Edit: /usr/share/doc/pam/txts/README.pam_userdb (2973B)
pam_userdb -- PAM module to authenticate against a db database
--------------------------------------------------------------------------
DESCRIPTION
The pam_userdb module is used to verify a username/password pair against
values stored in a Berkeley DB database. The database is indexed by the
username, and the data fields corresponding to the username keys are the
passwords.
OPTIONS
crypt=[crypt|none]
Indicates whether encrypted or plaintext passwords are stored in
the database. If it is crypt, passwords should be stored in the
database in crypt(3) form. If none is selected, passwords should
be stored in the database as plaintext.
db=/path/database
Use the /path/database database for performing lookup. There is no
default; the module will return PAM_IGNORE if no database is
provided. Note that the path to the database file should be
specified without the .db suffix.
debug
Print debug information. Note that password hashes, both from db
and computed, will be printed to syslog.
dump
Dump all the entries in the database to the log. Don't do this by
default!
icase
Make the password verification to be case insensitive (ie when
working with registration numbers and such). Only works with
plaintext password storage.
try_first_pass
Use the authentication token previously obtained by another module
that did the conversation with the application. If this token can
not be obtained then the module will try to converse. This option
can be used for stacking different modules that need to deal with
the authentication tokens.
use_first_pass
Use the authentication token previously obtained by another module
that did the conversation with the application. If this token can
not be obtained then the module will fail. This option can be used
for stacking different modules that need to deal with the
authentication tokens.
unknown_ok
Do not return error when checking for a user that is not in the
database. This can be used to stack more than one pam_userdb
module that will check a username/password pair in more than a
database.
key_only
The username and password are concatenated together in the
database hash as 'username-password' with a random value. if the
concatenation of the username and password with a dash in the
middle returns any result, the user is valid. this is useful in
cases where the username may not be unique but the username and
password pair are.
EXAMPLES
auth sufficient pam_userdb.so icase db=/etc/dbtest
AUTHOR
pam_userdb was written by Cristian Gafton >gafton@redhat.com<.