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# $OpenBSD: cert-hostkey.sh,v 1.3 2010/03/04 10:38:23 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 $OBJ/host_ca_key ||\
fail "ssh-keygen of host_ca_key failed"
(
echon '@cert-authority '
echon "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
# Generate and sign host keys
for ktype in rsa dsa ; do
verbose "$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_${ktype}"
done
# Basic connect tests
for privsep in yes no ; do
for ktype in rsa dsa ; do
verbose "$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 [ $? -ne 0 ]; then
fail "ssh cert connect failed"
fi
done
done
# Revoked certificates with key present
(
echon '@cert-authority '
echon "$HOSTS "
cat $OBJ/host_ca_key.pub
echon '@revoked '
echon "* "
cat $OBJ/cert_host_key_rsa.pub
echon '@revoked '
echon "* "
cat $OBJ/cert_host_key_dsa.pub
) > $OBJ/known_hosts-cert
for privsep in yes no ; do
for ktype in rsa dsa ; do
verbose "$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 [ $? -eq 0 ]; then
fail "ssh cert connect succeeded unexpectedly"
fi
done
done
# Revoked CA
(
echon '@cert-authority '
echon "$HOSTS "
cat $OBJ/host_ca_key.pub
echon '@revoked '
echon "* "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
for ktype in rsa dsa ; do
verbose "$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 [ $? -eq 0 ]; then
fail "ssh cert connect succeeded unexpectedly"
fi
done
# Create a CA key and add it to known hosts
(
echon '@cert-authority '
echon "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
test_one() {
ident=$1
result=$2
sign_opts=$3
verbose "$tid: test host cert connect $ident expect $result"
${SSHKEYGEN} -q -s $OBJ/host_ca_key -I "regress host key for $USER" \
$sign_opts \
$OBJ/cert_host_key_rsa ||
fail "couldn't sign cert_host_key_rsa"
(
cat $OBJ/sshd_proxy_bak
echo HostKey $OBJ/cert_host_key_rsa
echo HostCertificate $OBJ/cert_host_key_rsa-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
}
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
rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key*
for ktype in rsa dsa ; do
verbose "$tid: host ${ktype} 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} -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_${ktype}"
(
echon "$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 [ $? -ne 0 ]; then
fail "ssh cert connect failed"
fi
done
# Wrong certificate
(
echon '@cert-authority '
echon "$HOSTS "
cat $OBJ/host_ca_key.pub
) > $OBJ/known_hosts-cert
for ktype in rsa dsa ; do
# Self-sign key
${SSHKEYGEN} -h -q -s $OBJ/cert_host_key_${ktype} \
-I "regress host key for $USER" \
-n $HOSTS $OBJ/cert_host_key_${ktype} ||
fail "couldn't sign cert_host_key_${ktype}"
verbose "$tid: host ${ktype} connect wrong 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 -q somehost true >/dev/null 2>&1
if [ $? -eq 0 ]; then
fail "ssh cert connect $ident succeeded unexpectedly"
fi
done
rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key*
|
