Feature #6439: New Transformation: to_lowercase - Suricata - Open Information Security Foundation

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Feature #6439

closed

New Transformation: to_lowercase

Added by Brandon Murphy about 1 year ago. Updated about 1 year ago.

Status:

Closed

Priority:

Normal

Assignee:

Jeff Lucovsky

Target version:

8.0.0-beta1

Effort:

Difficulty:

Label:

Description

Hoping to get a to_lowercase transformation that can be combined with others. The use case is to allow for the "normalization" of a mixed case URL to lowercase. This would allow the url to be obfuscated and account for multiple variations of casing within the field.

http.uri; to_lowercase; to_sha256; content:"<sha256 digest>";

Subtasks 1 (0 open — 1 closed)

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Updated by Victor Julien about 1 year ago

Status changed from New to Assigned
Assignee changed from OISF Dev to Jeff Lucovsky
Target version changed from TBD to 8.0.0-beta1

@Brandon Murphy would you see value in a "to_uppercase" as well?

@Jeff Lucovsky we can probably target 7 as well, as there should be no side effects of adding this.

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Updated by Brandon Murphy about 1 year ago

@Brandon Murphy would you see value in a "to_uppercase" as well?

I cannot currently think of any use cases for that. If it's only a trivial amount of additional work, then why not include it? I'd much rather have it and not need it than the other way around.

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Updated by Jeff Lucovsky about 1 year ago

Status changed from Assigned to In Progress

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Updated by Brandon Murphy about 1 year ago

just wanting to mention, this transformation could be used to address case differences between HTTP/1 and HTTP/2 assuming content matches can be updated/change to reflect the transformation behavior.

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