feat(fips): do not set insecure defaults in fips mode

transport/tlscommon/versions_default.go

@@ -59,20 +59,6 @@ var tlsProtocolVersions = map[string]TLSVersion{
 	"TLSv1.3": TLSVersion13,
 }
 
-// SetInsecureDefaults is currently a nop as the default versions have not changed.
-//
-// This function is used to avoid a breaking change on previous releases.
-// We plan on the default minimum versions list to exclude TLS1.1, and not allow TLS1.0 in a future library update.
-func SetInsecureDefaults() {
-	TLSVersionMin = TLSVersion10
-	TLSVersionDefaultMin = TLSVersion11
-	TLSDefaultVersions = []TLSVersion{
-		TLSVersion11,
-		TLSVersion12,
-		TLSVersion13,
-	}
-}
-
 // Intended for ECS's tls.version_protocol_field, which does not include
 // numeric version and should be lower case
 type TLSVersionDetails struct {

transport/tlscommon/versions_fips.go

@@ -0,0 +1,24 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build requirefips
+
+package tlscommon
+
+func SetInsecureDefaults() {
+	// noop, use secure defaults in fips
+}

transport/tlscommon/versions_nofips.go

@@ -0,0 +1,31 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build !requirefips
+
+package tlscommon
+
+// This function is used to avoid a breaking change on previous releases.
+func SetInsecureDefaults() {
+	TLSVersionMin = TLSVersion10
+	TLSVersionDefaultMin = TLSVersion11
+	TLSDefaultVersions = []TLSVersion{
+		TLSVersion11,
+		TLSVersion12,
+		TLSVersion13,
+	}
+}