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upstream: Use ed25519 for most hostkey rotation tests since it's

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supported even when built without OpenSSL.  Use RSA for the secondary type
test if supported, otherwise skip it.  Fixes this test for !OpenSSL builds.

OpenBSD-Regress-ID: 101cb34a84fd974c623bdb2e496f25a6e91be109
This commit is contained in:
dtucker@openbsd.org 2019-08-30 05:08:28 +00:00 committed by Darren Tucker
parent 5e4796c47d
commit e50f808712
1 changed files with 44 additions and 30 deletions
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74
regress/hostkey-rotate.sh
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@ -1,10 +1,10 @@
# $OpenBSD: hostkey-rotate.sh,v 1.5 2015/09/04 04:23:10 djm Exp $ # $OpenBSD: hostkey-rotate.sh,v 1.6 2019/08/30 05:08:28 dtucker Exp $
# Placed in the Public Domain. # Placed in the Public Domain.
tid="hostkey rotate" tid="hostkey rotate"
# Need full names here since they are used in HostKeyAlgorithms # Need full names here since they are used in HostKeyAlgorithms
HOSTKEY_TYPES="ecdsa-sha2-nistp256 ssh-ed25519 ssh-rsa ssh-dss" HOSTKEY_TYPES="`${SSH} -Q key-plain`"
rm -f $OBJ/hkr.* $OBJ/ssh_proxy.orig rm -f $OBJ/hkr.* $OBJ/ssh_proxy.orig
@ -12,15 +12,23 @@ grep -vi 'hostkey' $OBJ/sshd_proxy > $OBJ/sshd_proxy.orig
echo "UpdateHostkeys=yes" >> $OBJ/ssh_proxy echo "UpdateHostkeys=yes" >> $OBJ/ssh_proxy
rm $OBJ/known_hosts rm $OBJ/known_hosts
# The "primary" key type is ed25519 since it's supported even when built
# without OpenSSL. The secondary is RSA if it's supported.
primary="ssh-ed25519"
secondary="$primary"
trace "prepare hostkeys" trace "prepare hostkeys"
nkeys=0 nkeys=0
all_algs="" all_algs=""
for k in `${SSH} -Q key-plain` ; do for k in $HOSTKEY_TYPES; do
${SSHKEYGEN} -qt $k -f $OBJ/hkr.$k -N '' || fatal "ssh-keygen $k" ${SSHKEYGEN} -qt $k -f $OBJ/hkr.$k -N '' || fatal "ssh-keygen $k"
echo "Hostkey $OBJ/hkr.${k}" >> $OBJ/sshd_proxy.orig echo "Hostkey $OBJ/hkr.${k}" >> $OBJ/sshd_proxy.orig
nkeys=`expr $nkeys + 1` nkeys=`expr $nkeys + 1`
test "x$all_algs" = "x" || all_algs="${all_algs}," test "x$all_algs" = "x" || all_algs="${all_algs},"
all_algs="${all_algs}$k" all_algs="${all_algs}$k"
case "$k" in
ssh-rsa) secondary="ssh-rsa" ;;
esac
done done
dossh() { dossh() {
@ -49,62 +57,68 @@ cp $OBJ/sshd_proxy.orig $OBJ/sshd_proxy
# Connect to sshd with StrictHostkeyChecking=no # Connect to sshd with StrictHostkeyChecking=no
verbose "learn hostkey with StrictHostKeyChecking=no" verbose "learn hostkey with StrictHostKeyChecking=no"
>$OBJ/known_hosts >$OBJ/known_hosts
dossh -oHostKeyAlgorithms=ssh-ed25519 -oStrictHostKeyChecking=no dossh -oHostKeyAlgorithms=$primary -oStrictHostKeyChecking=no
# Verify no additional keys learned # Verify no additional keys learned
expect_nkeys 1 "unstrict connect keys" expect_nkeys 1 "unstrict connect keys"
check_key_present ssh-ed25519 || fail "unstrict didn't learn key" check_key_present $primary || fail "unstrict didn't learn key"
# Connect to sshd as usual # Connect to sshd as usual
verbose "learn additional hostkeys" verbose "learn additional hostkeys"
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$all_algs dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$all_algs
# Check that other keys learned # Check that other keys learned
expect_nkeys $nkeys "learn hostkeys" expect_nkeys $nkeys "learn hostkeys"
check_key_present ssh-rsa || fail "didn't learn keys" for k in $HOSTKEY_TYPES; do
check_key_present $k || fail "didn't learn keytype $k"
done
# Check each key type # Check each key type
for k in `${SSH} -Q key-plain` ; do for k in $HOSTKEY_TYPES; do
verbose "learn additional hostkeys, type=$k" verbose "learn additional hostkeys, type=$k"
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$k,$all_algs dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$k,$all_algs
expect_nkeys $nkeys "learn hostkeys $k" expect_nkeys $nkeys "learn hostkeys $k"
check_key_present $k || fail "didn't learn $k" check_key_present $k || fail "didn't learn $k correctly"
done done
# Change one hostkey (non primary) and relearn # Change one hostkey (non primary) and relearn
verbose "learn changed non-primary hostkey" if [ "$primary" != "$secondary" ]; then
mv $OBJ/hkr.ssh-rsa.pub $OBJ/hkr.ssh-rsa.pub.old verbose "learn changed non-primary hostkey type=${secondary}"
rm -f $OBJ/hkr.ssh-rsa mv $OBJ/hkr.${secondary}.pub $OBJ/hkr.${secondary}.pub.old
${SSHKEYGEN} -qt ssh-rsa -f $OBJ/hkr.ssh-rsa -N '' || fatal "ssh-keygen $k" rm -f $OBJ/hkr.${secondary}
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$all_algs ${SSHKEYGEN} -qt ${secondary} -f $OBJ/hkr.${secondary} -N '' || \
# Check that the key was replaced fatal "ssh-keygen $secondary"
expect_nkeys $nkeys "learn hostkeys" dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=$all_algs
check_key_present ssh-rsa $OBJ/hkr.ssh-rsa.pub.old && fail "old key present" # Check that the key was replaced
check_key_present ssh-rsa || fail "didn't learn changed key" expect_nkeys $nkeys "learn hostkeys"
check_key_present ${secondary} $OBJ/hkr.${secondary}.pub.old && \
fail "old key present"
check_key_present ${secondary} || fail "didn't learn changed key"
fi
# Add new hostkey (primary type) to sshd and connect # Add new hostkey (primary type) to sshd and connect
verbose "learn new primary hostkey" verbose "learn new primary hostkey"
${SSHKEYGEN} -qt ssh-rsa -f $OBJ/hkr.ssh-rsa-new -N '' || fatal "ssh-keygen $k" ${SSHKEYGEN} -qt ${primary} -f $OBJ/hkr.${primary}-new -N '' || fatal "ssh-keygen ed25519"
( cat $OBJ/sshd_proxy.orig ; echo HostKey $OBJ/hkr.ssh-rsa-new ) \ ( cat $OBJ/sshd_proxy.orig ; echo HostKey $OBJ/hkr.${primary}-new ) \
> $OBJ/sshd_proxy > $OBJ/sshd_proxy
# Check new hostkey added # Check new hostkey added
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=ssh-rsa,$all_algs dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=${primary},$all_algs
expect_nkeys `expr $nkeys + 1` "learn hostkeys" expect_nkeys `expr $nkeys + 1` "learn hostkeys"
check_key_present ssh-rsa || fail "current key missing" check_key_present ${primary} || fail "current key missing"
check_key_present ssh-rsa $OBJ/hkr.ssh-rsa-new.pub || fail "new key missing" check_key_present ${primary} $OBJ/hkr.${primary}-new.pub || fail "new key missing"
# Remove old hostkey (primary type) from sshd # Remove old hostkey (primary type) from sshd
verbose "rotate primary hostkey" verbose "rotate primary hostkey"
cp $OBJ/sshd_proxy.orig $OBJ/sshd_proxy cp $OBJ/sshd_proxy.orig $OBJ/sshd_proxy
mv $OBJ/hkr.ssh-rsa.pub $OBJ/hkr.ssh-rsa.pub.old mv $OBJ/hkr.${primary}.pub $OBJ/hkr.${primary}.pub.old
mv $OBJ/hkr.ssh-rsa-new.pub $OBJ/hkr.ssh-rsa.pub mv $OBJ/hkr.${primary}-new.pub $OBJ/hkr.${primary}.pub
mv $OBJ/hkr.ssh-rsa-new $OBJ/hkr.ssh-rsa mv $OBJ/hkr.${primary}-new $OBJ/hkr.${primary}
# Check old hostkey removed # Check old hostkey removed
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=ssh-rsa,$all_algs dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=${primary},$all_algs
expect_nkeys $nkeys "learn hostkeys" expect_nkeys $nkeys "learn hostkeys"
check_key_present ssh-rsa $OBJ/hkr.ssh-rsa.pub.old && fail "old key present" check_key_present ${primary} $OBJ/hkr.${primary}.pub.old && fail "old key present"
check_key_present ssh-rsa || fail "didn't learn changed key" check_key_present ${primary} || fail "didn't learn changed key"
# Connect again, forcing rotated key # Connect again, forcing rotated key
verbose "check rotate primary hostkey" verbose "check rotate primary hostkey"
dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=ssh-rsa dossh -oStrictHostKeyChecking=yes -oHostKeyAlgorithms=${primary}
expect_nkeys 1 "learn hostkeys" expect_nkeys 1 "learn hostkeys"
check_key_present ssh-rsa || fail "didn't learn changed key" check_key_present ${primary} || fail "didn't learn changed key"