6.35. pam_timestamp - authenticate using cached successful authentication attempts
pam_timestamp.so [ timestampdir=
directory ] [ timestamp_timeout=
number ] [ verbose ] [ debug ]
In a nutshell, pam_timestamp caches successful authentication attempts, and allows you to use a recent successful attempt as the basis for authentication. This is similar mechanism which is used in sudo .
When an application opens a session using pam_timestamp , a timestamp file is created in the timestampdir directory for the user. When an application attempts to authenticate the user, a pam_timestamp will treat a sufficiently recent timestamp file as grounds for succeeding.
- Specify an alternate directory where pam_timestamp creates timestamp files.
- How long should pam_timestamp treat timestamp as valid after their last modification date (in seconds). Default is 300 seconds.
- Attempt to inform the user when access is granted.
- Turns on debugging messages sent to syslog(3).
session module types are provided.
- The module was not able to retrieve the user name or no valid timestamp file was found.
- Everything was successful.
- Timestamp file could not be created or updated.
Users can get confused when they are not always asked for passwords when running a given program. Some users reflexively begin typing information before noticing that it is not being asked for.
auth sufficient pam_timestamp.so verbose auth required pam_unix.so session required pam_unix.so session optional pam_timestamp.so
- timestamp files and directories
pam_timestamp was written by Nalin Dahyabhai.