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Diffstat (limited to '')
| -rw-r--r-- | raddb/sites-available/check-eap-tls | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/raddb/sites-available/check-eap-tls b/raddb/sites-available/check-eap-tls new file mode 100644 index 0000000..69065e1 --- /dev/null +++ b/raddb/sites-available/check-eap-tls @@ -0,0 +1,135 @@ +# This virtual server allows EAP-TLS to reject access requests +# based on some attributes of the certificates involved. +# +# To use this virtual server, you must enable it in the tls +# section of mods-enabled/eap as well as adding a link to this +# file in sites-enabled/. +# +# +# Value-pairs that are available for checking include: +# +# TLS-Client-Cert-Subject +# TLS-Client-Cert-Issuer +# TLS-Client-Cert-Common-Name +# TLS-Client-Cert-Subject-Alt-Name-Email +# +# To see a full list of attributes, run the server in debug mode +# with this virtual server configured, and look at the attributes +# passed in to this virtual server. +# +# +# This virtual server is also useful when using EAP-TLS as it is +# only called once, just before the final Accept is about to be +# returned from eap, whereas the outer authorize section is called +# multiple times for each challenge / response. For this reason, +# here may be a good location to put authentication logging, and +# modules that check for further authorization, especially if they +# hit external services such as sql or ldap. + + +server check-eap-tls { + + +# Authorize - this is the only section required. +# +# To accept the access request, set Auth-Type = Accept, otherwise +# set it to Reject. + +authorize { + + # + # By default, we just accept the request: + # + update config { + &Auth-Type := Accept + } + + + # + # Check the client certificate matches a string, and reject otherwise + # + +# if ("%{TLS-Client-Cert-Common-Name}" == 'client.example.com') { +# update config { +# &Auth-Type := Accept +# } +# } +# else { +# update config { +# &Auth-Type := Reject +# } +# update reply { +# &Reply-Message := "Your certificate is not valid." +# } +# } + + + # + # Check the client certificate common name against the supplied User-Name + # +# if (&User-Name == "host/%{TLS-Client-Cert-Common-Name}") { +# update config { +# &Auth-Type := Accept +# } +# } +# else { +# update config { +# &Auth-Type := Reject +# } +# } + + + # + # This is a convenient place to call LDAP, for example, when using + # EAP-TLS, as it will only be called once, after all certificates as + # part of the EAP-TLS challenge process have been verified. + # + # An example could be to use LDAP to check that the connecting host, as + # well as presenting a valid certificate, is also in a group based on + # the User-Name (assuming this contains the service principal name). + # Settings such as the following could be used in the ldap module + # configuration: + # + # basedn = "dc=example, dc=com" + # filter = "(servicePrincipalName=%{User-Name})" + # base_filter = "(objectClass=computer)" + # groupname_attribute = cn + # groupmembership_filter = "(&(objectClass=group)(member=%{control:Ldap-UserDn}))" + +# ldap + + # Now let's test membership of an LDAP group (the ldap bind user will + # need permission to read this group membership): + +# if (!(Ldap-Group == "Permitted-Laptops")) { +# update config { +# &Auth-Type := Reject +# } +# } + + # or, to be more specific, you could use the group's full DN: + # if (!(Ldap-Group == "CN=Permitted-Laptops,OU=Groups,DC=example,DC=org")) { + + + # + # This may be a better place to call the files modules when using + # EAP-TLS, as it will only be called once, after the challenge-response + # iteration has completed. + # + +# files + + + # + # Log all request attributes, plus TLS certificate details, to the + # auth_log file. Again, this is just once per connection request, so + # may be preferable than in the outer authorize section. It is + # suggested that 'auth_log' also be in the outer post-auth and + # Post-Auth REJECT sections to log reply packet details, too. + # + + auth_log + +} +} + |