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-rw-r--r--regress/cert-hostkey.sh325
1 files changed, 325 insertions, 0 deletions
diff --git a/regress/cert-hostkey.sh b/regress/cert-hostkey.sh
new file mode 100644
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--- /dev/null
+++ b/regress/cert-hostkey.sh
@@ -0,0 +1,325 @@
+# $OpenBSD: cert-hostkey.sh,v 1.27 2021/09/30 05:26:26 dtucker 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* $OBJ/host_krl_*
+
+# Allow all hostkey/pubkey types, prefer certs for the client
+rsa=0
+types=""
+for i in `$SSH -Q key | maybe_filter_sk`; do
+ if [ -z "$types" ]; then
+ types="$i"
+ continue
+ fi
+ case "$i" in
+ # Special treatment for RSA keys.
+ *rsa*cert*)
+ types="rsa-sha2-256-cert-v01@openssh.com,$i,$types"
+ types="rsa-sha2-512-cert-v01@openssh.com,$types";;
+ *rsa*)
+ rsa=1
+ types="$types,rsa-sha2-512,rsa-sha2-256,$i";;
+ # Prefer certificate to plain keys.
+ *cert*) types="$i,$types";;
+ *) types="$types,$i";;
+ esac
+done
+(
+ echo "HostKeyAlgorithms ${types}"
+ echo "PubkeyAcceptedAlgorithms *"
+) >> $OBJ/ssh_proxy
+cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
+(
+ echo "HostKeyAlgorithms *"
+ echo "PubkeyAcceptedAlgorithms *"
+) >> $OBJ/sshd_proxy_bak
+
+HOSTS='localhost-with-alias,127.0.0.1,::1'
+
+kh_ca() {
+ for k in "$@" ; 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 $k"
+ done
+}
+
+# Create a CA key and add it to known hosts. Ed25519 chosen for speed.
+# RSA for testing RSA/SHA2 signatures if supported.
+ktype2=ed25519
+[ "x$rsa" = "x1" ] && ktype2=rsa
+${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/host_ca_key ||\
+ fail "ssh-keygen of host_ca_key failed"
+${SSHKEYGEN} -q -N '' -t $ktype2 -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 > $OBJ/host_revoked_ca
+
+PLAIN_TYPES=`echo "$SSH_KEYTYPES" | 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 ktype in $PLAIN_TYPES ; do
+ verbose "$tid: host ${ktype} cert connect"
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo HostKey $OBJ/cert_host_key_${ktype}
+ echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
+ ) > $OBJ/sshd_proxy
+
+ # test name expect success
+ attempt_connect "$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
+
+# 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 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
+
+# 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 $PLAIN_TYPES; 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 -V20300101:20320101"
+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=none -F $OBJ/ssh_proxy somehost true
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+ # Also check that it works when the known_hosts file is not in the
+ # first array position.
+ ${SSH} -oUserKnownHostsFile="/dev/null $OBJ/known_hosts-cert" \
+ -oGlobalKnownHostsFile=none -F $OBJ/ssh_proxy somehost true
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed known_hosts 2nd"
+ 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*