File Content Extraction 25.4
Filter SDK C Programming Guide

# Extract Protected Container Files

This section describes how to extract container files that are protected with a password or require other types of credentials.

The following guidelines apply to specific file types.

- Lotus Notes NSF files. If you are running a Notes client with an active user connected to a Domino server, you must specify the user’s password as a credential regardless of whether the NSF files you are opening are protected. This enables File Content Extraction to access the Notes client and the Lotus Notes API. If the Notes client is not running with an active user, the password is not required.
- PST files. To open password-protected PST files that use high encryption (Microsoft Outlook 2003 only), you must use the MAPI-based PST reader (`pstsr`). The native PST reader (`pstxsr`) does not support files that use high encryption and returns the error `KVERR_PasswordProtected` if a PST file is encrypted with high encryption.

To supply credentials for opening protected container files

- In the C API, you specify credentials per-file. Define the credential information in a KVOpenFileArg data structure, before you pass it to fpOpenFile() or fpOpenFileFromFilterSession().

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Version 25.4 | Last updated October 2025

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Product: File Content Extraction 25.4

Topic Title: Extract Protected Container Files