cert-hostkey.sh revision 264377
1# $OpenBSD: cert-hostkey.sh,v 1.9 2014/01/26 10:22:10 djm Exp $ 2# Placed in the Public Domain. 3 4tid="certified host keys" 5 6rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key* 7cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak 8 9HOSTS='localhost-with-alias,127.0.0.1,::1' 10 11# Create a CA key and add it to known hosts 12${SSHKEYGEN} -q -N '' -t rsa -f $OBJ/host_ca_key ||\ 13 fail "ssh-keygen of host_ca_key failed" 14( 15 printf '@cert-authority ' 16 printf "$HOSTS " 17 cat $OBJ/host_ca_key.pub 18) > $OBJ/known_hosts-cert 19 20PLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/g;s/^ssh-//'` 21 22type_has_legacy() { 23 case $1 in 24 ed25519*|ecdsa*) return 1 ;; 25 esac 26 return 0 27} 28 29# Generate and sign host keys 30for ktype in $PLAIN_TYPES ; do 31 verbose "$tid: sign host ${ktype} cert" 32 # Generate and sign a host key 33 ${SSHKEYGEN} -q -N '' -t ${ktype} \ 34 -f $OBJ/cert_host_key_${ktype} || \ 35 fail "ssh-keygen of cert_host_key_${ktype} failed" 36 ${SSHKEYGEN} -h -q -s $OBJ/host_ca_key \ 37 -I "regress host key for $USER" \ 38 -n $HOSTS $OBJ/cert_host_key_${ktype} || 39 fail "couldn't sign cert_host_key_${ktype}" 40 type_has_legacy $ktype || continue 41 cp $OBJ/cert_host_key_${ktype} $OBJ/cert_host_key_${ktype}_v00 42 cp $OBJ/cert_host_key_${ktype}.pub $OBJ/cert_host_key_${ktype}_v00.pub 43 verbose "$tid: sign host ${ktype}_v00 cert" 44 ${SSHKEYGEN} -t v00 -h -q -s $OBJ/host_ca_key \ 45 -I "regress host key for $USER" \ 46 -n $HOSTS $OBJ/cert_host_key_${ktype}_v00 || 47 fail "couldn't sign cert_host_key_${ktype}_v00" 48done 49 50# Basic connect tests 51for privsep in yes no ; do 52 for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do 53 verbose "$tid: host ${ktype} cert connect privsep $privsep" 54 ( 55 cat $OBJ/sshd_proxy_bak 56 echo HostKey $OBJ/cert_host_key_${ktype} 57 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 58 echo UsePrivilegeSeparation $privsep 59 ) > $OBJ/sshd_proxy 60 61 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 62 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 63 -F $OBJ/ssh_proxy somehost true 64 if [ $? -ne 0 ]; then 65 fail "ssh cert connect failed" 66 fi 67 done 68done 69 70# Revoked certificates with key present 71( 72 printf '@cert-authority ' 73 printf "$HOSTS " 74 cat $OBJ/host_ca_key.pub 75 for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do 76 test -f "$OBJ/cert_host_key_${ktype}.pub" || fatal "no pubkey" 77 printf "@revoked * `cat $OBJ/cert_host_key_${ktype}.pub`\n" 78 done 79) > $OBJ/known_hosts-cert 80for privsep in yes no ; do 81 for ktype in $PLAIN_TYPES rsa_v00 dsa_v00; do 82 verbose "$tid: host ${ktype} revoked cert privsep $privsep" 83 ( 84 cat $OBJ/sshd_proxy_bak 85 echo HostKey $OBJ/cert_host_key_${ktype} 86 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 87 echo UsePrivilegeSeparation $privsep 88 ) > $OBJ/sshd_proxy 89 90 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 91 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 92 -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 93 if [ $? -eq 0 ]; then 94 fail "ssh cert connect succeeded unexpectedly" 95 fi 96 done 97done 98 99# Revoked CA 100( 101 printf '@cert-authority ' 102 printf "$HOSTS " 103 cat $OBJ/host_ca_key.pub 104 printf '@revoked ' 105 printf "* " 106 cat $OBJ/host_ca_key.pub 107) > $OBJ/known_hosts-cert 108for ktype in $PLAIN_TYPES rsa_v00 dsa_v00 ; do 109 verbose "$tid: host ${ktype} revoked cert" 110 ( 111 cat $OBJ/sshd_proxy_bak 112 echo HostKey $OBJ/cert_host_key_${ktype} 113 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 114 ) > $OBJ/sshd_proxy 115 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 116 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 117 -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 118 if [ $? -eq 0 ]; then 119 fail "ssh cert connect succeeded unexpectedly" 120 fi 121done 122 123# Create a CA key and add it to known hosts 124( 125 printf '@cert-authority ' 126 printf "$HOSTS " 127 cat $OBJ/host_ca_key.pub 128) > $OBJ/known_hosts-cert 129 130test_one() { 131 ident=$1 132 result=$2 133 sign_opts=$3 134 135 for kt in rsa rsa_v00 ; do 136 case $kt in 137 *_v00) args="-t v00" ;; 138 *) args="" ;; 139 esac 140 141 verbose "$tid: host cert connect $ident $kt expect $result" 142 ${SSHKEYGEN} -q -s $OBJ/host_ca_key \ 143 -I "regress host key for $USER" \ 144 $sign_opts $args \ 145 $OBJ/cert_host_key_${kt} || 146 fail "couldn't sign cert_host_key_${kt}" 147 ( 148 cat $OBJ/sshd_proxy_bak 149 echo HostKey $OBJ/cert_host_key_${kt} 150 echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub 151 ) > $OBJ/sshd_proxy 152 153 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 154 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 155 -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1 156 rc=$? 157 if [ "x$result" = "xsuccess" ] ; then 158 if [ $rc -ne 0 ]; then 159 fail "ssh cert connect $ident failed unexpectedly" 160 fi 161 else 162 if [ $rc -eq 0 ]; then 163 fail "ssh cert connect $ident succeeded unexpectedly" 164 fi 165 fi 166 done 167} 168 169test_one "user-certificate" failure "-n $HOSTS" 170test_one "empty principals" success "-h" 171test_one "wrong principals" failure "-h -n foo" 172test_one "cert not yet valid" failure "-h -V20200101:20300101" 173test_one "cert expired" failure "-h -V19800101:19900101" 174test_one "cert valid interval" success "-h -V-1w:+2w" 175test_one "cert has constraints" failure "-h -Oforce-command=false" 176 177# Check downgrade of cert to raw key when no CA found 178for v in v01 v00 ; do 179 for ktype in $PLAIN_TYPES ; do 180 type_has_legacy $ktype || continue 181 rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key* 182 verbose "$tid: host ${ktype} ${v} cert downgrade to raw key" 183 # Generate and sign a host key 184 ${SSHKEYGEN} -q -N '' -t ${ktype} \ 185 -f $OBJ/cert_host_key_${ktype} || \ 186 fail "ssh-keygen of cert_host_key_${ktype} failed" 187 ${SSHKEYGEN} -t ${v} -h -q -s $OBJ/host_ca_key \ 188 -I "regress host key for $USER" \ 189 -n $HOSTS $OBJ/cert_host_key_${ktype} || 190 fail "couldn't sign cert_host_key_${ktype}" 191 ( 192 printf "$HOSTS " 193 cat $OBJ/cert_host_key_${ktype}.pub 194 ) > $OBJ/known_hosts-cert 195 ( 196 cat $OBJ/sshd_proxy_bak 197 echo HostKey $OBJ/cert_host_key_${ktype} 198 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub 199 ) > $OBJ/sshd_proxy 200 201 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 202 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 203 -F $OBJ/ssh_proxy somehost true 204 if [ $? -ne 0 ]; then 205 fail "ssh cert connect failed" 206 fi 207 done 208done 209 210# Wrong certificate 211( 212 printf '@cert-authority ' 213 printf "$HOSTS " 214 cat $OBJ/host_ca_key.pub 215) > $OBJ/known_hosts-cert 216for v in v01 v00 ; do 217 for kt in $PLAIN_TYPES ; do 218 type_has_legacy $kt || continue 219 rm -f $OBJ/cert_host_key* 220 # Self-sign key 221 ${SSHKEYGEN} -q -N '' -t ${kt} \ 222 -f $OBJ/cert_host_key_${kt} || \ 223 fail "ssh-keygen of cert_host_key_${kt} failed" 224 ${SSHKEYGEN} -t ${v} -h -q -s $OBJ/cert_host_key_${kt} \ 225 -I "regress host key for $USER" \ 226 -n $HOSTS $OBJ/cert_host_key_${kt} || 227 fail "couldn't sign cert_host_key_${kt}" 228 verbose "$tid: host ${kt} connect wrong cert" 229 ( 230 cat $OBJ/sshd_proxy_bak 231 echo HostKey $OBJ/cert_host_key_${kt} 232 echo HostCertificate $OBJ/cert_host_key_${kt}-cert.pub 233 ) > $OBJ/sshd_proxy 234 235 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \ 236 -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \ 237 -F $OBJ/ssh_proxy -q somehost true >/dev/null 2>&1 238 if [ $? -eq 0 ]; then 239 fail "ssh cert connect $ident succeeded unexpectedly" 240 fi 241 done 242done 243 244rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key* 245