regress/cert-hostkey.sh

   1 #       $OpenBSD: cert-hostkey.sh,v 1.3 2010/03/04 10:38:23 djm Exp $
   2 #       Placed in the Public Domain.
   3
   4 tid="certified host keys"
   5
   6 rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key*
   7 cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
   8
   9 HOSTS='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 $OBJ/host_ca_key ||\
  13         fail "ssh-keygen of host_ca_key failed"
  14 (
  15         echon '@cert-authority '
  16         echon "$HOSTS "
  17         cat $OBJ/host_ca_key.pub
  18 ) > $OBJ/known_hosts-cert
  19
  20 # Generate and sign host keys
  21 for ktype in rsa dsa ; do
  22         verbose "$tid: sign host ${ktype} cert"
  23         # Generate and sign a host key
  24         ${SSHKEYGEN} -q -N '' -t ${ktype} \
  25             -f $OBJ/cert_host_key_${ktype} || \
  26                 fail "ssh-keygen of cert_host_key_${ktype} failed"
  27         ${SSHKEYGEN} -h -q -s $OBJ/host_ca_key \
  28             -I "regress host key for $USER" \
  29             -n $HOSTS $OBJ/cert_host_key_${ktype} ||
  30                 fail "couldn't sign cert_host_key_${ktype}"
  31 done
  32
  33 # Basic connect tests
  34 for privsep in yes no ; do
  35         for ktype in rsa dsa ; do
  36                 verbose "$tid: host ${ktype} cert connect privsep $privsep"
  37                 (
  38                         cat $OBJ/sshd_proxy_bak
  39                         echo HostKey $OBJ/cert_host_key_${ktype}
  40                         echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
  41                         echo UsePrivilegeSeparation $privsep
  42                 ) > $OBJ/sshd_proxy
  43
  44                 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
  45                     -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
  46                         -F $OBJ/ssh_proxy somehost true
  47                 if [ $? -ne 0 ]; then
  48                         fail "ssh cert connect failed"
  49                 fi
  50         done
  51 done
  52
  53 # Revoked certificates with key present
  54 (
  55         echon '@cert-authority '
  56         echon "$HOSTS "
  57         cat $OBJ/host_ca_key.pub
  58         echon '@revoked '
  59         echon "* "
  60         cat $OBJ/cert_host_key_rsa.pub
  61         echon '@revoked '
  62         echon "* "
  63         cat $OBJ/cert_host_key_dsa.pub
  64 ) > $OBJ/known_hosts-cert
  65 for privsep in yes no ; do
  66         for ktype in rsa dsa ; do
  67                 verbose "$tid: host ${ktype} revoked cert privsep $privsep"
  68                 (
  69                         cat $OBJ/sshd_proxy_bak
  70                         echo HostKey $OBJ/cert_host_key_${ktype}
  71                         echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
  72                         echo UsePrivilegeSeparation $privsep
  73                 ) > $OBJ/sshd_proxy
  74
  75                 ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
  76                     -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
  77                         -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
  78                 if [ $? -eq 0 ]; then
  79                         fail "ssh cert connect succeeded unexpectedly"
  80                 fi
  81         done
  82 done
  83
  84 # Revoked CA
  85 (
  86         echon '@cert-authority '
  87         echon "$HOSTS "
  88         cat $OBJ/host_ca_key.pub
  89         echon '@revoked '
  90         echon "* "
  91         cat $OBJ/host_ca_key.pub
  92 ) > $OBJ/known_hosts-cert
  93 for ktype in rsa dsa ; do
  94         verbose "$tid: host ${ktype} revoked cert"
  95         (
  96                 cat $OBJ/sshd_proxy_bak
  97                 echo HostKey $OBJ/cert_host_key_${ktype}
  98                 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
  99         ) > $OBJ/sshd_proxy
 100         ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
 101             -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
 102                 -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
 103         if [ $? -eq 0 ]; then
 104                 fail "ssh cert connect succeeded unexpectedly"
 105         fi
 106 done
 107
 108 # Create a CA key and add it to known hosts
 109 (
 110         echon '@cert-authority '
 111         echon "$HOSTS "
 112         cat $OBJ/host_ca_key.pub
 113 ) > $OBJ/known_hosts-cert
 114
 115 test_one() {
 116         ident=$1
 117         result=$2
 118         sign_opts=$3
 119
 120         verbose "$tid: test host cert connect $ident expect $result"
 121
 122         ${SSHKEYGEN} -q -s $OBJ/host_ca_key -I "regress host key for $USER" \
 123             $sign_opts \
 124             $OBJ/cert_host_key_rsa ||
 125                 fail "couldn't sign cert_host_key_rsa"
 126         (
 127                 cat $OBJ/sshd_proxy_bak
 128                 echo HostKey $OBJ/cert_host_key_rsa
 129                 echo HostCertificate $OBJ/cert_host_key_rsa-cert.pub
 130         ) > $OBJ/sshd_proxy
 131
 132         ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
 133             -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
 134             -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
 135         rc=$?
 136         if [ "x$result" = "xsuccess" ] ; then
 137                 if [ $rc -ne 0 ]; then
 138                         fail "ssh cert connect $ident failed unexpectedly"
 139                 fi
 140         else
 141                 if [ $rc -eq 0 ]; then
 142                         fail "ssh cert connect $ident succeeded unexpectedly"
 143                 fi
 144         fi
 145 }
 146
 147 test_one "user-certificate"     failure "-n $HOSTS"
 148 test_one "empty principals"     success "-h"
 149 test_one "wrong principals"     failure "-h -n foo"
 150 test_one "cert not yet valid"   failure "-h -V20200101:20300101"
 151 test_one "cert expired"         failure "-h -V19800101:19900101"
 152 test_one "cert valid interval"  success "-h -V-1w:+2w"
 153 test_one "cert has constraints" failure "-h -Oforce-command=false"
 154
 155 # Check downgrade of cert to raw key when no CA found
 156 rm -f $OBJ/known_hosts-cert $OBJ/cert_host_key*
 157 for ktype in rsa dsa ; do
 158         verbose "$tid: host ${ktype} cert downgrade to raw key"
 159         # Generate and sign a host key
 160         ${SSHKEYGEN} -q -N '' -t ${ktype} \
 161             -f $OBJ/cert_host_key_${ktype} || \
 162                 fail "ssh-keygen of cert_host_key_${ktype} failed"
 163         ${SSHKEYGEN} -h -q -s $OBJ/host_ca_key -I "regress host key for $USER" \
 164             -n $HOSTS $OBJ/cert_host_key_${ktype} ||
 165                 fail "couldn't sign cert_host_key_${ktype}"
 166         (
 167                 echon "$HOSTS "
 168                 cat $OBJ/cert_host_key_${ktype}.pub
 169         ) > $OBJ/known_hosts-cert
 170         (
 171                 cat $OBJ/sshd_proxy_bak
 172                 echo HostKey $OBJ/cert_host_key_${ktype}
 173                 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
 174         ) > $OBJ/sshd_proxy
 175
 176         ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
 177             -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
 178                 -F $OBJ/ssh_proxy somehost true
 179         if [ $? -ne 0 ]; then
 180                 fail "ssh cert connect failed"
 181         fi
 182 done
 183
 184 # Wrong certificate
 185 (
 186         echon '@cert-authority '
 187         echon "$HOSTS "
 188         cat $OBJ/host_ca_key.pub
 189 ) > $OBJ/known_hosts-cert
 190 for ktype in rsa dsa ; do
 191         # Self-sign key
 192         ${SSHKEYGEN} -h -q -s $OBJ/cert_host_key_${ktype} \
 193             -I "regress host key for $USER" \
 194             -n $HOSTS $OBJ/cert_host_key_${ktype} ||
 195                 fail "couldn't sign cert_host_key_${ktype}"
 196         verbose "$tid: host ${ktype} connect wrong cert"
 197         (
 198                 cat $OBJ/sshd_proxy_bak
 199                 echo HostKey $OBJ/cert_host_key_${ktype}
 200                 echo HostCertificate $OBJ/cert_host_key_${ktype}-cert.pub
 201         ) > $OBJ/sshd_proxy
 202
 203         ${SSH} -2 -oUserKnownHostsFile=$OBJ/known_hosts-cert \
 204             -oGlobalKnownHostsFile=$OBJ/known_hosts-cert \
 205                 -F $OBJ/ssh_proxy -q somehost true >/dev/null 2>&1
 206         if [ $? -eq 0 ]; then
 207                 fail "ssh cert connect $ident succeeded unexpectedly"
 208         fi
 209 done
 210
 211 rm -f $OBJ/known_hosts-cert $OBJ/host_ca_key* $OBJ/cert_host_key*