OidcEncryption#generateMasterPassword check file system support pos…

…ix before setting permission (helidon-io#8296)

* check file system support posix before setting permission

Signed-off-by: tvallin <thibault.vallin@oracle.com>

* Add debug logging

Signed-off-by: tvallin <thibault.vallin@oracle.com>

* review changes

Signed-off-by: tvallin <thibault.vallin@oracle.com>

* do not set file permission on windows

Signed-off-by: tvallin <thibault.vallin@oracle.com>

---------

Signed-off-by: tvallin <thibault.vallin@oracle.com>

security/providers/oidc-common/src/main/java/io/helidon/security/providers/oidc/common/OidcEncryption.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2023 Oracle and/or its affiliates.
+ * Copyright (c) 2021, 2024 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,7 +82,9 @@ private static char[] generateMasterPassword() {
             String password = UUID.randomUUID().toString();
             try {
                 Files.writeString(path, password, StandardCharsets.UTF_8, StandardOpenOption.CREATE_NEW);
-                Files.setPosixFilePermissions(path, Set.of(PosixFilePermission.OWNER_READ, PosixFilePermission.OWNER_WRITE));
+                if (path.getFileSystem().supportedFileAttributeViews().contains("posix")) {
+                    Files.setPosixFilePermissions(path, Set.of(PosixFilePermission.OWNER_READ, PosixFilePermission.OWNER_WRITE));
+                }
             } catch (IOException e) {
                 throw new SecurityException("Failed to create OIDC secret " + path.toAbsolutePath(), e);
             }