let principals-command.sh work for noexec /var/run
This commit is contained in:
Damien Miller
parent
2651e34cd1
commit
55b263fb7c
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@ -14,15 +14,15 @@ fi
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# Establish a AuthorizedPrincipalsCommand in /var/run where it will have
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# acceptable directory permissions.
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PRINCIPALS_COMMAND="/var/run/principals_command_${LOGNAME}"
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cat << _EOF | $SUDO sh -c "cat > '$PRINCIPALS_COMMAND'"
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PRINCIPALS_CMD="/var/run/principals_command_${LOGNAME}"
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cat << _EOF | $SUDO sh -c "cat > '$PRINCIPALS_CMD'"
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#!/bin/sh
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test "x\$1" != "x${LOGNAME}" && exit 1
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test -f "$OBJ/authorized_principals_${LOGNAME}" &&
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exec cat "$OBJ/authorized_principals_${LOGNAME}"
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_EOF
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test $? -eq 0 || fatal "couldn't prepare principals command"
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$SUDO chmod 0755 "$PRINCIPALS_COMMAND"
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$SUDO chmod 0755 "$PRINCIPALS_CMD"
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# Create a CA key and a user certificate.
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${SSHKEYGEN} -q -N '' -t ed25519 -f $OBJ/user_ca_key || \
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@ -33,109 +33,113 @@ ${SSHKEYGEN} -q -s $OBJ/user_ca_key -I "regress user key for $USER" \
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-z $$ -n ${USER},mekmitasdigoat $OBJ/cert_user_key || \
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fatal "couldn't sign cert_user_key"
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# Test explicitly-specified principals
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for privsep in yes no ; do
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_prefix="privsep $privsep"
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if [ -x $PRINCIPALS_CMD ]; then
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# Test explicitly-specified principals
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for privsep in yes no ; do
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_prefix="privsep $privsep"
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# Setup for AuthorizedPrincipalsCommand
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rm -f $OBJ/authorized_keys_$USER
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(
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cat $OBJ/sshd_proxy_bak
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echo "UsePrivilegeSeparation $privsep"
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echo "AuthorizedKeysFile none"
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echo "AuthorizedPrincipalsCommand $PRINCIPALS_COMMAND %u"
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echo "AuthorizedPrincipalsCommandUser ${LOGNAME}"
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echo "TrustedUserCAKeys $OBJ/user_ca_key.pub"
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) > $OBJ/sshd_proxy
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# Setup for AuthorizedPrincipalsCommand
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rm -f $OBJ/authorized_keys_$USER
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(
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cat $OBJ/sshd_proxy_bak
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echo "UsePrivilegeSeparation $privsep"
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echo "AuthorizedKeysFile none"
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echo "AuthorizedPrincipalsCommand $PRINCIPALS_CMD %u"
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echo "AuthorizedPrincipalsCommandUser ${LOGNAME}"
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echo "TrustedUserCAKeys $OBJ/user_ca_key.pub"
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) > $OBJ/sshd_proxy
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# XXX test missing command
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# XXX test failing command
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# XXX test missing command
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# XXX test failing command
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# Empty authorized_principals
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verbose "$tid: ${_prefix} empty authorized_principals"
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echo > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Empty authorized_principals
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verbose "$tid: ${_prefix} empty authorized_principals"
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echo > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Wrong authorized_principals
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verbose "$tid: ${_prefix} wrong authorized_principals"
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echo gregorsamsa > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Wrong authorized_principals
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verbose "$tid: ${_prefix} wrong authorized_principals"
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echo gregorsamsa > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Correct authorized_principals
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verbose "$tid: ${_prefix} correct authorized_principals"
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echo mekmitasdigoat > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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# Correct authorized_principals
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verbose "$tid: ${_prefix} correct authorized_principals"
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echo mekmitasdigoat > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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# authorized_principals with bad key option
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verbose "$tid: ${_prefix} authorized_principals bad key opt"
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echo 'blah mekmitasdigoat' > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# authorized_principals with bad key option
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verbose "$tid: ${_prefix} authorized_principals bad key opt"
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echo 'blah mekmitasdigoat' > $OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# authorized_principals with command=false
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verbose "$tid: ${_prefix} authorized_principals command=false"
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echo 'command="false" mekmitasdigoat' > \
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$OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# authorized_principals with command=false
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verbose "$tid: ${_prefix} authorized_principals command=false"
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echo 'command="false" mekmitasdigoat' > \
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$OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# authorized_principals with command=true
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verbose "$tid: ${_prefix} authorized_principals command=true"
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echo 'command="true" mekmitasdigoat' > \
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$OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost false >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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# authorized_principals with command=true
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verbose "$tid: ${_prefix} authorized_principals command=true"
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echo 'command="true" mekmitasdigoat' > \
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$OBJ/authorized_principals_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost false >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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# Setup for principals= key option
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rm -f $OBJ/authorized_principals_$USER
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(
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cat $OBJ/sshd_proxy_bak
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echo "UsePrivilegeSeparation $privsep"
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) > $OBJ/sshd_proxy
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# Setup for principals= key option
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rm -f $OBJ/authorized_principals_$USER
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(
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cat $OBJ/sshd_proxy_bak
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echo "UsePrivilegeSeparation $privsep"
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) > $OBJ/sshd_proxy
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# Wrong principals list
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verbose "$tid: ${_prefix} wrong principals key option"
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(
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printf 'cert-authority,principals="gregorsamsa" '
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cat $OBJ/user_ca_key.pub
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) > $OBJ/authorized_keys_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Wrong principals list
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verbose "$tid: ${_prefix} wrong principals key option"
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(
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printf 'cert-authority,principals="gregorsamsa" '
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cat $OBJ/user_ca_key.pub
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) > $OBJ/authorized_keys_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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fail "ssh cert connect succeeded unexpectedly"
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fi
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# Correct principals list
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verbose "$tid: ${_prefix} correct principals key option"
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(
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printf 'cert-authority,principals="mekmitasdigoat" '
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cat $OBJ/user_ca_key.pub
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) > $OBJ/authorized_keys_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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done
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# Correct principals list
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verbose "$tid: ${_prefix} correct principals key option"
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(
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printf 'cert-authority,principals="mekmitasdigoat" '
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cat $OBJ/user_ca_key.pub
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) > $OBJ/authorized_keys_$USER
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${SSH} -2i $OBJ/cert_user_key \
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-F $OBJ/ssh_proxy somehost true >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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fail "ssh cert connect failed"
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fi
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done
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else
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echo "SKIPPED: $PRINCIPALS_COMMAND not executable " \
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"(/var/run mounted noexec?)"
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fi
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