1# $OpenBSD: dhgex.sh,v 1.4 2017/05/08 01:52:49 djm Exp $ 2# Placed in the Public Domain. 3 4tid="dhgex" 5 6LOG=${TEST_SSH_LOGFILE} 7rm -f ${LOG} 8cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak 9 10kexs=`${SSH} -Q kex | grep diffie-hellman-group-exchange` 11 12ssh_test_dhgex() 13{ 14 bits="$1"; shift 15 cipher="$1"; shift 16 kex="$1"; shift 17 18 cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy 19 echo "KexAlgorithms=$kex" >> $OBJ/sshd_proxy 20 echo "Ciphers=$cipher" >> $OBJ/sshd_proxy 21 rm -f ${LOG} 22 opts="-oKexAlgorithms=$kex -oCiphers=$cipher" 23 min=2048 24 max=8192 25 groupsz="$min<$bits<$max" 26 verbose "$tid bits $bits $kex $cipher" 27 ${SSH} ${opts} $@ -vvv -F ${OBJ}/ssh_proxy somehost true 28 if [ $? -ne 0 ]; then 29 fail "ssh failed ($@)" 30 fi 31 # check what we request 32 grep "SSH2_MSG_KEX_DH_GEX_REQUEST($groupsz) sent" ${LOG} >/dev/null 33 if [ $? != 0 ]; then 34 got=`egrep "SSH2_MSG_KEX_DH_GEX_REQUEST(.*) sent" ${LOG}` 35 fail "$tid unexpected GEX sizes, expected $groupsz, got $got" 36 fi 37 # check what we got (depends on contents of system moduli file) 38 gotbits="`awk '/bits set:/{print $4}' ${LOG} | head -1 | cut -f2 -d/`" 39 if [ "$gotbits" -lt "$bits" ]; then 40 fatal "$tid expected $bits bit group, got $gotbits" 41 fi 42} 43 44check() 45{ 46 bits="$1"; shift 47 48 for c in $@; do 49 for k in $kexs; do 50 ssh_test_dhgex $bits $c $k 51 done 52 done 53} 54 55#check 2048 3des-cbc 56check 3072 `${SSH} -Q cipher | grep 128` 57check 7680 `${SSH} -Q cipher | grep 192` 58check 8192 `${SSH} -Q cipher | grep 256` 59check 8192 rijndael-cbc@lysator.liu.se chacha20-poly1305@openssh.com 60