nixosTests.matrix-synapse: fix requests certificate validation by using minica instead of openssl

nixos/tests/matrix/synapse.nix

@@ -1,31 +1,15 @@
 import ../make-test-python.nix ({ pkgs, ... } : let
 
+  ca_key = mailerCerts.ca.key;
+  ca_pem = mailerCerts.ca.cert;
 
-  runWithOpenSSL = file: cmd: pkgs.runCommand file {
-    buildInputs = [ pkgs.openssl ];
-  } cmd;
-
-
-  ca_key = runWithOpenSSL "ca-key.pem" "openssl genrsa -out $out 2048";
-  ca_pem = runWithOpenSSL "ca.pem" ''
-    openssl req \
-      -x509 -new -nodes -key ${ca_key} \
-      -days 10000 -out $out -subj "/CN=snakeoil-ca"
+  bundle = pkgs.runCommand "bundle" {
+    nativeBuildInputs = [ pkgs.minica ];
+  } ''
+    minica -ca-cert ${ca_pem} -ca-key ${ca_key} \
+      -domains localhost
+    install -Dm444 -t $out localhost/{key,cert}.pem
   '';
-  key = runWithOpenSSL "matrix_key.pem" "openssl genrsa -out $out 2048";
-  csr = runWithOpenSSL "matrix.csr" ''
-    openssl req \
-       -new -key ${key} \
-       -out $out -subj "/CN=localhost" \
-  '';
-  cert = runWithOpenSSL "matrix_cert.pem" ''
-    openssl x509 \
-      -req -in ${csr} \
-      -CA ${ca_pem} -CAkey ${ca_key} \
-      -CAcreateserial -out $out \
-      -days 365
-  '';
-
 
   mailerCerts = import ../common/acme/server/snakeoil-certs.nix;
   mailerDomain = mailerCerts.domain;
@@ -82,8 +66,8 @@ in {
             host = "localhost";
             port = config.services.redis.servers.matrix-synapse.port;
           };
-          tls_certificate_path = "${cert}";
-          tls_private_key_path = "${key}";
+          tls_certificate_path = "${bundle}/cert.pem";
+          tls_private_key_path = "${bundle}/key.pem";
           registration_shared_secret = registrationSharedSecret;
           public_baseurl = "https://example.com";
           email = {
@@ -203,8 +187,8 @@ in {
         settings = {
           inherit listeners;
           database.name = "sqlite3";
-          tls_certificate_path = "${cert}";
-          tls_private_key_path = "${key}";
+          tls_certificate_path = "${bundle}/cert.pem";
+          tls_private_key_path = "${bundle}/key.pem";
         };
       };
     };
@@ -222,7 +206,7 @@ in {
         "journalctl -u matrix-synapse.service | grep -q 'Connected to redis'"
     )
     serverpostgres.require_unit_state("postgresql.service")
-    serverpostgres.succeed("register_new_matrix_user -u ${testUser} -p ${testPassword} -a -k ${registrationSharedSecret} https://localhost:8448/")
+    serverpostgres.succeed("REQUESTS_CA_BUNDLE=${ca_pem} register_new_matrix_user -u ${testUser} -p ${testPassword} -a -k ${registrationSharedSecret} https://localhost:8448/")
     serverpostgres.succeed("obtain-token-and-register-email")
     serversqlite.wait_for_unit("matrix-synapse.service")
     serversqlite.wait_until_succeeds(