| # $OpenBSD: cert-hostkey.sh,v 1.14 2016/05/02 09:52:00 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 |
| ${SSH} -2 -oUserKnownHostsFile=$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 |
| ${SSH} -2 -oUserKnownHostsFile=$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 |
| 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 |
| ${SSH} -2 -oUserKnownHostsFile=$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 |
| 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 |
| ${SSH} -2 -oUserKnownHostsFile=$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 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 |
| |
| ${SSH} -2 -oUserKnownHostsFile=$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 |
| 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 |
| ${SSH} -2 -oUserKnownHostsFile=$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* |