man/man7/pam_smb_passwd.7

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 PAM_SMB_PASSWD 7 "August 19, 2023"
 NAME
pam_smb_passwd - SMB password management module
 SYNOPSIS
pam_smb_passwd.so.1


 DESCRIPTION
The pam_smb_passwd module enhances the PAM password management stack.
This functionality supports the changing or adding of SMB passwords for local
users. The CIFS server uses SMB passwords to authenticate
connected users. This module includes the pam_sm_chauthtok(3PAM)
function.

The pam_sm_chauthtok() function accepts the following flags:
PAM_PRELIM_CHECK

Always returns PAM_IGNORE.


PAM_SILENT

Suppresses messages.


PAM_UPDATE_AUTHTOK

Updates or creates a new CIFS local LM/NTLM hash for the user
that is specified in PAM_USER by using the authentication information
found in PAM_AUTHTOK. The LM hash is only created if the
smbd/lmauth_level property value of the smb/server service is set
to 3 or less. PAM_IGNORE is returned if the user is not in the local
/etc/passwd repository.


The following options can be passed to the pam_smb_passwd module:
debug

Produces syslog(3C) debugging information at the LOG_AUTH or
LOG_DEBUG level.


nowarn

Suppresses warning messages.


 FILES
/var/smb/smbpasswd

Stores SMB passwords for users.


 ERRORS
Upon successful completion of pam_sm_chauthtok(), PAM_SUCCESS is
returned. The following error codes are returned upon error:
PAM_AUTHTOK_ERR

Authentication token manipulation error


PAM_AUTHTOK_LOCK_BUSY

SMB password file is locked


PAM_PERM_DENIED

Permissions are insufficient for accessing the SMB password file


PAM_SYSTEM_ERR

System error


PAM_USER_UNKNOWN

User is unknown


 ATTRIBUTES
See the attributes(7) man page for descriptions of the following
attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed
MT Level MT-Safe with exceptions


 SEE ALSO
 syslog (3C),  libpam (3LIB),  pam (3PAM),  pam_chauthtok (3PAM),  pam_sm (3PAM),  pam_sm_chauthtok (3PAM),  pam.conf (5),  attributes (7),  smbd (8)  NOTES
The interfaces in libpam(3LIB) are MT-Safe only if each thread within the
multi-threaded application uses its own PAM handle.

The pam_smb_passwd.so.1 module should be stacked following all password
qualification modules in the PAM password stack.