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|
#!/bin/sh
#
# ifup-ipsec
#
# Brings up ipsec interfaces
#
# Configuration parameters
#
# SRC = source address. Not required.
# DST = destination address
# TYPE = IPSEC
# SRCNET = source net (for tunneling)
# DSTNET = destination network (for tunneling)
#
# Manual keying:
#
# AH_PROTO{_IN,_OUT} = protocol to use for AH (defaults to HMAC-SHA1)
# ESP_PROTO{_IN,_OUT} = protocol to use for ESP (defaults to 3DES)
# KEY_AH{_IN,_OUT} = AH key
# KEY_ESP{_IN,_OUT} = ESP key
# SPI_{ESP,AH_{IN,OUT}} = SPIs to use
#
# _IN and _OUT specifiers are for using different keys or protocols for inccoming
# and outgoing packets. If neither _IN or _OUT variants are set for protocols or
# keys, the same will be used for both. Hexadecimal keys need to be prefixed with
# "0x".
#
# Automatic keying:
#
# IKE_METHOD=PSK|X509|GSSAPI
# PSK = preshared keys (shared secret)
# X509 = X.509 certificates
# GSSAPI = GSSAPI authentication
# IKE_PSK = preshared key for this connection
# IKE_CERTFILE = our certificate file name for X509 IKE
# IKE_PEER_CERTFILE = peer public cert filename for X509 IKE
# IKE_DNSSEC = retrieve peer public certs from DNS
# (otherwise uses certificate information sent over IKE)
handle_keys() {
if [ -z "$KEY_AH_IN" -a -n "$KEY_AH" ]; then
KEY_AH_IN=$KEY_AH
fi
if [ -z "$KEY_AH_OUT" -a -n "$KEY_AH" ]; then
KEY_AH_OUT=$KEY_AH
fi
if [ -z "$KEY_ESP_IN" -a -n "$KEY_ESP" ]; then
KEY_ESP_IN=$KEY_ESP
fi
if [ -z "$KEY_ESP_OUT" -a -n "$KEY_ESP" ]; then
KEY_ESP_OUT=$KEY_ESP
fi
[ -n "$KEY_AH_IN" -a "$KEY_AH_IN" = "${KEY_AH_IN##0x}" ] \
&& KEY_AH_IN=\"$KEY_AH_IN\"
[ -n "$KEY_AH_OUT" -a "$KEY_AH_OUT" = "${KEY_AH_OUT##0x}" ] \
&& KEY_AH_OUT=\"$KEY_AH_OUT\"
[ -n "$KEY_ESP_IN" -a "$KEY_ESP_IN" = "${KEY_ESP_IN##0x}" ] \
&& KEY_ESP_IN=\"$KEY_ESP_IN\"
[ -n "$KEY_ESP_OUT" -a "$KEY_ESP_OUT" = "${KEY_ESP_OUT##0x}" ] \
&& KEY_ESP_OUT=\"$KEY_ESP_OUT\"
}
. /etc/init.d/functions
cd /etc/sysconfig/network-scripts
. network-functions
CONFIG=$1
[ -f "${CONFIG}" ] || CONFIG=ifcfg-${1}
source_config
handle_keys
if [ -n "$KEY_AH" -o -n "$KEY_ESP" ]; then
KEYING=manual
fi
if [ -n "$IKE_PSK" ]; then
KEYING=automatic
IKE_METHOD=PSK
fi
if [ -n "$IKE_CERTFILE" ]; then
KEYING=automatic
IKE_METHOD=X509
fi
if [ -n "$IKE_PEER_CERTFILE" ]; then
KEYING=automatic
IKE_METHOD=X509
fi
if [ -n "$IKE_DNSSEC" ]; then
KEYING=automatic
IKE_METHOD=X509
fi
[ -n "$IKE_METHOD" ] && KEYING=automatic
[ -z "$KEYING" ] && KEYING=manual
if [ -z "$SRC" ]; then
SRC=`ip -o route get to $DST | sed "s|.*src \([^ ]*\).*|\1|"`
fi
if [ -n "$SRCNET" -o -n "$DSTNET" ]; then
TUNNEL_MODE=yes
MODE=tunnel
[ -z "$SRCNET" ] && SRCNET="$SRC/32"
[ -z "$DSTNET" ] && DSTNET="$DST/32"
SPD_SRC=$SRCNET
SPD_DST=$DSTNET
# If SRCNET is a subnet of DSTNET, exclude SRCNET<->SRCNET communication
if [ "${SRCNET##*/}" -gt "${DSTNET##*/}" ] \
&& [ "$(ipcalc -n "${SRCNET%%/*}/${DSTNET##*/}")" \
= "NETWORK=${DSTNET%%/*}" ]; then
EXCLUDE_SRCNET=yes
fi
[ -z "$SRCGW" ] && SRCGW=`ip -o route get to $SRCNET | sed "s|.*src \([^ ]*\).*|\1|"`
ip route add to $DSTNET via $SRCGW src $SRCGW
else
unset TUNNEL_MODE
MODE=transport
SPD_SRC=$SRC
SPD_DST=$DST
unset EXCLUDE_SRCNET
fi
unset SPD_AH_IN SPD_AH_OUT SPD_ESP_IN SPD_ESP_OUT
if [ "$KEYING" = "manual" ]; then
[ -z "$AH_PROTO" ] && AH_PROTO=hmac-sha1
[ -z "$ESP_PROTO" ] && ESP_PROTO=3des-cbc
[ -n "$KEY_AH_IN" ] && SPD_AH_IN=yes
[ -n "$KEY_AH_OUT" ] && SPD_AH_OUT=yes
[ -n "$KEY_ESP_IN" ] && SPD_ESP_IN=yes
[ -n "$KEY_ESP_OUT" ] && SPD_ESP_OUT=yes
else
[ -z "$AH_PROTO" ] && AH_PROTO=sha1
[ -z "$ESP_PROTO" ] && ESP_PROTO=3des
SPD_AH_IN=yes
SPD_AH_OUT=yes
SPD_ESP_IN=yes
SPD_ESP_OUT=yes
fi
/sbin/setkey -c >/dev/null 2>&1 << EOF
${SPI_AH_OUT:+delete $SRC $DST ah $SPI_AH_OUT;}
${SPI_AH_IN:+delete $DST $SRC ah $SPI_AH_IN;}
${SPI_ESP_OUT:+delete $SRC $DST esp $SPI_ESP_OUT;}
${SPI_ESP_IN:+delete $DST $SRC esp $SPI_ESP_IN;}
spddelete $SPD_SRC $SPD_DST any -P out;
spddelete $SPD_DST $SPD_SRC any -P in;
${EXCLUDE_SRCNET:+spddelete $SPD_SRC $SPD_SRC any -P out;}
${EXCLUDE_SRCNET:+spddelete $SPD_SRC $SPD_SRC any -P in;}
# ESP
${KEY_ESP_IN:+add $DST $SRC esp $SPI_ESP_IN ${TUNNEL_MODE:+-m tunnel} -E ${ESP_PROTO_IN:-$ESP_PROTO} $KEY_ESP_IN;}
${KEY_ESP_OUT:+add $SRC $DST esp $SPI_ESP_OUT ${TUNNEL_MODE:+-m tunnel} -E ${ESP_PROTO_OUT:-$ESP_PROTO} $KEY_ESP_OUT;}
# AH
${KEY_AH_IN:+add $DST $SRC ah $SPI_AH_IN ${TUNNEL_MODE:+-m tunnel} -A ${AH_PROTO_IN:-$AH_PROTO} $KEY_AH_IN;}
${KEY_AH_OUT:+add $SRC $DST ah $SPI_AH_OUT ${TUNNEL_MODE:+-m tunnel} -A ${AH_PROTO_OUT:-$AH_PROTO} $KEY_AH_OUT;}
${EXCLUDE_SRCNET:+spdadd $SPD_SRC $SPD_SRC any -P out none;}
${EXCLUDE_SRCNET:+spdadd $SPD_SRC $SPD_SRC any -P in none;}
spdadd $SPD_SRC $SPD_DST any -P out ipsec
${SPD_ESP_OUT:+esp/$MODE/${TUNNEL_MODE:+$SRC-$DST}/require}
${SPD_AH_OUT:+ah/$MODE/${TUNNEL_MODE:+$SRC-$DST}/require}
;
spdadd $SPD_DST $SPD_SRC any -P in ipsec
${SPD_ESP_IN:+esp/$MODE/${TUNNEL_MODE:+$DST-$SRC}/require}
${SPD_AH_IN:+ah/$MODE/${TUNNEL_MODE:+$DST-$SRC}/require}
;
EOF
if [ "$KEYING" = "automatic" ]; then
if [ "$IKE_METHOD" = "PSK" ]; then
tmpfile=`mktemp /etc/racoon/psk.XXXXXX`
grep -v "^$DST" /etc/racoon/psk.txt > $tmpfile
echo "$DST $IKE_PSK" >> $tmpfile
mv -f $tmpfile /etc/racoon/psk.txt
fi
if [ ! -f /etc/racoon/$DST.conf -o /etc/racoon/$DST.conf -ot $1 ] ; then
cat > /etc/racoon/$DST.conf << EOF
remote $DST
{
exchange_mode aggressive, main;
EOF
case "$IKE_METHOD" in
PSK)
cat >> /etc/racoon/$DST.conf << EOF
my_identifier address;
proposal {
encryption_algorithm $ESP_PROTO;
hash_algorithm $AH_PROTO;
authentication_method pre_shared_key;
dh_group 2 ;
}
}
EOF
;;
X509)
cat >> /etc/racoon/$DST.conf << EOF
my_identifier asn1dn;
peers_identifier asn1dn;
certificate_type x509 "$IKE_CERTFILE.public" "$IKE_CERTFILE.private";
EOF
if [ -n "$IKE_DNSSEC" ]; then
echo " peers_certfile dnssec;" >> /etc/racoon/$DST.conf
fi
if [ -n "$IKE_PEER_CERTFILE" ]; then
echo " peers_certfile \"$IKE_PEER_CERTFILE.public\";" >> /etc/racoon/$DST.conf
fi
cat >> /etc/racoon/$DST.conf << EOF
proposal {
encryption_algorithm $ESP_PROTO;
hash_algorithm $AH_PROTO;
authentication_method rsasig;
dh_group 2;
}
}
EOF
;;
GSSAPI)
cat >> /etc/racoon/$DST.conf << EOF
my_identifier address;
proposal {
encryption_algorithm $ESP_PROTO;
hash_algorithm $AH_PROTO;
authentication_method gssapi_krb;
dh_group 2 ;
}
}
EOF
esac
fi
racoontmp=`mktemp /etc/racoon/racoon.XXXXXX`
grep -v "^include \"/etc/racoon/$DST.conf\";" /etc/racoon/racoon.conf >> $racoontmp
echo "include \"/etc/racoon/$DST.conf\";" >> $racoontmp
mv -f $racoontmp /etc/racoon/racoon.conf
if pidof -x /usr/sbin/racoon > /dev/null 2>&1 ; then
killall -HUP /usr/sbin/racoon
else
/usr/sbin/racoon
fi
fi
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