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# $OpenBSD: cert-file.sh,v 1.4 2016/12/16 02:48:55 djm Exp $
# Placed in the Public Domain.
tid="ssh with certificates"
rm -f $OBJ/user_ca_key* $OBJ/user_key*
rm -f $OBJ/cert_user_key*
# Create a CA key
${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/user_ca_key1 ||\
fatal "ssh-keygen failed"
${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/user_ca_key2 ||\
fatal "ssh-keygen failed"
# Make some keys and certificates.
${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/user_key1 || \
fatal "ssh-keygen failed"
${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/user_key2 || \
fatal "ssh-keygen failed"
# Move the certificate to a different address to better control
# when it is offered.
${SSHKEYGEN} -q -s $OBJ/user_ca_key1 -I "regress user key for $USER" \
-z $$ -n ${USER} $OBJ/user_key1 ||
fail "couldn't sign user_key1 with user_ca_key1"
mv $OBJ/user_key1-cert.pub $OBJ/cert_user_key1_1.pub
${SSHKEYGEN} -q -s $OBJ/user_ca_key2 -I "regress user key for $USER" \
-z $$ -n ${USER} $OBJ/user_key1 ||
fail "couldn't sign user_key1 with user_ca_key2"
mv $OBJ/user_key1-cert.pub $OBJ/cert_user_key1_2.pub
trace 'try with identity files'
opts="-F $OBJ/ssh_proxy -oIdentitiesOnly=yes"
opts2="$opts -i $OBJ/user_key1 -i $OBJ/user_key2"
echo "cert-authority $(cat $OBJ/user_ca_key1.pub)" > $OBJ/authorized_keys_$USER
for p in ${SSH_PROTOCOLS}; do
# Just keys should fail
${SSH} $opts2 somehost exit 5$p
r=$?
if [ $r -eq 5$p ]; then
fail "ssh succeeded with no certs in protocol $p"
fi
# Keys with untrusted cert should fail.
opts3="$opts2 -oCertificateFile=$OBJ/cert_user_key1_2.pub"
${SSH} $opts3 somehost exit 5$p
r=$?
if [ $r -eq 5$p ]; then
fail "ssh succeeded with bad cert in protocol $p"
fi
# Good cert with bad key should fail.
opts3="$opts -i $OBJ/user_key2"
opts3="$opts3 -oCertificateFile=$OBJ/cert_user_key1_1.pub"
${SSH} $opts3 somehost exit 5$p
r=$?
if [ $r -eq 5$p ]; then
fail "ssh succeeded with no matching key in protocol $p"
fi
# Keys with one trusted cert, should succeed.
opts3="$opts2 -oCertificateFile=$OBJ/cert_user_key1_1.pub"
${SSH} $opts3 somehost exit 5$p
r=$?
if [ $r -ne 5$p ]; then
fail "ssh failed with trusted cert and key in protocol $p"
fi
# Multiple certs and keys, with one trusted cert, should succeed.
opts3="$opts2 -oCertificateFile=$OBJ/cert_user_key1_2.pub"
opts3="$opts3 -oCertificateFile=$OBJ/cert_user_key1_1.pub"
${SSH} $opts3 somehost exit 5$p
r=$?
if [ $r -ne 5$p ]; then
fail "ssh failed with multiple certs in protocol $p"
fi
#Keys with trusted certificate specified in config options, should succeed.
opts3="$opts2 -oCertificateFile=$OBJ/cert_user_key1_1.pub"
${SSH} $opts3 somehost exit 5$p
r=$?
if [ $r -ne 5$p ]; then
fail "ssh failed with trusted cert in config in protocol $p"
fi
done
#next, using an agent in combination with the keys
SSH_AUTH_SOCK=/nonexistent ${SSHADD} -l > /dev/null 2>&1
if [ $? -ne 2 ]; then
fatal "ssh-add -l did not fail with exit code 2"
fi
trace "start agent"
eval `${SSHAGENT} -s` > /dev/null
r=$?
if [ $r -ne 0 ]; then
fatal "could not start ssh-agent: exit code $r"
fi
# add private keys to agent
${SSHADD} -k $OBJ/user_key2 > /dev/null 2>&1
if [ $? -ne 0 ]; then
fatal "ssh-add did not succeed with exit code 0"
fi
${SSHADD} -k $OBJ/user_key1 > /dev/null 2>&1
if [ $? -ne 0 ]; then
fatal "ssh-add did not succeed with exit code 0"
fi
# try ssh with the agent and certificates
# note: ssh agent only uses certificates in protocol 2
opts="-F $OBJ/ssh_proxy"
# with no certificates, shoud fail
${SSH} -2 $opts somehost exit 52
if [ $? -eq 52 ]; then
fail "ssh connect with agent in protocol 2 succeeded with no cert"
fi
#with an untrusted certificate, should fail
opts="$opts -oCertificateFile=$OBJ/cert_user_key1_2.pub"
${SSH} -2 $opts somehost exit 52
if [ $? -eq 52 ]; then
fail "ssh connect with agent in protocol 2 succeeded with bad cert"
fi
#with an additional trusted certificate, should succeed
opts="$opts -oCertificateFile=$OBJ/cert_user_key1_1.pub"
${SSH} -2 $opts somehost exit 52
if [ $? -ne 52 ]; then
fail "ssh connect with agent in protocol 2 failed with good cert"
fi
trace "kill agent"
${SSHAGENT} -k > /dev/null
#cleanup
rm -f $OBJ/user_ca_key* $OBJ/user_key*
rm -f $OBJ/cert_user_key*
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