# pm-jacookie1.rc -- Generate unique id from INPUT variable.
# $Id: pm-jacookie1.rc,v 2.5 2004/04/04 16:59:05 jaalto Exp $
#
#   File id
#
#       .Copyright (C)  1997-2004 Jari Aalto
#       .$Keywords:     procmail cookieMake subroutine $
#
#       This code is free software in terms of GNU Gen. pub. Lic. v2 or later
#	Refer to http://www.gnu.org/copyleft/gpl.html
#
#   Description
#
#       When given a string, this subroutine returns a unique number
#       representing a string, a cookie.
#
#   Required settings
#
#       (none)
#
#   Call arguments (variables to set before calling)
#
#       o   INPUT, String from which the magic-cookie is calculated
#       o   JA_COOKIE_CMD: shell command to read INPUT and return decimal
#           or hex cookie string as one continuous block of characters.
#           It decaults to HP-UX `cksum', but your system may have `md5'
#           or `chksum'
#
#   Return values
#
#       o   Variable OUTPUT will contain the cookie.
#
#   Example usage
#
#           INPUT           = "foo@site.com"
#           JA_COOKIE_CMD   = "md5"     # or chksum
#           INCLUDERC       = $PMSRC/pm-jacookie1.rc
#           cookie          = $OUTPUT
#
#   Change Log: (none)


id    = "pm-jacookie1.rc"
dummy = "
======================================================================
$id: init:
"


# ........................................................... &input ...

#   This is standard CRC 32

JA_COOKIE_CMD        = ${JA_COOKIE_CMD:-"cksum"}

# ........................................................... &do-it ...

#   Generate new key for this new user

OUTPUT = `echo $INPUT | $JA_COOKIE_CMD`


#   - At least HP-UX cksum produces two values: CRC DATA-LEN
#   - We're only interested in the CRC part
#
:0
* OUTPUT ?? ^^\/[0-9a-f]+
{
    OUTPUT = $MATCH
}

dummy = "$id: end:"


# pm-store.rc ends here