[jira] [Commented] (TIKA-4091) OLE2 / CFB entry names should be treated case-insensitively

["Tim Allison (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TIKA-4091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17754640#comment-17754640 ] 

Tim Allison commented on TIKA-4091:
-----------------------------------

I made one more change locally, and I'm running the regression tests now.

> OLE2 / CFB entry names should be treated case-insensitively
> -----------------------------------------------------------
>
>                 Key: TIKA-4091
>                 URL: https://issues.apache.org/jira/browse/TIKA-4091
>             Project: Tika
>          Issue Type: Bug
>    Affects Versions: 2.8.0
>            Reporter: Ross Johnson
>            Priority: Major
>         Attachments: protected - normal case.docx, protected - upper case.docx, simple - lower case.doc, simple - normal case.doc, simple - upper case.doc
>
>
> According to section [2.6.1 of MS-CFB|https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-cfb/60fe8611-66c3-496b-b70d-a504c94c9ace], entries (whether they be "storage" or "stream" nodes) should be located with a special case-insensitive uppercase mapping. I believe Tika is using a case-sensitive approach, e.g. when looking for certain OLE2 objects in POIFSContainerDetector.java. The result is that Tika may perform incomplete or otherwise subpar type detection on OLE2 files, as well as provide incomplete metadata & extracted text output.
> Attached are some sample documents. The 3 "simple" ones demonstrate incomplete metadata & text extraction. These 3 files are equivalent except for the casing of the OLE2 names. Word opens all normally and shows the correct metadata. Tika output is missing all metadata and document content for the "upper case" and "lower case" variants.
> The two "protected" examples are again equivalent, except for the casing. Tika gives an EncryptedDocumentException for "protected - normal case.docx" but not for "protected - upper case.docx". The password for these 2 files is "password".



--
This message was sent by Atlassian Jira
(v8.20.10#820010)