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CRLREFRESH(1)                                                                                  CRLREFRESH(1)



NAME
       crlrefresh - update and maintain system-wide CRL cache

SYNOPSIS
       crlrefresh  command [command-args] [options] crlrefresh r [options] crlrefresh f URL [options] crlre-fresh crlrefresh
       fresh F URI [options]

CRLREFRESH COMMAND SUMMARY
       r Refresh the entire CRL cache f Fetch a CRL from specified URL F Fetch a Certificate from  specified
       URL

DESCRIPTION
       Crlrefresh  is  a  UNIX  command-line program which is used to refresh and update the contents of the
       system-wide cache of Certificate Revocation Lists (CRLs). CRLs, which are optionally used as part  of
       the  procedure  for  verifying X.509 certificates, are typically fetched from the network using a URL
       which appears in (some) certificates. Caching CRLs is an  optimization  to  avoid  costs  of  network
       latency  and/or  unavailability.  Each  CRL  has a finite validity time which is specified in the CRL
       itself. This validity time may be as short as one day, or it may be much longer. Crlrefresh  examines
       the contents of the CRL cache and updates - via network fetch - all CRLs which are currently, or will
       soon be, invalid.  Crlrefresh is also use to fetch specific CRLs and certificates from  the  network;
       CRLs  fetched via crlrefresh will be added to the CRL cache as well as provided to the specified out-put output
       put file (or to stdout if no output file is provided). The URL specified in the f and F commands must
       have schema "http:" or "ldap:".  Typically, crlrefresh would be run on a regular basis via one of the
       configuration files used by the cron(8) program.

CRLREFRESH OPTION SUMMARY
       s=stale_period
              Specify the time in days which, having elapsed after a CRL is expired, that the CRL is deleted
              fromt he CRL cache. The default is 10 days.

       o=expire_overlap
              Specify  the time in seconds prior to a CRL's expiration when a refresh action will attempt to
              replace the CRL with a fresh copy.

       p      Purge all entries from the CRL cache, ensuring refresh with fresh CRLs. Normally,  CRLs  whose
              expiration date is more than expire_overlap past the current time are not refreshed.

       f      Perform  full  cryptographic  verification of all CRLs in the CRL cache. Normally this step is
              only performed when a CRL is actually used to validate a certificate.

       k=keychain_name
              The full path to the CRL cache (which is always a keychain). The default is  /var/db/crls/crl-cache.db. /var/db/crls/crlcache.db.
              cache.db.

       v      Provide verbose output during operation.

       F=output_file_name
              When fetching a CRL or certificate, specifies the destination to which the fetched entity will
              be written. If this is not specified then the fetched entity is sent to stdout.

       n      When fetching a CRL, this inhibits the addition of the fetched CRL to the system CRL cache.

       v      Execute in verbose mode.

FILES
       /var/db/crls/crlcache.db System CRL cache database

SEE ALSO
       cron(8)



Apple Computer, Inc.                           April 13, 2004                                  CRLREFRESH(1)