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# $OpenBSD: cert-hostkey.sh,v 1.9 2014/01/26 10:22:10 djm Exp $
# Placed in the Public Domain.
tid="certified host keys"
rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key*
cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
HOSTS='localhost-with-alias,127.0.0.1,::1'
# Create a CA key and add it to known hosts
${SSHKEYGEN} -q -N '' -t rsa -f $OBJ/host_ca_key ||\
fail "ssh-keygen of host_ca_key failed"
(
printf '@cert-authority '
printf "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
PLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/g;s/^ssh-//'`
type_has_legacy() {
case $1 in
ed25519*|ecdsa*) return 1 ;;
esac
return 0
}
# Generate and sign host keys
for ktype in $PLAIN_TYPES ; do
verbose "$tid: sign host ${ktype} cert"
# Generate and sign a host key
${SSHKEYGEN} -q -N '' -t ${ktype} \
-f $OBJ/cert_host_key_${ktype} || \
fail "ssh-keygen of cert_host_key_${ktype} failed"
${SSHKEYGEN} -h -q -s $OBJ/host_ca_key \
-I "regress host key for $USER" \
-n $HOSTS $OBJ/cert_host_key_${ktype} ||
fail "couldn't sign cert_host_key_${ktype}"
type_has_legacy $ktype || continue
cp $OBJ/cert_host_key_${ktype} $OBJ/cert_host_key_${ktype}_v00
cp $OBJ/cert_host_key_${ktype}.pub $OBJ/cert_host_key_${ktype}_v00.pub
verbose "$tid: sign host ${ktype}_v00 cert"
${SSHKEYGEN} -t v00 -h -q -s $OBJ/host_ca_key \
-I "regress host key for $USER" \
-n $HOSTS $OBJ/cert_host_key_${ktype}_v00 ||
fail "couldn't sign cert_host_key_${ktype}_v00"
done
# Basic connect tests
for privsep in yes no ; do
for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do
verbose "$tid: host ${ktype} cert connect privsep $privsep"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${ktype}
echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
echo UsePrivilegeSeparation $privsep
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy somehost true
if [ $? -ne 0 ]; then
fail "ssh cert connect failed"
fi
done
done
# Revoked certificates with key present
(
printf '@cert-authority '
printf "$HOSTS "
cat $OBJ/host_ca_key.pub
for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do
test -f "$OBJ/cert_host_key_${ktype}.pub" || fatal "no pubkey"
printf "@revoked * `cat $OBJ/cert_host_key_${ktype}.pub`\n"
done
) > $OBJ/known_hosts-cert
for privsep in yes no ; do
for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do
verbose "$tid: host ${ktype} revoked cert privsep $privsep"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${ktype}
echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
echo UsePrivilegeSeparation $privsep
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
if [ $? -eq 0 ]; then
fail "ssh cert connect succeeded unexpectedly"
fi
done
done
# Revoked CA
(
printf '@cert-authority '
printf "$HOSTS "
cat $OBJ/host_ca_key.pub
printf '@revoked '
printf "* "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
for ktype in $PLAIN_TYPES rsa_v00 dsa_v00 ; do
verbose "$tid: host ${ktype} revoked cert"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${ktype}
echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
if [ $? -eq 0 ]; then
fail "ssh cert connect succeeded unexpectedly"
fi
done
# Create a CA key and add it to known hosts
(
printf '@cert-authority '
printf "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
test_one() {
ident=$1
result=$2
sign_opts=$3
for kt in rsa rsa_v00 ; do
case $kt in
*_v00) args="-t v00" ;;
*) args="" ;;
esac
verbose "$tid: host cert connect $ident $kt expect $result"
${SSHKEYGEN} -q -s $OBJ/host_ca_key \
-I "regress host key for $USER" \
$sign_opts $args \
$OBJ/cert_host_key_${kt} ||
fail "couldn't sign cert_host_key_${kt}"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${kt}
echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
rc=$?
if [ "x$result" = "xsuccess" ] ; then
if [ $rc -ne 0 ]; then
fail "ssh cert connect $ident failed unexpectedly"
fi
else
if [ $rc -eq 0 ]; then
fail "ssh cert connect $ident succeeded unexpectedly"
fi
fi
done
}
test_one "user-certificate" failure "-n $HOSTS"
test_one "empty principals" success "-h"
test_one "wrong principals" failure "-h -n foo"
test_one "cert not yet valid" failure "-h -V20200101:20300101"
test_one "cert expired" failure "-h -V19800101:19900101"
test_one "cert valid interval" success "-h -V-1w:+2w"
test_one "cert has constraints" failure "-h -Oforce-command=false"
# Check downgrade of cert to raw key when no CA found
for v in v01 v00 ; do
for ktype in $PLAIN_TYPES ; do
type_has_legacy $ktype || continue
rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key*
verbose "$tid: host ${ktype} ${v} cert downgrade to raw key"
# Generate and sign a host key
${SSHKEYGEN} -q -N '' -t ${ktype} \
-f $OBJ/cert_host_key_${ktype} || \
fail "ssh-keygen of cert_host_key_${ktype} failed"
${SSHKEYGEN} -t ${v} -h -q -s $OBJ/host_ca_key \
-I "regress host key for $USER" \
-n $HOSTS $OBJ/cert_host_key_${ktype} ||
fail "couldn't sign cert_host_key_${ktype}"
(
printf "$HOSTS "
cat $OBJ/cert_host_key_${ktype}.pub
) > $OBJ/known_hosts-cert
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${ktype}
echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy somehost true
if [ $? -ne 0 ]; then
fail "ssh cert connect failed"
fi
done
done
# Wrong certificate
(
printf '@cert-authority '
printf "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
for v in v01 v00 ; do
for kt in $PLAIN_TYPES ; do
type_has_legacy $kt || continue
rm -f $OBJ/cert_host_key*
# Self-sign key
${SSHKEYGEN} -q -N '' -t ${kt} \
-f $OBJ/cert_host_key_${kt} || \
fail "ssh-keygen of cert_host_key_${kt} failed"
${SSHKEYGEN} -t ${v} -h -q -s $OBJ/cert_host_key_${kt} \
-I "regress host key for $USER" \
-n $HOSTS $OBJ/cert_host_key_${kt} ||
fail "couldn't sign cert_host_key_${kt}"
verbose "$tid: host ${kt} connect wrong cert"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_${kt}
echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub
) > $OBJ/sshd_proxy
${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
-F $OBJ/ssh_proxy -q somehost true >/dev/null 2>&1
if [ $? -eq 0 ]; then
fail "ssh cert connect $ident succeeded unexpectedly"
fi
done
done
rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key*
|
