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314 lines
10 KiB
314 lines
10 KiB
# $OpenBSD: cert-hostkey.sh,v 1.14 2016/05/02 09:52:00 djm Exp $ |
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# Placed in the Public Domain. |
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tid="certified host keys" |
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rm -f $OBJ/known_hosts-cert* $OBJ/host_ca_key* $OBJ/host_revoked_* |
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rm -f $OBJ/cert_host_key* $OBJ/host_krl_* |
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# Allow all hostkey/pubkey types, prefer certs for the client |
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types="" |
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for i in `$SSH -Q key`; do |
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if [ -z "$types" ]; then |
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types="$i" |
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continue |
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fi |
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case "$i" in |
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*cert*) types="$i,$types";; |
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*) types="$types,$i";; |
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esac |
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done |
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( |
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echo "HostKeyAlgorithms ${types}" |
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echo "PubkeyAcceptedKeyTypes *" |
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) >> $OBJ/ssh_proxy |
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cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak |
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( |
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echo "HostKeyAlgorithms *" |
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echo "PubkeyAcceptedKeyTypes *" |
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) >> $OBJ/sshd_proxy_bak |
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HOSTS='localhost-with-alias,127.0.0.1,::1' |
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kh_ca() { |
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for k in "$@" ; do |
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printf "@cert-authority $HOSTS " |
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cat $OBJ/$k || fatal "couldn't cat $k" |
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done |
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} |
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kh_revoke() { |
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for k in "$@" ; do |
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printf "@revoked * " |
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cat $OBJ/$k || fatal "couldn't cat $k" |
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done |
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} |
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# Create a CA key and add it to known hosts. Ed25519 chosen for speed. |
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# RSA for testing RSA/SHA2 signatures. |
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${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/host_ca_key ||\ |
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fail "ssh-keygen of host_ca_key failed" |
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${SSHKEYGEN} -q -N '' -t rsa -f $OBJ/host_ca_key2 ||\ |
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fail "ssh-keygen of host_ca_key failed" |
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kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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# Plain text revocation files |
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touch $OBJ/host_revoked_empty |
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touch $OBJ/host_revoked_plain |
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touch $OBJ/host_revoked_cert |
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cat $OBJ/host_ca_key.pub $OBJ/host_ca_key2.pub > $OBJ/host_revoked_ca |
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PLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/g;s/^ssh-//'` |
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if echo "$PLAIN_TYPES" | grep '^rsa$' >/dev/null 2>&1 ; then |
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PLAIN_TYPES="$PLAIN_TYPES rsa-sha2-256 rsa-sha2-512" |
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fi |
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# Prepare certificate, plain key and CA KRLs |
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${SSHKEYGEN} -kf $OBJ/host_krl_empty || fatal "KRL init failed" |
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${SSHKEYGEN} -kf $OBJ/host_krl_plain || fatal "KRL init failed" |
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${SSHKEYGEN} -kf $OBJ/host_krl_cert || fatal "KRL init failed" |
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${SSHKEYGEN} -kf $OBJ/host_krl_ca $OBJ/host_ca_key.pub $OBJ/host_ca_key2.pub \ |
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|| fatal "KRL init failed" |
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# Generate and sign host keys |
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serial=1 |
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for ktype in $PLAIN_TYPES ; do |
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verbose "$tid: sign host ${ktype} cert" |
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# Generate and sign a host key |
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${SSHKEYGEN} -q -N '' -t ${ktype} \ |
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-f $OBJ/cert_host_key_${ktype} || \ |
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fatal "ssh-keygen of cert_host_key_${ktype} failed" |
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${SSHKEYGEN} -ukf $OBJ/host_krl_plain \ |
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$OBJ/cert_host_key_${ktype}.pub || fatal "KRL update failed" |
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cat $OBJ/cert_host_key_${ktype}.pub >> $OBJ/host_revoked_plain |
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case $ktype in |
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rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;; |
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*) tflag=""; ca="$OBJ/host_ca_key" ;; |
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esac |
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${SSHKEYGEN} -h -q -s $ca -z $serial $tflag \ |
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-I "regress host key for $USER" \ |
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-n $HOSTS $OBJ/cert_host_key_${ktype} || |
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fatal "couldn't sign cert_host_key_${ktype}" |
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${SSHKEYGEN} -ukf $OBJ/host_krl_cert \ |
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$OBJ/cert_host_key_${ktype}-cert.pub || \ |
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fatal "KRL update failed" |
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cat $OBJ/cert_host_key_${ktype}-cert.pub >> $OBJ/host_revoked_cert |
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serial=`expr $serial + 1` |
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done |
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attempt_connect() { |
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_ident="$1" |
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_expect_success="$2" |
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shift; shift |
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verbose "$tid: $_ident expect success $_expect_success" |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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"$@" -F $OBJ/ssh_proxy somehost true |
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_r=$? |
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if [ "x$_expect_success" = "xyes" ] ; then |
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if [ $_r -ne 0 ]; then |
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fail "ssh cert connect $_ident failed" |
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fi |
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else |
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if [ $_r -eq 0 ]; then |
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fail "ssh cert connect $_ident succeeded unexpectedly" |
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fi |
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fi |
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} |
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# Basic connect and revocation tests. |
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for privsep in yes no ; do |
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for ktype in $PLAIN_TYPES ; do |
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verbose "$tid: host ${ktype} cert connect privsep $privsep" |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${ktype} |
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echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub |
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echo UsePrivilegeSeparation $privsep |
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) > $OBJ/sshd_proxy |
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# test name expect success |
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attempt_connect "$ktype basic connect" "yes" |
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attempt_connect "$ktype empty KRL" "yes" \ |
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-oRevokedHostKeys=$OBJ/host_krl_empty |
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attempt_connect "$ktype KRL w/ plain key revoked" "no" \ |
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-oRevokedHostKeys=$OBJ/host_krl_plain |
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attempt_connect "$ktype KRL w/ cert revoked" "no" \ |
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-oRevokedHostKeys=$OBJ/host_krl_cert |
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attempt_connect "$ktype KRL w/ CA revoked" "no" \ |
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-oRevokedHostKeys=$OBJ/host_krl_ca |
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attempt_connect "$ktype empty plaintext revocation" "yes" \ |
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-oRevokedHostKeys=$OBJ/host_revoked_empty |
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attempt_connect "$ktype plain key plaintext revocation" "no" \ |
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-oRevokedHostKeys=$OBJ/host_revoked_plain |
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attempt_connect "$ktype cert plaintext revocation" "no" \ |
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-oRevokedHostKeys=$OBJ/host_revoked_cert |
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attempt_connect "$ktype CA plaintext revocation" "no" \ |
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-oRevokedHostKeys=$OBJ/host_revoked_ca |
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done |
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done |
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# Revoked certificates with key present |
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kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig |
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for ktype in $PLAIN_TYPES ; do |
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test -f "$OBJ/cert_host_key_${ktype}.pub" || fatal "no pubkey" |
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kh_revoke cert_host_key_${ktype}.pub >> $OBJ/known_hosts-cert.orig |
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done |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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for privsep in yes no ; do |
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for ktype in $PLAIN_TYPES ; do |
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verbose "$tid: host ${ktype} revoked cert privsep $privsep" |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${ktype} |
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echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub |
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echo UsePrivilegeSeparation $privsep |
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) > $OBJ/sshd_proxy |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 |
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if [ $? -eq 0 ]; then |
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fail "ssh cert connect succeeded unexpectedly" |
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fi |
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done |
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done |
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# Revoked CA |
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kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig |
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kh_revoke host_ca_key.pub host_ca_key2.pub >> $OBJ/known_hosts-cert.orig |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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for ktype in $PLAIN_TYPES ; do |
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verbose "$tid: host ${ktype} revoked cert" |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${ktype} |
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echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub |
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) > $OBJ/sshd_proxy |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 |
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if [ $? -eq 0 ]; then |
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fail "ssh cert connect succeeded unexpectedly" |
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fi |
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done |
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# Create a CA key and add it to known hosts |
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kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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test_one() { |
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ident=$1 |
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result=$2 |
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sign_opts=$3 |
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for kt in rsa ed25519 ; do |
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case $ktype in |
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rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;; |
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*) tflag=""; ca="$OBJ/host_ca_key" ;; |
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esac |
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${SSHKEYGEN} -q -s $ca $tflag -I "regress host key for $USER" \ |
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$sign_opts $OBJ/cert_host_key_${kt} || |
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fatal "couldn't sign cert_host_key_${kt}" |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${kt} |
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echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub |
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) > $OBJ/sshd_proxy |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 |
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rc=$? |
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if [ "x$result" = "xsuccess" ] ; then |
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if [ $rc -ne 0 ]; then |
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fail "ssh cert connect $ident failed unexpectedly" |
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fi |
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else |
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if [ $rc -eq 0 ]; then |
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fail "ssh cert connect $ident succeeded unexpectedly" |
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fi |
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fi |
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done |
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} |
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test_one "user-certificate" failure "-n $HOSTS" |
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test_one "empty principals" success "-h" |
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test_one "wrong principals" failure "-h -n foo" |
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test_one "cert not yet valid" failure "-h -V20200101:20300101" |
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test_one "cert expired" failure "-h -V19800101:19900101" |
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test_one "cert valid interval" success "-h -V-1w:+2w" |
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test_one "cert has constraints" failure "-h -Oforce-command=false" |
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# Check downgrade of cert to raw key when no CA found |
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for ktype in $PLAIN_TYPES ; do |
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rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key* |
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verbose "$tid: host ${ktype} ${v} cert downgrade to raw key" |
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# Generate and sign a host key |
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${SSHKEYGEN} -q -N '' -t ${ktype} -f $OBJ/cert_host_key_${ktype} || \ |
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fail "ssh-keygen of cert_host_key_${ktype} failed" |
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case $ktype in |
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rsa-sha2-*) tflag="-t $ktype"; ca="$OBJ/host_ca_key2" ;; |
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*) tflag=""; ca="$OBJ/host_ca_key" ;; |
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esac |
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${SSHKEYGEN} -h -q $tflag -s $ca $tflag \ |
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-I "regress host key for $USER" \ |
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-n $HOSTS $OBJ/cert_host_key_${ktype} || |
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fatal "couldn't sign cert_host_key_${ktype}" |
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( |
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printf "$HOSTS " |
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cat $OBJ/cert_host_key_${ktype}.pub |
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) > $OBJ/known_hosts-cert |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${ktype} |
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echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub |
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) > $OBJ/sshd_proxy |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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-F $OBJ/ssh_proxy somehost true |
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if [ $? -ne 0 ]; then |
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fail "ssh cert connect failed" |
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fi |
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done |
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# Wrong certificate |
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kh_ca host_ca_key.pub host_ca_key2.pub > $OBJ/known_hosts-cert.orig |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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for kt in $PLAIN_TYPES ; do |
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verbose "$tid: host ${kt} connect wrong cert" |
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rm -f $OBJ/cert_host_key* |
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# Self-sign key |
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${SSHKEYGEN} -q -N '' -t ${kt} -f $OBJ/cert_host_key_${kt} || \ |
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fail "ssh-keygen of cert_host_key_${kt} failed" |
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case $kt in |
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rsa-sha2-*) tflag="-t $kt" ;; |
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*) tflag="" ;; |
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esac |
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${SSHKEYGEN} $tflag -h -q -s $OBJ/cert_host_key_${kt} \ |
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-I "regress host key for $USER" \ |
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-n $HOSTS $OBJ/cert_host_key_${kt} || |
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fatal "couldn't sign cert_host_key_${kt}" |
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( |
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cat $OBJ/sshd_proxy_bak |
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echo HostKey $OBJ/cert_host_key_${kt} |
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echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub |
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) > $OBJ/sshd_proxy |
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cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert |
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${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ |
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-oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ |
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-F $OBJ/ssh_proxy -q somehost true >/dev/null 2>&1 |
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if [ $? -eq 0 ]; then |
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fail "ssh cert connect $ident succeeded unexpectedly" |
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fi |
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done |
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rm -f $OBJ/known_hosts-cert* $OBJ/host_ca_key* $OBJ/cert_host_key*
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