# $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*