add the ability to persist SSL session cache to disk across server restarts

[freeradius.git] / raddb / mods-available / eap

# -*- text -*-
##
##  eap.conf -- Configuration for EAP types (PEAP, TTLS, etc.)
##
##      $Id$

#######################################################################
#
#  Whatever you do, do NOT set 'Auth-Type := EAP'.  The server
#  is smart enough to figure this out on its own.  The most
#  common side effect of setting 'Auth-Type := EAP' is that the
#  users then cannot use ANY other authentication method.
#
#  EAP types NOT listed here may be supported via the "eap2" module.
#  See experimental.conf for documentation.
#
eap {
        #  Invoke the default supported EAP type when
        #  EAP-Identity response is received.
        #
        #  The incoming EAP messages DO NOT specify which EAP
        #  type they will be using, so it MUST be set here.
        #
        #  For now, only one default EAP type may be used at a time.
        #
        #  If the EAP-Type attribute is set by another module,
        #  then that EAP type takes precedence over the
        #  default type configured here.
        #
        default_eap_type = md5

        #  A list is maintained to correlate EAP-Response
        #  packets with EAP-Request packets.  After a
        #  configurable length of time, entries in the list
        #  expire, and are deleted.
        #
        timer_expire     = 60

        #  There are many EAP types, but the server has support
        #  for only a limited subset.  If the server receives
        #  a request for an EAP type it does not support, then
        #  it normally rejects the request.  By setting this
        #  configuration to "yes", you can tell the server to
        #  instead keep processing the request.  Another module
        #  MUST then be configured to proxy the request to
        #  another RADIUS server which supports that EAP type.
        #
        #  If another module is NOT configured to handle the
        #  request, then the request will still end up being
        #  rejected.
        ignore_unknown_eap_types = no

        # Cisco AP1230B firmware 12.2(13)JA1 has a bug.  When given
        # a User-Name attribute in an Access-Accept, it copies one
        # more byte than it should.
        #
        # We can work around it by configurably adding an extra
        # zero byte.
        cisco_accounting_username_bug = no

        #
        #  Help prevent DoS attacks by limiting the number of
        #  sessions that the server is tracking.  Most systems
        #  can handle ~30 EAP sessions/s, so the default limit
        #  of 4096 should be OK.
        max_sessions = 4096

        # Supported EAP-types

        #
        #  We do NOT recommend using EAP-MD5 authentication
        #  for wireless connections.  It is insecure, and does
        #  not provide for dynamic WEP keys.
        #
        md5 {
        }

        # 
        # EAP-pwd -- secure password-based authentication
        #
#       pwd {
#               group = 19

                #
#               server_id = theserver@example.com

                #  This has the same meaning as for TLS.
#               fragment_size = 1020

                # The virtual server which determines the 
                # "known good" password for the user.
                # Note that unlike TLS, only the "authorize"
                # section is processed.  EAP-PWD requests can be
                # distinguished by having a User-Name, but
                # no User-Password, CHAP-Password, EAP-Message, etc.
#               virtual_server = "inner-tunnel"
#       }

        # Cisco LEAP
        #
        #  We do not recommend using LEAP in new deployments.  See:
        #  http://www.securiteam.com/tools/5TP012ACKE.html
        #
        #  Cisco LEAP uses the MS-CHAP algorithm (but not
        #  the MS-CHAP attributes) to perform it's authentication.
        #
        #  As a result, LEAP *requires* access to the plain-text
        #  User-Password, or the NT-Password attributes.
        #  'System' authentication is impossible with LEAP.
        #
        leap {
        }

        #  Generic Token Card.
        #
        #  Currently, this is only permitted inside of EAP-TTLS,
        #  or EAP-PEAP.  The module "challenges" the user with
        #  text, and the response from the user is taken to be
        #  the User-Password.
        #
        #  Proxying the tunneled EAP-GTC session is a bad idea,
        #  the users password will go over the wire in plain-text,
        #  for anyone to see.
        #
        gtc {
                #  The default challenge, which many clients
                #  ignore..
                #challenge = "Password: "

                #  The plain-text response which comes back
                #  is put into a User-Password attribute,
                #  and passed to another module for
                #  authentication.  This allows the EAP-GTC
                #  response to be checked against plain-text,
                #  or crypt'd passwords.
                #
                #  If you say "Local" instead of "PAP", then
                #  the module will look for a User-Password
                #  configured for the request, and do the
                #  authentication itself.
                #
                auth_type = PAP
        }

        ## Common TLS configuration for TLS-based EAP types
        #
        #  See raddb/certs/README for additional comments
        #  on certificates.
        #
        #  If OpenSSL was not found at the time the server was
        #  built, the "tls", "ttls", and "peap" sections will
        #  be ignored.
        #
        #  Otherwise, when the server first starts in debugging
        #  mode, test certificates will be created.  See the
        #  "make_cert_command" below for details, and the README
        #  file in raddb/certs
        #
        #  These test certificates SHOULD NOT be used in a normal
        #  deployment.  They are created only to make it easier
        #  to install the server, and to perform some simple
        #  tests with EAP-TLS, TTLS, or PEAP.
        #
        #  See also:
        #
        #  http://www.dslreports.com/forum/remark,9286052~mode=flat
        #
        #  Note that you should NOT use a globally known CA here!
        #  e.g. using a Verisign cert as a "known CA" means that
        #  ANYONE who has a certificate signed by them can
        #  authenticate via EAP-TLS!  This is likely not what you want.
        tls-config tls-common {
                private_key_password = whatever
                private_key_file = ${certdir}/server.pem

                #  If Private key & Certificate are located in
                #  the same file, then private_key_file &
                #  certificate_file must contain the same file
                #  name.
                #
                #  If CA_file (below) is not used, then the
                #  certificate_file below MUST include not
                #  only the server certificate, but ALSO all
                #  of the CA certificates used to sign the
                #  server certificate.
                certificate_file = ${certdir}/server.pem

                #  Trusted Root CA list
                #
                #  ALL of the CA's in this list will be trusted
                #  to issue client certificates for authentication.
                #
                #  In general, you should use self-signed
                #  certificates for 802.1x (EAP) authentication.
                #  In that case, this CA file should contain
                #  *one* CA certificate.
                #
                #  This parameter is used only for EAP-TLS,
                #  when you issue client certificates.  If you do
                #  not use client certificates, and you do not want
                #  to permit EAP-TLS authentication, then delete
                #  this configuration item.
                CA_file = ${cadir}/ca.pem

                #
                #  If OpenSSL supports TLS-PSK, then we can use
                #  a PSK identity and (hex) password.  When the
                #  following two configuration items are specified,
                #  then certificate-based configuration items are
                #  not allowed.  e.g.:
                #
                #       private_key_password
                #       private_key_file
                #       certificate_file
                #       CA_file
                #       CA_path
                #
                #  For now, the identity is fixed, and must be the
                #  same on the client.  The passphrase must be a hex
                #  value, and can be up to 256 hex digits.
                #
                #  Future versions of the server may be able to
                #  look up the shared key (hexphrase) based on the
                #  identity.
                #
        #       psk_identity = "test"
        #       psk_hexphrase = "036363823"

                #
                #  For DH cipher suites to work, you have to
                #  run OpenSSL to create the DH file first:
                #
                #       openssl dhparam -out certs/dh 1024
                #
                dh_file = ${certdir}/dh
                random_file = ${certdir}/random

                #
                #  This can never exceed the size of a RADIUS
                #  packet (4096 bytes), and is preferably half
                #  that, to accomodate other attributes in
                #  RADIUS packet.  On most APs the MAX packet
                #  length is configured between 1500 - 1600
                #  In these cases, fragment size should be
                #  1024 or less.
                #
        #       fragment_size = 1024

                #  include_length is a flag which is
                #  by default set to yes If set to
                #  yes, Total Length of the message is
                #  included in EVERY packet we send.
                #  If set to no, Total Length of the
                #  message is included ONLY in the
                #  First packet of a fragment series.
                #
        #       include_length = yes

                #  Check the Certificate Revocation List
                #
                #  1) Copy CA certificates and CRLs to same directory.
                #  2) Execute 'c_rehash <CA certs&CRLs Directory>'.
                #    'c_rehash' is OpenSSL's command.
                #  3) uncomment the line below.
                #  5) Restart radiusd
        #       check_crl = yes
                CA_path = ${cadir}

               #
               #  If check_cert_issuer is set, the value will
               #  be checked against the DN of the issuer in
               #  the client certificate.  If the values do not
               #  match, the cerficate verification will fail,
               #  rejecting the user.
               #
               #  In 2.1.10 and later, this check can be done
               #  more generally by checking the value of the
               #  TLS-Client-Cert-Issuer attribute.  This check
               #  can be done via any mechanism you choose.
               #
        #       check_cert_issuer = "/C=GB/ST=Berkshire/L=Newbury/O=My Company Ltd"

               #
               #  If check_cert_cn is set, the value will
               #  be xlat'ed and checked against the CN
               #  in the client certificate.  If the values
               #  do not match, the certificate verification
               #  will fail rejecting the user.
               #
               #  This check is done only if the previous
               #  "check_cert_issuer" is not set, or if
               #  the check succeeds.
               #
               #  In 2.1.10 and later, this check can be done
               #  more generally by checking the value of the
               #  TLS-Client-Cert-CN attribute.  This check
               #  can be done via any mechanism you choose.
               #
        #       check_cert_cn = %{User-Name}
        #
                # Set this option to specify the allowed
                # TLS cipher suites.  The format is listed
                # in "man 1 ciphers".
                cipher_list = "DEFAULT"

                #

                # This command creates the initial "snake oil"
                # certificates when the server is run as root,
                # and via "radiusd -X".
                #
                # As of 2.1.11, it *also* checks the server
                # certificate for validity, including expiration.
                # This means that radiusd will refuse to start
                # when the certificate has expired.  The alternative
                # is to have the 802.1X clients refuse to connect
                # when they discover the certificate has expired.
                #
                # Debugging client issues is hard, so it's better
                # for the server to print out an error message,
                # and refuse to start.
                #
                make_cert_command = "${certdir}/bootstrap"

                #
                #  Elliptical cryptography configuration
                #
                #  Only for OpenSSL >= 0.9.8.f
                #
                ecdh_curve = "prime256v1"

                #
                #  Session resumption / fast reauthentication
                #  cache.
                #
                #  The cache contains the following information:
                #
                #  session Id - unique identifier, managed by SSL
                #  User-Name  - from the Access-Accept
                #  Stripped-User-Name - from the Access-Request
                #  Cached-Session-Policy - from the Access-Accept
                #
                #  The "Cached-Session-Policy" is the name of a
                #  policy which should be applied to the cached
                #  session.  This policy can be used to assign
                #  VLANs, IP addresses, etc.  It serves as a useful
                #  way to re-apply the policy from the original
                #  Access-Accept to the subsequent Access-Accept
                #  for the cached session.
                #
                #  On session resumption, these attributes are
                #  copied from the cache, and placed into the
                #  reply list.
                #
                #  You probably also want "use_tunneled_reply = yes"
                #  when using fast session resumption.
                #
                cache {
                      #
                      #  Enable it.  The default is "no".
                      #  Deleting the entire "cache" subsection
                      #  Also disables caching.
                      #
                      #  You can disallow resumption for a
                      #  particular user by adding the following
                      #  attribute to the control item list:
                      #
                      #         Allow-Session-Resumption = No
                      #
                      #  If "enable = no" below, you CANNOT
                      #  enable resumption for just one user
                      #  by setting the above attribute to "yes".
                      #
                      enable = yes

                      #
                      #  Lifetime of the cached entries, in hours.
                      #  The sessions will be deleted after this
                      #  time.
                      #
                      lifetime = 24 # hours

                      #
                      #  The maximum number of entries in the
                      #  cache.  Set to "0" for "infinite".
                      #
                      #  This could be set to the number of users
                      #  who are logged in... which can be a LOT.
                      #
                      max_entries = 255

                      #
                      #  Internal "name" of the session cache.
                      #  Used to distinguish which TLS context
                      #  sessions belong to.
                      #
                      #  The server will generate a random value
                      #  if unset. This will change across server
                      #  restart so you MUST set the "name" if you
                      #  want to persist sessions (see below).
                      #
                      #name = "EAP module"

                      #
                      #  Simple directory-based storage of sessions.
                      #  Two files per session will be written, the SSL
                      #  state and the cached VPs. This will persist session
                      #  across server restarts.
                      #
                      #  The server will need write perms, and the directory
                      #  should be secured from anyone else. You might want
                      #  a script to remove old files from here periodically:
                      #
                      #    find ${logdir}/tlscache -mtime +2 -exec rm -f {} \;
                      #
                      #  This feature REQUIRES "name" option be set above.
                      #
                      #persist_dir = "${logdir}/tlscache"
                }

                #
                #  As of version 2.1.10, client certificates can be
                #  validated via an external command.  This allows
                #  dynamic CRLs or OCSP to be used.
                #
                #  This configuration is commented out in the
                #  default configuration.  Uncomment it, and configure
                #  the correct paths below to enable it.
                #
                verify {
                        #  A temporary directory where the client
                        #  certificates are stored.  This directory
                        #  MUST be owned by the UID of the server,
                        #  and MUST not be accessible by any other
                        #  users.  When the server starts, it will do
                        #  "chmod go-rwx" on the directory, for
                        #  security reasons.  The directory MUST
                        #  exist when the server starts.
                        #
                        #  You should also delete all of the files
                        #  in the directory when the server starts.
        #               tmpdir = /tmp/radiusd

                        #  The command used to verify the client cert.
                        #  We recommend using the OpenSSL command-line
                        #  tool.
                        #
                        #  The ${..CA_path} text is a reference to
                        #  the CA_path variable defined above.
                        #
                        #  The %{TLS-Client-Cert-Filename} is the name
                        #  of the temporary file containing the cert
                        #  in PEM format.  This file is automatically
                        #  deleted by the server when the command
                        #  returns.
        #               client = "/path/to/openssl verify -CApath ${..CA_path} %{TLS-Client-Cert-Filename}"
                }

                #
                #  OCSP Configuration
                #  Certificates can be verified against an OCSP
                #  Responder. This makes it possible to immediately
                #  revoke certificates without the distribution of
                #  new Certificate Revokation Lists (CRLs).
                #
                ocsp {
                      #
                      #  Enable it.  The default is "no".
                      #  Deleting the entire "ocsp" subsection
                      #  Also disables ocsp checking
                      #
                      enable = no

                      #
                      #  The OCSP Responder URL can be automatically
                      #  extracted from the certificate in question.
                      #  To override the OCSP Responder URL set
                      #  "override_cert_url = yes". 
                      #
                      override_cert_url = yes

                      #
                      #  If the OCSP Responder address is not
                      #  extracted from the certificate, the
                      #  URL can be defined here.

                      #
                      #  Limitation: Currently the HTTP
                      #  Request is not sending the "Host: "
                      #  information to the web-server.  This
                      #  can be a problem if the OCSP
                      #  Responder is running as a vhost.
                      #
                      url = "http://127.0.0.1/ocsp/"

                      #
                      # If the OCSP Responder can not cope with nonce
                      # in the request, then it can be disabled here.
                      #
                      # For security reasons, disabling this option
                      # is not recommended as nonce protects against
                      # replay attacks.
                      #
                      # Note that Microsoft AD Certificate Services OCSP
                      # Responder does not enable nonce by default. It is
                      # more secure to enable nonce on the responder than
                      # to disable it in the query here.
                      # See http://technet.microsoft.com/en-us/library/cc770413%28WS.10%29.aspx
                      #
                      # use_nonce = yes

                      #
                      # Number of seconds before giving up waiting
                      # for OCSP response. 0 uses system default.
                      #
                      # timeout = 0

                      #
                      # Normally an error in querying the OCSP
                      # responder (no response from server, server did
                      # not understand the request, etc) will result in
                      # a validation failure.
                      #
                      # To treat these errors as 'soft' failures and
                      # still accept the certificate, enable this
                      # option.
                      # 
                      # Warning: this may enable clients with revoked
                      # certificates to connect if the OCSP responder
                      # is not available. Use with caution.
                      #
                      # softfail = no
                }
        }

        ## EAP-TLS
        #
        #  As of Version 3.0, the TLS configuration for TLS-based
        #  EAP types is above in the "tls-config" section.
        #
        tls {
                # Point to the common TLS configuration
                tls = tls-common

                #
                # As part of checking a client certificate, the EAP-TLS
                # sets some attributes such as TLS-Client-Cert-CN. This
                # virtual server has access to these attributes, and can
                # be used to accept or reject the request.
                #
        #       virtual_server = check-eap-tls
        }


        ## EAP-TTLS
        #
        #  The TTLS module implements the EAP-TTLS protocol,
        #  which can be described as EAP inside of Diameter,
        #  inside of TLS, inside of EAP, inside of RADIUS...
        #
        #  Surprisingly, it works quite well.
        #
        #  EAP-TTLS does not normally require a client certificate,
        #  but you can make it require one by setting
        #
        #       EAP-TLS-Require-Client-Cert = Yes
        #
        #  in the control items for a request.
        #
        ttls {
                #  Which tls-config section the TLS negotiation parameters
                #  are in - see EAP-TLS above for an explanation.
                #
                #  In the case that an old configuration from FreeRADIUS
                #  v2.x is being used, all the options of the tls-config
                #  section may also appear instead in the 'tls' section
                #  above. If that is done, the tls= option here (and in
                #  tls above) MUST be commented out.
                # 
                tls = tls-common

                #  The tunneled EAP session needs a default EAP type
                #  which is separate from the one for the non-tunneled
                #  EAP module.  Inside of the TTLS tunnel, we recommend
                #  using EAP-MD5.  If the request does not contain an
                #  EAP conversation, then this configuration entry is
                #  ignored.
                #
                default_eap_type = md5

                #  The tunneled authentication request does not usually
                #  contain useful attributes like 'Calling-Station-Id',
                #  etc.  These attributes are outside of the tunnel,
                #  and normally unavailable to the tunneled
                #  authentication request.
                #
                #  By setting this configuration entry to 'yes',
                #  any attribute which is NOT in the tunneled
                #  authentication request, but which IS available
                #  outside of the tunnel, is copied to the tunneled
                #  request.
                #
                #  allowed values: {no, yes}
                #
                copy_request_to_tunnel = no

                #  The reply attributes sent to the NAS are usually
                #  based on the name of the user 'outside' of the
                #  tunnel (usually 'anonymous').  If you want to send
                #  the reply attributes based on the user name inside
                #  of the tunnel, then set this configuration entry to
                #  'yes', and the reply to the NAS will be taken from
                #  the reply to the tunneled request.
                #
                #  allowed values: {no, yes}
                #
                use_tunneled_reply = no

                #
                #  The inner tunneled request can be sent
                #  through a virtual server constructed
                #  specifically for this purpose.
                #
                #  If this entry is commented out, the inner
                #  tunneled request will be sent through
                #  the virtual server that processed the
                #  outer requests.
                #
                virtual_server = "inner-tunnel"

                #  This has the same meaning, and overwrites, the
                #  same field in the "tls" configuration, above.
                #  The default value here is "yes".
                #
        #       include_length = yes
        }


        ## EAP-PEAP
        #

        ##################################################
        #
        #  !!!!! WARNINGS for Windows compatibility  !!!!!
        #
        ##################################################
        #
        #  If you see the server send an Access-Challenge,
        #  and the client never sends another Access-Request,
        #  then
        #
        #               STOP!
        #
        #  The server certificate has to have special OID's
        #  in it, or else the Microsoft clients will silently
        #  fail.  See the "scripts/xpextensions" file for
        #  details, and the following page:
        #
        #       http://support.microsoft.com/kb/814394/en-us
        #
        #  For additional Windows XP SP2 issues, see:
        #
        #       http://support.microsoft.com/kb/885453/en-us
        #
        #
        #  If is still doesn't work, and you're using Samba,
        #  you may be encountering a Samba bug.  See:
        #
        #       https://bugzilla.samba.org/show_bug.cgi?id=6563
        #
        #  Note that we do not necessarily agree with their
        #  explanation... but the fix does appear to work.
        #
        ##################################################

        #
        #  The tunneled EAP session needs a default EAP type
        #  which is separate from the one for the non-tunneled
        #  EAP module.  Inside of the TLS/PEAP tunnel, we
        #  recommend using EAP-MS-CHAPv2.
        #
        #  Unlike EAP-TLS, PEAP does not require a client certificate.
        #  However, you can require one by setting
        #
        #       EAP-TLS-Require-Client-Cert = Yes
        #
        #  in the control items for a request.
        #
        peap {
                #  Which tls-config section the TLS negotiation parameters
                #  are in - see EAP-TLS above for an explanation.
                #
                #  In the case that an old configuration from FreeRADIUS
                #  v2.x is being used, all the options of the tls-config
                #  section may also appear instead in the 'tls' section
                #  above. If that is done, the tls= option here (and in
                #  tls above) MUST be commented out.
                # 
                tls = tls-common

                #  The tunneled EAP session needs a default
                #  EAP type which is separate from the one for
                #  the non-tunneled EAP module.  Inside of the
                #  PEAP tunnel, we recommend using MS-CHAPv2,
                #  as that is the default type supported by
                #  Windows clients.
                #
                default_eap_type = mschapv2

                #  The PEAP module also has these configuration
                #  items, which are the same as for TTLS.
                #
                copy_request_to_tunnel = no
                use_tunneled_reply = no

                #  When the tunneled session is proxied, the
                #  home server may not understand EAP-MSCHAP-V2.
                #  Set this entry to "no" to proxy the tunneled
                #  EAP-MSCHAP-V2 as normal MSCHAPv2.
                #
        #       proxy_tunneled_request_as_eap = yes

                #
                #  The inner tunneled request can be sent
                #  through a virtual server constructed
                #  specifically for this purpose.
                #
                #  If this entry is commented out, the inner
                #  tunneled request will be sent through
                #  the virtual server that processed the
                #  outer requests.
                #
                virtual_server = "inner-tunnel"

                # This option enables support for MS-SoH
                # see doc/SoH.txt for more info.
                # It is disabled by default.
                #
        #       soh = yes

                #
                # The SoH reply will be turned into a request which
                # can be sent to a specific virtual server:
                #
        #       soh_virtual_server = "soh-server"
        }

        #
        #  This takes no configuration.
        #
        #  Note that it is the EAP MS-CHAPv2 sub-module, not
        #  the main 'mschap' module.
        #
        #  Note also that in order for this sub-module to work,
        #  the main 'mschap' module MUST ALSO be configured.
        #
        #  This module is the *Microsoft* implementation of MS-CHAPv2
        #  in EAP.  There is another (incompatible) implementation
        #  of MS-CHAPv2 in EAP by Cisco, which FreeRADIUS does not
        #  currently support.
        #
        mschapv2 {
                #  Prior to version 2.1.11, the module never
                #  sent the MS-CHAP-Error message to the
                #  client.  This worked, but it had issues
                #  when the cached password was wrong.  The
                #  server *should* send "E=691 R=0" to the
                #  client, which tells it to prompt the user
                #  for a new password.
                #
                #  The default is to behave as in 2.1.10 and
                #  earlier, which is known to work.  If you
                #  set "send_error = yes", then the error
                #  message will be sent back to the client.
                #  This *may* help some clients work better,
                #  but *may* also cause other clients to stop
                #  working.
                #
#               send_error = no
        }
}