mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-30 14:37:19 +02:00
Use SELinux "db_table: { truncate }" to check if permission is granted to TRUNCATE. Update example SELinux policy to grant needed permission for TRUNCATE. Add new regression test to demonstrate a positive and negative cases. Test will only be run if the loaded SELinux policy has the "db_table: { truncate }" permission. Makes use of recent commit which added object TRUNCATE hook. Patch by Yuli Khodorkovskiy with minor editorialization by me. Not back-patched because the object TRUNCATE hook was not. Author: Yuli Khodorkovskiy Reviewed-by: Joe Conway Discussion: https://postgr.es/m/CAFL5wJcomybj1Xdw7qWmPJRpGuFukKgNrDb6uVBaCMgYS9dkaA%40mail.gmail.com
307 lines
10 KiB
Bash
Executable File
307 lines
10 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# Run the sepgsql regression tests, after making a lot of environmental checks
|
|
# to try to ensure that the SELinux environment is set up appropriately and
|
|
# the database is configured correctly.
|
|
#
|
|
# Note that this must be run against an installed Postgres database.
|
|
# There's no equivalent of "make check", and that wouldn't be terribly useful
|
|
# since much of the value is in checking that you installed sepgsql into
|
|
# your database correctly.
|
|
#
|
|
# This must be run in the contrib/sepgsql directory of a Postgres build tree.
|
|
#
|
|
|
|
PG_BINDIR=`pg_config --bindir`
|
|
|
|
# we must move to contrib/sepgsql directory to run pg_regress correctly
|
|
cd `dirname $0`
|
|
|
|
echo
|
|
echo "============== checking selinux environment =============="
|
|
|
|
# matchpathcon must be present to assess whether the installation environment
|
|
# is OK.
|
|
echo -n "checking for matchpathcon ... "
|
|
if ! matchpathcon -n . >/dev/null 2>&1; then
|
|
echo "not found"
|
|
echo ""
|
|
echo "The matchpathcon command must be available."
|
|
echo "Please install it or update your PATH to include it"
|
|
echo "(it is typically in '/usr/sbin', which might not be in your PATH)."
|
|
echo "matchpathcon is typically included in the libselinux-utils package."
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# runcon must be present to launch psql using the correct environment
|
|
echo -n "checking for runcon ... "
|
|
if ! runcon --help >/dev/null 2>&1; then
|
|
echo "not found"
|
|
echo ""
|
|
echo "The runcon command must be available."
|
|
echo "runcon is typically included in the coreutils package."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# check sestatus too, since that lives in yet another package
|
|
echo -n "checking for sestatus ... "
|
|
if ! sestatus >/dev/null 2>&1; then
|
|
echo "not found"
|
|
echo ""
|
|
echo "The sestatus command must be available."
|
|
echo "sestatus is typically included in the policycoreutils package."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# check that the user is running in the unconfined_t domain
|
|
echo -n "checking current user domain ... "
|
|
DOMAIN=`id -Z 2>/dev/null | sed 's/:/ /g' | awk '{print $3}'`
|
|
echo ${DOMAIN:-failed}
|
|
if [ "${DOMAIN}" != unconfined_t ]; then
|
|
echo ""
|
|
echo "The regression tests must be launched from the unconfined_t domain."
|
|
echo ""
|
|
echo "The unconfined_t domain is typically the default domain for user"
|
|
echo "shell processes. If the default has been changed on your system,"
|
|
echo "you can revert the changes like this:"
|
|
echo ""
|
|
echo " \$ sudo semanage login -d `whoami`"
|
|
echo ""
|
|
echo "Or, you can add a setting to log in using the unconfined_t domain:"
|
|
echo ""
|
|
echo " \$ sudo semanage login -a -s unconfined_u -r s0-s0:c0.c255 `whoami`"
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
|
|
# SELinux must be configured in enforcing mode
|
|
echo -n "checking selinux operating mode ... "
|
|
CURRENT_MODE=`LANG=C sestatus | grep '^Current mode:' | awk '{print $3}'`
|
|
echo ${CURRENT_MODE:-failed}
|
|
if [ "${CURRENT_MODE}" = enforcing ]; then
|
|
: OK
|
|
elif [ "${CURRENT_MODE}" = permissive -o "${CURRENT_MODE}" = disabled ]; then
|
|
echo ""
|
|
echo "Before running the regression tests, SELinux must be enabled and"
|
|
echo "must be running in enforcing mode."
|
|
echo ""
|
|
echo "If SELinux is currently running in permissive mode, you can"
|
|
echo "switch to enforcing mode using the 'setenforce' command."
|
|
echo
|
|
echo " \$ sudo setenforce 1"
|
|
echo ""
|
|
echo "The system default setting is configured in /etc/selinux/config,"
|
|
echo "or using a kernel boot parameter."
|
|
echo ""
|
|
exit 1
|
|
else
|
|
echo ""
|
|
echo "Unable to determine the current selinux operating mode. Please"
|
|
echo "verify that the sestatus command is installed and in your PATH."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
|
|
# 'sepgsql-regtest' policy module must be loaded
|
|
echo -n "checking for sepgsql-regtest policy ... "
|
|
SELINUX_MNT=`LANG=C sestatus | grep '^SELinuxfs mount:' | awk '{print $3}'`
|
|
if [ "$SELINUX_MNT" = "" ]; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "Unable to find SELinuxfs mount point."
|
|
echo ""
|
|
echo "The sestatus command should report the location where SELinuxfs"
|
|
echo "is mounted, but did not do so."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
if [ ! -e "${SELINUX_MNT}/booleans/sepgsql_regression_test_mode" ]; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "The 'sepgsql-regtest' policy module appears not to be installed."
|
|
echo "Without this policy installed, the regression tests will fail."
|
|
echo "You can install this module using the following commands:"
|
|
echo ""
|
|
echo " \$ make -f /usr/share/selinux/devel/Makefile"
|
|
echo " \$ sudo semodule -u sepgsql-regtest.pp"
|
|
echo ""
|
|
echo "To confirm that the policy package is installed, use this command:"
|
|
echo ""
|
|
echo " \$ sudo semodule -l | grep sepgsql"
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# Verify that sepgsql_regression_test_mode is active.
|
|
echo -n "checking whether policy is enabled ... "
|
|
POLICY_STATUS=`getsebool sepgsql_regression_test_mode | awk '{print $3}'`
|
|
echo ${POLICY_STATUS:-failed}
|
|
if [ "${POLICY_STATUS}" != on ]; then
|
|
echo ""
|
|
echo "The SELinux boolean 'sepgsql_regression_test_mode' must be"
|
|
echo "turned on in order to enable the rules necessary to run the"
|
|
echo "regression tests."
|
|
echo ""
|
|
if [ "${POLICY_STATUS}" = "" ]; then
|
|
echo "We attempted to determine the state of this Boolean using"
|
|
echo "'getsebool', but that command did not produce the expected"
|
|
echo "output. Please verify that getsebool is available and in"
|
|
echo "your PATH."
|
|
else
|
|
echo "You can turn on this variable using the following commands:"
|
|
echo ""
|
|
echo " \$ sudo setsebool sepgsql_regression_test_mode on"
|
|
echo ""
|
|
echo "For security reasons, it is suggested that you turn off this"
|
|
echo "variable when regression testing is complete and the associated"
|
|
echo "rules are no longer needed."
|
|
fi
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
POLICY_STATUS=`getsebool sepgsql_enable_users_ddl | awk '{print $3}'`
|
|
echo ${POLICY_STATUS:-failed}
|
|
if [ "${POLICY_STATUS}" != on ]; then
|
|
echo ""
|
|
echo "The SELinux boolean 'sepgsql_enable_users_ddl' must be"
|
|
echo "turned on in order to enable the rules necessary to run"
|
|
echo "the regression tests."
|
|
echo ""
|
|
if [ "${POLICY_STATUS}" = "" ]; then
|
|
echo "We attempted to determine the state of this Boolean using"
|
|
echo "'getsebool', but that command did not produce the expected"
|
|
echo "output. Please verify that getsebool is available and in"
|
|
echo "your PATH."
|
|
else
|
|
echo "You can turn on this variable using the following commands:"
|
|
echo ""
|
|
echo " \$ sudo setsebool sepgsql_enable_users_ddl on"
|
|
echo ""
|
|
echo "For security reasons, it is suggested that you turn off this"
|
|
echo "variable when regression testing is complete, unless you"
|
|
echo "don't want to allow unprivileged users DDL commands."
|
|
fi
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
|
|
# 'psql' command must be executable from test domain
|
|
echo -n "checking whether we can run psql ... "
|
|
CMD_PSQL="${PG_BINDIR}/psql"
|
|
if [ ! -e "${CMD_PSQL}" ]; then
|
|
echo "not found"
|
|
echo
|
|
echo "${CMD_PSQL} was not found."
|
|
echo "Check your PostgreSQL installation."
|
|
echo
|
|
exit 1
|
|
fi
|
|
runcon -t sepgsql_regtest_user_t "${CMD_PSQL}" --help >& /dev/null
|
|
if [ $? -ne 0 ]; then
|
|
echo "failed"
|
|
echo
|
|
echo "${CMD_PSQL} must be executable from the"
|
|
echo "sepgsql_regtest_user_t domain. That domain has restricted privileges"
|
|
echo "compared to unconfined_t, so the problem may be the psql file's"
|
|
echo "SELinux label. Try"
|
|
echo
|
|
PSQL_T=`matchpathcon -n "${CMD_PSQL}" | sed 's/:/ /g' | awk '{print $3}'`
|
|
if [ "${PSQL_T}" = "user_home_t" ]; then
|
|
# Installation appears to be in /home directory
|
|
echo " \$ sudo restorecon -R ${PG_BINDIR}"
|
|
echo
|
|
echo "Or, using chcon"
|
|
echo
|
|
echo " \$ sudo chcon -t user_home_t ${CMD_PSQL}"
|
|
else
|
|
echo " \$ sudo restorecon -R ${PG_BINDIR}"
|
|
echo
|
|
echo "Or, using chcon"
|
|
echo
|
|
echo " \$ sudo chcon -t bin_t ${CMD_PSQL}"
|
|
fi
|
|
echo
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# loadable module must be installed and not configured to permissive mode
|
|
echo -n "checking sepgsql installation ... "
|
|
VAL="`${CMD_PSQL} -X -t -c 'SHOW sepgsql.permissive' template1 2>/dev/null`"
|
|
RETVAL="$?"
|
|
if [ $RETVAL -eq 2 ]; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "Could not connect to the database server."
|
|
echo "Please check your PostgreSQL installation."
|
|
echo ""
|
|
exit 1
|
|
elif [ $RETVAL -ne 0 ]; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "The sepgsql module does not appear to be loaded. Please verify"
|
|
echo "that the 'shared_preload_libraries' setting in postgresql.conf"
|
|
echo "includes 'sepgsql', and then restart the server."
|
|
echo ""
|
|
echo "See Installation section of the contrib/sepgsql documentation."
|
|
echo ""
|
|
exit 1
|
|
elif ! echo "$VAL" | grep -q 'off$'; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "The parameter 'sepgsql.permissive' is set to 'on'. It must be"
|
|
echo "turned off before running the regression tests."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
echo "ok"
|
|
|
|
# template1 database must be labeled
|
|
# NOTE: this test is wrong; we really ought to be checking template0.
|
|
# But we can't connect to that without extra pushups, and it's not worth it.
|
|
echo -n "checking for labels in template1 ... "
|
|
NUM=`${CMD_PSQL} -XAt -c 'SELECT count(*) FROM pg_catalog.pg_seclabel' template1 2>/dev/null`
|
|
if [ -z "${NUM}" ]; then
|
|
echo "failed"
|
|
echo ""
|
|
echo "In order to test sepgsql, initial labels must be assigned within"
|
|
echo "the 'template1' database. These labels will be copied into the"
|
|
echo "regression test database."
|
|
echo ""
|
|
echo "See Installation section of the contrib/sepgsql documentation."
|
|
echo ""
|
|
exit 1
|
|
fi
|
|
echo "found ${NUM}"
|
|
|
|
#
|
|
# checking complete - let's run the tests
|
|
#
|
|
|
|
echo
|
|
echo "============== running sepgsql regression tests =============="
|
|
|
|
tests="label dml ddl alter misc"
|
|
|
|
# Check if the truncate permission exists in the loaded policy, and if so,
|
|
# run the truncate test
|
|
#
|
|
# Testing the TRUNCATE regression test can be done by manually adding
|
|
# the permission with CIL if necessary:
|
|
# sudo semodule -cE base
|
|
# sudo sed -i -E 's/(class db_table.*?) \)/\1 truncate\)/' base.cil
|
|
# sudo semodule -i base.cil
|
|
|
|
if [ -f /sys/fs/selinux/class/db_table/perms/truncate ]; then
|
|
tests+=" truncate"
|
|
fi
|
|
|
|
make REGRESS="$tests" REGRESS_OPTS="--launcher ./launcher" installcheck
|
|
# exit with the exit code provided by "make"
|