fix: updated config file permission requirements for windows (#9732)

* fix: reduced config file permission restriction on windows

Signed-off-by: Soumya Ghosh Dastidar <gdsoumya@gmail.com>

* fix: updated localconfig tests to check error

Signed-off-by: Soumya Ghosh Dastidar <gdsoumya@gmail.com>

util/localconfig/file_perm_unix.go

@@ -0,0 +1,16 @@
+//go:build !windows
+
+package localconfig
+
+import (
+	"fmt"
+	"os"
+)
+
+func getFilePermission(fi os.FileInfo) error {
+	if fi.Mode().Perm() == 0600 || fi.Mode().Perm() == 0400 {
+		return nil
+	}
+	return fmt.Errorf("config file has incorrect permission flags:%s."+
+		"change the file permission either to 0400 or 0600.", fi.Mode().Perm().String())
+}

util/localconfig/file_perm_windows.go

@@ -0,0 +1,16 @@
+//go:build windows
+
+package localconfig
+
+import (
+	"fmt"
+	"os"
+)
+
+func getFilePermission(fi os.FileInfo) error {
+	if fi.Mode().Perm() == 0666 || fi.Mode().Perm() == 0444 {
+		return nil
+	}
+	return fmt.Errorf("config file has incorrect permission flags:%s."+
+		"change the file permission either to 0444 or 0666.", fi.Mode().Perm().String())
+}

util/localconfig/localconfig.go

@@ -311,11 +311,3 @@ func GetUsername(subject string) string {
 	}
 	return subject
 }
-
-func getFilePermission(fi os.FileInfo) error {
-	if fi.Mode().Perm() == 0600 || fi.Mode().Perm() == 0400 {
-		return nil
-	}
-	return fmt.Errorf("config file has incorrect permission flags:%s."+
-		"change the file permission either to 0400 or 0600.", fi.Mode().Perm().String())
-}

util/localconfig/localconfig_test.go

@@ -1,3 +1,5 @@
+//go:build !windows
+
 package localconfig
 
 import (
@@ -83,7 +85,7 @@ func TestFilePermission(t *testing.T) {
 			if err := getFilePermission(fi); err != nil {
 				assert.EqualError(t, err, c.expectedError.Error())
 			} else {
-				require.Nil(t, err)
+				require.Nil(t, c.expectedError)
 			}
 		})
 	}