New contrib module, auth_delay.
KaiGai Kohei, with a few changes by me.
This commit is contained in:
Robert Haas
parent
d53c1255d9
commit
fe7a32fc87
@ -6,6 +6,7 @@ include $(top_builddir)/src/Makefile.global
|
||||
|
||||
SUBDIRS = \
|
||||
adminpack \
|
||||
auth_delay \
|
||||
auto_explain \
|
||||
btree_gin \
|
||||
btree_gist \
|
||||
|
||||
@ -28,6 +28,11 @@ adminpack -
|
||||
File and log manipulation routines, used by pgAdmin
|
||||
by Dave Page <dpage@vale-housing.co.uk>
|
||||
|
||||
auth_delay
|
||||
Add a short delay after a failed authentication attempt, to make
|
||||
make brute-force attacks on database passwords a bit harder.
|
||||
by KaiGai Kohei <kaigai@ak.jp.nec.com>
|
||||
|
||||
auto_explain -
|
||||
Log EXPLAIN output for long-running queries
|
||||
by Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp>
|
||||
|
||||
14
contrib/auth_delay/Makefile
Normal file
14
contrib/auth_delay/Makefile
Normal file
@ -0,0 +1,14 @@
|
||||
# contrib/auth_delay/Makefile
|
||||
|
||||
MODULES = auth_delay
|
||||
|
||||
ifdef USE_PGXS
|
||||
PG_CONFIG = pg_config
|
||||
PGXS := $(shell $(PG_CONFIG) --pgxs)
|
||||
include $(PGXS)
|
||||
else
|
||||
subdir = contrib/auth_delay
|
||||
top_builddir = ../..
|
||||
include $(top_builddir)/src/Makefile.global
|
||||
include $(top_srcdir)/contrib/contrib-global.mk
|
||||
endif
|
||||
70
contrib/auth_delay/auth_delay.c
Normal file
70
contrib/auth_delay/auth_delay.c
Normal file
@ -0,0 +1,70 @@
|
||||
/* -------------------------------------------------------------------------
|
||||
*
|
||||
* auth_delay.c
|
||||
*
|
||||
* Copyright (C) 2010, PostgreSQL Global Development Group
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* contrib/auth_delay/auth_delay.c
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
#include "postgres.h"
|
||||
|
||||
#include "libpq/auth.h"
|
||||
#include "port.h"
|
||||
#include "utils/guc.h"
|
||||
#include "utils/timestamp.h"
|
||||
|
||||
PG_MODULE_MAGIC;
|
||||
|
||||
void _PG_init(void);
|
||||
|
||||
/* GUC Variables */
|
||||
static int auth_delay_milliseconds;
|
||||
|
||||
/* Original Hook */
|
||||
static ClientAuthentication_hook_type original_client_auth_hook = NULL;
|
||||
|
||||
/*
|
||||
* Check authentication
|
||||
*/
|
||||
static void
|
||||
auth_delay_checks(Port *port, int status)
|
||||
{
|
||||
/*
|
||||
* Any other plugins which use ClientAuthentication_hook.
|
||||
*/
|
||||
if (original_client_auth_hook)
|
||||
original_client_auth_hook(port, status);
|
||||
|
||||
/*
|
||||
* Inject a short delay if authentication failed.
|
||||
*/
|
||||
if (status != STATUS_OK)
|
||||
{
|
||||
pg_usleep(1000L * auth_delay_milliseconds);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Module Load Callback
|
||||
*/
|
||||
void
|
||||
_PG_init(void)
|
||||
{
|
||||
/* Define custome GUC variables */
|
||||
DefineCustomIntVariable("auth_delay.milliseconds",
|
||||
"Milliseconds to delay before reporting authentication failure",
|
||||
NULL,
|
||||
&auth_delay_milliseconds,
|
||||
0,
|
||||
0, INT_MAX,
|
||||
PGC_SIGHUP,
|
||||
GUC_UNIT_MS,
|
||||
NULL,
|
||||
NULL);
|
||||
/* Install Hooks */
|
||||
original_client_auth_hook = ClientAuthentication_hook;
|
||||
ClientAuthentication_hook = auth_delay_checks;
|
||||
}
|
||||
67
doc/src/sgml/auth-delay.sgml
Normal file
67
doc/src/sgml/auth-delay.sgml
Normal file
@ -0,0 +1,67 @@
|
||||
<!-- doc/src/sgml/auth-delay.sgml -->
|
||||
|
||||
<sect1 id="auth-delay">
|
||||
<title>auth_delay</title>
|
||||
|
||||
<indexterm zone="auth-delay">
|
||||
<primary>auth_delay</primary>
|
||||
</indexterm>
|
||||
|
||||
<para>
|
||||
<filename>auth_delay</filename> causes the server to pause briefly before
|
||||
reporting authentication failure, to make brute-force attacks on database
|
||||
passwords more difficult. Note that it does nothing to prevent
|
||||
denial-of-service attacks, and may even exacerbate them, since processes
|
||||
that are waiting before reporting authentication failure will still consume
|
||||
connection slots.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
In order to function, this module must be loaded via
|
||||
<xref linkend="guc-shared-preload-libraries"> in <filename>postgresql.conf</>.
|
||||
</para>
|
||||
|
||||
<sect2>
|
||||
<title>Configuration parameters</title>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>
|
||||
<varname>auth_delay.milliseconds</varname> (<type>int</type>)
|
||||
</term>
|
||||
<indexterm>
|
||||
<primary><varname>auth_delay.milliseconds</> configuration parameter</primary>
|
||||
</indexterm>
|
||||
<listitem>
|
||||
<para>
|
||||
The number of milliseconds to wait before reporting an authentication
|
||||
failure. The default is 0.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
<para>
|
||||
In order to set these parameters in your <filename>postgresql.conf</> file,
|
||||
you will need to add <literal>auth_delay</> to
|
||||
<xref linkend="guc-custom-variable-classes">. Typical usage might be:
|
||||
</para>
|
||||
|
||||
<programlisting>
|
||||
# postgresql.conf
|
||||
shared_preload_libraries = 'auth_delay'
|
||||
|
||||
custom_variable_classes = 'auth_delay'
|
||||
auth_delay.milliseconds = '500'
|
||||
</programlisting>
|
||||
</sect2>
|
||||
|
||||
<sect2>
|
||||
<title>Author</title>
|
||||
|
||||
<para>
|
||||
KaiGai Kohei <email>kaigai@ak.jp.nec.com</email>
|
||||
</para>
|
||||
</sect2>
|
||||
|
||||
</sect1>
|
||||
@ -81,6 +81,7 @@ psql -d dbname -f <replaceable>SHAREDIR</>/contrib/<replaceable>module</>.sql
|
||||
</para>
|
||||
|
||||
&adminpack;
|
||||
&auth-delay;
|
||||
&auto-explain;
|
||||
&btree-gin;
|
||||
&btree-gist;
|
||||
|
||||
@ -93,6 +93,7 @@
|
||||
<!-- contrib information -->
|
||||
<!entity contrib SYSTEM "contrib.sgml">
|
||||
<!entity adminpack SYSTEM "adminpack.sgml">
|
||||
<!entity auth-delay SYSTEM "auth-delay.sgml">
|
||||
<!entity auto-explain SYSTEM "auto-explain.sgml">
|
||||
<!entity btree-gin SYSTEM "btree-gin.sgml">
|
||||
<!entity btree-gist SYSTEM "btree-gist.sgml">
|
||||
|
||||
Loading…
Reference in New Issue
Block a user