debian-cis/bin/hardening/10.4_default_umask.sh

#!/bin/bash

#
# CIS Debian 7/8 Hardening
#

#
# 10.4 Set Default umask for Users (Scored)
#

set -e # One error, it's over
set -u # One variable unset, it's over

USER='root'
PATTERN='umask 077'
FILES_TO_SEARCH='/etc/bash.bashrc /etc/profile.d /etc/profile'
FILE='/etc/profile.d/CIS_10.4_umask.sh'

# This function will be called if the script status is on enabled / audit mode
audit () {
    SEARCH_RES=0
    for FILE_SEARCHED in $FILES_TO_SEARCH; do
        if [ $SEARCH_RES = 1 ]; then break; fi
        if test -d $FILE_SEARCHED; then
            debug "$FILE_SEARCHED is a directory"
            for file_in_dir in $(ls $FILE_SEARCHED); do
                does_pattern_exist_in_file "$FILE_SEARCHED/$file_in_dir" "^$PATTERN"
                if [ $FNRET != 0 ]; then
                    debug "$PATTERN is not present in $FILE_SEARCHED/$file_in_dir"
                else
                    ok "$PATTERN is present in $FILE_SEARCHED/$file_in_dir"
                    SEARCH_RES=1
                    break
                fi
            done
        else
            does_pattern_exist_in_file "$FILE_SEARCHED" "^$PATTERN"
            if [ $FNRET != 0 ]; then
                debug "$PATTERN is not present in $FILE_SEARCHED"
            else
                ok "$PATTERN is present in $FILES_TO_SEARCH"
                SEARCH_RES=1
            fi
        fi
    done
    if [ $SEARCH_RES = 0 ]; then
        crit "$PATTERN is not present in $FILES_TO_SEARCH"
    fi
}

# This function will be called if the script status is on enabled mode
apply () {
    SEARCH_RES=0
    for FILE_SEARCHED in $FILES_TO_SEARCH; do
        if [ $SEARCH_RES = 1 ]; then break; fi
        if test -d $FILE_SEARCHED; then
            debug "$FILE_SEARCHED is a directory"
            for file_in_dir in $(ls $FILE_SEARCHED); do
                does_pattern_exist_in_file "$FILE_SEARCHED/$file_in_dir" "^$PATTERN"
                if [ $FNRET != 0 ]; then
                    debug "$PATTERN is not present in $FILE_SEARCHED/$file_in_dir"
                else
                    ok "$PATTERN is present in $FILE_SEARCHED/$file_in_dir"
                    SEARCH_RES=1
                    break
                fi
            done
        else
            does_pattern_exist_in_file "$FILE_SEARCHED" "^$PATTERN"
            if [ $FNRET != 0 ]; then
                debug "$PATTERN is not present in $FILE_SEARCHED"
            else
                ok "$PATTERN is present in $FILES_TO_SEARCH"
                SEARCH_RES=1
            fi
        fi
    done
    if [ $SEARCH_RES = 0 ]; then
        warn "$PATTERN is not present in $FILES_TO_SEARCH"
        touch $FILE
        chmod 644 $FILE
        add_end_of_file $FILE "$PATTERN"
    fi
}

# This function will check config parameters required
check_config() {
    :
}

# Source Root Dir Parameter
if [ ! -r /etc/default/cis-hardening ]; then
    echo "There is no /etc/default/cis-hardening file, cannot source CIS_ROOT_DIR variable, aborting"
    exit 128
else
    . /etc/default/cis-hardening
    if [ -z ${CIS_ROOT_DIR:-} ]; then
        echo "No CIS_ROOT_DIR variable, aborting"
        exit 128
    fi
fi

# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
    . $CIS_ROOT_DIR/lib/main.sh
else
    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
    exit 128
fi