SLAPPW-ARGON2(5) File Formats Manual SLAPPW-ARGON2(5)
NAME
slappw-argon2 - Argon2 password module to slapd
SYNOPSIS
/etc/ldap/slapd.conf
moduleload argon2 [<parameters>]
DESCRIPTION
The argon2 module to slapd(8) provides support for the use of the key
derivation function Argon2, that was selected as the winner of the
Password Hashing Competition in July 2015, in hashed passwords in
OpenLDAP.
It does so by providing the additional password scheme {ARGON2} for use
in slapd.
CONFIGURATION
The argon2 module does not need any configuration, but it can be con-
figured by giving the following parameters:
m=<memory>
Set memory usage to <memory> kiB.
p=<parallelism>
Set parallelism to <parallelism> threads. Currently supported
only when linked with libargon2.
t=<iterations>
Set the number of iterations to <iterations>.
These replace defaults when preparing hashes for new passwords where
possible.
After loading the module, the password scheme {ARGON2} will be recog-
nised in values of the userPassword attribute.
You can then instruct OpenLDAP to use this scheme when processing the
LDAPv3 Password Modify (RFC 3062) extended operations by using the
password-hash option in slapd.conf(5):
password-hash {ARGON2}
NOTES
If you want to use the scheme described here with slappasswd(8), remem-
ber to load the module using its command line options. The relevant
option/value is:
-o module-load=argon2
Or if non-default parameters are required:
-o module-load="argon2 [<param>...]"
Depending on argon2's location, you may also need:
-o module-path=pathspec
EXAMPLES
Both userPassword LDAP attributes below encode the password 'secret'
using different salts:
userPassword: {ARGON2}$argon2i$v=19$m=4096,t=3,p=1$c2FsdHNhbHQ$DKlexoEJUoZTmkAAC3SaMWk30El9/RvVhlqGo6afIng
userPassword: {ARGON2}$argon2i$v=19$m=4096,t=3,p=1$c2FsdHNhbHRzYWx0$qOCkx9nMeFlaGOO4DUmPDgrlUbgMMuO9T1+vQCFuyzw
SEE ALSO
slapd.conf(5), ldappasswd(1), slappasswd(8), ldap(3),
"OpenLDAP Administrator's Guide" ⟨http://www.OpenLDAP.org/doc/⟩
ACKNOWLEDGEMENTS
This manual page has been written by Peter Marschall based on the mod-
ule's README file written by Simon Levermann ⟨simon@levermann.de⟩.
OpenLDAP is developed and maintained by The OpenLDAP Project
⟨http://www.openldap.org/⟩. OpenLDAP is derived from University of
Michigan LDAP 3.3 Release.
OpenLDAP 2.5.13+dfsg-5 2022/07/14 SLAPPW-ARGON2(5)
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