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dn: olcDatabase={-1}frontend,cn=config add: olcPasswordHash olcPasswordHash: {SSHA}
Although I applied both of these config, I don't think the latter solve my initial pb , I guess 1st one was sufficient . that second (olcPasswordHash: {SSHA}) is only necessary to force SSHA hash when user change their password ?
{SSHA} is the default, and is not {SSHA512}
If you want it to force SSHA512 for any new password changes done via an LDAP v3 password modify operation, you must set it to {SSHA512} instead of {SSHA}.
I would note that starting with OpenLDAP 2.4.50, ARGON2 password hashes are supported the argon2 password module, and they are considered more secure than SSHA512.
Regards, Quanah
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Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com