  pam_timestamp — Authenticate using cached successful authentication attempts

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DESCRIPTION

   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.

   The default encryption hash is taken from the HMAC_CRYPTO_ALGO variable
   from /etc/login.defs.

OPTIONS

   timestampdir=directory

   Specify an alternate directory where pam_timestamp creates timestamp
   files.

   timestamp_timeout=number

   How long should pam_timestamp treat timestamp as valid after their last
   modification date (in seconds). Default is 300 seconds.

   verbose

   Attempt to inform the user when access is granted.

   debug

   Turns on debugging messages sent to syslog(3).

NOTES

   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.

EXAMPLES

 auth sufficient pam_timestamp.so verbose
 auth required   pam_unix.so

 session required pam_unix.so
 session optional pam_timestamp.so


AUTHOR

   pam_timestamp was written by Nalin Dahyabhai.
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