[LU-16444] Fix null encryption for file names

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.3
• Affects Version/s: Lustre 2.16.0, Lustre 2.15.1
• Labels: encryption patch
• Severity: 3
• Assignee: Sebastien Buisson
• Reporter: Sebastien Buisson

Description

Support for "null" filename encryption must be fixed, as it does not properly handle the case of files whose name starts with a _, improperly considering them as encrypted+digested names.