#!/bin/sh
# Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
config=".my.cnf.$$"
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
config=".my.cnf.$$"
command=".mysql.$$"
trap "interrupt" 1 2 3 6 15 # trap 1 2 3 6 15 对应的指令型号，转换为执行一个函数：inter rupt
# trap [træp] 圈套
# 1,SIGHUP
# 2,SIGINT
# 3,SIGQUIT
# 4,SIGILL
# 5,SIGTRAP
rootpass=""
echo_n=
echo_c=
basedir=
defaults_file=
defaults_extra_file=
no_defaults=
parse_arg()
{
echo "$1" | sed -e 's/^[^=]*=//'
}
parse_arguments()
{
# We only need to pass arguments through to the server if we don't
# handle them here. So, we collect unrecognized options (passed on
# the command line) into the args variable.
pick_args=
if test "$1" = PICK-ARGS-FROM-ARGV
then
pick_args=1
shift
fi
for arg
do
case "$arg" in
--basedir=*) basedir=`parse_arg "$arg"` ;;
--defaults-file=*) defaults_file="$arg" ;;
--defaults-extra-file=*) defaults_extra_file="$arg" ;;
--no-defaults) no_defaults="$arg" ;;
*)
if test -n "$pick_args"
then
# This sed command makes sure that any special chars are quoted,
# so the arg gets passed exactly to the server.
# XXX: This is broken; true fix requires using eval and proper
# quoting of every single arg ($basedir, $ldata, etc.)
#args="$args "`echo "$arg" | sed -e 's,\([^a-zA-Z0-9_.-]\),\\\\\1,g'`
args="$args $arg"
fi
;;
esac
done
}
# Try to find a specific file within --basedir which can either be a binary
# release or installed source directory and return the path.
find_in_basedir()
{
return_dir=0
found=0
case "$1" in
--dir)
return_dir=1; shift
;;
esac
file=$1; shift
for dir in "$@"
do
if test -f "$basedir/$dir/$file"
then
found=1
if test $return_dir -eq 1
then
echo "$basedir/$dir"
else
echo "$basedir/$dir/$file"
fi
break
fi
done
if test $found -eq 0
then
# Test if command is in PATH
$file --no-defaults --version > /dev/null 2>&1
status=$?
if test $status -eq 0
then
echo $file
fi
fi
}
cannot_find_file()
{
echo
echo "FATAL ERROR: Could not find $1"
shift
if test $# -ne 0
then
echo
echo "The following directories were searched:"
echo
for dir in "$@"
do
echo " $dir"
done
fi
echo
echo "If you compiled from source, you need to run 'make install' to"
echo "copy the software into the correct location ready for operation."
echo
echo "If you are using a binary release, you must either be at the top"
echo "level of the extracted archive, or pass the --basedir option"
echo "pointing to that location."
echo
}
# Ok, let's go. We first need to parse arguments which are required by
# my_print_defaults so that we can execute it first, then later re-parse
# the command line to add any extra bits that we need.
parse_arguments PICK-ARGS-FROM-ARGV "$@"
#
# We can now find my_print_defaults. This script supports:
#
# --srcdir=path pointing to compiled source tree
# --basedir=path pointing to installed binary location
#
# or default to compiled-in locations.
#
if test -n "$basedir"
then
print_defaults=`find_in_basedir my_print_defaults bin extra`
echo "print: $print_defaults"
if test -z "$print_defaults"
then
cannot_find_file my_print_defaults $basedir/bin $basedir/extra
exit 1
fi
mysql_command=`find_in_basedir mysql bin`
if test -z "$mysql_command"
then
cannot_find_file mysql $basedir/bin
exit 1
fi
else
print_defaults="/usr/bin/my_print_defaults"
mysql_command="/usr/bin/mysql"
fi
if test ! -x "$print_defaults"
then
cannot_find_file "$print_defaults"
exit 1
fi
if test ! -x "$mysql_command"
then
cannot_find_file "$mysql_command"
exit 1
fi
# Now we can get arguments from the group [client] and [client-server]
# in the my.cfg file, then re-run to merge with command line arguments.
parse_arguments `$print_defaults $defaults_file $defaults_extra_file $no_defaults client client-server client-mariadb`
parse_arguments PICK-ARGS-FROM-ARGV "$@"
set_echo_compat() {
case `echo "testing\c"`,`echo -n testing` in
*c*,-n*) echo_n= echo_c= ;;
*c*,*) echo_n=-n echo_c= ;;
*) echo_n= echo_c='\c' ;;
esac
}
validate_reply () {
ret=0
if [ -z "$1" ]; then
reply=y
return $ret
fi
case $1 in
y|Y|yes|Yes|YES) reply=y ;;
n|N|no|No|NO) reply=n ;;
*) ret=1 ;;
esac
return $ret
}
prepare() {
touch $config $command
chmod 600 $config $command
}
do_query() {
echo "$1" >$command
#sed 's,^,> ,' < $command # Debugging
$mysql_command --defaults-file=$config $defaults_extra_file $no_defaults $args <$command
return $?
}
# Simple escape mechanism (\-escape any ' and \), suitable for two contexts:
# - single-quoted SQL strings
# - single-quoted option values on the right hand side of = in my.cnf
#
# These two contexts don't handle escapes identically. SQL strings allow
# quoting any character (\C => C, for any C), but my.cnf parsing allows
# quoting only \, ' or ". For example, password='a\b' quotes a 3-character
# string in my.cnf, but a 2-character string in SQL.
#
# This simple escape works correctly in both places.
basic_single_escape () {
# The quoting on this sed command is a bit complex. Single-quoted strings
# don't allow *any* escape mechanism, so they cannot contain a single
# quote. The string sed gets (as argv[1]) is: s/\(['\]\)/\\\1/g
#
# Inside a character class, \ and ' are not special, so the ['\] character
# class is balanced and contains two characters.
echo "$1" | sed 's/\(['"'"'\]\)/\\\1/g'
}
#
# create a simple my.cnf file to be able to pass the root password to the mysql
# client without putting it on the command line
#
make_config() {
echo "# mysql_secure_installation config file" >$config
echo "[mysql]" >>$config
echo "user=root" >>$config
esc_pass=`basic_single_escape "$rootpass"`
echo "password='$esc_pass'" >>$config
#sed 's,^,> ,' < $config # Debugging
if test -n "$defaults_file"
then
dfile=`parse_arg "$defaults_file"`
cat "$dfile" >>$config
fi
}
get_root_password() {
status=1
while [ $status -eq 1 ]; do
stty -echo
echo $echo_n "Enter current password for root (enter for none): $echo_c"
return $ret
fi
case $1 in
y|Y|yes|Yes|YES) reply=y ;;
n|N|no|No|NO) reply=n ;;
*) ret=1 ;;
esac
return $ret
}
prepare() {
touch $config $command
chmod 600 $config $command
}
do_query() {
echo "$1" >$command
#sed 's,^,> ,' < $command # Debugging
$mysql_command --defaults-file=$config $defaults_extra_file $no_defaults $args <$command
return $?
}
# Simple escape mechanism (\-escape any ' and \), suitable for two contexts:
# - single-quoted SQL strings
# - single-quoted option values on the right hand side of = in my.cnf
#
# These two contexts don't handle escapes identically. SQL strings allow
# quoting any character (\C => C, for any C), but my.cnf parsing allows
# quoting only \, ' or ". For example, password='a\b' quotes a 3-character
# string in my.cnf, but a 2-character string in SQL.
#
# This simple escape works correctly in both places.
basic_single_escape () {
# The quoting on this sed command is a bit complex. Single-quoted strings
# don't allow *any* escape mechanism, so they cannot contain a single
# quote. The string sed gets (as argv[1]) is: s/\(['\]\)/\\\1/g
#
# Inside a character class, \ and ' are not special, so the ['\] character
# class is balanced and contains two characters.
echo "$1" | sed 's/\(['"'"'\]\)/\\\1/g'
}
#
# create a simple my.cnf file to be able to pass the root password to the mysql
# client without putting it on the command line
#
make_config() {
echo "# mysql_secure_installation config file" >$config
echo "[mysql]" >>$config
echo "user=root" >>$config
esc_pass=`basic_single_escape "$rootpass"`
echo "password='$esc_pass'" >>$config
#sed 's,^,> ,' < $config # Debugging
if test -n "$defaults_file"
then
dfile=`parse_arg "$defaults_file"`
cat "$dfile" >>$config
fi
}
get_root_password() {
status=1
while [ $status -eq 1 ]; do
stty -echo
echo $echo_n "Enter current password for root (enter for none): $echo_c"
read password
echo
stty echo
if [ "x$password" = "x" ]; then
hadpass=0
else
hadpass=1
fi
rootpass=$password
make_config
do_query ""
status=$?
done
echo "OK, successfully used password, moving on..."
echo
}
set_root_password() {
stty -echo
echo $echo_n "New password: $echo_c"
read password1
echo
echo $echo_n "Re-enter new password: $echo_c"
read password2
echo
stty echo
if [ "$password1" != "$password2" ]; then
echo "Sorry, passwords do not match."
echo
return 1
fi
if [ "$password1" = "" ]; then
echo "Sorry, you can't use an empty password here."
echo
return 1
fi
esc_pass=`basic_single_escape "$password1"`
do_query "UPDATE mysql.user SET Password=PASSWORD('$esc_pass') WHERE User='root';"
if [ $? -eq 0 ]; then
echo "Password updated successfully!"
echo "Reloading privilege tables.."
reload_privilege_tables
if [ $? -eq 1 ]; then
clean_and_exit
fi
echo
rootpass=$password1
make_config
else
echo "Password update failed!"
clean_and_exit
fi
return 0
}
remove_anonymous_users() {
do_query "DELETE FROM mysql.user WHERE User='';"
if [ $? -eq 0 ]; then
echo " ... Success!"
else
echo " ... Failed!"
clean_and_exit
fi
return 0
}
remove_remote_root() {
do_query "DELETE FROM mysql.user WHERE User='root' AND Host NOT IN ('localhost', '127.0.0.1', '::1');"
if [ $? -eq 0 ]; then
echo " ... Success!"
else
echo " ... Failed!"
fi
}
remove_test_database() {
echo " - Dropping test database..."
do_query "DROP DATABASE IF EXISTS test;"
if [ $? -eq 0 ]; then
echo " ... Success!"
else
echo " ... Failed! Not critical, keep moving..."
fi
echo " - Removing privileges on test database..."
do_query "DELETE FROM mysql.db WHERE Db='test' OR Db='test\\_%'"
if [ $? -eq 0 ]; then
echo " ... Success!"
else
echo " ... Failed! Not critical, keep moving..."
fi
return 0
}
reload_privilege_tables() {
do_query "FLUSH PRIVILEGES;"
if [ $? -eq 0 ]; then
echo " ... Success!"
return 0
else
echo " ... Failed!"
return 1
fi
}
interrupt() {
echo
echo "Aborting!"
echo
cleanup
stty echo
exit 1
}
cleanup() {
echo "Cleaning up..."
rm -f $config $command
}
# Remove the files before exiting.
clean_and_exit() {
cleanup
exit 1
}
# The actual script starts here
prepare
set_echo_compat
echo
echo "NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB"
echo " SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!"
echo
echo "In order to log into MariaDB to secure it, we'll need the current"
echo "password for the root user. If you've just installed MariaDB, and"
echo "you haven't set the root password yet, the password will be blank,"
echo "so you should just press enter here."
echo
get_root_password
#
# Set the root password
#
echo "Setting the root password ensures that nobody can log into the MariaDB"
echo "root user without the proper authorisation."
echo
while true ; do
if [ $hadpass -eq 0 ]; then
echo $echo_n "Set root password? [Y/n] $echo_c"
else
echo "You already have a root password set, so you can safely answer 'n'."
echo
echo $echo_n "Change the root password? [Y/n] $echo_c"
fi
read reply
validate_reply $reply && break
done
if [ "$reply" = "n" ]; then
echo " ... skipping."
else
status=1
while [ $status -eq 1 ]; do
set_root_password
status=$?
done
fi
echo
#
# Remove anonymous users
#
echo "By default, a MariaDB installation has an anonymous user, allowing anyone"
echo "to log into MariaDB without having to have a user account created for"
echo "them. This is intended only for testing, and to make the installation"
echo "go a bit smoother. You should remove them before moving into a"
echo "production environment."
echo
while true ; do
echo $echo_n "Remove anonymous users? [Y/n] $echo_c"
read reply
validate_reply $reply && break
done
if [ "$reply" = "n" ]; then
echo " ... skipping."
else
remove_anonymous_users
fi
echo
#
# Disallow remote root login
#
echo "Normally, root should only be allowed to connect from 'localhost'. This"
echo "ensures that someone cannot guess at the root password from the network."
echo
while true ; do
echo $echo_n "Disallow root login remotely? [Y/n] $echo_c"
read reply
validate_reply $reply && break
done
if [ "$reply" = "n" ]; then
echo " ... skipping."
else
remove_remote_root
fi
echo
#
# Remove test database
#
echo "By default, MariaDB comes with a database named 'test' that anyone can"
echo "access. This is also intended only for testing, and should be removed"
echo "before moving into a production environment."
echo
while true ; do
echo $echo_n "Remove test database and access to it? [Y/n] $echo_c"
read reply
validate_reply $reply && break
done
if [ "$reply" = "n" ]; then
echo " ... skipping."
else
remove_test_database
fi
echo
#
# Reload privilege tables
#
echo "Reloading the privilege tables will ensure that all changes made so far"
echo "will take effect immediately."
echo
while true ; do
echo $echo_n "Reload privilege tables now? [Y/n] $echo_c"
read reply
validate_reply $reply && break
done
if [ "$reply" = "n" ]; then
echo " ... skipping."
else
reload_privilege_tables
fi
echo
cleanup
echo
echo "All done! If you've completed all of the above steps, your MariaDB"
echo "installation should now be secure."
echo
echo "Thanks for using MariaDB!"
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