bufferIndex += 8 + 4 * this.ownerUserSid.sub_authority_count;
        }

        if (ownerGOffset > 0) {
            bufferIndex = start + ownerGOffset;
            this.ownerGroupSid = new SID(buffer, bufferIndex);
            bufferIndex += 8 + 4 * this.ownerGroupSid.sub_authority_count;
        }

        bufferIndex = start + daclOffset;

        if (daclOffset > 0) {

            assertEquals("S-1-5-10-20", sid.toString());
        }

        @Test
        @DisplayName("Binary constructor with invalid sub_authority_count throws RuntimeCIFSException")
        void testBinaryConstructorInvalidCount() {
            // Arrange: second byte is sub_authority_count > 100
            byte[] bytes = new byte[1 + 1 + 6];
            bytes[0] = 1; // revision
            bytes[1] = (byte) 101; // invalid count

        buffer.put((byte) 0x01); // SubAuthorityCount
        buffer.put(new byte[] { 0, 0, 0, 0, 0, 1 }); // IdentifierAuthority
        buffer.putInt(0); // SubAuthority

        // Group SID at offset 40
        buffer.position(40);
        buffer.put((byte) 0x01); // Revision
        buffer.put((byte) 0x01); // SubAuthorityCount
        buffer.put(new byte[] { 0, 0, 0, 0, 0, 2 }); // IdentifierAuthority