#!/bin/bash
# run-shellcheck
#
# OVH Security audit
#

#
# Check that any password that may exist in /etc/shadow is SHA512 hashed and salted
#

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

# shellcheck disable=2034
DESCRIPTION="Check that any password that may exist in /etc/shadow is SHA512 hashed and salted"

CONF_FILE="/etc/login.defs"
CONF_LINE="ENCRYPT_METHOD SHA512"

# This function will be called if the script status is on enabled / audit mode
audit () {
# Check conf file for default SHA512 hash
    if $SUDO_CMD [ ! -r $CONF_FILE ]; then
        crit "$CONF_FILE is not readable"
    else
        does_pattern_exist_in_file $CONF_FILE "^ *${CONF_LINE/ /[[:space:]]+}"
        if [ "$FNRET" = 0 ]; then
            ok "$CONF_LINE is present in $CONF_FILE"
        else
            crit "$CONF_LINE is not present in $CONF_FILE"
        fi
    fi
}

# This function will be called if the script status is on enabled mode
apply () {
    does_pattern_exist_in_file $CONF_FILE "^ *${CONF_LINE/ /[[:space:]]+}"
    if [ "$FNRET" = 0 ]; then
        ok "$CONF_LINE is present in $CONF_FILE"
    else
        warn "$CONF_LINE is not present in $CONF_FILE, adding it"
        does_pattern_exist_in_file "$CONF_FILE" "^$(echo "$CONF_LINE" | cut -d ' ' -f1)"
        if [ "$FNRET" != 0 ]; then
            add_end_of_file $CONF_FILE "$CONF_LINE"
        else
            info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
            replace_in_file "$CONF_FILE" "^$(echo "$CONF_LINE" | cut -d ' ' -f1)[[:space:]]*.*" "$CONF_LINE"
        fi
        /etc/init.d/ssh reload > /dev/null 2>&1
    fi
}

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

# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
    . /etc/default/cis-hardening
fi
if [ -z "$CIS_ROOT_DIR" ]; then
     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
     echo "Cannot source CIS_ROOT_DIR variable, aborting."
    exit 128
fi

# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
    # shellcheck source=/opt/debian-cis/lib/main.sh
    . "$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