315 lines
10 KiB
Bash
315 lines
10 KiB
Bash
# $OpenBSD: cert-hostkey.sh,v 1.15 2017/04/30 23:34:55 djm Exp $
|
|
# Placed in the Public Domain.
|
|
|
|
tid="certified host keys"
|
|
|
|
rm -f $OBJ/known_hosts-cert* $OBJ/host_ca_key* $OBJ/host_revoked_*
|
|
rm -f $OBJ/cert_host_key* $OBJ/host_krl_*
|
|
|
|
# Allow all hostkey/pubkey types, prefer certs for the client
|
|
types=""
|
|
for i in `$SSH -Q key`; do
|
|
if [ -z "$types" ]; then
|
|
types="$i"
|
|
continue
|
|
fi
|
|
case "$i" in
|
|
*cert*) types="$i,$types";;
|
|
*) types="$types,$i";;
|
|
esac
|
|
done
|
|
(
|
|
echo "HostKeyAlgorithms ${types}"
|
|
echo "PubkeyAcceptedKeyTypes *"
|
|
) >> $OBJ/ssh_proxy
|
|
cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
|
|
(
|
|
echo "HostKeyAlgorithms *"
|
|
echo "PubkeyAcceptedKeyTypes *"
|
|
) >> $OBJ/sshd_proxy_bak
|
|
|
|
HOSTS='localhost-with-alias,127.0.0.1,::1'
|
|
|
|
kh_ca() {
|
|
for k in "$@" ; do
|
|
printf "@cert-authority $HOSTS "
|
|
cat $OBJ/$k || fatal "couldn't cat $k"
|
|
done
|
|
}
|
|
kh_revoke() {
|
|
for k in "$@" ; do
|
|
printf "@revoked * "
|
|
cat $OBJ/$k || fatal "couldn't cat $k"
|
|
done
|
|
}
|
|
|
|
# Create a CA key and add it to known hosts. Ed25519 chosen for speed.
|
|
# RSA for testing RSA/SHA2 signatures.
|
|
${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/host_ca_key ||\
|
|
fail "ssh-keygen of host_ca_key failed"
|
|
${SSHKEYGEN} -q -N '' -t rsa -f $OBJ/host_ca_key2 ||\
|
|
fail "ssh-keygen of host_ca_key failed"
|
|
|
|
kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
|
|
# Plain text revocation files
|
|
touch $OBJ/host_revoked_empty
|
|
touch $OBJ/host_revoked_plain
|
|
touch $OBJ/host_revoked_cert
|
|
cat $OBJ/host_ca_key.pub $OBJ/host_ca_key2.pub > $OBJ/host_revoked_ca
|
|
|
|
PLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/g;s/^ssh-//'`
|
|
|
|
if echo "$PLAIN_TYPES" | grep '^rsa$' >/dev/null 2>&1 ; then
|
|
PLAIN_TYPES="$PLAIN_TYPES rsa-sha2-256 rsa-sha2-512"
|
|
fi
|
|
|
|
# Prepare certificate, plain key and CA KRLs
|
|
${SSHKEYGEN} -kf $OBJ/host_krl_empty || fatal "KRL init failed"
|
|
${SSHKEYGEN} -kf $OBJ/host_krl_plain || fatal "KRL init failed"
|
|
${SSHKEYGEN} -kf $OBJ/host_krl_cert || fatal "KRL init failed"
|
|
${SSHKEYGEN} -kf $OBJ/host_krl_ca $OBJ/host_ca_key.pub $OBJ/host_ca_key2.pub \
|
|
|| fatal "KRL init failed"
|
|
|
|
# Generate and sign host keys
|
|
serial=1
|
|
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} || \
|
|
fatal "ssh-keygen of cert_host_key_${ktype} failed"
|
|
${SSHKEYGEN} -ukf $OBJ/host_krl_plain \
|
|
$OBJ/cert_host_key_${ktype}.pub || fatal "KRL update failed"
|
|
cat $OBJ/cert_host_key_${ktype}.pub >> $OBJ/host_revoked_plain
|
|
case $ktype in
|
|
rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;;
|
|
*) tflag=""; ca="$OBJ/host_ca_key" ;;
|
|
esac
|
|
${SSHKEYGEN} -h -q -s $ca -z $serial $tflag \
|
|
-I "regress host key for $USER" \
|
|
-n $HOSTS $OBJ/cert_host_key_${ktype} ||
|
|
fatal "couldn't sign cert_host_key_${ktype}"
|
|
${SSHKEYGEN} -ukf $OBJ/host_krl_cert \
|
|
$OBJ/cert_host_key_${ktype}-cert.pub || \
|
|
fatal "KRL update failed"
|
|
cat $OBJ/cert_host_key_${ktype}-cert.pub >> $OBJ/host_revoked_cert
|
|
serial=`expr $serial + 1`
|
|
done
|
|
|
|
attempt_connect() {
|
|
_ident="$1"
|
|
_expect_success="$2"
|
|
shift; shift
|
|
verbose "$tid: $_ident expect success $_expect_success"
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
${SSH} -oUserKnownHostsFile=$OBJ/known_hosts-cert \
|
|
-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
|
|
"$@" -F $OBJ/ssh_proxy somehost true
|
|
_r=$?
|
|
if [ "x$_expect_success" = "xyes" ] ; then
|
|
if [ $_r -ne 0 ]; then
|
|
fail "ssh cert connect $_ident failed"
|
|
fi
|
|
else
|
|
if [ $_r -eq 0 ]; then
|
|
fail "ssh cert connect $_ident succeeded unexpectedly"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# Basic connect and revocation tests.
|
|
for privsep in yes no ; do
|
|
for ktype in $PLAIN_TYPES ; do
|
|
verbose "$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
|
|
) > $OBJ/sshd_proxy
|
|
|
|
# test name expect success
|
|
attempt_connect "$ktype basic connect" "yes"
|
|
attempt_connect "$ktype empty KRL" "yes" \
|
|
-oRevokedHostKeys=$OBJ/host_krl_empty
|
|
attempt_connect "$ktype KRL w/ plain key revoked" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_krl_plain
|
|
attempt_connect "$ktype KRL w/ cert revoked" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_krl_cert
|
|
attempt_connect "$ktype KRL w/ CA revoked" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_krl_ca
|
|
attempt_connect "$ktype empty plaintext revocation" "yes" \
|
|
-oRevokedHostKeys=$OBJ/host_revoked_empty
|
|
attempt_connect "$ktype plain key plaintext revocation" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_revoked_plain
|
|
attempt_connect "$ktype cert plaintext revocation" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_revoked_cert
|
|
attempt_connect "$ktype CA plaintext revocation" "no" \
|
|
-oRevokedHostKeys=$OBJ/host_revoked_ca
|
|
done
|
|
done
|
|
|
|
# Revoked certificates with key present
|
|
kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig
|
|
for ktype in $PLAIN_TYPES ; do
|
|
test -f "$OBJ/cert_host_key_${ktype}.pub" || fatal "no pubkey"
|
|
kh_revoke cert_host_key_${ktype}.pub >> $OBJ/known_hosts-cert.orig
|
|
done
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
for privsep in yes no ; do
|
|
for ktype in $PLAIN_TYPES ; do
|
|
verbose "$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
|
|
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
${SSH} -oUserKnownHostsFile=$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
|
|
kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig
|
|
kh_revoke host_ca_key.pub host_ca_key2.pub >> $OBJ/known_hosts-cert.orig
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
for ktype in $PLAIN_TYPES ; do
|
|
verbose "$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
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
${SSH} -oUserKnownHostsFile=$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
|
|
kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
|
|
test_one() {
|
|
ident=$1
|
|
result=$2
|
|
sign_opts=$3
|
|
|
|
for kt in rsa ed25519 ; do
|
|
case $ktype in
|
|
rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;;
|
|
*) tflag=""; ca="$OBJ/host_ca_key" ;;
|
|
esac
|
|
${SSHKEYGEN} -q -s $ca $tflag -I "regress host key for $USER" \
|
|
$sign_opts $OBJ/cert_host_key_${kt} ||
|
|
fatal "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
|
|
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
${SSH} -oUserKnownHostsFile=$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 ktype in $PLAIN_TYPES ; do
|
|
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"
|
|
case $ktype in
|
|
rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;;
|
|
*) tflag=""; ca="$OBJ/host_ca_key" ;;
|
|
esac
|
|
${SSHKEYGEN} -h -q $tflag -s $ca $tflag \
|
|
-I "regress host key for $USER" \
|
|
-n $HOSTS $OBJ/cert_host_key_${ktype} ||
|
|
fatal "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
|
|
|
|
${SSH} -oUserKnownHostsFile=$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
|
|
kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
for kt in $PLAIN_TYPES ; do
|
|
verbose "$tid: host ${kt} connect wrong cert"
|
|
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"
|
|
case $kt in
|
|
rsa-sha2-*) tflag="-t $kt" ;;
|
|
*) tflag="" ;;
|
|
esac
|
|
${SSHKEYGEN} $tflag -h -q -s $OBJ/cert_host_key_${kt} \
|
|
-I "regress host key for $USER" \
|
|
-n $HOSTS $OBJ/cert_host_key_${kt} ||
|
|
fatal "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
|
|
|
|
cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert
|
|
${SSH} -oUserKnownHostsFile=$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*
|