 #if defined(__APPLE__) || defined(__linux__)
 #include <execinfo.h>
 #include <assert.h>
 #endif

 static int interrupted, bad = 1, port = 0 /* unix domain socket */;
 static const char *ibind = NULL; /* default to unix domain skt "proxy.ss.lws" */
 static lws_state_notify_link_t nl;
 static struct lws_context *context;

 /*
  * We just define enough policy so it can fetch the latest one securely
  */

 static const char * const default_ss_policy =
 	"{"
 	  "\"release\":"			"\"01234567\","
 	  "\"product\":"			"\"myproduct\","
 	  "\"schema-version\":"			"1,"
 	  "\"retry\": ["	/* named backoff / retry strategies */
 		"{\"default\": {"
 			"\"backoff\": ["	 "1000,"
 						 "2000,"
 						 "3000,"
 						 "5000,"
 						"10000"
 				"],"
 			"\"conceal\":"		"5,"
 			"\"jitterpc\":"		"20,"
 			"\"svalidping\":"	"30,"
 			"\"svalidhup\":"	"35"
 		"}}"
 	  "],"
 	  "\"certs\": [" /* named individual certificates in BASE64 DER */
 		/*
 		 * Let's Encrypt certs for warmcat.com / libwebsockets.org
 		 *
 		 * We fetch the real policy from there using SS and switch to
 		 * using that.
 		 */
 		"{\"isrg_root_x1\": \""
 	"MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw"
 	"TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh"
 	"cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4"
 	"WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu"
 	"ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY"
 	"MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc"
 	"h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+"
 	"0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U"
 	"A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW"
 	"T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH"
 	"B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC"
 	"B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv"
 	"KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn"
 	"OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn"
 	"jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw"
 	"qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI"
 	"rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV"
 	"HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq"
 	"hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL"
 	"ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ"
 	"3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK"
 	"NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5"
 	"ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur"
 	"TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC"
 	"jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc"
 	"oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq"
 	"4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA"
 	"mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d"
 	"emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc="
 		"\"}"
 	  "],"
 	  "\"trust_stores\": [" /* named cert chains */
 		"{"
 			"\"name\": \"le_via_isrg\","
 			"\"stack\": ["
 				"\"isrg_root_x1\""
 			"]"
 		"}"
 	  "],"
 	  "\"s\": [{"
 		"\"captive_portal_detect\": {"
 			"\"endpoint\": \"connectivitycheck.android.com\","
 			"\"http_url\": \"generate_204\","
 			"\"port\": 80,"
 			"\"protocol\": \"h1\","
 			"\"http_method\": \"GET\","
 			"\"opportunistic\": true,"
 			"\"http_expect\": 204,"
 			"\"http_fail_redirect\": true"
 		"},"
 		"\"fetch_policy\": {"
 			"\"endpoint\":"		"\"warmcat.com\","
 			"\"port\":"		"443,"
 			"\"protocol\":"		"\"h1\","
 			"\"http_method\":"	"\"GET\","
 			"\"http_url\":"		"\"policy/minimal-proxy-v4.2-v2.json\","
 			"\"tls\":"		"true,"
 			"\"opportunistic\":"	"true,"
 			"\"retry\":"		"\"default\","
 			"\"tls_trust_store\":"	"\"le_via_isrg\""
 		"}}"
 	"}"
 ;

 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";

 #if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)
 static char *aws_keyid = NULL,
 	    *aws_key = NULL;
 #endif

 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) {
 #if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)

 			if (lws_aws_filesystem_credentials_helper(
 						  "~/.aws/credentials",
 						  "aws_access_key_id",
 						  "aws_secret_access_key",
 						  &aws_keyid, &aws_key))
 				return -1;

 			lws_ss_sigv4_set_aws_key(context, 0, aws_keyid, aws_key);
 #endif
 			/*
 			 * At this point we have DHCP, ntp, system auth token
 			 * and we can reasonably create the proxy
 			 */
 			if (lws_ss_proxy_create(context, ibind, port)) {
 				lwsl_err("%s: failed to create ss proxy\n",
 						__func__);
 				return -1;
 			}
 		}
 		break;
 	case LWS_SYSTATE_POLICY_INVALID:
 		/*
 		 * This is a NOP since we used direct set... but in a real
 		 * system this could easily change to be done on the heap, then
 		 * this would be important
 		 */
 		lws_system_blob_destroy(lws_system_get_blob(context,
 					LWS_SYSBLOB_TYPE_AUTH,
 					1 /* AUTH_IDX_ROOT */));
 		break;
 	}

 	return 0;
 }

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

 #if defined(LWS_WITH_SYS_METRICS)

 static int
 my_metric_report(lws_metric_pub_t *mp)
 {
 	lws_metric_bucket_t *sub = mp->u.hist.head;
 	char buf[192];

 	do {
 		if (lws_metrics_format(mp, &sub, buf, sizeof(buf)))
 			lwsl_user("%s: %s\n", __func__, buf);
 	} while ((mp->flags & LWSMTFL_REPORT_HIST) && sub);

 	/* 0 = leave metric to accumulate, 1 = reset the metric */

 	return 1;
 }

 static const lws_system_ops_t system_ops = {
 	.metric_report = my_metric_report,
 };

 #endif

 static void
 sigint_handler(int sig)
 {
 	lwsl_notice("%s\n", __func__);
 	interrupted = 1;
 	lws_cancel_service(context);
 }

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

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

 	signal(SIGINT, sigint_handler);

 	/* connect to ssproxy via UDS by default, else via tcp with this port */
 	if ((p = lws_cmdline_option(argc, argv, "-p")))
 		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")))
 		ibind = p;

 	lwsl_user("LWS secure streams Proxy [-d<verb>]\n");

 	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
 		       LWS_SERVER_OPTION_H2_JUST_FIX_WINDOW_UPDATE_OVERFLOW |
 		       LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
 	info.fd_limit_per_thread = 1 + 26 + 1;
 	info.pss_policies_json = default_ss_policy;
 	info.port = CONTEXT_PORT_NO_LISTEN;

 	/* 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;

 	info.pt_serv_buf_size = (unsigned int)((6144 * 2) + 2048);
 	info.max_http_header_data = (unsigned short)(6144 + 2048);

 #if defined(LWS_WITH_SYS_METRICS)
 	info.system_ops = &system_ops;
 	info.metrics_prefix = "ssproxy";
 #endif

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

 	/* the event loop */

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

 	bad = 0;

 #if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)
 	if (aws_keyid)
 		free(aws_keyid);
 	if (aws_key)
 		free(aws_key);
 #endif

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

 	return bad;
 }
	/*
	* lws-minimal-secure-streams-proxy
	*
	* Written in 2010-2020 by Andy Green <[email protected]>
	*
	* This file is made available under the Creative Commons CC0 1.0
	* Universal Public Domain Dedication.
	*
	*
	* This is the proxy part for examples built to use it to connect to... it has
	* the policy and the core SS function, but it doesn't contain any of the user
	* code "business logic"... that's in the clients.
	*
	* The proxy side has the policy and performs the onward connection proxying
	* fulfilment. The clients state the streamtype name they want and ask for the
	* client to do the connection part.
	*
	* Rideshare information is being parsed out at the proxy side; the SSS RX part
	* also brings with it rideshare names.
	*
	* Metadata is passed back over SSS from the client in the TX messages for the
	* proxy to use per the policy.
	*/

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

	#if defined(__APPLE__) \|\| defined(__linux__)
	#include <execinfo.h>
	#include <assert.h>
	#endif

	static int interrupted, bad = 1, port = 0 /* unix domain socket */;
	static const char ibind = NULL; / default to unix domain skt "proxy.ss.lws" */
	static lws_state_notify_link_t nl;
	static struct lws_context *context;

	/*
	* We just define enough policy so it can fetch the latest one securely
	*/

	static const char * const default_ss_policy =
	"{"
	"\"release\":" "\"01234567\","
	"\"product\":" "\"myproduct\","
	"\"schema-version\":" "1,"
	"\"retry\": [" /* named backoff / retry strategies */
	"{\"default\": {"
	"\"backoff\": [" "1000,"
	"2000,"
	"3000,"
	"5000,"
	"10000"
	"],"
	"\"conceal\":" "5,"
	"\"jitterpc\":" "20,"
	"\"svalidping\":" "30,"
	"\"svalidhup\":" "35"
	"}}"
	"],"
	"\"certs\": [" /* named individual certificates in BASE64 DER */
	/*
	* Let's Encrypt certs for warmcat.com / libwebsockets.org
	*
	* We fetch the real policy from there using SS and switch to
	* using that.
	*/
	"{\"isrg_root_x1\": \""
	"MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw"
	"TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh"
	"cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4"
	"WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu"
	"ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY"
	"MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc"
	"h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+"
	"0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U"
	"A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW"
	"T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH"
	"B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC"
	"B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv"
	"KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn"
	"OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn"
	"jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw"
	"qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI"
	"rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV"
	"HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq"
	"hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL"
	"ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ"
	"3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK"
	"NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5"
	"ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur"
	"TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC"
	"jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc"
	"oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq"
	"4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA"
	"mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d"
	"emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc="
	"\"}"
	"],"
	"\"trust_stores\": [" /* named cert chains */
	"{"
	"\"name\": \"le_via_isrg\","
	"\"stack\": ["
	"\"isrg_root_x1\""
	"]"
	"}"
	"],"
	"\"s\": [{"
	"\"captive_portal_detect\": {"
	"\"endpoint\": \"connectivitycheck.android.com\","
	"\"http_url\": \"generate_204\","
	"\"port\": 80,"
	"\"protocol\": \"h1\","
	"\"http_method\": \"GET\","
	"\"opportunistic\": true,"
	"\"http_expect\": 204,"
	"\"http_fail_redirect\": true"
	"},"
	"\"fetch_policy\": {"
	"\"endpoint\":" "\"warmcat.com\","
	"\"port\":" "443,"
	"\"protocol\":" "\"h1\","
	"\"http_method\":" "\"GET\","
	"\"http_url\":" "\"policy/minimal-proxy-v4.2-v2.json\","
	"\"tls\":" "true,"
	"\"opportunistic\":" "true,"
	"\"retry\":" "\"default\","
	"\"tls_trust_store\":" "\"le_via_isrg\""
	"}}"
	"}"
	;

	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";

	#if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)
	static char *aws_keyid = NULL,
	*aws_key = NULL;
	#endif

	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) {
	#if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)

	if (lws_aws_filesystem_credentials_helper(
	"~/.aws/credentials",
	"aws_access_key_id",
	"aws_secret_access_key",
	&aws_keyid, &aws_key))
	return -1;

	lws_ss_sigv4_set_aws_key(context, 0, aws_keyid, aws_key);
	#endif
	/*
	* At this point we have DHCP, ntp, system auth token
	* and we can reasonably create the proxy
	*/
	if (lws_ss_proxy_create(context, ibind, port)) {
	lwsl_err("%s: failed to create ss proxy\n",
	__func__);
	return -1;
	}
	}
	break;
	case LWS_SYSTATE_POLICY_INVALID:
	/*
	* This is a NOP since we used direct set... but in a real
	* system this could easily change to be done on the heap, then
	* this would be important
	*/
	lws_system_blob_destroy(lws_system_get_blob(context,
	LWS_SYSBLOB_TYPE_AUTH,
	1 /* AUTH_IDX_ROOT */));
	break;
	}

	return 0;
	}

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

	#if defined(LWS_WITH_SYS_METRICS)

	static int
	my_metric_report(lws_metric_pub_t *mp)
	{
	lws_metric_bucket_t *sub = mp->u.hist.head;
	char buf[192];

	do {
	if (lws_metrics_format(mp, &sub, buf, sizeof(buf)))
	lwsl_user("%s: %s\n", __func__, buf);
	} while ((mp->flags & LWSMTFL_REPORT_HIST) && sub);

	/* 0 = leave metric to accumulate, 1 = reset the metric */

	return 1;
	}

	static const lws_system_ops_t system_ops = {
	.metric_report = my_metric_report,
	};

	#endif

	static void
	sigint_handler(int sig)
	{
	lwsl_notice("%s\n", __func__);
	interrupted = 1;
	lws_cancel_service(context);
	}

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

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

	signal(SIGINT, sigint_handler);

	/* connect to ssproxy via UDS by default, else via tcp with this port */
	if ((p = lws_cmdline_option(argc, argv, "-p")))
	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")))
	ibind = p;

	lwsl_user("LWS secure streams Proxy [-d<verb>]\n");

	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS \|
	LWS_SERVER_OPTION_H2_JUST_FIX_WINDOW_UPDATE_OVERFLOW \|
	LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
	info.fd_limit_per_thread = 1 + 26 + 1;
	info.pss_policies_json = default_ss_policy;
	info.port = CONTEXT_PORT_NO_LISTEN;

	/* 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;

	info.pt_serv_buf_size = (unsigned int)((6144 * 2) + 2048);
	info.max_http_header_data = (unsigned short)(6144 + 2048);

	#if defined(LWS_WITH_SYS_METRICS)
	info.system_ops = &system_ops;
	info.metrics_prefix = "ssproxy";
	#endif

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

	/* the event loop */

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

	bad = 0;

	#if defined(LWS_WITH_SECURE_STREAMS_AUTH_SIGV4)
	if (aws_keyid)
	free(aws_keyid);
	if (aws_key)
	free(aws_key);
	#endif

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

	return bad;
	}