(ITS#7269) [PATCH] Make slapd-sha2 module thread-safe

[fumiyas@osstech.co.jp]

Full_Name: SATOH Fumiyasu
Version: master
OS: 
URL: ftp://ftp.openldap.org/incoming/openldap-2.4.31-sha2-multithread.patch
Submission from: (NULL) (125.2.180.244)


In contrib/slapd-modules/passwd/sha2/slapd-sha2.c:sha*_hex_hash(),
a static buffer "static char real_hash[]" is declared and is
used by threads, but it is not TLS (Thread Local Storage) and
no lock.

This patch removes sha*_hex_hash() and replaces chk_sha*() with
libraries/liblutil/passwd.c:chk_sha1() implementation to
fix this problem.