forked from wazuh/wazuh-docker
First refactor commit
This commit is contained in:
manuasir
@@ -0,0 +1,264 @@
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#!/bin/bash
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# Wazuh Docker Copyright (C) 2019 Wazuh Inc. (License GPLv2)
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# Variables
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source /permanent_data.env
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WAZUH_INSTALL_PATH=/var/ossec
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WAZUH_CONFIG_MOUNT=/wazuh-config-mount
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AUTO_ENROLLMENT_ENABLED=${AUTO_ENROLLMENT_ENABLED:-true}
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API_GENERATE_CERTS=${API_GENERATE_CERTS:-true}
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##############################################################################
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# Aux functions
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##############################################################################
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print() {
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echo -e $1
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}
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error_and_exit() {
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echo "Error executing command: '$1'."
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echo 'Exiting.'
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exit 1
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}
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exec_cmd() {
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eval $1 > /dev/null 2>&1 || error_and_exit "$1"
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}
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exec_cmd_stdout() {
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eval $1 2>&1 || error_and_exit "$1"
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}
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##############################################################################
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# Edit configuration
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##############################################################################
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edit_configuration() { # $1 -> setting, $2 -> value
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sed -i "s/^config.$1\s=.*/config.$1 = \"$2\";/g" "${WAZUH_INSTALL_PATH}/api/configuration/config.js" || error_and_exit "sed (editing configuration)"
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}
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##############################################################################
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# This function will attempt to mount every directory in PERMANENT_DATA
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# into the respective path.
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# If the path is empty means permanent data volume is also empty, so a backup
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# will be copied into it. Otherwise it will not be copied because there is
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# already data inside the volume for the specified path.
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##############################################################################
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mount_permanent_data() {
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for permanent_dir in "${PERMANENT_DATA[@]}"; do
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# Check if the path is not empty
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if find ${permanent_dir} -mindepth 1 | read; then
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print "The path ${permanent_dir} is already mounted"
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else
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print "Installing ${permanent_dir}"
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exec_cmd "cp -a ${WAZUH_INSTALL_PATH}/data_tmp/permanent${permanent_dir}/. ${permanent_dir}"
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fi
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done
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}
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##############################################################################
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# This function will replace from the permanent data volume every file
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# contained in PERMANENT_DATA_EXCP
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# Some files as 'internal_options.conf' are saved as permanent data, but
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# they must be updated to work properly if wazuh version is changed.
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##############################################################################
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apply_exclusion_data() {
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for exclusion_file in "${PERMANENT_DATA_EXCP[@]}"; do
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if [ -e ${WAZUH_INSTALL_PATH}/data_tmp/exclusion/${exclusion_file} ]
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then
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print "Updating ${exclusion_file}"
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exec_cmd "cp -p ${WAZUH_INSTALL_PATH}/data_tmp/exclusion/${exclusion_file} ${exclusion_file}"
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fi
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done
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}
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##############################################################################
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# This function will delete from the permanent data volume every file
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# contained in PERMANENT_DATA_DEL
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##############################################################################
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remove_data_files() {
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for del_file in "${PERMANENT_DATA_DEL[@]}"; do
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if [ -e ${del_file} ]
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then
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print "Removing ${del_file}"
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exec_cmd "rm ${del_file}"
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fi
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done
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}
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##############################################################################
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# Create certificates: Manager
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##############################################################################
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create_ossec_key_cert() {
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print "Creating ossec-authd key and cert"
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exec_cmd "openssl genrsa -out ${WAZUH_INSTALL_PATH}/etc/sslmanager.key 4096"
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exec_cmd "openssl req -new -x509 -key ${WAZUH_INSTALL_PATH}/etc/sslmanager.key -out ${WAZUH_INSTALL_PATH}/etc/sslmanager.cert -days 3650 -subj /CN=${HOSTNAME}/"
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}
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##############################################################################
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# Create certificates: API
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##############################################################################
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create_api_key_cert() {
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print "Enabling Wazuh API HTTPS"
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edit_configuration "https" "yes"
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print "Create Wazuh API key and cert"
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exec_cmd "openssl genrsa -out ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.key 4096"
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exec_cmd "openssl req -new -x509 -key ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.key -out ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.crt -days 3650 -subj /CN=${HOSTNAME}/"
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# Granting proper permissions
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chmod 400 ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.key
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chmod 400 ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.crt
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}
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##############################################################################
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# Copy all files from $WAZUH_CONFIG_MOUNT to $WAZUH_INSTALL_PATH and respect
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# destination files permissions
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#
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# For example, to mount the file /var/ossec/data/etc/ossec.conf, mount it at
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# $WAZUH_CONFIG_MOUNT/etc/ossec.conf in your container and this code will
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# replace the ossec.conf file in /var/ossec/data/etc with yours.
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##############################################################################
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mount_files() {
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if [ -e "$WAZUH_CONFIG_MOUNT" ]
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then
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print "Identified Wazuh configuration files to mount..."
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exec_cmd_stdout "cp --verbose -r $WAZUH_CONFIG_MOUNT/* $WAZUH_INSTALL_PATH"
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else
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print "No Wazuh configuration files to mount..."
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fi
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}
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##############################################################################
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# Stop OSSEC
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##############################################################################
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function ossec_shutdown(){
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${WAZUH_INSTALL_PATH}/bin/ossec-control stop;
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}
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##############################################################################
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# Interpret any passed arguments (via docker command to this entrypoint) as
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# paths or commands, and execute them.
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#
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# This can be useful for actions that need to be run before the services are
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# started, such as "/var/ossec/bin/ossec-control enable agentless".
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##############################################################################
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docker_custom_args() {
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for CUSTOM_COMMAND in "$@"
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do
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echo "Executing command \`${CUSTOM_COMMAND}\`"
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exec_cmd_stdout "${CUSTOM_COMMAND}"
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done
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}
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##############################################################################
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# Change Wazuh API user credentials.
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##############################################################################
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change_api_user_credentials() {
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pushd /var/ossec/api/configuration/auth/
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if [[ "x${SECURITY_CREDENTIALS_FILE}" == "x" ]]; then
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WAZUH_API_USER=${API_USER}
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WAZUH_API_PASS=${API_PASS}
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else
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input=${SECURITY_CREDENTIALS_FILE}
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while IFS= read -r line
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do
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if [[ $line == *"WAZUH_API_USER"* ]]; then
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arrIN=(${line//:/ })
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WAZUH_API_USER=${arrIN[1]}
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elif [[ $line == *"WAZUH_API_PASS"* ]]; then
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arrIN=(${line//:/ })
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WAZUH_API_PASS=${arrIN[1]}
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fi
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done < "$input"
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fi
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echo "Change Wazuh API user credentials"
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change_user="node htpasswd -b -c user $WAZUH_API_USER $WAZUH_API_PASS"
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eval $change_user
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popd
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}
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##############################################################################
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# Customize filebeat output ip
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##############################################################################
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custom_filebeat_output_ip() {
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if [ "$FILEBEAT_OUTPUT" != "" ]; then
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sed 's|http://elasticsearch:9200|$FILEBEAT_OUTPUT|g' filebeat.yml
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fi
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}
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##############################################################################
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# Main function
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##############################################################################
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main() {
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# Mount permanent data (i.e. ossec.conf)
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mount_permanent_data
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# Restore files stored in permanent data that are not permanent (i.e. internal_options.conf)
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apply_exclusion_data
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# Remove some files in permanent_data (i.e. .template.db)
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remove_data_files
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# Generate ossec-authd certs if AUTO_ENROLLMENT_ENABLED is true and does not exist
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if [ $AUTO_ENROLLMENT_ENABLED == true ]
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then
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if [ ! -e ${WAZUH_INSTALL_PATH}/etc/sslmanager.key ]
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then
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create_ossec_key_cert
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fi
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fi
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# Generate API certs if API_GENERATE_CERTS is true and does not exist
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if [ $API_GENERATE_CERTS == true ]
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then
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if [ ! -e ${WAZUH_INSTALL_PATH}/api/configuration/ssl/server.crt ]
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then
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create_api_key_cert
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fi
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fi
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# Mount selected files (WAZUH_CONFIG_MOUNT) to container
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mount_files
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# Trap exit signals and do a proper shutdown
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trap "ossec_shutdown; exit" SIGINT SIGTERM
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# Execute custom args
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docker_custom_args
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# Change API user credentials
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change_api_user_credentials
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# Update filebeat configuration
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custom_filebeat_output_ip
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# Delete temporary data folder
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rm -rf ${WAZUH_INSTALL_PATH}/data_tmp
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# Grant proper permissions
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# When modifiying some files using the Wazuh API (i.e. /var/ossec/etc/ossec.conf), group rw permissions are needed for changes to take place.
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# https://github.com/wazuh/wazuh/issues/3647
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chmod -R g+rw ${WAZUH_INSTALL_PATH}
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}
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main
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