[openssl/openssl] e133f8: doc: note that PBKDF2 does not support XOF digests

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kovan

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Feb 13, 2026, 9:39:38 AMFeb 13
to openssl...@openssl.org
Branch: refs/heads/master
Home: https://github.com/openssl/openssl
Commit: e133f84ee9fffb15572e734791f0a139b25647a2
https://github.com/openssl/openssl/commit/e133f84ee9fffb15572e734791f0a139b25647a2
Author: kovan <xau...@gmail.com>
Date: 2026-02-13 (Fri, 13 Feb 2026)

Changed paths:
M doc/man7/EVP_KDF-PBKDF2.pod

Log Message:
-----------
doc: note that PBKDF2 does not support XOF digests

PBKDF2 uses HMAC internally, which does not support eXtendable Output
Function (XOF) digests such as SHAKE128 or SHAKE256. Document this
limitation to prevent user confusion when attempting to use XOF
digests with PBKDF2.

Fixes #22877

Co-Authored-By: Claude Opus 4.5 <nor...@anthropic.com>

Reviewed-by: Paul Dale <paul...@oracle.com>
Reviewed-by: Shane Lontis <shane....@oracle.com>
Reviewed-by: Tomas Mraz <to...@openssl.org>
MergeDate: Fri Feb 13 14:39:07 2026
(Merged from https://github.com/openssl/openssl/pull/29792)



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