migrated from GitLab to Gitea

- removed reference to the freeradius-privacyidea module as I have a better solution now

.gitignore

@@ -0,0 +1 @@
+*.pyc

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

README.md

@@ -0,0 +1,119 @@
+PrivacyID3A-CheckOTP
+====================
+
+Scripts implementing the [PrivacyID3A](http://www.privacyidea.org) OTP (One
+Time Password) check, one implemented as a shell script and the other in python,
+to integrate with [FreeRadius](http://www.freeradius.org) in environments where
+the FreeRadius Perl plugin is not available to use the standard check script
+(e.g. on OS X).
+
+**Version 2.0**, latest version, documentation and bugtracker available on my
+[Gitea instance](https://gitea.lindenaar.net/scripts/PrivacyID3A-CheckOTP)
+
+Copyright (c) 2015 - 2016 Frederik Lindenaar. free for distribution under the
+GNU License, see [below](#license)
+
+
+Introduction
+------------
+When integrating PrivacyIDEA with the stock OS X Server FreeRadius server, I got
+stuck as the OS X Server not including the FreeRadius `rlm_perl` module. At that
+time I created the shell-script `privacyidea-checkotp` to get around this using
+the available FreeRadius `rlm_exec` module. This solution suited my needs and
+may have glitches, though so far it turned out to be a stable solution.
+
+I have reimplemented this script in Python as drop-in replacement for the shell 
+script with better error handling and logging / debugging capabilities. The way
+to integrate it is the same as the shell script, the only change needed is the
+script name.
+
+In case you have any comments / questions or issues, please raise them through
+my [Gitea instance](https://gitea.lindenaar.net/scripts/PrivacyID3A-CheckOTP)
+so that others benefit.
+
+Setup
+-----
+Both scripts will be executed using the FreeRadius `rtl_exec` module, which is
+not the most efficient way to integrate but will suffice for low to medium
+volume use. The script depends on `curl` and `sed` being installed, which is
+the case in most environments.
+
+The setup of this solution consists of the following steps:
+
+  1. Setup PrivacyIDEA and make sure it is working on its own
+  2. Install the shell or python version of the script as `privacyidea-checkotp`
+     on your FreeRadius server and make it executable
+  3. Copy the provided `privacyidea.freeradiusmodule` into the FreeRadius
+     `raddb/modules` directory as `privacyidea`
+  4. Update `raddb/modules/privacyidea` so that `[WRAPPERSCRIPT_PATH]` points to
+     the script as installed in step #1 and `[PRIVACYIDEA_URL]` is replaced with
+     the base URL of your PrivacyIDEA instance.
+  5. Check your configuration by running the command configured in
+     `raddb/modules/privacyidea` followed by a username and valid
+     password/OTP/PIN combination (depending on your configuration.
+     To avoid the password being captured in your shell history, use `` `cat` ``
+     instead of the password on the commandline and after entering the command,
+     enter the password/OTP/PIN combination as PrivacyIDEA expects followed by
+     an enter and `CTRL-D`,
+     eg.: ```./privacyidea-checkotp https://server.tld/path username `cat -` ```
+  6. After successfully testing the base setup, add PrivacyIDEA as authorization
+     and authentication provider with the following steps:
+     1. Open the virtual host file you want to add PrivacyIDEA authentication to
+     (typically in `raddb/sites-available`)
+     2. In the section `authorize {`:
+        * disable all authorization modules you do not want to succeed
+        * add the following to the bottom of this section:
+
+          ~~~
+          # Use PrivacyIDEA
+          if(! Service-Type == "Outbound-User") {
+                update control {
+                        Auth-Type := PrivacyIDEA
+                }
+          }
+          else {
+                # Service-Type == "Outbound-User"
+                if(NAS-Port-Type == "Virtual" && NAS-Port > 0 ) {
+                        update control {
+                                Auth-Type := Accept
+                        }
+                }
+          }
+          ~~~
+
+     3. In the section `authenticate {`:
+        * Disable all authentication modules you do not want to succeed
+        * add the following to the top of this section so that PrivacyIDEA
+          authentication is tried first:
+
+          ~~~
+          Auth-Type PrivacyIDEA {
+                privacyidea
+          }
+          ~~~
+
+  7. Last step is to test the configuration, run FreeRadius as `radiusd -X` and
+     check what happens with an authentication requests reaching the FreeRadius
+     server. Specific requirements on what needs to happen is dependent on your
+     setup (e.g. I am normally not using any PIN codes for the OTP, but require
+     the user's password followed by the OTP).
+
+Please note that this setups works for plain-text (i.e. non-EAP) authentication
+with FreeRadius, which is what my setup needs. The configuration above does not
+work with EAP authentication, I am still working on that (any hints for that are
+welcome!)
+
+<a name="license">License</a>
+-----------------------------
+This script, documentation and configuration examples are free software: you can
+redistribute and/or modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation, either version 3 of the License,
+or (at your option) any later version.
+
+This script, documentation and configuration examples are distributed in the
+hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program.  If not, download it from <http://www.gnu.org/licenses/>.

privacyidea-checkotp

@@ -1,39 +1,35 @@
 #!/bin/bash
-
+#
 # privacyidea-checkotp	- shell implementation of the PrivacyIDEA OTP check for
 #			  integration with FreeRadius on systems without perl
 #
-# Version 1.0, latest version available from:
+# Version 1.1, latest version, documentation and bugtracker available at:
-#		https://gitlab.lindenaar.net/scripts/privacyidea-checkotp
+#		https://gitlab.lindenaar.net/privacyidea/checkotp
 #
 # Copyright (c) 2015 Frederik Lindenaar
 #
 # This script is free software: you can redistribute and/or modify it under the
-# terms of the GNU General Public License as published by the Free Software
+# terms of version 3 of the GNU General Public License as published by the Free
-# Foundation, either version 3 of the License, or (at your option) any later version.
+# Software Foundation, or (at your option) any later version of the license.
 #
-# This script is distributed in the hope that it will be useful, but WITHOUT ANY
+# This script is distributed in the hope that it will be useful but WITHOUT ANY
 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License along with
-# this program.  If not, see <http://www.gnu.org/licenses/>.
+# this program.  If not, visit <http://www.gnu.org/licenses/> to download it.
 
 # If called for the Outbound-User Service type, exit immediately (not supported)
 if [ "$SERVICE_TYPE" = "Outbound-User" ]; then
   exit 8
 fi
 
-# Simple script to validate an OTP with PrivacyIDEA
+# Obtain parameters from command line or environment variables
-
 if [ $# = 1 ]; then
   URL="$1/validate/check"
   LOGIN=`echo "${STRIPPED_USER_NAME:-$USER_NAME}" | sed 's/^"\(.*\)"$/\1/'`
   PASSWORD=`echo "$USER_PASSWORD" | sed 's/^"\(.*\)"$/\1/'`
   NAS=`echo "$NAS_IP_ADDRESS" | sed 's/^"\(.*\)"$/\1/'`
-#  LOGIN="${User-Name}"
-#  PASSWORD="${User-Password}"
-#  NAS="${NAS-IP-Address}"
 elif [ $# = 3 ]; then
   URL="$1/validate/check"
   LOGIN="$2"
@@ -49,9 +45,11 @@ else
   exit 2
 fi
 
+# Obtain the result using curl
 otpresult=`/usr/bin/curl -s "$URL" --data-urlencode "user=$LOGIN" --data-urlencode "pass=$PASSWORD" --data-urlencode "client=$NAS"`
 
-otpstatus=`echo $otpresult | sed 's/^{.*"result": { "status": true, "value": \(.*\) },.*}/\1/'`
+# Extract the status of the request from the returned JSON
+otpstatus=`echo $otpresult | sed 's/^{.*"result": *{ *"status": *true, *"value": *\(.*\) *},.*}/\1/'`
 
 if [ "$otpstatus" = "true" ]; then
 #  echo $LOGIN did authenticate $otpresult

privacyidea-checkotp.py

@@ -0,0 +1,222 @@
+#! /usr/bin/env python
+#
+# privacyidea-checkotp.py - python implementation of PrivacyIDEA OTP check for
+#			    command-line use or integration with FreeRadius
+#
+# Version 1.0, latest version, documentation and bugtracker available at:
+#		https://gitlab.lindenaar.net/privacyidea/checkotp
+#
+# Copyright (c) 2016 Frederik Lindenaar
+#
+# This script is free software: you can redistribute and/or modify it under the
+# terms of version 3 of the GNU General Public License as published by the Free
+# Software Foundation, or (at your option) any later version of the license.
+#
+# This script is distributed in the hope that it will be useful but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, visit <http://www.gnu.org/licenses/> to download it.
+
+import sys, os, logging, json
+from getpass import getpass
+from urllib import urlencode
+from urllib2 import Request, HTTPError, urlopen
+from argparse import ArgumentParser as StandardArgumentParser, FileType, \
+              _StoreAction as StoreAction, _StoreConstAction as StoreConstAction
+
+VERSION="2.0"
+PROG_NAME=os.path.splitext(os.path.basename(__file__))[0]
+PROG_VERSION=PROG_NAME + ' ' + VERSION
+URL_API_SUFFIX='/validate/check'
+ENV_VAR_USER='USER_NAME'
+ENV_VAR_USERSTRIPPED='STRIPPED_USER_NAME'
+ENV_VAR_PWD='USER_PASSWORD'
+ENV_VAR_NAS='NAS_IP_ADDRESS'
+LOG_FORMAT='%(levelname)s - %(message)s'
+LOG_FORMAT_FILE='%(asctime)s - ' + LOG_FORMAT
+LOGGING_RADIUS=logging.CRITICAL + 10
+LOGGING_NONE=logging.CRITICAL + 20
+
+# Setup logging
+logging.basicConfig(format=LOG_FORMAT)
+logging.addLevelName(LOGGING_RADIUS, 'RADIUS')
+logging.addLevelName(LOGGING_NONE, 'NONE')
+logger = logging.getLogger(PROG_NAME)
+logger.setLevel(logging.CRITICAL)
+
+
+################[ wrapper to stop ArgumentParser from exiting ]################
+# Stop ArgumentParser from exiting with an error message upon errors
+# based on http://stackoverflow.com/questions/14728376/i-want-python-argparse-to-throw-an-exception-rather-than-usage/14728477#14728477
+# the only way to do this seems overriding error() and raising an exception
+class ArgumentParserError(Exception): pass
+
+class ArgumentParser(StandardArgumentParser):
+    def error(self, message):
+        raise ArgumentParserError(message)
+
+##################[ Action to immediately set the log level ]##################
+class SetLogLevel(StoreConstAction):
+    """ArgumentParser action to set log level to provided const value"""
+    def __call__(self, parser, namespace, values, option_string=None):
+        logging.getLogger(PROG_NAME).setLevel(self.const)
+
+####################[ Action to immediately log to a file ]####################
+class SetLogFile(StoreAction):
+    """ArgumentParser action to log to file (sets up FileHandler accordingly)"""
+    def __call__(self, parser, namespace, values, option_string=None):
+        super(SetLogFile, self).__call__(parser,namespace,values,option_string)
+        formatter = logging.Formatter(LOG_FORMAT_FILE)
+        handler = logging.FileHandler(values)
+        handler.setFormatter(formatter)
+        logger = logging.getLogger(PROG_NAME)
+        logger.propagate = False
+        logger.addHandler(handler)
+
+###############################################################################
+
+
+def isempty(str):
+    """Checks whether a string is unset or empty"""
+    return str is None or len(str)== 0
+
+
+def envvar(name, default=None):
+    """Returns the value of environment value name"""
+    return os.environ.get(name, default)
+
+
+def dequote(str):
+    """Remove the starting and trailing quotes from a string, if both present"""
+    return str[1:-1] if not isempty(str) and str[0] == str[-1] == '"' else str
+
+
+def parse_args():
+    """Parse command line and get parameters from environment if not set"""
+
+    # Setup argument parser
+    parser = ArgumentParser(
+        description='check an OTP agains PrivacyIDEA from the command-line',
+        epilog='* parameter is required but can also be passed in environment '
+               'variables\n  %s and %s. Value for nas can be set in %s.'
+               'In case the value for password equals "-" it is read from stdin'
+               % (ENV_VAR_USER, ENV_VAR_PWD, ENV_VAR_NAS)
+    )
+    parser.add_argument('-V', '--version',action="version",version=PROG_VERSION)
+
+    parser.add_argument('url',             help='URL to PrivacyIDEA/LinOTP')
+    parser.add_argument('principal',       default=dequote(envvar(ENV_VAR_USERSTRIPPED, envvar(ENV_VAR_USER))),
+                        nargs='?',         help='user or token serial to login with *')
+    parser.add_argument('password',        default=dequote(envvar(ENV_VAR_PWD)),
+                        nargs='?',         help='password + OTP to authenticate with *')
+    parser.add_argument('nas',             default=dequote(envvar(ENV_VAR_NAS)),
+                        nargs='?',         help='ID of the Network Access System')
+
+    pgroup = parser.add_mutually_exclusive_group(required=False)
+    pgroup.add_argument('-q', '--quiet',   action=SetLogLevel, const=LOGGING_NONE,
+                        default=logging.CRITICAL,
+                        help='quiet (no output, only exit with exit code)')
+    pgroup.add_argument('-v', '--verbose', action=SetLogLevel, const=logging.INFO,
+                        help='more verbose output')
+    pgroup.add_argument('-d', '--debug',   action=SetLogLevel, const=logging.DEBUG,
+                        help='debug output (more verbose)')
+    pgroup.add_argument('-r', '--radius',  action=SetLogLevel, const=LOGGING_RADIUS,
+                        help='run in radius mode (only produce Radius output)')
+
+    parser.add_argument('-l', '--logfile', action=SetLogFile,
+                        help='send logging output to logfile')
+
+    pgroup = parser.add_mutually_exclusive_group()
+    pgroup.add_argument('-u', '--user',    action='store_false', dest='isserial',
+                        help='provided principal contains a login (default)')
+    pgroup.add_argument('-s', '--serial',  action='store_true', dest='isserial',
+                        help='provided principal contains a token serial')
+
+    parser.add_argument('-p', '--prompt',  action='store_true',
+                        help='prompt for password + OTP (not in Radius mode)')
+
+    # parse arguments
+    args = parser.parse_args()
+
+    # Post-process command line options
+    if args.prompt and not isempty(args.principal):
+        args.password = getpass("please enter password: " )
+    elif args.password == '-':
+        args.password = sys.stdin.readline().strip()
+
+    # We should now be ready to authenticate, fail if that's not the case
+    if isempty(args.principal) or isempty(args.password):
+        parser.error('user/serial and password are required!')
+
+    # if we got here all seems OK
+    return args
+
+
+def checkotp(url, subject, secret, isserial=False, nas=None):
+    """Check a subject (user or token) with secret against PrivacyIDEA / LinOTP.
+
+    Args:
+        url      (str) : URL to connect to, URL_API_SUFFIX is added if missing
+        subject  (str) : subject to authenticate (user or a token serial)
+        secret   (str) : secret (password+OTP) to authenticate with
+        isserial (bool): True if subject is a token serial (optional)
+        nas      (str) : string to pass-on as the nas string (optional)
+
+    Returns:
+        The result response from the PrivacyIDEA server (mapping object)
+    """
+    # Complete (fix) URL
+    if not url.endswith(URL_API_SUFFIX):
+        url += URL_API_SUFFIX[1:] if url[-1] == '/' else URL_API_SUFFIX
+    logger.info('connecting to %s', url)
+
+    # Prepare the parameters
+    params = { 'pass': secret, 'serial' if isserial else 'user': subject }
+    if not isempty(nas):
+        params['nas'] = nas
+    if logger.isEnabledFor(logging.DEBUG):
+        logger.debug('HTTP request parameters: %s',
+                     ', '.join(map(lambda (k,v): '%s="%s"' % (k, v if k!='pass'
+                                     else '***MASKED***'), params.iteritems())))
+
+     # Perform the API authentication request
+    response = json.load(urlopen(Request(url, data=urlencode(params))))
+    if logger.isEnabledFor(logging.DEBUG):
+        logger.debug('result: %s', json.dumps(response, indent=4))
+
+    return response
+
+
+####################[ command-line script implementation ]####################
+if __name__ == '__main__':
+
+    try:
+        args = parse_args()
+
+        response=checkotp(args.url, args.principal, args.password, args.isserial, args.nas)
+
+    except (ArgumentParserError, HTTPError) as e:
+        logger.critical('authentication failed: %s', e)
+        radius_result = (2, 'ERROR')
+
+    else:
+        resultdata = response.get('result')
+        authenticated = resultdata.get('status') and resultdata.get('value')
+        radius_result = (0, 'PrivacyIDEA') if authenticated else (1, 'REJECT')
+
+        if logger.isEnabledFor(logging.INFO):
+            logger.info('Got response from : %s', response.get('version'))
+            logger.info('Got valid result  : %s', resultdata.get('status'))
+            logger.info('Authenticated     : %s', authenticated)
+            detaildata = response.get('detail')
+            for field in 'message', 'type', 'serial':
+                if field in detaildata:
+                    logger.info('Token %-12s: %s', field, detaildata.get(field))
+
+    finally:
+        if logger.propagate == False and logger.isEnabledFor(LOGGING_RADIUS) \
+                                or logger.getEffectiveLevel() == LOGGING_RADIUS:
+            print 'Auth-Type=%s' % radius_result[1]
+        sys.exit(radius_result[0])

privacyidea.freeradiusmodule

@@ -0,0 +1,105 @@
+#
+# Sample FreeRadius rlm_exec wrapper configuration to perform OTP authentication
+# against privacyidea without rtl_perl module (unavailable on OS X 10.9 Server)
+#
+# Version 1.0, latest version, documentation and bugtracker available at:
+#               https://gitlab.lindenaar.net/scripts/privacyidea-checkotp
+#
+# Copyleft (c) 2015 by Frederik Lindenaar
+#
+
+#
+# Return value of the program run determines the result of the exec instance
+# call (See doc/configurable_failover for details) as follows: 
+#
+#  < 0 : fail      the module failed
+#  = 0 : ok        the module succeeded
+#  = 1 : reject    the module rejected the user
+#  = 2 : fail      the module failed
+#  = 3 : ok        the module succeeded
+#  = 4 : handled   the module has done everything to handle the request
+#  = 5 : invalid   the user's configuration entry was invalid
+#  = 6 : userlock  the user was locked out
+#  = 7 : notfound  the user was not found
+#  = 8 : noop      the module did nothing
+#  = 9 : updated   the module updated information in the request
+#  > 9 : fail      the module failed
+#
+
+exec privacyidea {
+	#
+	#  Wait for the program to finish.
+	#
+	#  If we do NOT wait, then the program is "fire and
+	#  forget", and any output attributes from it are ignored.
+	#
+	#  If we are looking for the program to output
+	#  attributes, and want to add those attributes to the
+	#  request, then we MUST wait for the program to
+	#  finish, and therefore set 'wait=yes'
+	#
+	# allowed values: {no, yes}
+	wait = yes
+
+	#
+	#  The name of the program to execute, and it's
+	#  arguments.  Dynamic translation is done on this
+	#  field, so things like the following example will
+	#  work.
+	#
+	program = "[WRAPPERSCRIPT_PATH]/privacyidea-checkotp [PRIVACYIDEA_URL]"
+
+	#
+	#  The attributes which are placed into the
+	#  environment variables for the program.
+	#
+	#  Allowed values are:
+	#
+	#	request		attributes from the request
+	#	config		attributes from the configuration items list
+	#	reply		attributes from the reply
+	#	proxy-request	attributes from the proxy request
+	#	proxy-reply	attributes from the proxy reply
+	#
+	#  Note that some attributes may not exist at some
+	#  stages.  e.g. There may be no proxy-reply
+	#  attributes if this module is used in the
+	#  'authorize' section.
+	#
+	input_pairs = request
+
+	#
+	#  Where to place the output attributes (if any) from
+	#  the executed program.  The values allowed, and the
+	#  restrictions as to availability, are the same as
+	#  for the input_pairs.
+	#
+	output_pairs = 
+
+	#
+	#  When to execute the program.  If the packet
+	#  type does NOT match what's listed here, then
+	#  the module does NOT execute the program.
+	#
+	#  For a list of allowed packet types, see
+	#  the 'dictionary' file, and look for VALUEs
+	#  of the Packet-Type attribute.
+	#
+	#  By default, the module executes on ANY packet.
+	#  Un-comment out the following line to tell the
+	#  module to execute only if an Access-Accept is
+	#  being sent to the NAS.
+	#
+	packet_type = Access-Request
+
+	#
+	#  Should we escape the environment variables?
+	#  
+	#  If this is set, all the RADIUS attributes
+	#  are capitalised and dashes replaced with
+	#  underscores. Also, RADIUS values are surrounded
+	#  with double-quotes.
+	#
+	#  That is to say: User-Name=BobUser => USER_NAME="BobUser"
+	shell_escape = yes
+}