/*
 * lws-minimal-secure-streams-avs
 *
 * Written in 2019-2020 by Andy Green <andy@warmcat.com>
 *
 * This file is made available under the Creative Commons CC0 1.0
 * Universal Public Domain Dedication.
 */

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

extern int
avs_example_start(struct lws_context *context);

int interrupted, bad = 1;
static lws_state_notify_link_t nl;
static const char * const default_ss_policy =
	"{"
	  "\"release\":"			"\"01234567\","
	  "\"product\":"			"\"myproduct\","
	  "\"schema-version\":"			"1,"
//	  "\"via-socks5\":"                     "\"127.0.0.1:1080\","
	  "\"retry\": ["	/* named backoff / retry strategies */
		"{\"default\": {"
			"\"backoff\": ["	 "1000,"
						 "2000,"
						 "3000,"
						 "5000,"
						"10000"
				"],"
			"\"conceal\":"		"5,"
			"\"jitterpc\":"		"20,"
			"\"svalidping\":"	"60,"
			"\"svalidhup\":"	"64"
		"}}"
	  "],"
	  "\"certs\": [" /* named individual certificates in BASE64 DER */
		"{\"digicert_global_root_g2\": \"" /* api.amazon.com 2038-01 */
	"MIIDjjCCAnagAwIBAgIQAzrx5qcRqaC7KGSxHQn65TANBgkqhkiG9w0BAQsFADBh"
	"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3"
	"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH"
	"MjAeFw0xMzA4MDExMjAwMDBaFw0zODAxMTUxMjAwMDBaMGExCzAJBgNVBAYTAlVT"
	"MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j"
	"b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IEcyMIIBIjANBgkqhkiG"
	"9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuzfNNNx7a8myaJCtSnX/RrohCgiN9RlUyfuI"
	"2/Ou8jqJkTx65qsGGmvPrC3oXgkkRLpimn7Wo6h+4FR1IAWsULecYxpsMNzaHxmx"
	"1x7e/dfgy5SDN67sH0NO3Xss0r0upS/kqbitOtSZpLYl6ZtrAGCSYP9PIUkY92eQ"
	"q2EGnI/yuum06ZIya7XzV+hdG82MHauVBJVJ8zUtluNJbd134/tJS7SsVQepj5Wz"
	"tCO7TG1F8PapspUwtP1MVYwnSlcUfIKdzXOS0xZKBgyMUNGPHgm+F6HmIcr9g+UQ"
	"vIOlCsRnKPZzFBQ9RnbDhxSJITRNrw9FDKZJobq7nMWxM4MphQIDAQABo0IwQDAP"
	"BgNVHRMBAf8EBTADAQH/MA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQUTiJUIBiV"
	"5uNu5g/6+rkS7QYXjzkwDQYJKoZIhvcNAQELBQADggEBAGBnKJRvDkhj6zHd6mcY"
	"1Yl9PMWLSn/pvtsrF9+wX3N3KjITOYFnQoQj8kVnNeyIv/iPsGEMNKSuIEyExtv4"
	"NeF22d+mQrvHRAiGfzZ0JFrabA0UWTW98kndth/Jsw1HKj2ZL7tcu7XUIOGZX1NG"
	"Fdtom/DzMNU+MeKNhJ7jitralj41E6Vf8PlwUHBHQRFXGU7Aj64GxJUTFy8bJZ91"
	"8rGOmaFvE7FBcf6IKshPECBV1/MUReXgRPTqh5Uykw7+U0b6LJ3/iyK5S9kJRaTe"
	"pLiaWN0bfVKfjllDiIGknibVb63dDcY3fe0Dkhvld1927jyNxF1WW6LZZm6zNTfl"
	"MrY="
		"\"},"
		"{\"digicert_global_ca_g2\": \"" /* api.amazon.com 2028-08 */
	"MIIEizCCA3OgAwIBAgIQDI7gyQ1qiRWIBAYe4kH5rzANBgkqhkiG9w0BAQsFADBh"
	"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3"
	"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH"
	"MjAeFw0xMzA4MDExMjAwMDBaFw0yODA4MDExMjAwMDBaMEQxCzAJBgNVBAYTAlVT"
	"MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxHjAcBgNVBAMTFURpZ2lDZXJ0IEdsb2Jh"
	"bCBDQSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANNIfL7zBYZd"
	"W9UvhU5L4IatFaxhz1uvPmoKR/uadpFgC4przc/cV35gmAvkVNlW7SHMArZagV+X"
	"au4CLyMnuG3UsOcGAngLH1ypmTb+u6wbBfpXzYEQQGfWMItYNdSWYb7QjHqXnxr5"
	"IuYUL6nG6AEfq/gmD6yOTSwyOR2Bm40cZbIc22GoiS9g5+vCShjEbyrpEJIJ7RfR"
	"ACvmfe8EiRROM6GyD5eHn7OgzS+8LOy4g2gxPR/VSpAQGQuBldYpdlH5NnbQtwl6"
	"OErXb4y/E3w57bqukPyV93t4CTZedJMeJfD/1K2uaGvG/w/VNfFVbkhJ+Pi474j4"
	"8V4Rd6rfArMCAwEAAaOCAVowggFWMBIGA1UdEwEB/wQIMAYBAf8CAQAwDgYDVR0P"
	"AQH/BAQDAgGGMDQGCCsGAQUFBwEBBCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29j"
	"c3AuZGlnaWNlcnQuY29tMHsGA1UdHwR0MHIwN6A1oDOGMWh0dHA6Ly9jcmw0LmRp"
	"Z2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5jcmwwN6A1oDOGMWh0dHA6"
	"Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5jcmwwPQYD"
	"VR0gBDYwNDAyBgRVHSAAMCowKAYIKwYBBQUHAgEWHGh0dHBzOi8vd3d3LmRpZ2lj"
	"ZXJ0LmNvbS9DUFMwHQYDVR0OBBYEFCRuKy3QapJRUSVpAaqaR6aJ50AgMB8GA1Ud"
	"IwQYMBaAFE4iVCAYlebjbuYP+vq5Eu0GF485MA0GCSqGSIb3DQEBCwUAA4IBAQAL"
	"OYSR+ZfrqoGvhOlaOJL84mxZvzbIRacxAxHhBsCsMsdaVSnaT0AC9aHesO3ewPj2"
	"dZ12uYf+QYB6z13jAMZbAuabeGLJ3LhimnftiQjXS8X9Q9ViIyfEBFltcT8jW+rZ"
	"8uckJ2/0lYDblizkVIvP6hnZf1WZUXoOLRg9eFhSvGNoVwvdRLNXSmDmyHBwW4co"
	"atc7TlJFGa8kBpJIERqLrqwYElesA8u49L3KJg6nwd3jM+/AVTANlVlOnAM2BvjA"
	"jxSZnE0qnsHhfTuvcqdFuhOWKU4Z0BqYBvQ3lBetoxi6PrABDJXWKTUgNX31EGDk"
	"92hiHuwZ4STyhxGs6QiA"
		"\"},"
		"{\"starfield_services_root_ca\": \""
	"MIID7zCCAtegAwIBAgIBADANBgkqhkiG9w0BAQsFADCBmDELMAkGA1UEBhMCVVMx"
	"EDAOBgNVBAgTB0FyaXpvbmExEzARBgNVBAcTClNjb3R0c2RhbGUxJTAjBgNVBAoT"
	"HFN0YXJmaWVsZCBUZWNobm9sb2dpZXMsIEluYy4xOzA5BgNVBAMTMlN0YXJmaWVs"
	"ZCBTZXJ2aWNlcyBSb290IENlcnRpZmljYXRlIEF1dGhvcml0eSAtIEcyMB4XDTA5"
	"MDkwMTAwMDAwMFoXDTM3MTIzMTIzNTk1OVowgZgxCzAJBgNVBAYTAlVTMRAwDgYD"
	"VQQIEwdBcml6b25hMRMwEQYDVQQHEwpTY290dHNkYWxlMSUwIwYDVQQKExxTdGFy"
	"ZmllbGQgVGVjaG5vbG9naWVzLCBJbmMuMTswOQYDVQQDEzJTdGFyZmllbGQgU2Vy"
	"dmljZXMgUm9vdCBDZXJ0aWZpY2F0ZSBBdXRob3JpdHkgLSBHMjCCASIwDQYJKoZI"
	"hvcNAQEBBQADggEPADCCAQoCggEBANUMOsQq+U7i9b4Zl1+OiFOxHz/Lz58gE20p"
	"OsgPfTz3a3Y4Y9k2YKibXlwAgLIvWX/2h/klQ4bnaRtSmpDhcePYLQ1Ob/bISdm2"
	"8xpWriu2dBTrz/sm4xq6HZYuajtYlIlHVv8loJNwU4PahHQUw2eeBGg6345AWh1K"
	"Ts9DkTvnVtYAcMtS7nt9rjrnvDH5RfbCYM8TWQIrgMw0R9+53pBlbQLPLJGmpufe"
	"hRhJfGZOozptqbXuNC66DQO4M99H67FrjSXZm86B0UVGMpZwh94CDklDhbZsc7tk"
	"6mFBrMnUVN+HL8cisibMn1lUaJ/8viovxFUcdUBgF4UCVTmLfwUCAwEAAaNCMEAw"
	"DwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMCAQYwHQYDVR0OBBYEFJxfAN+q"
	"AdcwKziIorhtSpzyEZGDMA0GCSqGSIb3DQEBCwUAA4IBAQBLNqaEd2ndOxmfZyMI"
	"bw5hyf2E3F/YNoHN2BtBLZ9g3ccaaNnRbobhiCPPE95Dz+I0swSdHynVv/heyNXB"
	"ve6SbzJ08pGCL72CQnqtKrcgfU28elUSwhXqvfdqlS5sdJ/PHLTyxQGjhdByPq1z"
	"qwubdQxtRbeOlKyWN7Wg0I8VRw7j6IPdj/3vQQF3zCepYoUz8jcI73HPdwbeyBkd"
	"iEDPfUYd/x7H4c7/I9vG+o1VTqkC50cRRj70/b17KSa7qWFiNyi2LSr2EIZkyXCn"
	"0q23KXB56jzaYyWf/Wi3MOxw+3WKt21gZ7IeyLnp2KhvAotnDU0mV3HaIPzBSlCN"
	"sSi6"
		"\"},"
		"{\"starfield_class_2_ca\": \""
	"MIIEDzCCAvegAwIBAgIBADANBgkqhkiG9w0BAQUFADBoMQswCQYDVQQGEwJVUzEl"
	"MCMGA1UEChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMp"
	"U3RhcmZpZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMDQw"
	"NjI5MTczOTE2WhcNMzQwNjI5MTczOTE2WjBoMQswCQYDVQQGEwJVUzElMCMGA1UE"
	"ChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMpU3RhcmZp"
	"ZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggEgMA0GCSqGSIb3"
	"DQEBAQUAA4IBDQAwggEIAoIBAQC3Msj+6XGmBIWtDBFk385N78gDGIc/oav7PKaf"
	"8MOh2tTYbitTkPskpD6E8J7oX+zlJ0T1KKY/e97gKvDIr1MvnsoFAZMej2YcOadN"
	"+lq2cwQlZut3f+dZxkqZJRRU6ybH838Z1TBwj6+wRir/resp7defqgSHo9T5iaU0"
	"X9tDkYI22WY8sbi5gv2cOj4QyDvvBmVmepsZGD3/cVE8MC5fvj13c7JdBmzDI1aa"
	"K4UmkhynArPkPw2vCHmCuDY96pzTNbO8acr1zJ3o/WSNF4Azbl5KXZnJHoe0nRrA"
	"1W4TNSNe35tfPe/W93bC6j67eA0cQmdrBNj41tpvi/JEoAGrAgEDo4HFMIHCMB0G"
	"A1UdDgQWBBS/X7fRzt0fhvRbVazc1xDCDqmI5zCBkgYDVR0jBIGKMIGHgBS/X7fR"
	"zt0fhvRbVazc1xDCDqmI56FspGowaDELMAkGA1UEBhMCVVMxJTAjBgNVBAoTHFN0"
	"YXJmaWVsZCBUZWNobm9sb2dpZXMsIEluYy4xMjAwBgNVBAsTKVN0YXJmaWVsZCBD"
	"bGFzcyAyIENlcnRpZmljYXRpb24gQXV0aG9yaXR5ggEAMAwGA1UdEwQFMAMBAf8w"
	"DQYJKoZIhvcNAQEFBQADggEBAAWdP4id0ckaVaGsafPzWdqbAYcaT1epoXkJKtv3"
	"L7IezMdeatiDh6GX70k1PncGQVhiv45YuApnP+yz3SFmH8lU+nLMPUxA2IGvd56D"
	"eruix/U0F47ZEUD0/CwqTRV/p2JdLiXTAAsgGh1o+Re49L2L7ShZ3U0WixeDyLJl"
	"xy16paq8U4Zt3VekyvggQQto8PT7dL5WXXp59fkdheMtlb71cZBDzI0fmgAKhynp"
	"VSJYACPq4xJDKVtHCN2MQWplBqjlIapBtJUhlbl90TSrE9atvNziPTnNvT51cKEY"
	"WQPJIrSPnNVeKtelttQKbfi3QBFGmh95DmK/D5fs4C8fF5Q="
		"\"}"
	  "],"
	  "\"trust_stores\": [" /* named cert chains */
		"{"  /* chain for alexa.na.gateway.devices.a2z.com */
			"\"name\": \"avs_via_starfield\","
			"\"stack\": ["
				"\"starfield_class_2_ca\","
				"\"starfield_services_root_ca\""
			"]"
		"},"
		"{" /* chain for api.amazon.com */
			"\"name\": \"api_amazon_com\","
			"\"stack\": ["
				"\"digicert_global_ca_g2\","
				"\"digicert_global_root_g2\""
			"]"
		"}"
	  "],"
	  "\"auth\": [" /* available auth type bindings */
		"{"
		  "\"name\":"		"\"lwa\","
		  "\"streamtype\":"	"\"api_amazon_com_lwa\","
		  "\"blob\":"		"0"
		"}"
	  "],"
	  "\"s\": [" /* the supported stream types */
		"{\"api_amazon_com_lwa\": {"
			"\"endpoint\":"			"\"api.amazon.com\","
			"\"port\":"			"443,"
			"\"protocol\":"			"\"h1\","
			"\"http_method\":"		"\"POST\","
			"\"http_url\":"			"\"auth/o2/token\","
			"\"opportunistic\":"		"true,"
			"\"tls\":"			"true,"
			"\"h2q_oflow_txcr\":"		"true,"
			"\"http_www_form_urlencoded\":"	"true,"
			"\"http_no_content_length\":"	"true,"
			"\"retry\":"			"\"default\","
			"\"tls_trust_store\":"		"\"api_amazon_com\""
		"}},"
		"{\"avs_event\": {"
			"\"endpoint\":"			"\"alexa.na.gateway.devices.a2z.com\","
			"\"port\":"			"443,"
			"\"protocol\":"			"\"h2\","
			"\"http_method\":"		"\"GET\","
			"\"http_url\":"			"\"v20160207/directives\","
			"\"h2q_oflow_txcr\":"		"true,"
			"\"http_auth_header\":"		"\"authorization:\","
			"\"http_auth_preamble\":"	"\"Bearer \","
			"\"use_auth\":"			"\"lwa\","
			"\"nailed_up\":"		"true,"
			"\"long_poll\":"		"true,"
			"\"retry\":"			"\"default\","
			"\"tls\":"			"true,"
			"\"tls_trust_store\":"		"\"avs_via_starfield\""
		"}},"
		"{\"avs_metadata\": {"
			"\"endpoint\":"			"\"alexa.na.gateway.devices.a2z.com\","
			"\"port\":"			"443,"
			"\"protocol\":"			"\"h2\","
			"\"http_method\":"		"\"POST\","
			"\"http_url\":"			"\"v20160207/events\","
			"\"http_no_content_length\":"	"true,"
			"\"h2q_oflow_txcr\":"		"true,"
			"\"use_auth\":"			"\"lwa\","
			"\"http_auth_header\":"		"\"authorization:\","
			"\"http_auth_preamble\":"	"\"Bearer \","
			"\"http_multipart_name\":"	"\"metadata\","
			"\"http_mime_content_type\":"	"\"application/json; charset=UTF-8\","
#if 1
			"\"http_multipart_ss_in\":"	"true,"
#endif
			"\"rideshare\":"		"\"avs_audio\","
			"\"retry\":"			"\"default\","
			"\"tls\":"			"true,"
			"\"tls_trust_store\":"		"\"avs_via_starfield\""
		"}},"
		"{\"avs_audio\": {"
			"\"endpoint\":"			"\"alexa.na.gateway.devices.a2z.com\","
			"\"port\":"			"443,"
			"\"protocol\":"			"\"h2\","
			"\"http_method\":"		"\"POST\","
			"\"http_url\":"			"\"v20160207/events\","
			"\"http_no_content_length\":"	"true,"
			"\"tls\":"			"true,"
			"\"h2q_oflow_txcr\":"		"true,"
#if 1
			"\"http_multipart_ss_in\":"	"true,"
#endif
			"\"use_auth\":"			"\"lwa\","
			"\"http_auth_header\":"		"\"authorization:\","
			"\"http_auth_preamble\":"	"\"Bearer \","
			"\"http_multipart_name\":"	"\"audio\","
			"\"http_mime_content_type\":"	"\"application/octet-stream\","
			"\"retry\":"			"\"default\","
			"\"tls_trust_store\":"		"\"avs_via_starfield\""
		"}}"
	  "]"
	"}"
;

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";

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

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

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); /* otherwise uninitialized garbage */
	lws_cmdline_option_handle_builtin(argc, argv, &info);

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

	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
		       LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
	info.fd_limit_per_thread = 1 + 6 + 1;
	info.pss_policies_json = default_ss_policy;
	info.port = CONTEXT_PORT_NO_LISTEN;

#if defined(LWS_SS_USE_SSPC)
	{
		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;
	}
#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;

	puts(default_ss_policy);

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

	/* 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;
}
