pam_matrix - A PAM test module to retrieve module-specific PAM items
Testing PAM application often requires to set up an authentication backend with
as little effort as possible. The pam_matrix
module allows to
authenticate against a key-value text file, provided by an option or with an
pam_matrix is a test tool
. It should be considered completely insecure
and never used outside test environments! As you’ll see when reading
description of the options and actions, many of them don’t make any
sense in the real world and were added just to make tests possible.
The pam_matrix module authenticates user against a plain-text CSV file. The
format of the file is as follows:
Example: User bob allowed to authenticate with the service sshd
•passdb=/path/to/file - the
patch to the password database. If the database is not provided with this
module option, pam_matrix.so reads the PAM_MATRIX_PASSWD environment variable
and tries to load the file from there. If that fails as well,
PAM_AUTHINFO_UNAVAIL is returned.
•echo - if this option is
provided, pam_matrix.so will ask for password using PAM_PROMPT_ECHO_ON, that
is, the password will be echoed back to user. This option was added to make it
possible to test conversation functions better.
•verbose - if this option is
provided, pam_matrix.so will display a PAM_TEXT_INFO message when
authentication succeeds and a PAM_ERROR_MSG when authentication fails. This
option was added to make it possible to test conversation functions
All module types ( account
) are supported.
module searches for the user in the passdb file and compares the
provided password with the one in the passdb file.
module is able to update the password in the passdb file.
module compares the service name the PAM conversation was
invoked with the allowed service for the user as set in the passdb file.
module sets the HOMEDIR PAM environment variable to
"/home/%u" where %u stands for the user who opens the session. The
variable is unset on session close.
auth required pam_matrix.so passdb=/tmp/passdb verbose
account required pam_matrix.so passdb=/tmp/passdb verbose
password required pam_matrix.so passdb=/tmp/passdb verbose
session required pam_matrix.so passdb=/tmp/passdb verbose