1189 lines
38 KiB
Bash
1189 lines
38 KiB
Bash
#!/usr/bin/env ksh
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#******************************************************************************
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# @(#) manage_sudo.sh
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#******************************************************************************
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# @(#) Copyright (C) 2014 by KUDOS BVBA <info@kudos.be>. All rights reserved.
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#
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# This program is a free software; you can redistribute it and/or modify
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# it under the same terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (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 useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
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#******************************************************************************
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#
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# DOCUMENTATION (MAIN)
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# -----------------------------------------------------------------------------
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# @(#) MAIN: manage_sudo.sh
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# DOES: performs basic functions for SUDO controls: update SUDOers files locally
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# or remote, validate SUDO syntax, distribute the SUDO fragment files
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# EXPECTS: (see --help for more options)
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# REQUIRES: check_config(), check_logging(), check_params(), check_setup(),
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# check_syntax(), count_fields(), die(), display_usage(),
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# distribute2host(), do_cleanup(), fix2host(), log(), resolve_host(),
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# sftp_file(), update2host(), validate_syntax(), warn()
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# For other pre-requisites see the documentation in display_usage()
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#
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# @(#) HISTORY:
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# @(#) 2014-12-16: initial version (VRF 1.0.0) [Patrick Van der Veken]
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# @(#) 2014-12-20: updated SELinux contexts (VRF 1.0.1) [Patrick Van der Veken]
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# @(#) 2015-01-05: added backup feature, see --backup (VRF 1.1.0) [Patrick Van der Veken]
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# @(#) 2015-01-19: updated display_usage() (VRF 1.1.1) [Patrick Van der Veken]
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# @(#) 2015-02-02: allow fragments files to have extensions in merge_fragments()
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# use 'sudo -n' (VRF 1.1.2) [Patrick Van der Veken]
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# @(#) 2015-04-10: fix in --fix-local routine (VRF 1.1.3) [Patrick Van der Veken]
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# @(#) 2015-05-16: added SSH_OWNER_GROUP (VRF 1.1.4) [Patrick Van der Veken]
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# -----------------------------------------------------------------------------
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# DO NOT CHANGE THIS FILE UNLESS YOU KNOW WHAT YOU ARE DOING!
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#******************************************************************************
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#******************************************************************************
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# DATA structures
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#******************************************************************************
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# ------------------------- CONFIGURATION starts here -------------------------
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# define the V.R.F (version/release/fix)
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MY_VRF="1.1.4"
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# name of the user account performing the SUDO controls copies
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# (leave blank for current user)
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SUDO_TRANSFER_USER=""
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# name of the OS group that should own the SUDO controls files
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SUDO_OWNER_GROUP="sudoadmin"
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# extra arguments/options for the SFTP command
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SFTP_ARGS="-o StrictHostKeyChecking=no -o ConnectTimeout=10 -b - "
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# extra arguments/options for the SSH command
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SSH_ARGS="-o StrictHostKeyChecking=no -o ConnectTimeout=10 -n"
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# location of the local SUDO controls directory
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LOCAL_DIR="/etc/sudo_controls"
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# location of the remote SUDO controls directory
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REMOTE_DIR="/etc/sudo_controls/holding"
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# name of the user account performing the SUDO controls update
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# (leave blank for current user but user should have remote sudo root privs)
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SUDO_UPDATE_USER=""
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# path to the visudo tool
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VISUDO_BIN="/usr/sbin/visudo"
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# maximum number of background process to spawn (~maxuprc, ~nstrpty etc)
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MAX_BACKGROUND_PROCS=30
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# location of the backup directory (for configuration & key files)
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BACKUP_DIR="${LOCAL_DIR}/backup"
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# location of log directory (default), see --log-dir)
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LOG_DIR="/var/log"
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# location of temporary working storage
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TMP_DIR="/var/tmp"
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# ------------------------- CONFIGURATION ends here ---------------------------
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# miscelleaneous
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PATH=${PATH}:/usr/bin:/usr/local/bin
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SCRIPT_NAME=$(basename $0)
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SCRIPT_DIR=$(dirname $0)
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OS_NAME="$(uname)"
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FRAGS_FILE=""
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FRAGS_DIR=""
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TARGETS_FILE=""
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FIX_CREATE=0
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CAN_CHECK_SYNTAX=1
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CAN_REMOVE_TEMP=1
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TMP_FILE="${TMP_DIR}/.${SCRIPT_NAME}.$$"
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# command-line parameters
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ARG_ACTION=0 # default is nothing
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ARG_LOG_DIR="" # location of the log directory (~root etc)
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ARG_LOCAL_DIR="" # location of the local SUDO control files
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ARG_REMOTE_DIR="" # location of the remote SUDO control files
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ARG_TARGETS="" # list of remote targets
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ARG_LOG=1 # logging is on by default
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ARG_VERBOSE=1 # STDOUT is on by default
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ARG_DEBUG=0 # debug is off by default
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#******************************************************************************
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# FUNCTION routines
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#******************************************************************************
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# -----------------------------------------------------------------------------
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function check_config
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{
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# SUDO_TRANSFER_USER
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if [[ -z "${SUDO_TRANSFER_USER}" ]]
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then
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SUDO_TRANSFER_USER="${LOGNAME}"
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if [[ -z "${SUDO_TRANSFER_USER}" ]]
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then
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print -u2 "ERROR: unable to set a value for SUDO_TRANSFER_USER in $0"
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exit 1
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fi
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fi
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# LOCAL_DIR
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if [[ -z "${LOCAL_DIR}" ]]
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then
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print -u2 "ERROR: you must define a value for the LOCAL_DIR setting in $0"
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exit 1
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fi
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# REMOTE_DIR
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if [[ -z "${REMOTE_DIR}" ]]
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then
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print -u2 "ERROR: you must define a value for the REMOTE_DIR setting in $0"
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exit 1
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fi
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# SUDO_UPDATE_USER
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if [[ -z "${SUDO_UPDATE_USER}" ]]
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then
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SUDO_UPDATE_USER="${LOGNAME}"
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if [[ -z "${SUDO_UPDATE_USER}" ]]
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then
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print -u2 "ERROR: unable to set a value for SUDO_UPDATE_USER in $0"
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exit 1
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fi
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fi
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# VISUDO_BIN
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if [[ -z "${VISUDO_BIN}" ]]
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then
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print -u2 "ERROR: you must define a value for the VISUDO_BIN setting in $0"
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exit 1
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fi
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# MAX_BACKGROUND_PROCS
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if [[ -z "${MAX_BACKGROUND_PROCS}" ]]
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then
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print -u2 "ERROR: you must define a value for the MAX_BACKGROUND_PROCS setting in $0"
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exit 1
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fi
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# BACKUP_DIR
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if [[ -z "${BACKUP_DIR}" ]]
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then
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print -u2 "ERROR: you must define a value for the BACKUP_DIR setting in $0"
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exit 1
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fi
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return 0
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}
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# -----------------------------------------------------------------------------
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function check_logging
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{
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if (( ARG_LOG ))
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then
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if [[ ! -d "${LOG_DIR}" ]]
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then
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if [[ ! -w "${LOG_DIR}" ]]
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then
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# switch off logging intelligently when needed for permission problems
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# since this script may run with root/non-root actions
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print -u2 "ERROR: unable to write to the log directory at ${LOG_DIR}, disabling logging"
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ARG_LOG=0
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fi
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else
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if [[ ! -w "${LOG_FILE}" ]]
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then
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# switch off logging intelligently when needed for permission problems
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# since this script may run with root/non-root actions
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print -u2 "ERROR: unable to write to the log file at ${LOG_FILE}, disabling logging"
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ARG_LOG=0
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fi
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fi
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fi
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return 0
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}
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# -----------------------------------------------------------------------------
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function check_params
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{
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# -- ALL
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if (( ARG_ACTION < 1 || ARG_ACTION > 9 ))
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then
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display_usage
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exit 0
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fi
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# --fix-local + --fix-dir
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if (( ARG_ACTION == 5 ))
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then
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if [[ -z "${ARG_FIX_DIR}" ]]
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then
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print -u2 "ERROR: you must specify a value for parameter '--fix-dir"
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exit 1
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else
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FIX_DIR="${ARG_FIX_DIR}"
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fi
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fi
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# --local-dir
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if [[ -n "${ARG_LOCAL_DIR}" ]]
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then
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if [ \( ! -d "${ARG_LOCAL_DIR}" \) -o \( ! -r "${ARG_LOCAL_DIR}" \) ]
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then
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print -u2 "ERROR: unable to read directory ${ARG_LOCAL_DIR}"
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exit 1
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else
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LOCAL_DIR="${ARG_LOCAL_DIR}"
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fi
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fi
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# --log-dir
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[[ -z "${ARG_LOG_DIR}" ]] || LOG_DIR="${ARG_LOG_DIR}"
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LOG_FILE="${LOG_DIR}/${SCRIPT_NAME}.log"
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# --remote-dir
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if (( ARG_ACTION == 1 || ARG_ACTION == 2 ))
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then
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if [[ -n "${ARG_REMOTE_DIR}" ]]
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then
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REMOTE_DIR="${ARG_REMOTE_DIR}"
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fi
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fi
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# --targets
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if [[ -n "${ARG_TARGETS}" ]]
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then
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> ${TMP_FILE}
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# write comma-separated target list to the temporary file
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print "${ARG_TARGETS}" | tr -s ',' '\n' | while read TARGET_HOST
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do
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print ${TARGET_HOST} >>${TMP_FILE}
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done
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fi
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# --update + --fix-local
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if (( ARG_ACTION == 4 || ARG_ACTION == 5 ))
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then
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if [[ -n "${TARGETS}" ]]
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then
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print -u2 "ERROR: you cannot specify '--targets' in this context!"
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exit 1
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fi
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fi
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return 0
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}
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# -----------------------------------------------------------------------------
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function check_root_user
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{
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(IFS='()'; set -- $(id); print $2) | read UID
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if [[ "${UID}" = "root" ]]
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then
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return 0
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else
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return 1
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fi
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}
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# -----------------------------------------------------------------------------
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function check_setup
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{
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# use added fall back for LOCAL_DIR (the default script directory)
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[[ -d "${LOCAL_DIR}" ]] || LOCAL_DIR="${SCRIPT_DIR}"
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# check for basic SUDO control files: grants/alias
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for FILE in "${LOCAL_DIR}/grants" "${LOCAL_DIR}/alias"
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do
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if [[ ! -r "${FILE}" ]]
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then
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print -u2 "ERROR: cannot read file ${FILE}"
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exit 1
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fi
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done
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# check for basic SUDO control file(s): targets, /var/tmp/targets.$USER (or $TMP_FILE)
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if (( ARG_ACTION == 1 || ARG_ACTION == 2 || ARG_ACTION == 6 ))
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then
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if [[ -z "${ARG_TARGETS}" ]]
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then
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TARGETS_FILE="${LOCAL_DIR}/targets"
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if [ \( ! -r "${TARGETS_FILE}" \) -a \( ! -r "/var/tmp/targets.${USER}" \) ]
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then
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print -u2 "ERROR: cannot read file ${TARGETS_FILE} nor /var/tmp/targets.${USER}"
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exit 1
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fi
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# override default targets file
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[[ -r "/var/tmp/targets.${USER}" ]] && TARGETS_FILE="/var/tmp/targets.${USER}"
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else
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TARGETS_FILE=${TMP_FILE}
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fi
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fi
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# check for basic SUDO control file(s): fragments, fragments.d/*
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if [[ -d "${LOCAL_DIR}/fragments.d" && -f "${LOCAL_DIR}/fragments" ]]
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then
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print -u2 "WARN: found both a 'fragments' file (${LOCAL_DIR}/fragments) and a 'fragments.d' directory (${LOCAL_DIR}/fragments.d). Ignoring the 'fragments' file"
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fi
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if [[ -d "${LOCAL_DIR}/fragments.d" ]]
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then
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FRAGS_DIR="${LOCAL_DIR}/fragments.d"
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if [[ ! -r "${FRAGS_DIR}" ]]
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then
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print -u2 "ERROR: unable to read directory ${FRAGS_DIR}"
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exit 1
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fi
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elif [[ -f "${LOCAL_DIR}/fragments" ]]
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then
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FRAGS_FILE="${LOCAL_DIR}/fragments"
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if [[ ! -r "${FRAGS_FILE}" ]]
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then
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print -u2 "ERROR: cannot read file ${FRAGS_FILE}"
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exit 1
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fi
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else
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print -u2 "ERROR: could not found any SUDO fragment files in ${LOCAL_DIR}!"
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exit 1
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fi
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# check for SUDO control scripts & configurations (not .local)
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if (( ARG_ACTION == 1 || ARG_ACTION == 2 || ARG_ACTION == 4 ))
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then
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for FILE in "${LOCAL_DIR}/update_sudo.pl" \
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"${LOCAL_DIR}/update_sudo.conf" \
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"${SCRIPT_DIR}/${SCRIPT_NAME}"
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do
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if [[ ! -r "${FILE}" ]]
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then
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print -u2 "ERROR: cannot read file ${FILE}"
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exit 1
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fi
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done
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fi
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# check if 'visudo' exists
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if [[ ! -x "${VISUDO_BIN}" ]]
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then
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print -u2 "WARN: 'visudo' tool not found, syntax checking is not available"
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CAN_CHECK_SYNTAX=0
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fi
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return 0
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}
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# -----------------------------------------------------------------------------
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function check_syntax
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{
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# grants should have 2 fields
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cat "${LOCAL_DIR}/grants" | grep -v -E -e '^#|^$' | while read GRANTS_LINE
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do
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GRANTS_FIELDS=$(count_fields "${GRANTS_LINE}" ":")
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(( GRANTS_FIELDS != 2 )) && die "line '${GRANTS_LINE}' in grants file has missing or too many field(s) (should be 2)"
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done
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# alias should have 2 fields
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cat "${LOCAL_DIR}/alias" | grep -v -E -e '^#|^$' | while read ALIAS_LINE
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do
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ALIAS_FIELDS=$(count_fields "${ALIAS_LINE}" ":")
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(( ALIAS_FIELDS != 2 )) && die "line '${ALIAS_LINE}' in alias file has missing or too many field(s) (should be 2)"
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done
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return 0
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}
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# -----------------------------------------------------------------------------
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function count_fields
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{
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CHECK_LINE="$1"
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CHECK_DELIM="$2"
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NUM_FIELDS=$(print "${CHECK_LINE}" | awk -F "${CHECK_DELIM}" '{ print NF }')
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print $NUM_FIELDS
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return ${NUM_FIELDS}
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}
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# -----------------------------------------------------------------------------
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function die
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{
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NOW="$(date '+%d-%h-%Y %H:%M:%S')"
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if [[ -n "$1" ]]
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then
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if (( ARG_LOG ))
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then
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print - "$*" | while read LOG_LINE
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do
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# filter leading 'ERROR:'
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LOG_LINE="${LOG_LINE#ERROR: *}"
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print "${NOW}: ERROR: [$$]:" "${LOG_LINE}" >>${LOG_FILE}
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done
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fi
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print - "$*" | while read LOG_LINE
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do
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# filter leading 'ERROR:'
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LOG_LINE="${LOG_LINE#ERROR: *}"
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print -u2 "ERROR:" "${LOG_LINE}"
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done
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fi
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# finish up work
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do_cleanup
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exit 1
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}
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# -----------------------------------------------------------------------------
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function display_usage
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{
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cat << EOT
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**** ${SCRIPT_NAME} ****
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**** (c) KUDOS BVBA - Patrick Van der Veken ****
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Performs basic functions for SUDO controls: update SUDOers files locally or
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remote, validate SUDO syntax or copy/distribute the SUDO controls files
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Syntax: ${SCRIPT_DIR}/${SCRIPT_NAME} [--help] | (--backup | --check-syntax | --check-sudo | --preview-global | --update) |
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(--apply [--remote-dir=<remote_directory>] [--targets=<host1>,<host2>,...]) |
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((--copy|--distribute) [--remote-dir=<remote_directory> [--targets=<host1>,<host2>,...]]) |
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([--fix-local --fix-dir=<repository_dir> [--create-dir]] | [--fix-remote [--create-dir] [--targets=<host1>,<host2>,...]])
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[--preview-global] [--local-dir=<local_directory>]
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[--no-log] [--log-dir=<log_directory>] [--debug]
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Parameters:
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--apply|-a : apply SUDO controls remotely (~targets)
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--backup|-b : create a backup of the SUDO controls repository (SUDO master)
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--check-syntax|-s : do basic syntax checking on SUDO controls configuration
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(grants & alias files)
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--check-sudo : validate the SUDO fragments in the holding directory
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--copy|-c : copy SUDO control files to remote host (~targets)
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--create-dir : also create missing directories when fixing the SUDO controls
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repository (see also --fix-local/--fix-remote)
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--debug : print extra status messages on STDERR
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--distribute|-d : same as --copy
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--fix-dir : location of the local SUDO controls client repository
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--fix-local : fix permissions on the local SUDO controls repository
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(local SUDO controls repository given by --fix-dir)
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--fix-remote : fix permissions on the remote SUDO controls repository
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--help|-h : this help text
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--local-dir : location of the SUDO control files on the local filesystem.
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[default: ${LOCAL_DIR}]
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--log-dir : specify a log directory location.
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--no-log : do not log any messages to the script log file.
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--preview-global|-p : dump the global grant namespace (after alias resolution)
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--remote-dir : directory where SUDO control files are/should be
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located/copied on/to the target host
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[default: ${REMOTE_DIR}]
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--targets : comma-separated list of target hosts to operate on. Override the
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hosts contained in the 'targets' configuration file.
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--update|-u : apply SUDO controls locally
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--version|-V : show the script version/release/fix
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Note 1: distribute and update actions are run in parallel across a maximum of
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${MAX_BACKGROUND_PROCS} clients at the same time.
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Note 2: make sure correct 'sudo' rules are setup on the target systems to allow
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the SUDO controls script to run with elevated privileges.
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EOT
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return 0
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}
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# -----------------------------------------------------------------------------
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# distribute SUDO controls to a single host/client
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function distribute2host
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{
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SERVER="$1"
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# convert line to hostname
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SERVER=${SERVER%%;*}
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resolve_host ${SERVER}
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if (( $? ))
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then
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warn "could not lookup host ${SERVER}, skipping"
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return 1
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fi
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# specify copy objects as 'filename!permissions'
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# 1) config files & scripts
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for FILE in "${LOCAL_DIR}/grants!660" \
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"${LOCAL_DIR}/alias!660" \
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"${LOCAL_DIR}/update_sudo.pl!770" \
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"${LOCAL_DIR}/update_sudo.conf!660" \
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"${SCRIPT_DIR}/${SCRIPT_NAME}!770"
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do
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# sftp transfer
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sftp_file ${FILE} ${SERVER}
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COPY_RC=$?
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if (( ! COPY_RC ))
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then
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log "transferred ${FILE%!*} to ${SERVER}:${REMOTE_DIR}"
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else
|
|
warn "failed to transfer ${FILE%!*} to ${SERVER}:${REMOTE_DIR} [RC=${COPY_RC}]"
|
|
fi
|
|
done
|
|
# 2) fragments files
|
|
# are fragments stored in a file or a directory?
|
|
if [[ -n "${FRAGS_DIR}" ]]
|
|
then
|
|
TMP_WORK_DIR="${TMP_DIR}/$0.${RANDOM}"
|
|
mkdir -p ${TMP_WORK_DIR}
|
|
if (( $? ))
|
|
then
|
|
die "unable to create temporary directory ${TMP_WORK_DIR} for mangling of 'fragments' file"
|
|
fi
|
|
# merge fragments file(s) before copy (in a temporary location)
|
|
merge_fragments ${TMP_WORK_DIR}
|
|
if (( $? ))
|
|
then
|
|
die "failed to merge fragments into the temporary file ${TMP_MERGE_FILE}"
|
|
fi
|
|
# sftp transfer
|
|
sftp_file "${TMP_MERGE_FILE}!440" ${SERVER}
|
|
COPY_RC=$?
|
|
if (( ! COPY_RC ))
|
|
then
|
|
log "transferred ${TMP_MERGE_FILE} to ${SERVER}:${REMOTE_DIR}"
|
|
else
|
|
warn "failed to transfer ${TMP_MERGE_FILE%!*} to ${SERVER}:${REMOTE_DIR} [RC=${COPY_RC}]"
|
|
fi
|
|
[[ -d ${TMP_WORK_DIR} ]] && rm -rf ${TMP_WORK_DIR} 2>/dev/null
|
|
else
|
|
sftp_file "${FRAGS_FILE}!440" ${SERVER}
|
|
COPY_RC=$?
|
|
if (( ! COPY_RC ))
|
|
then
|
|
log "transferred ${FRAGS_FILE} to ${SERVER}:${REMOTE_DIR}"
|
|
else
|
|
warn "failed to transfer ${FRAGS_FILE} to ${SERVER}:${REMOTE_DIR} [RC=${COPY_RC}]"
|
|
fi
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
function do_cleanup
|
|
{
|
|
log "performing cleanup ..."
|
|
|
|
# remove temporary file(s)
|
|
[[ -f ${TMP_FILE} ]] && rm -f ${TMP_FILE} >/dev/null 2>&1
|
|
[[ -f ${TMP_MERGE_FILE} ]] && rm -f ${TMP_MERGE_FILE} >/dev/null 2>&1
|
|
# temporary scan file (syntax check)
|
|
if (( CAN_REMOVE_TEMP ))
|
|
then
|
|
[[ -f ${TMP_SCAN_FILE} ]] && rm -f ${TMP_SCAN_FILE} >/dev/null 2>&1
|
|
fi
|
|
|
|
log "*** finish of ${SCRIPT_NAME} [${CMD_LINE}] ***"
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# fix SUDO controls on a single host/client (permissions/ownerships)
|
|
# !! requires appropriate 'sudo' rules on remote client for privilege elevation
|
|
function fix2host
|
|
{
|
|
SERVER="$1"
|
|
SERVER_DIR="$2"
|
|
|
|
# convert line to hostname
|
|
SERVER=${SERVER%%;*}
|
|
resolve_host ${SERVER}
|
|
if (( $? ))
|
|
then
|
|
warn "could not lookup host ${SERVER}, skipping"
|
|
return 1
|
|
fi
|
|
|
|
log "fixing sudo controls on ${SERVER} ..."
|
|
if [[ -z "${SUDO_UPDATE_USER}" ]]
|
|
then
|
|
# own user w/ sudo
|
|
log "$(ssh ${SSH_ARGS} ${SERVER} sudo -n ${REMOTE_DIR}/${SCRIPT_NAME} --fix-local --fix-dir=${SERVER_DIR})"
|
|
elif [[ "${SUDO_UPDATE_USER}" != "root" ]]
|
|
then
|
|
# other user w/ sudo
|
|
log "$(ssh ${SSH_ARGS} ${SUDO_UPDATE_USER}@${SERVER} sudo -n ${REMOTE_DIR}/${SCRIPT_NAME} --fix-local --fix-dir=${SERVER_DIR})"
|
|
else
|
|
# root user w/o sudo
|
|
log "$(ssh ${SSH_ARGS} ${SUDO_UPDATE_USER}@${SERVER} ${REMOTE_DIR}/${SCRIPT_NAME} --fix-local --fix-dir=${SERVER_DIR})"
|
|
fi
|
|
# no error checking possible here due to log(), done in called script
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
function log
|
|
{
|
|
NOW="$(date '+%d-%h-%Y %H:%M:%S')"
|
|
|
|
if [[ -n "$1" ]]
|
|
then
|
|
if (( ARG_LOG ))
|
|
then
|
|
print - "$*" | while read LOG_LINE
|
|
do
|
|
# filter leading 'INFO:'
|
|
LOG_LINE="${LOG_LINE#INFO: *}"
|
|
print "${NOW}: INFO: [$$]:" "${LOG_LINE}" >>${LOG_FILE}
|
|
done
|
|
fi
|
|
if (( ARG_VERBOSE ))
|
|
then
|
|
print - "$*" | while read LOG_LINE
|
|
do
|
|
# filter leading 'INFO:'
|
|
LOG_LINE="${LOG_LINE#INFO: *}"
|
|
print "INFO:" "${LOG_LINE}"
|
|
done
|
|
fi
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# merge fragments into a temporary file
|
|
function merge_fragments
|
|
{
|
|
# initialize temporary working copy (need be different for each background job)
|
|
# do not use 'mktemp' here as we need a fixed file name
|
|
TMP_MERGE_FILE="$1/fragments"
|
|
> ${TMP_MERGE_FILE}
|
|
(( $? )) && die "unable to create temporary file for mangling of 'fragments' file"
|
|
|
|
log "fragments are stored in a DIRECTORY, first merging all fragments into ${TMP_MERGE_FILE}"
|
|
# merge fragments with '%%%<file_name>' headers
|
|
ls -1 ${FRAGS_DIR}/* | while read FILE
|
|
do
|
|
# header first, file base name without extension
|
|
BASE_FILE=${FILE##*/}
|
|
print "%%%${BASE_FILE%%.*}" >>${TMP_MERGE_FILE}
|
|
# content next
|
|
cat ${FILE} >>${TMP_MERGE_FILE}
|
|
done
|
|
|
|
# merge file should not be empty
|
|
[[ -s ${TMP_MERGE_FILE} ]] || return 1
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# resolve a host (check)
|
|
function resolve_host
|
|
{
|
|
LOOKUP_HOST="$1"
|
|
|
|
nslookup $1 2>/dev/null | grep -q -E -e 'Address:.*([0-9]{1,3}[\.]){3}[0-9]{1,3}'
|
|
|
|
return $?
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# transfer a file using sftp
|
|
function sftp_file
|
|
{
|
|
TRANSFER_FILE="$1"
|
|
TRANSFER_HOST="$2"
|
|
|
|
# find the local directory & permission bits
|
|
TRANSFER_DIR="${TRANSFER_FILE%/*}"
|
|
TRANSFER_PERMS="${TRANSFER_FILE##*!}"
|
|
# cut out the permission bits and the directory path
|
|
TRANSFER_FILE="${TRANSFER_FILE%!*}"
|
|
SOURCE_FILE="${TRANSFER_FILE##*/}"
|
|
OLD_PWD=$(pwd) && cd ${TRANSFER_DIR}
|
|
|
|
# transfer, chmod the file to/on the target server (keep STDERR)
|
|
# chmod is not possible in the used security model as files should be
|
|
# owned by root, so must be disabled. This requires a fix operation right
|
|
# after the very first initial SUDO controls distribution:
|
|
# ./manage_sudo.sh --fix-local --fix-dir=/etc/sudo_controls
|
|
sftp ${SFTP_ARGS} ${SUDO_TRANSFER_USER}@${TRANSFER_HOST} >/dev/null <<EOT
|
|
cd ${REMOTE_DIR}
|
|
put ${SOURCE_FILE}
|
|
#chmod ${TRANSFER_PERMS} ${SOURCE_FILE}
|
|
EOT
|
|
SFTP_RC=$?
|
|
|
|
cd ${OLD_PWD}
|
|
|
|
return ${SFTP_RC}
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# update SUDO controls on a single host/client
|
|
function update2host
|
|
{
|
|
SERVER="$1"
|
|
|
|
# convert line to hostname
|
|
SERVER=${SERVER%%;*}
|
|
resolve_host ${SERVER}
|
|
if (( $? ))
|
|
then
|
|
warn "could not lookup host ${SERVER}, skipping"
|
|
return 1
|
|
fi
|
|
|
|
log "setting sudo controls on ${SERVER} ..."
|
|
if [[ -z "${SUDO_UPDATE_USER}" ]]
|
|
then
|
|
# own user w/ sudo
|
|
log "$(ssh ${SSH_ARGS} ${SERVER} sudo -n ${REMOTE_DIR}/${SCRIPT_NAME} --update)"
|
|
elif [[ "${SUDO_UPDATE_USER}" != "root" ]]
|
|
then
|
|
# other user w/ sudo
|
|
log "$(ssh ${SSH_ARGS} ${SUDO_UPDATE_USER}@${SERVER} sudo -n ${REMOTE_DIR}/${SCRIPT_NAME} --update)"
|
|
else
|
|
# root user w/o sudo
|
|
log "$(ssh ${SSH_ARGS} ${SUDO_UPDATE_USER}@${SERVER} ${REMOTE_DIR}/${SCRIPT_NAME} --update)"
|
|
fi
|
|
# no error checking possible here due to log(), done in called script
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# wait for child processes to exit
|
|
function wait_for_children
|
|
{
|
|
WAIT_ERRORS=0
|
|
|
|
# 'endless' loop :-)
|
|
while :
|
|
do
|
|
(( ARG_DEBUG )) && print -u2 "child processes remaining: $*"
|
|
for PID in "$@"
|
|
do
|
|
shift
|
|
# child is still alive?
|
|
if $(kill -0 ${PID} 2>/dev/null)
|
|
then
|
|
(( ARG_DEBUG )) && print -u2 "DEBUG: ${PID} is still alive"
|
|
set -- "$@" "${PID}"
|
|
# wait for sigchild, catching child exit codes is unreliable because
|
|
# the child might have already ended before we get here (caveat emptor)
|
|
elif $(wait ${PID})
|
|
then
|
|
log "child process ${PID} exited"
|
|
else
|
|
log "child process ${PID} exited"
|
|
WAIT_ERRORS=$(( WAIT_ERRORS + 1 ))
|
|
fi
|
|
done
|
|
# break loop if we no child PIDs left
|
|
(($# > 0)) || break
|
|
sleep 1 # required to avoid race conditions
|
|
done
|
|
|
|
return ${WAIT_ERRORS}
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
function warn
|
|
{
|
|
NOW="$(date '+%d-%h-%Y %H:%M:%S')"
|
|
|
|
if [[ -n "$1" ]]
|
|
then
|
|
if (( ARG_LOG ))
|
|
then
|
|
print - "$*" | while read LOG_LINE
|
|
do
|
|
# filter leading 'WARN:'
|
|
LOG_LINE="${LOG_LINE#WARN: *}"
|
|
print "${NOW}: WARN: [$$]:" "${LOG_LINE}" >>${LOG_FILE}
|
|
done
|
|
fi
|
|
if (( ARG_VERBOSE ))
|
|
then
|
|
print - "$*" | while read LOG_LINE
|
|
do
|
|
# filter leading 'WARN:'
|
|
LOG_LINE="${LOG_LINE#WARN: *}"
|
|
print "WARN:" "${LOG_LINE}"
|
|
done
|
|
fi
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
|
|
#******************************************************************************
|
|
# MAIN routine
|
|
#******************************************************************************
|
|
|
|
# parse arguments/parameters
|
|
CMD_LINE="$@"
|
|
for PARAMETER in ${CMD_LINE}
|
|
do
|
|
case ${PARAMETER} in
|
|
-a|-apply|--apply)
|
|
ARG_ACTION=1
|
|
;;
|
|
-b|-backup|--backup)
|
|
ARG_ACTION=9
|
|
;;
|
|
-c|-copy|--copy)
|
|
ARG_ACTION=2
|
|
;;
|
|
-debug|--debug)
|
|
ARG_DEBUG=1
|
|
;;
|
|
-d|-distribute|--distribute)
|
|
ARG_ACTION=2
|
|
;;
|
|
-p|--preview-global|-preview-global)
|
|
ARG_ACTION=7
|
|
;;
|
|
-fix-local|--fix-local)
|
|
ARG_ACTION=5
|
|
;;
|
|
-fix-remote|--fix-remote)
|
|
ARG_ACTION=6
|
|
;;
|
|
-s|-check-syntax|--check-syntax)
|
|
ARG_ACTION=8
|
|
;;
|
|
-check-sudo|--check-sudo)
|
|
ARG_ACTION=3
|
|
ARG_LOG=0
|
|
CAN_CHECK_SYNTAX=1
|
|
CAN_REMOVE_TEMP=1
|
|
;;
|
|
-u|-update|--update)
|
|
ARG_ACTION=4
|
|
;;
|
|
-create-dir|--create-dir)
|
|
FIX_CREATE=1
|
|
;;
|
|
-fix-dir=*)
|
|
ARG_FIX_DIR="${PARAMETER#-fix-dir=}"
|
|
;;
|
|
--fix-dir=*)
|
|
ARG_FIX_DIR="${PARAMETER#--fix-dir=}"
|
|
;;
|
|
-local-dir=*)
|
|
ARG_LOCAL_DIR="${PARAMETER#-local-dir=}"
|
|
;;
|
|
--local-dir=*)
|
|
ARG_LOCAL_DIR="${PARAMETER#--local-dir=}"
|
|
;;
|
|
-log-dir=*)
|
|
ARG_LOG_DIR="${PARAMETER#-log-dir=}"
|
|
;;
|
|
--log-dir=*)
|
|
ARG_LOG_DIR="${PARAMETER#--log-dir=}"
|
|
;;
|
|
-no-log|--no-log)
|
|
ARG_LOG=0
|
|
;;
|
|
-remote-dir=*)
|
|
ARG_REMOTE_DIR="${PARAMETER#-remote-dir=}"
|
|
;;
|
|
--remote-dir=*)
|
|
ARG_REMOTE_DIR="${PARAMETER#--remote-dir=}"
|
|
;;
|
|
-targets=*)
|
|
ARG_TARGETS="${PARAMETER#-targets=}"
|
|
;;
|
|
--targets=*)
|
|
ARG_TARGETS="${PARAMETER#--targets=}"
|
|
;;
|
|
-V|-version|--version)
|
|
print "INFO: $0: ${MY_VRF}"
|
|
exit 0
|
|
;;
|
|
\? | -h | -help | --help)
|
|
display_usage
|
|
exit 0
|
|
;;
|
|
esac
|
|
done
|
|
|
|
# startup checks
|
|
check_params && check_config && check_setup && check_logging
|
|
|
|
# catch shell signals
|
|
trap 'do_cleanup; exit' 1 2 3 15
|
|
|
|
log "*** start of ${SCRIPT_NAME} [${CMD_LINE}] ***"
|
|
(( ARG_LOG )) && log "logging takes places in ${LOG_FILE}"
|
|
|
|
log "runtime info: LOCAL_DIR is set to: ${LOCAL_DIR}"
|
|
|
|
case ${ARG_ACTION} in
|
|
1) # apply SUDO controls remotely
|
|
log "ACTION: apply SUDO controls remotely"
|
|
# build clients list (in array)
|
|
cat "${TARGETS_FILE}" | grep -v -E -e '^#' -e '^$' |\
|
|
{
|
|
I=0
|
|
set -A CLIENTS
|
|
while read LINE
|
|
do
|
|
CLIENTS[${I}]="${LINE}"
|
|
I=$(( I + 1 ))
|
|
done
|
|
}
|
|
# set max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
for CLIENT in ${CLIENTS[@]}
|
|
do
|
|
update2host ${CLIENT} &
|
|
PID=$!
|
|
log "updating ${CLIENT} in background [PID=${PID}] ..."
|
|
# add PID to list of all child PIDs
|
|
PIDS="${PIDS} ${PID}"
|
|
COUNT=$(( COUNT - 1 ))
|
|
if (( COUNT <= 0 ))
|
|
then
|
|
# wait until all background processes are completed
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
PIDS=''
|
|
# reset max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
fi
|
|
done
|
|
# final wait for background processes to be finished completely
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
|
|
log "finished applying SUDO controls remotely"
|
|
;;
|
|
2) # copy/distribute SUDO controls
|
|
log "ACTION: copy/distribute SUDO controls"
|
|
# build clients list (in array)
|
|
cat "${TARGETS_FILE}" | grep -v -E -e '^#' -e '^$' |\
|
|
{
|
|
I=0
|
|
set -A CLIENTS
|
|
while read LINE
|
|
do
|
|
CLIENTS[${I}]="${LINE}"
|
|
I=$(( I + 1 ))
|
|
done
|
|
}
|
|
# set max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
for CLIENT in ${CLIENTS[@]}
|
|
do
|
|
distribute2host ${CLIENT} &
|
|
PID=$!
|
|
log "copying/distributing to ${CLIENT} in background [PID=${PID}] ..."
|
|
# add PID to list of all child PIDs
|
|
PIDS="${PIDS} ${PID}"
|
|
COUNT=$(( COUNT - 1 ))
|
|
if (( COUNT <= 0 ))
|
|
then
|
|
# wait until all background processes are completed
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
PIDS=''
|
|
# reset max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
fi
|
|
done
|
|
# final wait for background processes to be finished completely
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
log "finished copying/distributing SUDO controls"
|
|
;;
|
|
3) # perform syntax checking
|
|
log "ACTION: validating SUDO fragments"
|
|
# are fragments stored in a file or a directory?
|
|
if [[ -n "${FRAGS_DIR}" ]]
|
|
then
|
|
TMP_WORK_DIR="${TMP_DIR}/$0.${RANDOM}"
|
|
mkdir -p ${TMP_WORK_DIR}
|
|
if (( $? ))
|
|
then
|
|
die "unable to create temporary directory ${TMP_WORK_DIR} for mangling of 'fragments' file"
|
|
fi
|
|
merge_fragments ${TMP_WORK_DIR}
|
|
fi
|
|
# remove '%%%' headers
|
|
TMP_SCAN_FILE=$(mktemp)
|
|
(( $? )) && die "unable to create temporary file for validation of 'fragments' file(s)"
|
|
if [[ -n "${FRAGS_DIR}" ]]
|
|
then
|
|
cat ${TMP_MERGE_FILE} | grep -v '^%%%' >${TMP_SCAN_FILE}
|
|
[[ -d ${TMP_WORK_DIR} ]] && rm -rf ${TMP_WORK_DIR} 2>/dev/null
|
|
else
|
|
cat ${FRAGS_FILE} | grep -v '^%%%' >${TMP_SCAN_FILE}
|
|
fi
|
|
# run syntax check
|
|
if (( CAN_CHECK_SYNTAX ))
|
|
then
|
|
CHECK_RESULT="$(${VISUDO_BIN} -c -f ${TMP_SCAN_FILE} 2>/dev/null)"
|
|
if (( $? ))
|
|
then
|
|
warn "SUDO syntax check: FAILED: ${CHECK_RESULT})"
|
|
CAN_REMOVE_TEMP=0
|
|
else
|
|
log "SUDO syntax check: PASSED"
|
|
fi
|
|
fi
|
|
log "finished validating SUDO fragments"
|
|
;;
|
|
4) # apply SUDO controls locally (root user)
|
|
log "ACTION: apply SUDO controls locally"
|
|
log "$(${LOCAL_DIR}/update_sudo.pl -v)"
|
|
# no error checking possible here due to log(), done in called script
|
|
log "finished applying SUDO controls locally"
|
|
;;
|
|
5) # fix directory structure/perms/ownerships
|
|
log "ACTION: fix local SUDO controls repository"
|
|
check_root_user || die "must be run as user 'root'"
|
|
if (( FIX_CREATE ))
|
|
then
|
|
log "you requested to create directories (if needed)"
|
|
else
|
|
log "you requested NOT to create directories (if needed)"
|
|
fi
|
|
|
|
# check if the SUDO control repo is already there
|
|
if [[ ${FIX_CREATE} = 1 && ! -d "${FIX_DIR}" ]]
|
|
then
|
|
# create stub directories
|
|
mkdir -p "${FIX_DIR}/holding" 2>/dev/null || \
|
|
warn "failed to create directory ${FIX_DIR}/holding"
|
|
mkdir -p "${FIX_DIR}/sudoers.d" 2>/dev/null || \
|
|
warn "failed to create directory ${FIX_DIR}/sudoers.d"
|
|
fi
|
|
# fix permissions & ownerships
|
|
if [[ -d "${FIX_DIR}" ]]
|
|
then
|
|
# updating default directories
|
|
chmod 755 "${FIX_DIR}" 2>/dev/null && \
|
|
chown root:sys "${FIX_DIR}" 2>/dev/null
|
|
if [[ -d "${FIX_DIR}/holding" ]]
|
|
then
|
|
chmod 2775 "${FIX_DIR}/holding" 2>/dev/null && \
|
|
chown root:${SUDO_OWNER_GROUP} "${FIX_DIR}/holding" 2>/dev/null
|
|
fi
|
|
if [[ -d "${FIX_DIR}/sudoers.d" ]]
|
|
then
|
|
chmod 755 "${FIX_DIR}/sudoers.d" 2>/dev/null && \
|
|
chown root:sys "${FIX_DIR}/sudoers.d" 2>/dev/null
|
|
fi
|
|
# checking files (sudoers.d/* are fixed by update_sudo.pl)
|
|
for FILE in grants alias fragments update_sudo.conf
|
|
do
|
|
if [[ -f "${FIX_DIR}/holding/${FILE}" ]]
|
|
then
|
|
chmod 660 "${FIX_DIR}/holding/${FILE}" 2>/dev/null && \
|
|
chown root:${SUDO_OWNER_GROUP} "${FIX_DIR}/holding/${FILE}" 2>/dev/null
|
|
fi
|
|
done
|
|
for FILE in manage_sudo.sh update_sudo.pl
|
|
do
|
|
if [[ -f "${FIX_DIR}/holding/${FILE}" ]]
|
|
then
|
|
chmod 770 "${FIX_DIR}/holding/${FILE}" 2>/dev/null && \
|
|
chown root:${SUDO_OWNER_GROUP} "${FIX_DIR}/holding/${FILE}" 2>/dev/null
|
|
fi
|
|
done
|
|
# log file
|
|
if [[ -f "${LOG_FILE}" ]]
|
|
then
|
|
chmod 664 "${LOG_FILE}" 2>/dev/null && \
|
|
chown root:${SUDO_OWNER_GROUP} "${LOG_FILE}" 2>/dev/null
|
|
fi
|
|
# check for SELinux labels
|
|
case ${OS_NAME} in
|
|
*Linux*)
|
|
case "$(getenforce)" in
|
|
*Permissive*|*Enforcing*)
|
|
chcon -R -t etc_t "${FIX_DIR}/sudoers.d"
|
|
;;
|
|
*Disabled*)
|
|
:
|
|
;;
|
|
esac
|
|
;;
|
|
*)
|
|
:
|
|
;;
|
|
esac
|
|
else
|
|
die "SUDO controls repository at "${FIX_DIR}" does not exist?"
|
|
fi
|
|
log "finished applying fixes to the local SUDO control repository"
|
|
;;
|
|
6) # fix remote directory structure/perms/ownerships
|
|
log "ACTION: fix remote SUDO controls repository"
|
|
check_root_user && die "must NOT be run as user 'root'"
|
|
# derive SUDO controls repo from $REMOTE_DIR:
|
|
# /etc/sudo_controls/holding -> /etc/sudo_controls
|
|
FIX_DIR="$(print ${REMOTE_DIR%/*})"
|
|
[[ -z "${FIX_DIR}" ]] && \
|
|
die "could not determine SUDO controls repo path from \$REMOTE_DIR?"
|
|
# build clients list (in array)
|
|
cat "${TARGETS_FILE}" | grep -v -E -e '^#' -e '^$' |\
|
|
{
|
|
I=0
|
|
set -A CLIENTS
|
|
while read LINE
|
|
do
|
|
CLIENTS[${I}]="${LINE}"
|
|
I=$(( I + 1 ))
|
|
done
|
|
}
|
|
# set max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
for CLIENT in ${CLIENTS[@]}
|
|
do
|
|
fix2host ${CLIENT} "${FIX_DIR}" &
|
|
PID=$!
|
|
log "copying/distributing to ${CLIENT} in background [PID=${PID}] ..."
|
|
# add PID to list of all child PIDs
|
|
PIDS="${PIDS} ${PID}"
|
|
COUNT=$(( COUNT - 1 ))
|
|
if (( COUNT <= 0 ))
|
|
then
|
|
# wait until all background processes are completed
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
PIDS=''
|
|
# reset max updates in background
|
|
COUNT=${MAX_BACKGROUND_PROCS}
|
|
fi
|
|
done
|
|
# final wait for background processes to be finished completely
|
|
wait_for_children ${PIDS} || \
|
|
warn "$? background jobs failed to complete correctly"
|
|
log "finished applying fixes to the remote SUDO control repository"
|
|
;;
|
|
7) # dump the configuration namespace
|
|
log "ACTION: dumping the global grant namespace with resolved aliases ..."
|
|
${LOCAL_DIR}/update_sudo.pl --preview --global
|
|
log "finished dumping the global namespace"
|
|
;;
|
|
8) # check syntax of the grants/alias files
|
|
log "ACTION: syntax-checking the configuration files ..."
|
|
check_syntax
|
|
log "finished syntax-checking the configuration files"
|
|
;;
|
|
9) # make backup copy of configuration & fragment files
|
|
log "ACTION: backing up the current configuration & fragment files ..."
|
|
if [[ -d ${BACKUP_DIR} ]]
|
|
then
|
|
TIMESTAMP="$(date '+%Y%m%d-%H%M')"
|
|
BACKUP_TAR_FILE="${BACKUP_DIR}/backup_repo_${TIMESTAMP}.tar"
|
|
if [ \( -f ${BACKUP_TAR_FILE} \) -o \( -f "${BACKUP_TAR_FILE}.gz" \) ]
|
|
then
|
|
die "backup file ${BACKUP_TAR_FILE}(.gz) already exists"
|
|
fi
|
|
# fragments files
|
|
if [[ -n "${FRAGS_DIR}" ]]
|
|
then
|
|
log "$(tar -cvf ${BACKUP_TAR_FILE} ${FRAGS_DIR} 2>/dev/null)"
|
|
else
|
|
log "$(tar -cvf ${BACKUP_TAR_FILE} ${FRAGS_FILE} 2>/dev/null)"
|
|
fi
|
|
# configuration files
|
|
for FILE in "${LOCAL_DIR}/grants" "${LOCAL_DIR}/alias ${LOCAL_DIR}/targets"
|
|
do
|
|
log "$(tar -rvf ${BACKUP_TAR_FILE} ${FILE} 2>/dev/null)"
|
|
done
|
|
log "$(gzip ${BACKUP_TAR_FILE} 2>/dev/null)"
|
|
log "resulting backup file is: $(ls -1 ${BACKUP_TAR_FILE}* 2>/dev/null)"
|
|
else
|
|
die "could not find backup directory ${BACKUP_DIR}. Host is not an SUDO master?"
|
|
fi
|
|
log "finished backing up the current configuration & fragment files"
|
|
;;
|
|
esac
|
|
|
|
# finish up work
|
|
do_cleanup
|
|
|
|
#******************************************************************************
|
|
# END of script
|
|
#******************************************************************************
|