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#
# Split User-Name in NAI format (RFC 4282) into components
#
# This policy writes the Username and Domain portions of the
# NAI into the Stripped-User-Name and Stripped-User-Domain
# attributes.
#
# The regular expression to do this is not strictly compliant
# with the standard, but it is not possible to write a
# compliant regexp without perl style regular expressions (or
# at least not a legible one).
#
nai_regexp = '^([^@]*)(@([-[:alnum:]]+\.[-[:alnum:].]+))?$'
split_username_nai {
if (&User-Name && (&User-Name =~ /${policy.nai_regexp}/)) {
update request {
&Stripped-User-Name := "%{1}"
}
# Only add the Stripped-User-Domain attribute if
# we have a domain. This means presence checks
# for Stripped-User-Domain work.
if ("%{3}" != '') {
update request {
&Stripped-User-Domain = "%{3}"
}
}
# If any of the expansions result in a null
# string, the update section may return
# something other than updated...
updated
}
else {
noop
}
}
#
# If called in post-proxy we modify the proxy-reply message
#
split_username_nai.post-proxy {
if (&proxy-reply:User-Name && (&proxy-reply:User-Name =~ /${policy.nai_regexp}/)) {
update proxy-reply {
&Stripped-User-Name := "%{1}"
}
# Only add the Stripped-User-Domain attribute if
# we have a domain. This means presence checks
# for Stripped-User-Domain work.
if ("%{3}" != '') {
update proxy-reply {
&Stripped-User-Domain = "%{3}"
}
}
updated
}
else {
noop
}
}
#
# Normalize the MAC Addresses in the Calling/Called-Station-Id
#
mac-addr-regexp = '([0-9a-f]{2})[^0-9a-f]?([0-9a-f]{2})[^0-9a-f]?([0-9a-f]{2})[^0-9a-f]?([0-9a-f]{2})[^0-9a-f]?([0-9a-f]{2})[^0-9a-f]?([0-9a-f]{2})'
#
# Add "rewrite_called_station_id" in the "authorize" and
# "preacct" sections.
#
# Makes Called-Station-ID conform to what RFC3580 says should
# be provided by 802.1X authenticators.
#
rewrite_called_station_id {
if (&Called-Station-Id && (&Called-Station-Id =~ /^${policy.mac-addr-regexp}([^0-9a-f](.+))?$/i)) {
update request {
&Called-Station-Id := "%{toupper:%{1}-%{2}-%{3}-%{4}-%{5}-%{6}}"
}
# SSID component?
if ("%{8}") {
update request {
&Called-Station-SSID := "%{8}"
}
}
updated
}
else {
noop
}
}
#
# Add "rewrite_calling_station_id" in the "authorize" and
# "preacct" sections.
#
# Makes Calling-Station-ID conform to what RFC3580 says should
# be provided by 802.1X authenticators.
#
rewrite_calling_station_id {
if (&Calling-Station-Id && (&Calling-Station-Id =~ /^${policy.mac-addr-regexp}$/i)) {
update request {
&Calling-Station-Id := "%{toupper:%{1}-%{2}-%{3}-%{4}-%{5}-%{6}}"
}
updated
}
else {
noop
}
}
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