Conditionall check for ms_tls13kdf build tag (#10160)

Author: ycombinator

dev-tools/packaging/testing/package_test.go

@@ -844,13 +844,12 @@ func checkFIPS(t *testing.T, agentPackageRootDir string) {
 				case "-tags":
 					foundTags = true
 					require.Contains(t, setting.Value, "requirefips")
-					// the check on ms_tls13kdf is no longer needed for go >= 1.25
-					// It should probably be conditioned to the output of `go version <binary>`
-					// for example:
-					// go version elastic-agent-9.2.0-SNAPSHOT-linux-x86_64/data/elastic-agent-7b3817/components/apm-server
-					// elastic-agent-9.2.0-SNAPSHOT-linux-x86_64/data/elastic-agent-7b3817/components/apm-server: go1.25.1
-					//
-					// require.Contains(t, setting.Value, "ms_tls13kdf")
+
+					// Check if the ms_tls13kdf build tag is set only if the binary was built
+					// with go1.24.x (see https://github.com/microsoft/go/pull/1662).
+					if strings.HasPrefix(info.GoVersion, "go1.24") {
+						require.Contains(t, setting.Value, "ms_tls13kdf")
+					}
 					continue
 				case "GOEXPERIMENT":
 					foundExperiment = true