1295367Sdes# $OpenBSD: cert-hostkey.sh,v 1.13 2015/07/10 06:23:25 markus Exp $ 2204861Sdes# Placed in the Public Domain. 3204861Sdes 4204861Sdestid="certified host keys" 5204861Sdes 6295367Sdesrm -f $OBJ/known_hosts-cert* $OBJ/host_ca_key* $OBJ/host_revoked_* 7295367Sdesrm -f $OBJ/cert_host_key* $OBJ/host_krl_* 8295367Sdes 9295367Sdes# Allow all hostkey/pubkey types, prefer certs for the client 10295367Sdestypes="" 11295367Sdesfor i in `$SSH -Q key`; do 12295367Sdes if [ -z "$types" ]; then 13295367Sdes types="$i" 14295367Sdes continue 15295367Sdes fi 16295367Sdes case "$i" in 17295367Sdes *cert*) types="$i,$types";; 18295367Sdes *) types="$types,$i";; 19295367Sdes esac 20295367Sdesdone 21295367Sdes( 22295367Sdes echo "HostKeyAlgorithms ${types}" 23295367Sdes echo "PubkeyAcceptedKeyTypes *" 24295367Sdes) >> $OBJ/ssh_proxy 25204861Sdescp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak 26295367Sdes( 27295367Sdes echo "HostKeyAlgorithms *" 28295367Sdes echo "PubkeyAcceptedKeyTypes *" 29295367Sdes) >> $OBJ/sshd_proxy_bak 30204861Sdes 31204861SdesHOSTS='localhost-with-alias,127.0.0.1,::1' 32204861Sdes 33295367Sdes# Create a CA key and add it to known hosts. Ed25519 chosed for speed. 34295367Sdes${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/host_ca_key ||\ 35204861Sdes fail "ssh-keygen of host_ca_key failed" 36204861Sdes( 37255670Sdes printf '@cert-authority ' 38255670Sdes printf "$HOSTS " 39204861Sdes cat $OBJ/host_ca_key.pub 40295367Sdes) > $OBJ/known_hosts-cert.orig 41295367Sdescp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 42204861Sdes 43295367Sdes# Plain text revocation files 44295367Sdestouch $OBJ/host_revoked_empty 45295367Sdestouch $OBJ/host_revoked_plain 46295367Sdestouch $OBJ/host_revoked_cert 47295367Sdescp $OBJ/host_ca_key.pub $OBJ/host_revoked_ca 48295367Sdes 49262566SdesPLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/g;s/^ssh-//'` 50262566Sdes 51295367Sdes# Prepare certificate, plain key and CA KRLs 52295367Sdes${SSHKEYGEN} -kf $OBJ/host_krl_empty || fatal "KRL init failed" 53295367Sdes${SSHKEYGEN} -kf $OBJ/host_krl_plain || fatal "KRL init failed" 54295367Sdes${SSHKEYGEN} -kf $OBJ/host_krl_cert || fatal "KRL init failed" 55295367Sdes${SSHKEYGEN} -kf $OBJ/host_krl_ca $OBJ/host_ca_key.pub \ 56295367Sdes || fatal "KRL init failed" 57262566Sdes 58204861Sdes# Generate and sign host keys 59295367Sdesserial=1 60262566Sdesfor ktype in $PLAIN_TYPES ; do 61204861Sdes verbose "$tid: sign host ${ktype} cert" 62204861Sdes # Generate and sign a host key 63204861Sdes ${SSHKEYGEN} -q -N '' -t ${ktype} \ 64204861Sdes -f $OBJ/cert_host_key_${ktype} || \ 65295367Sdes fatal "ssh-keygen of cert_host_key_${ktype} failed" 66295367Sdes ${SSHKEYGEN} -ukf $OBJ/host_krl_plain \ 67295367Sdes $OBJ/cert_host_key_${ktype}.pub || fatal "KRL update failed" 68295367Sdes cat $OBJ/cert_host_key_${ktype}.pub >> $OBJ/host_revoked_plain 69295367Sdes ${SSHKEYGEN} -h -q -s $OBJ/host_ca_key -z $serial \ 70204861Sdes -I "regress host key for $USER" \ 71204861Sdes -n $HOSTS $OBJ/cert_host_key_${ktype} || 72295367Sdes fatal "couldn't sign cert_host_key_${ktype}" 73295367Sdes ${SSHKEYGEN} -ukf $OBJ/host_krl_cert \ 74295367Sdes $OBJ/cert_host_key_${ktype}-cert.pub || \ 75295367Sdes fatal "KRL update failed" 76295367Sdes cat $OBJ/cert_host_key_${ktype}-cert.pub >> $OBJ/host_revoked_cert 77295367Sdes serial=`expr $serial + 1` 78204861Sdesdone 79204861Sdes 80295367Sdesattempt_connect() { 81295367Sdes _ident="$1" 82295367Sdes _expect_success="$2" 83295367Sdes shift; shift 84295367Sdes verbose "$tid: $_ident expect success $_expect_success" 85295367Sdes cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 86295367Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 87295367Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 88295367Sdes "$@" -F $OBJ/ssh_proxy somehost true 89295367Sdes _r=$? 90295367Sdes if [ "x$_expect_success" = "xyes" ] ; then 91295367Sdes if [ $_r -ne 0 ]; then 92295367Sdes fail "ssh cert connect $_ident failed" 93295367Sdes fi 94295367Sdes else 95295367Sdes if [ $_r -eq 0 ]; then 96295367Sdes fail "ssh cert connect $_ident succeeded unexpectedly" 97295367Sdes fi 98295367Sdes fi 99295367Sdes} 100295367Sdes 101295367Sdes# Basic connect and revocation tests. 102204861Sdesfor privsep in yes no ; do 103295367Sdes for ktype in $PLAIN_TYPES ; do 104204861Sdes verbose "$tid: host ${ktype} cert connect privsep $privsep" 105204861Sdes ( 106204861Sdes cat $OBJ/sshd_proxy_bak 107204861Sdes echo HostKey $OBJ/cert_host_key_${ktype} 108204861Sdes echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 109204861Sdes echo UsePrivilegeSeparation $privsep 110204861Sdes ) > $OBJ/sshd_proxy 111204861Sdes 112295367Sdes # test name expect success 113295367Sdes attempt_connect "$ktype basic connect" "yes" 114295367Sdes attempt_connect "$ktype empty KRL" "yes" \ 115295367Sdes -oRevokedHostKeys=$OBJ/host_krl_empty 116295367Sdes attempt_connect "$ktype KRL w/ plain key revoked" "no" \ 117295367Sdes -oRevokedHostKeys=$OBJ/host_krl_plain 118295367Sdes attempt_connect "$ktype KRL w/ cert revoked" "no" \ 119295367Sdes -oRevokedHostKeys=$OBJ/host_krl_cert 120295367Sdes attempt_connect "$ktype KRL w/ CA revoked" "no" \ 121295367Sdes -oRevokedHostKeys=$OBJ/host_krl_ca 122295367Sdes attempt_connect "$ktype empty plaintext revocation" "yes" \ 123295367Sdes -oRevokedHostKeys=$OBJ/host_revoked_empty 124295367Sdes attempt_connect "$ktype plain key plaintext revocation" "no" \ 125295367Sdes -oRevokedHostKeys=$OBJ/host_revoked_plain 126295367Sdes attempt_connect "$ktype cert plaintext revocation" "no" \ 127295367Sdes -oRevokedHostKeys=$OBJ/host_revoked_cert 128295367Sdes attempt_connect "$ktype CA plaintext revocation" "no" \ 129295367Sdes -oRevokedHostKeys=$OBJ/host_revoked_ca 130204861Sdes done 131204861Sdesdone 132204861Sdes 133204861Sdes# Revoked certificates with key present 134204861Sdes( 135255670Sdes printf '@cert-authority ' 136255670Sdes printf "$HOSTS " 137204861Sdes cat $OBJ/host_ca_key.pub 138295367Sdes for ktype in $PLAIN_TYPES ; do 139262566Sdes test -f "$OBJ/cert_host_key_${ktype}.pub" || fatal "no pubkey" 140262566Sdes printf "@revoked * `cat $OBJ/cert_host_key_${ktype}.pub`\n" 141262566Sdes done 142295367Sdes) > $OBJ/known_hosts-cert.orig 143295367Sdescp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 144204861Sdesfor privsep in yes no ; do 145295367Sdes for ktype in $PLAIN_TYPES ; do 146204861Sdes verbose "$tid: host ${ktype} revoked cert privsep $privsep" 147204861Sdes ( 148204861Sdes cat $OBJ/sshd_proxy_bak 149204861Sdes echo HostKey $OBJ/cert_host_key_${ktype} 150204861Sdes echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 151204861Sdes echo UsePrivilegeSeparation $privsep 152204861Sdes ) > $OBJ/sshd_proxy 153204861Sdes 154295367Sdes cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 155204861Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 156204861Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 157204861Sdes -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 158204861Sdes if [ $? -eq 0 ]; then 159204861Sdes fail "ssh cert connect succeeded unexpectedly" 160204861Sdes fi 161204861Sdes done 162204861Sdesdone 163204861Sdes 164204861Sdes# Revoked CA 165204861Sdes( 166255670Sdes printf '@cert-authority ' 167255670Sdes printf "$HOSTS " 168204861Sdes cat $OBJ/host_ca_key.pub 169255670Sdes printf '@revoked ' 170255670Sdes printf "* " 171204861Sdes cat $OBJ/host_ca_key.pub 172295367Sdes) > $OBJ/known_hosts-cert.orig 173295367Sdescp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 174295367Sdesfor ktype in $PLAIN_TYPES ; do 175204861Sdes verbose "$tid: host ${ktype} revoked cert" 176204861Sdes ( 177204861Sdes cat $OBJ/sshd_proxy_bak 178204861Sdes echo HostKey $OBJ/cert_host_key_${ktype} 179204861Sdes echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 180204861Sdes ) > $OBJ/sshd_proxy 181295367Sdes cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 182204861Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 183204861Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 184204861Sdes -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 185204861Sdes if [ $? -eq 0 ]; then 186204861Sdes fail "ssh cert connect succeeded unexpectedly" 187204861Sdes fi 188204861Sdesdone 189204861Sdes 190204861Sdes# Create a CA key and add it to known hosts 191204861Sdes( 192255670Sdes printf '@cert-authority ' 193255670Sdes printf "$HOSTS " 194204861Sdes cat $OBJ/host_ca_key.pub 195295367Sdes) > $OBJ/known_hosts-cert.orig 196295367Sdescp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 197204861Sdes 198204861Sdestest_one() { 199204861Sdes ident=$1 200204861Sdes result=$2 201204861Sdes sign_opts=$3 202204861Sdes 203295367Sdes for kt in rsa ed25519 ; do 204214979Sdes ${SSHKEYGEN} -q -s $OBJ/host_ca_key \ 205214979Sdes -I "regress host key for $USER" \ 206295367Sdes $sign_opts $OBJ/cert_host_key_${kt} || 207214979Sdes fail "couldn't sign cert_host_key_${kt}" 208214979Sdes ( 209214979Sdes cat $OBJ/sshd_proxy_bak 210214979Sdes echo HostKey $OBJ/cert_host_key_${kt} 211214979Sdes echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub 212214979Sdes ) > $OBJ/sshd_proxy 213214979Sdes 214295367Sdes cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 215214979Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 216214979Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 217214979Sdes -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 218214979Sdes rc=$? 219214979Sdes if [ "x$result" = "xsuccess" ] ; then 220214979Sdes if [ $rc -ne 0 ]; then 221214979Sdes fail "ssh cert connect $ident failed unexpectedly" 222214979Sdes fi 223214979Sdes else 224214979Sdes if [ $rc -eq 0 ]; then 225214979Sdes fail "ssh cert connect $ident succeeded unexpectedly" 226214979Sdes fi 227204861Sdes fi 228214979Sdes done 229204861Sdes} 230204861Sdes 231204861Sdestest_one "user-certificate" failure "-n $HOSTS" 232204861Sdestest_one "empty principals" success "-h" 233204861Sdestest_one "wrong principals" failure "-h -n foo" 234204861Sdestest_one "cert not yet valid" failure "-h -V20200101:20300101" 235204861Sdestest_one "cert expired" failure "-h -V19800101:19900101" 236204861Sdestest_one "cert valid interval" success "-h -V-1w:+2w" 237204861Sdestest_one "cert has constraints" failure "-h -Oforce-command=false" 238204861Sdes 239204861Sdes# Check downgrade of cert to raw key when no CA found 240295367Sdesfor ktype in $PLAIN_TYPES ; do 241295367Sdes rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key* 242295367Sdes verbose "$tid: host ${ktype} ${v} cert downgrade to raw key" 243295367Sdes # Generate and sign a host key 244295367Sdes ${SSHKEYGEN} -q -N '' -t ${ktype} \ 245295367Sdes -f $OBJ/cert_host_key_${ktype} || \ 246295367Sdes fail "ssh-keygen of cert_host_key_${ktype} failed" 247295367Sdes ${SSHKEYGEN} -t ${v} -h -q -s $OBJ/host_ca_key \ 248295367Sdes -I "regress host key for $USER" \ 249295367Sdes -n $HOSTS $OBJ/cert_host_key_${ktype} || 250295367Sdes fail "couldn't sign cert_host_key_${ktype}" 251295367Sdes ( 252295367Sdes printf "$HOSTS " 253295367Sdes cat $OBJ/cert_host_key_${ktype}.pub 254295367Sdes ) > $OBJ/known_hosts-cert 255295367Sdes ( 256295367Sdes cat $OBJ/sshd_proxy_bak 257295367Sdes echo HostKey $OBJ/cert_host_key_${ktype} 258295367Sdes echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 259295367Sdes ) > $OBJ/sshd_proxy 260295367Sdes 261295367Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 262295367Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 263295367Sdes -F $OBJ/ssh_proxy somehost true 264295367Sdes if [ $? -ne 0 ]; then 265295367Sdes fail "ssh cert connect failed" 266295367Sdes fi 267204861Sdesdone 268204861Sdes 269204861Sdes# Wrong certificate 270204861Sdes( 271255670Sdes printf '@cert-authority ' 272255670Sdes printf "$HOSTS " 273204861Sdes cat $OBJ/host_ca_key.pub 274295367Sdes) > $OBJ/known_hosts-cert.orig 275295367Sdescp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 276295367Sdesfor kt in $PLAIN_TYPES ; do 277295367Sdes rm -f $OBJ/cert_host_key* 278295367Sdes # Self-sign key 279295367Sdes ${SSHKEYGEN} -q -N '' -t ${kt} \ 280295367Sdes -f $OBJ/cert_host_key_${kt} || \ 281295367Sdes fail "ssh-keygen of cert_host_key_${kt} failed" 282295367Sdes ${SSHKEYGEN} -t ${v} -h -q -s $OBJ/cert_host_key_${kt} \ 283295367Sdes -I "regress host key for $USER" \ 284295367Sdes -n $HOSTS $OBJ/cert_host_key_${kt} || 285295367Sdes fail "couldn't sign cert_host_key_${kt}" 286295367Sdes verbose "$tid: host ${kt} connect wrong cert" 287295367Sdes ( 288295367Sdes cat $OBJ/sshd_proxy_bak 289295367Sdes echo HostKey $OBJ/cert_host_key_${kt} 290295367Sdes echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub 291295367Sdes ) > $OBJ/sshd_proxy 292295367Sdes 293295367Sdes cp $OBJ/known_hosts-cert.orig $OBJ/known_hosts-cert 294295367Sdes ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 295295367Sdes -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 296295367Sdes -F $OBJ/ssh_proxy -q somehost true >/dev/null 2>&1 297295367Sdes if [ $? -eq 0 ]; then 298295367Sdes fail "ssh cert connect $ident succeeded unexpectedly" 299295367Sdes fi 300204861Sdesdone 301204861Sdes 302295367Sdesrm -f $OBJ/known_hosts-cert* $OBJ/host_ca_key* $OBJ/cert_host_key* 303