diff options
Diffstat (limited to '')
| -rw-r--r-- | regress/cert-hostkey.sh | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/regress/cert-hostkey.sh b/regress/cert-hostkey.sh new file mode 100644 index 0000000..a3414e1 --- /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* |