Hello,

Executive summary: the plugin "/lib/dirsrv/plugins/libpwdchan-plugin.so"
is missing in
"/gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/"

I'm trying to setup a directory-server-service on Guix System using this
service definition in my operating-system:

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(service directory-server-service-type
        (directory-server-instance-configuration
         (slapd
          (slapd-configuration
           (root-password "{PBKDF2_SHA256}AAAgANjxkt+wBF[...]")))))

--8<---------------cut here---------------end--------------->8---

I'm using a PBKDF2_SHA256 sheme password (trimmed above) since AFAIU
it's more secure against brute force attacks; I generated the hash with
this command:

--8<---------------cut here---------------start------------->8---

pwdhash -s PBKDF2_SHA256 <password>

--8<---------------cut here---------------end--------------->8---

Please also consider that PBKDF2_SHA256 is the scheme used in the
example configuration of the Guix manual:
https://guix.gnu.org/manual/devel/en/html_node/LDAP-Services.html#index-LDAP_002c-server

After reconfiguring Guix System if I try to start the service I get:

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g@pistache ~$ sudo herd start directory-server-localhost
Password: 
PID file '/run/dirsrv/slapd-localhost.pid' did not show up; terminating process 15747.
Service directory-server-localhost could not be started.
herd: error: failed to start service directory-server-localhost

--8<---------------cut here---------------end--------------->8---

This is what I get in the log file
/var/log/dirsrv/slapd-localhost/errors:

--8<---------------cut here---------------start------------->8---

[14/Feb/2025:09:36:48.609619909 +0100] - ERR - symload_report_error - Netscape Portable Runtime error -5977: /gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so: cannot open shared object file: No such file or directory
[14/Feb/2025:09:36:48.634703449 +0100] - ERR - symload_report_error - Could not open library "/gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so" for plugin PBKDF2
[14/Feb/2025:09:36:48.668040691 +0100] - ERR - plugin_setup - "PBKDF2" plugin in library "libpwdchan-plugin" not initialized and ignored
[14/Feb/2025:09:36:48.693696064 +0100] - ERR - symload_report_error - Netscape Portable Runtime error -5977: /gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so: cannot open shared object file: No such file or directory
[14/Feb/2025:09:36:48.718060230 +0100] - ERR - symload_report_error - Could not open library "/gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so" for plugin PBKDF2-SHA1
[14/Feb/2025:09:36:48.743072672 +0100] - ERR - plugin_setup - "PBKDF2-SHA1" plugin in library "libpwdchan-plugin" not initialized and ignored
[14/Feb/2025:09:36:48.769131704 +0100] - ERR - symload_report_error - Netscape Portable Runtime error -5977: /gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so: cannot open shared object file: No such file or directory
[14/Feb/2025:09:36:48.793075389 +0100] - ERR - symload_report_error - Could not open library "/gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so" for plugin PBKDF2-SHA256
[14/Feb/2025:09:36:48.818071205 +0100] - ERR - plugin_setup - "PBKDF2-SHA256" plugin in library "libpwdchan-plugin" not initialized and ignored
[14/Feb/2025:09:36:48.844240257 +0100] - ERR - symload_report_error - Netscape Portable Runtime error -5977: /gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so: cannot open shared object file: No such file or directory
[14/Feb/2025:09:36:48.868061742 +0100] - ERR - symload_report_error - Could not open library "/gnu/store/rngdj26hcc22iwfllfpxkjyzpkc3mxnn-389-ds-base-2.2.2/lib/dirsrv/plugins/libpwdchan-plugin.so" for plugin PBKDF2-SHA512
[14/Feb/2025:09:36:48.893072834 +0100] - ERR - plugin_setup - "PBKDF2-SHA512" plugin in library "libpwdchan-plugin" not initialized and ignored

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Thank you! Gio'

-- 
Giovanni Biscuolo

Xelera IT Infrastructures