test(mqttsn): generate TLS certificates for tests on the fly

apps/emqx_gateway_mqttsn/test/emqx_sn_protocol_SUITE.erl

@@ -88,9 +88,9 @@
     "  listeners.dtls.default {\n"
     "    bind = 1885\n"
     "    dtls_options {\n"
-    "      cacertfile = \"${certdir}ca.crt\"\n"
-    "      certfile = \"${certdir}dtls.server.crt\"\n"
-    "      keyfile = \"${certdir}dtls.server.key\"\n"
+    "      cacertfile = \"${cacertfile}\"\n"
+    "      certfile = \"${certfile}\"\n"
+    "      keyfile = \"${keyfile}\"\n"
     "    }\n"
     "  }\n"
     "}\n"
@@ -104,10 +104,19 @@ all() ->
     emqx_common_test_helpers:all(?MODULE).
 
 init_per_suite(Config) ->
-    ConfTemplate = emqx_template:parse(?CONF_DEFAULT),
-    Conf = emqx_template:render_strict(ConfTemplate, #{
-        certdir => ?config(data_dir, Config)
-    }),
+    PrivDir = ?config(priv_dir, Config),
+    Root = emqx_cth_tls:gen_cert(#{key => ec, issuer => root}),
+    Server = emqx_cth_tls:gen_cert(#{key => ec, issuer => Root}),
+    {CACertfile, _} = emqx_cth_tls:write_cert(PrivDir, Root),
+    {Certfile, Keyfile} = emqx_cth_tls:write_cert(PrivDir, Server),
+    Conf = emqx_template:render_strict(
+        emqx_template:parse(?CONF_DEFAULT),
+        #{
+            cacertfile => CACertfile,
+            certfile => Certfile,
+            keyfile => Keyfile
+        }
+    ),
     Apps = emqx_cth_suite:start(
         [
             {emqx_conf, Conf},
@@ -119,7 +128,7 @@ init_per_suite(Config) ->
         #{work_dir => emqx_cth_suite:work_dir(Config)}
     ),
     emqx_common_test_http:create_default_app(),
-    [{suite_apps, Apps} | Config].
+    [{suite_apps, Apps}, {cacertfile, CACertfile} | Config].
 
 end_per_suite(Config) ->
     {ok, _} = emqx:remove_config([gateway, mqttsn]),
@@ -210,7 +219,7 @@ t_connect_dtls(Config) ->
         binary,
         {active, false},
         {protocol, dtls},
-        {cacertfile, filename:join(?config(data_dir, Config), "ca.crt")}
+        {cacertfile, ?config(cacertfile, Config)}
         | emqx_common_test_helpers:ssl_verify_fun_allow_any_host()
     ],
     {ok, Socket} = ssl:connect(?HOST, 1885, ClientOpts, 1000),

apps/emqx_gateway_mqttsn/test/emqx_sn_protocol_SUITE_data/ca.crt

@@ -1,20 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDUTCCAjmgAwIBAgIJAPPYCjTmxdt/MA0GCSqGSIb3DQEBCwUAMD8xCzAJBgNV
-BAYTAkNOMREwDwYDVQQIDAhoYW5nemhvdTEMMAoGA1UECgwDRU1RMQ8wDQYDVQQD
-DAZSb290Q0EwHhcNMjAwNTA4MDgwNjUyWhcNMzAwNTA2MDgwNjUyWjA/MQswCQYD
-VQQGEwJDTjERMA8GA1UECAwIaGFuZ3pob3UxDDAKBgNVBAoMA0VNUTEPMA0GA1UE
-AwwGUm9vdENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzcgVLex1
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-MjtbLayH9hGmpQrI5c2vmHQ2reRZnSFbY+2b8SXZ+3lZZgz9+BaQYWdQWfaUWEHZ
-uDaNiViVO0OT8DRjCuiDp3yYDj3iLWbTA/gDL6Tf5XuHuEwcOQUrd+h0hyIphO8D
-tsrsHZ14j4AWYLk1CPA6pq1HIUvEl2rANx2lVUNv+nt64K/Mr3RnVQd9s8bK+TXQ
-KGHd2Lv/PALYuwIDAQABo1AwTjAdBgNVHQ4EFgQUGBmW+iDzxctWAWxmhgdlE8Pj
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-88IGU8/wJCx3Ds2yc8+oBg/ynxG8f/HmCC1ET6EHHoe2jlo8FpU/SgGtghS1YL30
-IWxNsPrUP+XsZpBJy/mvOhE5QXo6Y35zDqqj8tI7AGmAWu22jg==
------END CERTIFICATE-----

apps/emqx_gateway_mqttsn/test/emqx_sn_protocol_SUITE_data/dtls.server.crt

@@ -1,19 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDEzCCAfugAwIBAgIBAjANBgkqhkiG9w0BAQsFADA/MQswCQYDVQQGEwJDTjER
-MA8GA1UECAwIaGFuZ3pob3UxDDAKBgNVBAoMA0VNUTEPMA0GA1UEAwwGUm9vdENB
-MB4XDTIwMDUwODA4MDcwNVoXDTMwMDUwNjA4MDcwNVowPzELMAkGA1UEBhMCQ04x
-ETAPBgNVBAgMCGhhbmd6aG91MQwwCgYDVQQKDANFTVExDzANBgNVBAMMBlNlcnZl
-cjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALNeWT3pE+QFfiRJzKmn
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-Aoy8qQEOWFDsZc/5UzhXUnb6LXr3qTkFEjNmhj+7uzv/lbBxlUG1NlYzSeOB6/RT
-8zH/lhOeKhLnWYPXdXKsa1FL6ij4X8DeDO1kY7fvAGmBn/THh1uTpDizM4YmeI+7
-4dmayA5xXvARte5h4Vu5SIze7iC057N+vymToMk2Jgk+ZZFpyXrnq+yo6RaD3ANc
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-iGMfEVFju69cO4oyokWv+hl5eCMkHBf14Kv51vj448jowYnF1zmzn7SEzm5Uzlsa
-sqjtAprnLyof69WtLU1j5rYWBuFX86yOTwRAFNjm9fvhAcrEONBsQtqipBWkMROp
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-KB5mN+iQaE+Oe2cpGKZJiJRdM+IqDDQ=
------END CERTIFICATE-----

apps/emqx_gateway_mqttsn/test/emqx_sn_protocol_SUITE_data/dtls.server.key

@@ -1,27 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIIEowIBAAKCAQEAs15ZPekT5AV+JEnMqacAxStajcraP9Obf5eeXpYvPrv/Stxi
-sltsq9Le7JE/+y1fJcQrD0J6nJDVWIFUWRYCjLypAQ5YUOxlz/lTOFdSdvotevep
-OQUSM2aGP7u7O/+VsHGVQbU2VjNJ44Hr9FPzMf+WE54qEudZg9d1cqxrUUvqKPhf
-wN4M7WRjt+8AaYGf9MeHW5OkOLMzhiZ4j7vh2ZrIDnFe8BG17mHhW7lIjN7uILTn
-s36/KZOgyTYmCT5lkWnJeuer7KjpFoPcA1yWtzgVt5RBnlrmzlLGCz1rRjdYwb7t
-zlWdVdxuMFHP9qrY206dBCOKQopADwYXTzQFCQIDAQABAoIBAQCuvCbr7Pd3lvI/
-n7VFQG+7pHRe1VKwAxDkx2t8cYos7y/QWcm8Ptwqtw58HzPZGWYrgGMCRpzzkRSF
-V9g3wP1S5Scu5C6dBu5YIGc157tqNGXB+SpdZddJQ4Nc6yGHXYERllT04ffBGc3N
-WG/oYS/1cSteiSIrsDy/91FvGRCi7FPxH3wIgHssY/tw69s1Cfvaq5lr2NTFzxIG
-xCvpJKEdSfVfS9I7LYiymVjst3IOR/w76/ZFY9cRa8ZtmQSWWsm0TUpRC1jdcbkm
-ZoJptYWlP+gSwx/fpMYftrkJFGOJhHJHQhwxT5X/ajAISeqjjwkWSEJLwnHQd11C
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-Ep9WP7F5iJyagYqIZtz+4uf7gBvUDdmvXz3sGr1VAoGAdXTD6eeKeiI6PlhKBztF
-zOb3EQOO0SsLv3fnodu7ZaHbUgLaoTMPuB17r2jgrYM7FKQCBxTNdfGZmmfDjlLB
-0xZ5wL8ibU30ZXL8zTlWPElST9sto4B+FYVVF/vcG9sWeUUb2ncPcJ/Po3UAktDG
-jYQTTyuNGtSJHpad/YOZctkCgYBtWRaC7bq3of0rJGFOhdQT9SwItN/lrfj8hyHA
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-vCppnoIw6S5BBvHwPP+uIhUX2bsi/dm8vu8tb+gSvo4PkwtFhEr6I9HglBKmcmog
-q6waEQKBgHyecFBeM6Ls11Cd64vborwJPAuxIW7HBAFj/BS99oeG4TjBx4Sz2dFd
-rzUibJt4ndnHIvCN8JQkjNG14i9hJln+H3mRss8fbZ9vQdqG+2vOWADYSzzsNI55
-RFY7JjluKcVkp/zCDeUxTU3O6sS+v6/3VE11Cob6OYQx3lN5wrZ3
------END RSA PRIVATE KEY-----