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-rw-r--r--regress/cert-userkey.sh391
1 files changed, 391 insertions, 0 deletions
diff --git a/regress/cert-userkey.sh b/regress/cert-userkey.sh
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+# $OpenBSD: cert-userkey.sh,v 1.19 2018/03/12 00:54:04 djm Exp $
+# Placed in the Public Domain.
+
+tid="certified user keys"
+
+rm -f $OBJ/authorized_keys_$USER $OBJ/user_ca_key* $OBJ/cert_user_key*
+cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
+cp $OBJ/ssh_proxy $OBJ/ssh_proxy_bak
+
+PLAIN_TYPES=`$SSH -Q key-plain | sed 's/^ssh-dss/ssh-dsa/;s/^ssh-//'`
+EXTRA_TYPES=""
+
+if echo "$PLAIN_TYPES" | grep '^rsa$' >/dev/null 2>&1 ; then
+ PLAIN_TYPES="$PLAIN_TYPES rsa-sha2-256 rsa-sha2-512"
+fi
+
+kname() {
+ case $ktype in
+ rsa-sha2-*) n="$ktype" ;;
+ # subshell because some seds will add a newline
+ *) n=$(echo $1 | sed 's/^dsa/ssh-dss/;s/^rsa/ssh-rsa/;s/^ed/ssh-ed/') ;;
+ esac
+ echo "$n*,ssh-rsa*,ssh-ed25519*"
+}
+
+# Create a CA key
+${SSHKEYGEN} -q -N '' -t rsa -f $OBJ/user_ca_key ||\
+ fail "ssh-keygen of user_ca_key failed"
+
+# Generate and sign user keys
+for ktype in $PLAIN_TYPES $EXTRA_TYPES ; do
+ verbose "$tid: sign user ${ktype} cert"
+ ${SSHKEYGEN} -q -N '' -t ${ktype} \
+ -f $OBJ/cert_user_key_${ktype} || \
+ fatal "ssh-keygen of cert_user_key_${ktype} failed"
+ # Generate RSA/SHA2 certs for rsa-sha2* keys.
+ case $ktype in
+ rsa-sha2-*) tflag="-t $ktype" ;;
+ *) tflag="" ;;
+ esac
+ ${SSHKEYGEN} -q -s $OBJ/user_ca_key -z $$ \
+ -I "regress user key for $USER" \
+ -n ${USER},mekmitasdigoat $tflag $OBJ/cert_user_key_${ktype} || \
+ fatal "couldn't sign cert_user_key_${ktype}"
+done
+
+# Test explicitly-specified principals
+for ktype in $EXTRA_TYPES $PLAIN_TYPES ; do
+ t=$(kname $ktype)
+ for privsep in yes no ; do
+ _prefix="${ktype} privsep $privsep"
+
+ # Setup for AuthorizedPrincipalsFile
+ rm -f $OBJ/authorized_keys_$USER
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "UsePrivilegeSeparation $privsep"
+ echo "AuthorizedPrincipalsFile " \
+ "$OBJ/authorized_principals_%u"
+ echo "TrustedUserCAKeys $OBJ/user_ca_key.pub"
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ ) > $OBJ/sshd_proxy
+ (
+ cat $OBJ/ssh_proxy_bak
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ ) > $OBJ/ssh_proxy
+
+ # Missing authorized_principals
+ verbose "$tid: ${_prefix} missing authorized_principals"
+ rm -f $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+ # Empty authorized_principals
+ verbose "$tid: ${_prefix} empty authorized_principals"
+ echo > $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+ # Wrong authorized_principals
+ verbose "$tid: ${_prefix} wrong authorized_principals"
+ echo gregorsamsa > $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+ # Correct authorized_principals
+ verbose "$tid: ${_prefix} correct authorized_principals"
+ echo mekmitasdigoat > $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+
+ # authorized_principals with bad key option
+ verbose "$tid: ${_prefix} authorized_principals bad key opt"
+ echo 'blah mekmitasdigoat' > $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+ # authorized_principals with command=false
+ verbose "$tid: ${_prefix} authorized_principals command=false"
+ echo 'command="false" mekmitasdigoat' > \
+ $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+
+ # authorized_principals with command=true
+ verbose "$tid: ${_prefix} authorized_principals command=true"
+ echo 'command="true" mekmitasdigoat' > \
+ $OBJ/authorized_principals_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost false >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+
+ # Setup for principals= key option
+ rm -f $OBJ/authorized_principals_$USER
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "UsePrivilegeSeparation $privsep"
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ ) > $OBJ/sshd_proxy
+ (
+ cat $OBJ/ssh_proxy_bak
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ ) > $OBJ/ssh_proxy
+
+ # Wrong principals list
+ verbose "$tid: ${_prefix} wrong principals key option"
+ (
+ printf 'cert-authority,principals="gregorsamsa" '
+ cat $OBJ/user_ca_key.pub
+ ) > $OBJ/authorized_keys_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpectedly"
+ fi
+
+ # Correct principals list
+ verbose "$tid: ${_prefix} correct principals key option"
+ (
+ printf 'cert-authority,principals="mekmitasdigoat" '
+ cat $OBJ/user_ca_key.pub
+ ) > $OBJ/authorized_keys_$USER
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+ done
+done
+
+basic_tests() {
+ auth=$1
+ if test "x$auth" = "xauthorized_keys" ; then
+ # Add CA to authorized_keys
+ (
+ printf 'cert-authority '
+ cat $OBJ/user_ca_key.pub
+ ) > $OBJ/authorized_keys_$USER
+ else
+ echo > $OBJ/authorized_keys_$USER
+ extra_sshd="TrustedUserCAKeys $OBJ/user_ca_key.pub"
+ fi
+
+ for ktype in $PLAIN_TYPES ; do
+ t=$(kname $ktype)
+ for privsep in yes no ; do
+ _prefix="${ktype} privsep $privsep $auth"
+ # Simple connect
+ verbose "$tid: ${_prefix} connect"
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "UsePrivilegeSeparation $privsep"
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ echo "$extra_sshd"
+ ) > $OBJ/sshd_proxy
+ (
+ cat $OBJ/ssh_proxy_bak
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ ) > $OBJ/ssh_proxy
+
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+
+ # Revoked keys
+ verbose "$tid: ${_prefix} revoked key"
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "UsePrivilegeSeparation $privsep"
+ echo "RevokedKeys $OBJ/cert_user_key_revoked"
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ echo "$extra_sshd"
+ ) > $OBJ/sshd_proxy
+ cp $OBJ/cert_user_key_${ktype}.pub \
+ $OBJ/cert_user_key_revoked
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpecedly"
+ fi
+ verbose "$tid: ${_prefix} revoked via KRL"
+ rm $OBJ/cert_user_key_revoked
+ ${SSHKEYGEN} -kqf $OBJ/cert_user_key_revoked \
+ $OBJ/cert_user_key_${ktype}.pub
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpecedly"
+ fi
+ verbose "$tid: ${_prefix} empty KRL"
+ ${SSHKEYGEN} -kqf $OBJ/cert_user_key_revoked
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ fail "ssh cert connect failed"
+ fi
+ done
+
+ # Revoked CA
+ verbose "$tid: ${ktype} $auth revoked CA key"
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "RevokedKeys $OBJ/user_ca_key.pub"
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ echo "$extra_sshd"
+ ) > $OBJ/sshd_proxy
+ ${SSH} -i $OBJ/cert_user_key_${ktype} -F $OBJ/ssh_proxy \
+ somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect succeeded unexpecedly"
+ fi
+ done
+
+ verbose "$tid: $auth CA does not authenticate"
+ (
+ cat $OBJ/sshd_proxy_bak
+ echo "PubkeyAcceptedKeyTypes ${t}"
+ echo "$extra_sshd"
+ ) > $OBJ/sshd_proxy
+ verbose "$tid: ensure CA key does not authenticate user"
+ ${SSH} -i $OBJ/user_ca_key \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect with CA key succeeded unexpectedly"
+ fi
+}
+
+basic_tests authorized_keys
+basic_tests TrustedUserCAKeys
+
+test_one() {
+ ident=$1
+ result=$2
+ sign_opts=$3
+ auth_choice=$4
+ auth_opt=$5
+
+ if test "x$auth_choice" = "x" ; then
+ auth_choice="authorized_keys TrustedUserCAKeys"
+ fi
+
+ for auth in $auth_choice ; do
+ for ktype in rsa ed25519 ; do
+ cat $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy
+ if test "x$auth" = "xauthorized_keys" ; then
+ # Add CA to authorized_keys
+ (
+ printf "cert-authority${auth_opt} "
+ cat $OBJ/user_ca_key.pub
+ ) > $OBJ/authorized_keys_$USER
+ else
+ echo > $OBJ/authorized_keys_$USER
+ echo "TrustedUserCAKeys $OBJ/user_ca_key.pub" \
+ >> $OBJ/sshd_proxy
+ echo "PubkeyAcceptedKeyTypes ${t}*" \
+ >> $OBJ/sshd_proxy
+ if test "x$auth_opt" != "x" ; then
+ echo $auth_opt >> $OBJ/sshd_proxy
+ fi
+ fi
+
+ verbose "$tid: $ident auth $auth expect $result $ktype"
+ ${SSHKEYGEN} -q -s $OBJ/user_ca_key \
+ -I "regress user key for $USER" \
+ $sign_opts $OBJ/cert_user_key_${ktype} ||
+ fail "couldn't sign cert_user_key_${ktype}"
+
+ ${SSH} -i $OBJ/cert_user_key_${ktype} \
+ -F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
+ rc=$?
+ if [ "x$result" = "xsuccess" ] ; then
+ if [ $rc -ne 0 ]; then
+ fail "$ident failed unexpectedly"
+ fi
+ else
+ if [ $rc -eq 0 ]; then
+ fail "$ident succeeded unexpectedly"
+ fi
+ fi
+ done
+ done
+}
+
+test_one "correct principal" success "-n ${USER}"
+test_one "host-certificate" failure "-n ${USER} -h"
+test_one "wrong principals" failure "-n foo"
+test_one "cert not yet valid" failure "-n ${USER} -V20200101:20300101"
+test_one "cert expired" failure "-n ${USER} -V19800101:19900101"
+test_one "cert valid interval" success "-n ${USER} -V-1w:+2w"
+test_one "wrong source-address" failure "-n ${USER} -Osource-address=10.0.0.0/8"
+test_one "force-command" failure "-n ${USER} -Oforce-command=false"
+
+# Behaviour is different here: TrustedUserCAKeys doesn't allow empty principals
+test_one "empty principals" success "" authorized_keys
+test_one "empty principals" failure "" TrustedUserCAKeys
+
+# Check explicitly-specified principals: an empty principals list in the cert
+# should always be refused.
+
+# AuthorizedPrincipalsFile
+rm -f $OBJ/authorized_keys_$USER
+echo mekmitasdigoat > $OBJ/authorized_principals_$USER
+test_one "AuthorizedPrincipalsFile principals" success "-n mekmitasdigoat" \
+ TrustedUserCAKeys "AuthorizedPrincipalsFile $OBJ/authorized_principals_%u"
+test_one "AuthorizedPrincipalsFile no principals" failure "" \
+ TrustedUserCAKeys "AuthorizedPrincipalsFile $OBJ/authorized_principals_%u"
+
+# principals= key option
+rm -f $OBJ/authorized_principals_$USER
+test_one "principals key option principals" success "-n mekmitasdigoat" \
+ authorized_keys ',principals="mekmitasdigoat"'
+test_one "principals key option no principals" failure "" \
+ authorized_keys ',principals="mekmitasdigoat"'
+
+# command= options vs. force-command in key
+test_one "force-command match true" success \
+ "-n ${USER} -Oforce-command=true" \
+ authorized_keys ',command="true"'
+test_one "force-command match true" failure \
+ "-n ${USER} -Oforce-command=false" \
+ authorized_keys ',command="false"'
+test_one "force-command mismatch 1" failure \
+ "-n ${USER} -Oforce-command=false" \
+ authorized_keys ',command="true"'
+test_one "force-command mismatch 2" failure \
+ "-n ${USER} -Oforce-command=true" \
+ authorized_keys ',command="false"'
+
+# Wrong certificate
+cat $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy
+for ktype in $PLAIN_TYPES ; do
+ t=$(kname $ktype)
+ # Self-sign
+ ${SSHKEYGEN} -q -s $OBJ/cert_user_key_${ktype} -I \
+ "regress user key for $USER" \
+ -n $USER $OBJ/cert_user_key_${ktype} ||
+ fatal "couldn't sign cert_user_key_${ktype}"
+ verbose "$tid: user ${ktype} connect wrong cert"
+ ${SSH} -i $OBJ/cert_user_key_${ktype} -F $OBJ/ssh_proxy \
+ somehost true >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ fail "ssh cert connect $ident succeeded unexpectedly"
+ fi
+done
+
+rm -f $OBJ/authorized_keys_$USER $OBJ/user_ca_key* $OBJ/cert_user_key*
+rm -f $OBJ/authorized_principals_$USER
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 06:20:18 +0000