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Diffstat (limited to 'crypto/openssh/regress/integrity.sh')
| -rwxr-xr-x | crypto/openssh/regress/integrity.sh | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/crypto/openssh/regress/integrity.sh b/crypto/openssh/regress/integrity.sh new file mode 100755 index 0000000..1d17fe1 --- /dev/null +++ b/crypto/openssh/regress/integrity.sh @@ -0,0 +1,76 @@ +# $OpenBSD: integrity.sh,v 1.10 2013/05/17 01:32:11 dtucker Exp $ +# Placed in the Public Domain. + +tid="integrity" + +# start at byte 2900 (i.e. after kex) and corrupt at different offsets +# XXX the test hangs if we modify the low bytes of the packet length +# XXX and ssh tries to read... +tries=10 +startoffset=2900 +macs="hmac-sha1 hmac-md5 umac-64@openssh.com umac-128@openssh.com + hmac-sha1-96 hmac-md5-96 + hmac-sha1-etm@openssh.com hmac-md5-etm@openssh.com + umac-64-etm@openssh.com umac-128-etm@openssh.com + hmac-sha1-96-etm@openssh.com hmac-md5-96-etm@openssh.com" +config_defined HAVE_EVP_SHA256 && + macs="$macs hmac-sha2-256 hmac-sha2-512 + hmac-sha2-256-etm@openssh.com hmac-sha2-512-etm@openssh.com" +# The following are not MACs, but ciphers with integrated integrity. They are +# handled specially below. +config_defined OPENSSL_HAVE_EVPGCM && \ + macs="$macs aes128-gcm@openssh.com aes256-gcm@openssh.com" + +# avoid DH group exchange as the extra traffic makes it harder to get the +# offset into the stream right. +echo "KexAlgorithms diffie-hellman-group14-sha1,diffie-hellman-group1-sha1" \ + >> $OBJ/ssh_proxy + +# sshd-command for proxy (see test-exec.sh) +cmd="$SUDO sh ${SRC}/sshd-log-wrapper.sh ${SSHD} ${TEST_SSHD_LOGFILE} -i -f $OBJ/sshd_proxy" + +for m in $macs; do + trace "test $tid: mac $m" + elen=0 + epad=0 + emac=0 + ecnt=0 + skip=0 + for off in `jot $tries $startoffset`; do + skip=`expr $skip - 1` + if [ $skip -gt 0 ]; then + # avoid modifying the high bytes of the length + continue + fi + # modify output from sshd at offset $off + pxy="proxycommand=$cmd | $OBJ/modpipe -wm xor:$off:1" + case $m in + aes*gcm*) macopt="-c $m";; + *) macopt="-m $m";; + esac + verbose "test $tid: $m @$off" + ${SSH} $macopt -2F $OBJ/ssh_proxy -o "$pxy" \ + 999.999.999.999 'printf "%4096s" " "' >/dev/null + if [ $? -eq 0 ]; then + fail "ssh -m $m succeeds with bit-flip at $off" + fi + ecnt=`expr $ecnt + 1` + output=$(tail -2 $TEST_SSH_LOGFILE | egrep -v "^debug" | \ + tr -s '\r\n' '.') + case "$output" in + Bad?packet*) elen=`expr $elen + 1`; skip=3;; + Corrupted?MAC* | Decryption?integrity?check?failed*) + emac=`expr $emac + 1`; skip=0;; + padding*) epad=`expr $epad + 1`; skip=0;; + *) fail "unexpected error mac $m at $off";; + esac + done + verbose "test $tid: $ecnt errors: mac $emac padding $epad length $elen" + if [ $emac -eq 0 ]; then + fail "$m: no mac errors" + fi + expect=`expr $ecnt - $epad - $elen` + if [ $emac -ne $expect ]; then + fail "$m: expected $expect mac errors, got $emac" + fi +done |
