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dtucker@openbsd.org86c10db2015-10-23 02:22:01 +00001# $OpenBSD: dhgex.sh,v 1.3 2015/10/23 02:22:01 dtucker Exp $
Damien Millerb8439232014-02-28 10:21:26 +11002# Placed in the Public Domain.
3
4tid="dhgex"
5
6LOG=${TEST_SSH_LOGFILE}
7rm -f ${LOG}
Damien Milleredb1af52014-05-15 15:07:53 +10008cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
Damien Millerb8439232014-02-28 10:21:26 +11009
10kexs=`${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
Damien Milleredb1af52014-05-15 15:07:53 +100018 cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
19 echo "KexAlgorithms=$kex" >> $OBJ/sshd_proxy
20 echo "Ciphers=$cipher" >> $OBJ/sshd_proxy
Damien Millerb8439232014-02-28 10:21:26 +110021 rm -f ${LOG}
22 opts="-oKexAlgorithms=$kex -oCiphers=$cipher"
dtucker@openbsd.org86c10db2015-10-23 02:22:01 +000023 min=2048
24 max=8192
25 groupsz="$min<$bits<$max"
Damien Millerb8439232014-02-28 10:21:26 +110026 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 3072 arcfour blowfish-cbc
58check 7680 `${SSH} -Q cipher | grep 192`
59check 8192 `${SSH} -Q cipher | grep 256`
60check 8192 rijndael-cbc@lysator.liu.se chacha20-poly1305@openssh.com