1 # $OpenBSD: integrity.sh,v 1.10 2013/05/17 01:32:11 dtucker Exp $
2 # Placed in the Public Domain.
6 # start at byte 2900 (i.e. after kex) and corrupt at different offsets
7 # XXX the test hangs if we modify the low bytes of the packet length
8 # XXX and ssh tries to read...
11 macs="hmac-sha1 hmac-md5 umac-64@openssh.com umac-128@openssh.com
12 hmac-sha1-96 hmac-md5-96
13 hmac-sha1-etm@openssh.com hmac-md5-etm@openssh.com
14 umac-64-etm@openssh.com umac-128-etm@openssh.com
15 hmac-sha1-96-etm@openssh.com hmac-md5-96-etm@openssh.com"
16 config_defined HAVE_EVP_SHA256 &&
17 macs="$macs hmac-sha2-256 hmac-sha2-512
18 hmac-sha2-256-etm@openssh.com hmac-sha2-512-etm@openssh.com"
19 # The following are not MACs, but ciphers with integrated integrity. They are
20 # handled specially below.
21 config_defined OPENSSL_HAVE_EVPGCM && \
22 macs="$macs aes128-gcm@openssh.com aes256-gcm@openssh.com"
24 # avoid DH group exchange as the extra traffic makes it harder to get the
25 # offset into the stream right.
26 echo "KexAlgorithms diffie-hellman-group14-sha1,diffie-hellman-group1-sha1" \
29 # sshd-command for proxy (see test-exec.sh)
30 cmd="$SUDO sh ${SRC}/sshd-log-wrapper.sh ${SSHD} ${TEST_SSHD_LOGFILE} -i -f $OBJ/sshd_proxy"
33 trace "test $tid: mac $m"
39 for off in `jot $tries $startoffset`; do
41 if [ $skip -gt 0 ]; then
42 # avoid modifying the high bytes of the length
45 # modify output from sshd at offset $off
46 pxy="proxycommand=$cmd | $OBJ/modpipe -wm xor:$off:1"
48 aes*gcm*) macopt="-c $m";;
51 verbose "test $tid: $m @$off"
52 ${SSH} $macopt -2F $OBJ/ssh_proxy -o "$pxy" \
53 999.999.999.999 'printf "%4096s" " "' >/dev/null
55 fail "ssh -m $m succeeds with bit-flip at $off"
58 output=$(tail -2 $TEST_SSH_LOGFILE | egrep -v "^debug" | \
61 Bad?packet*) elen=`expr $elen + 1`; skip=3;;
62 Corrupted?MAC* | Decryption?integrity?check?failed*)
63 emac=`expr $emac + 1`; skip=0;;
64 padding*) epad=`expr $epad + 1`; skip=0;;
65 *) fail "unexpected error mac $m at $off";;
68 verbose "test $tid: $ecnt errors: mac $emac padding $epad length $elen"
69 if [ $emac -eq 0 ]; then
70 fail "$m: no mac errors"
72 expect=`expr $ecnt - $epad - $elen`
73 if [ $emac -ne $expect ]; then
74 fail "$m: expected $expect mac errors, got $emac"