tests/pam_ssh_agent_auth: Add a new sanity test
This commit is contained in:
Jakub Jelen
parent
6b2140deea
commit
1ce235ac38
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# Makefile of /CoreOS/openssh/Sanity/pam_ssh_agent_auth
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# Description: This is a basic sanity test for pam_ssh_agent_auth
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# Author: Jakub Jelen <jjelen@redhat.com>
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# Copyright (c) 2015 Red Hat, Inc.
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#
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# This program is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be
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# useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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# PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see http://www.gnu.org/licenses/.
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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export TEST=/CoreOS/openssh/Sanity/pam_ssh_agent_auth
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export TESTVERSION=1.0
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BUILT_FILES=
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FILES=$(METADATA) runtest.sh Makefile PURPOSE pam_save_ssh_var.c
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.PHONY: all install download clean
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run: $(FILES) build
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./runtest.sh
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build: $(BUILT_FILES)
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test -x runtest.sh || chmod a+x runtest.sh
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clean:
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rm -f *~ $(BUILT_FILES)
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-include /usr/share/rhts/lib/rhts-make.include
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$(METADATA): Makefile
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@echo "Owner: Jakub Jelen <jjelen@redhat.com>" > $(METADATA)
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@echo "Name: $(TEST)" >> $(METADATA)
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@echo "TestVersion: $(TESTVERSION)" >> $(METADATA)
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@echo "Path: $(TEST_DIR)" >> $(METADATA)
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@echo "Description: This is basic sanity test for pam_ssh_agent_auth" >> $(METADATA)
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@echo "Type: Sanity" >> $(METADATA)
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@echo "TestTime: 5m" >> $(METADATA)
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@echo "RunFor: openssh" >> $(METADATA)
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@echo "Requires: openssh pam_ssh_agent_auth pam-devel expect" >> $(METADATA)
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@echo "RhtsRequires: library(distribution/fips)" >> $(METADATA)
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@echo "Priority: Normal" >> $(METADATA)
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@echo "License: GPLv2+" >> $(METADATA)
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@echo "Confidential: no" >> $(METADATA)
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@echo "Destructive: no" >> $(METADATA)
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@echo "Releases: -RHEL4 -RHELClient5 -RHELServer5" >> $(METADATA)
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rhts-lint $(METADATA)
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@ -0,0 +1,7 @@
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PURPOSE of /CoreOS/openssh/Sanity/pam_ssh_agent_auth
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Description: This is basic sanity test for pam_ssh_agent_auth
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Author: Jakub Jelen <jjelen@redhat.com>
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Created as a response to rhbz#1251777 and previous one rhbz#1225106.
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The code of pam module is outdated and compiled with current openssh
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version which went through quite enough refactoring.
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/*
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This simple pam module saves the content of SSH_USER_AUTH variable to /tmp/SSH_USER_AUTH
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file.
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Setup:
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- gcc -fPIC -DPIC -shared -rdynamic -o pam_save_ssh_var.o pam_save_ssh_var.c
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- copy pam_save_ssh_var.o to /lib/security resp. /lib64/security
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- add to /etc/pam.d/sshd
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auth requisite pam_save_ssh_var.o
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*/
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/* Define which PAM interfaces we provide */
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#define PAM_SM_ACCOUNT
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#define PAM_SM_AUTH
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#define PAM_SM_PASSWORD
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#define PAM_SM_SESSION
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/* Include PAM headers */
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <stdlib.h>
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#include <stdio.h>
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int save_ssh_var(pam_handle_t *pamh, const char *phase) {
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FILE *fp;
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const char *var;
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fp = fopen("/tmp/SSH_USER_AUTH","a");
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fprintf(fp, "BEGIN (%s)\n", phase);
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var = pam_getenv(pamh, "SSH_USER_AUTH");
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if (var != NULL) {
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fprintf(fp, "SSH_USER_AUTH: '%s'\n", var);
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}
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fprintf(fp, "END (%s)\n", phase);
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fclose(fp);
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return 0;
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}
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/* PAM entry point for session creation */
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int pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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return(PAM_IGNORE);
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}
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/* PAM entry point for session cleanup */
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int pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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return(PAM_IGNORE);
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}
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/* PAM entry point for accounting */
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int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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return(PAM_IGNORE);
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}
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/* PAM entry point for authentication verification */
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int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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save_ssh_var(pamh, "auth");
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return(PAM_IGNORE);
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}
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/*
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PAM entry point for setting user credentials (that is, to actually
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establish the authenticated user's credentials to the service provider)
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*/
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int pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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return(PAM_IGNORE);
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}
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/* PAM entry point for authentication token (password) changes */
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int pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char **argv) {
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return(PAM_IGNORE);
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}
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@ -0,0 +1,184 @@
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#!/bin/bash
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# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# runtest.sh of /CoreOS/openssh/Sanity/pam_ssh_agent_auth
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# Description: This is a basic sanity test for pam_ssh_agent_auth
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# Author: Jakub Jelen <jjelen@redhat.com>
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# Copyright (c) 2015 Red Hat, Inc.
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#
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# This program is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be
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# useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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# PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see http://www.gnu.org/licenses/.
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# Include Beaker environment
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. /usr/bin/rhts-environment.sh || exit 1
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. /usr/share/beakerlib/beakerlib.sh || exit 1
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PACKAGE="openssh"
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PAM_SUDO="/etc/pam.d/sudo"
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PAM_SSHD="/etc/pam.d/sshd"
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PAM_MODULE="pam_save_ssh_var"
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SUDOERS_CFG="/etc/sudoers.d/01_pam_ssh_auth"
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SSHD_CFG="/etc/ssh/sshd_config"
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USER="testuser$RANDOM"
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PASS="testpassxy4re.3298fhdsaf"
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AUTH_KEYS="/etc/security/authorized_keys"
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AK_COMMAND_BIN="/root/ak.sh"
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AK_COMMAND_KEYS="/root/akeys"
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declare -a KEYS=("rsa" "ecdsa")
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rlJournalStart
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rlPhaseStartSetup
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rlAssertRpm $PACKAGE
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rlAssertRpm pam_ssh_agent_auth
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rlImport distribution/fips
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rlServiceStart sshd
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rlRun "TmpDir=\$(mktemp -d)" 0 "Creating tmp directory"
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rlRun "cp ${PAM_MODULE}.c $TmpDir/"
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rlRun "pushd $TmpDir"
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rlFileBackup --clean $PAM_SUDO /etc/sudoers /etc/sudoers.d/ /etc/security/ $AUTH_KEYS
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rlRun "sed -i '1 a\
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auth sufficient pam_ssh_agent_auth.so file=$AUTH_KEYS' $PAM_SUDO"
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rlRun "echo 'Defaults env_keep += \"SSH_AUTH_SOCK\"' > $SUDOERS_CFG"
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rlRun "echo 'Defaults !requiretty' >> $SUDOERS_CFG"
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grep '^%wheel' /etc/sudoers || \
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rlRun "echo '%wheel ALL=(ALL) ALL' >> $SUDOERS_CFG"
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rlRun "useradd $USER -G wheel"
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rlRun "echo $PASS |passwd --stdin $USER"
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rlPhaseEnd
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if ! fipsIsEnabled; then
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KEYS+=("dsa")
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fi
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for KEY in "${KEYS[@]}"; do
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rlPhaseStartTest "Test with key type $KEY"
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rlRun "su $USER -c 'ssh-keygen -t $KEY -f ~/.ssh/my_id_$KEY -N \"\"'" 0
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# Without authorized_keys, the authentication should fail
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rlRun -s "su $USER -c 'eval \`ssh-agent\`; sudo id; ssh-agent -k'" 0
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rlAssertNotGrep "uid=0(root) gid=0(root)" $rlRun_LOG
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# Append the keys only to make sure we can match also the non-first line
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rlRun "cat ~$USER/.ssh/my_id_${KEY}.pub >> $AUTH_KEYS"
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rlRun -s "su $USER -c 'eval \`ssh-agent\`; ssh-add ~/.ssh/my_id_$KEY; sudo id; ssh-agent -k'"
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rlAssertGrep "uid=0(root) gid=0(root)" $rlRun_LOG
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rlPhaseEnd
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done
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if rlIsRHEL '<6.8' || ( rlIsRHEL '<7.3' && rlIsRHEL 7 ) ; then
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: # not available
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else
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rlPhaseStartSetup "Setup for authorized_keys_command"
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rlFileBackup --namespace ak_command $PAM_SUDO
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rlRun "rm -f $AUTH_KEYS"
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cat >$AK_COMMAND_BIN <<_EOF
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#!/bin/bash
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cat $AK_COMMAND_KEYS
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_EOF
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rlRun "chmod +x $AK_COMMAND_BIN"
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rlRun "sed -i 's|.*pam_ssh_agent_auth.*|auth sufficient pam_ssh_agent_auth.so authorized_keys_command=$AK_COMMAND_BIN authorized_keys_command_user=root|' $PAM_SUDO"
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rlRun "cat $PAM_SUDO"
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rlPhaseEnd
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for KEY in "${KEYS[@]}"; do
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rlPhaseStartTest "Test authorized_keys_command with key type $KEY (bz1299555, bz1317858)"
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rlRun "cat ~$USER/.ssh/my_id_${KEY}.pub >$AK_COMMAND_KEYS"
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rlRun -s "su $USER -c 'eval \`ssh-agent\`; ssh-add ~/.ssh/my_id_$KEY; sudo id; ssh-agent -k'"
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rlAssertGrep "uid=0(root) gid=0(root)" $rlRun_LOG
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rlPhaseEnd
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done
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rlPhaseStartCleanup "Cleanup for authorized_keys_command"
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rlFileRestore --namespace ak_command
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rlRun "rm -f $AK_COMMAND_BIN $AK_COMMAND_KEYS"
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rlPhaseEnd
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fi
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if rlIsRHEL '>=7.3'; then # not in Fedora anymore
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rlPhaseStartTest "bz1312304 - Exposing information about succesful auth"
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rlRun "rlFileBackup --namespace exposing $PAM_SSHD"
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rlRun "rlFileBackup --namespace exposing $SSHD_CFG"
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rlRun "rlFileBackup --namespace exposing /root/.ssh/"
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rlRun "rm -f ~/.ssh/id_rsa*"
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rlRun "ssh-keygen -f ~/.ssh/id_rsa -N \"\"" 0
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rlRun "ssh-keyscan localhost >~/.ssh/known_hosts" 0
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USER_AK_FILE=~$USER/.ssh/authorized_keys
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rlRun "cat ~/.ssh/id_rsa.pub >$USER_AK_FILE"
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rlRun "chown $USER:$USER $USER_AK_FILE"
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rlRun "chmod 0600 $USER_AK_FILE"
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rlRun "gcc -fPIC -DPIC -shared -rdynamic -o $PAM_MODULE.o $PAM_MODULE.c"
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rlRun "test -d /lib64/security && cp $PAM_MODULE.o /lib64/security/" 0,1
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rlRun "test -d /lib/security && cp $PAM_MODULE.o /lib/security/" 0,1
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rlRun "sed -i '1 i auth optional $PAM_MODULE.o' $PAM_SSHD"
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# pam-and-env should expose information to both PAM and environmental variable;
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# we will be testing only env variable here for the time being,
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rlRun "echo 'ExposeAuthenticationMethods pam-and-env' >>$SSHD_CFG"
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rlRun "sed -i '/^ChallengeResponseAuthentication/ d' $SSHD_CFG"
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rlRun "service sshd restart"
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rlWaitForSocket 22 -t 5
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rlRun -s "ssh -i ~/.ssh/id_rsa $USER@localhost \"env|grep SSH_USER_AUTH\"" 0 \
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"Environment variable SSH_USER_AUTH is set"
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rlAssertGrep "^SSH_USER_AUTH=publickey:" $rlRun_LOG
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rlRun "rm -f $rlRun_LOG"
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# pam-only should expose information only to PAM and not to environment variable
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rlRun "sed -i 's/pam-and-env/pam-only/' $SSHD_CFG"
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rlRun "echo 'AuthenticationMethods publickey,keyboard-interactive:pam' >>$SSHD_CFG"
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rlRun "service sshd restart"
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rlWaitForSocket 22 -t 5
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ssh_with_pass() {
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ssh_args=("-i /root/.ssh/id_rsa")
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ssh_args+=("$USER@localhost")
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cat >ssh.exp <<_EOF
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#!/usr/bin/expect -f
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set timeout 5
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spawn ssh ${ssh_args[*]} "echo CONNECTED; env|grep SSH_USER_AUTH"
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expect {
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-re {.*[Pp]assword.*} { send -- "$PASS\r"; exp_continue }
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timeout { exit 1 }
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eof { exit 0 }
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}
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_EOF
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rlRun -s "expect -f ssh.exp"
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}
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#rlRun -s "ssh ${ssh_args[*]} \"echo CONNECTED; env|grep SSH_USER_AUTH\"" 1 \
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#"Environment variable SSH_USER_AUTH is NOT set"
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rlRun "ssh_with_pass"
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rlRun "grep -q CONNECTED $rlRun_LOG" 0 "Connection was successful"
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rlAssertGrep "^SSH_USER_AUTH: 'publickey:" /tmp/SSH_USER_AUTH
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rlRun "cat /tmp/SSH_USER_AUTH"
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rlRun "rm -f $rlRun_LOG /tmp/SSH_USER_AUTH"
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for pm in /lib64/security/$PAM_MODULE.o /lib/security/$PAM_MODULE.o; do
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rlRun "test -e $pm && rm -f $pm" 0,1
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done
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rlRun "rlFileRestore --namespace exposing"
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rlPhaseEnd
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fi
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rlPhaseStartCleanup
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rlRun "popd"
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rlRun "rm -r $TmpDir" 0 "Removing tmp directory"
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rlRun "userdel -r $USER"
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rlFileRestore
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rlServiceRestore sshd
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rlPhaseEnd
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rlJournalPrintText
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rlJournalEnd
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@ -15,6 +15,7 @@
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- role: standard-test-beakerlib
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tests:
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- port-forwarding
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- pam_ssh_agent_auth
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required_packages:
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- iproute # needs ip command
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- procps-ng # needs ps and pgrep commands
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@ -24,3 +25,7 @@
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- net-tools # needs netstat command
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- libselinux-utils # needs selinuxenabled command
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- nmap-ncat # needs nc command
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- pam_ssh_agent_auth
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- gcc # needs to test pam_ssh_agent_auth
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- pam-devel # needs to test pam_ssh_agent_auth
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- expect # needs to test pam_ssh_agent_auth
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