1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
--><title>mod_authn_dbm - Apache HTTP Server</title><link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /><link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /><link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link href="../images/favicon.ico" rel="shortcut icon" /></head><body><div id="page-header"><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></div><div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div><div id="path"><a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module mod_authn_dbm</h1><table class="module"><tr><th><a href="module-dict.html#Description">Description:
</a></th><td>User authentication using DBM files</td></tr><tr><th><a href="module-dict.html#Status">Status:
</a></th><td>Extension</td></tr><tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:
</a></th><td>authn_dbm_module</td></tr><tr><th><a href="module-dict.html#SourceFile">Source File:
</a></th><td>mod_authn_dbm.c</td></tr><tr><th><a href="module-dict.html#Compatibility">Compatibility:
</a></th><td>Available in Apache 2.0.42 and later</td></tr></table><h3>Summary</h3>
<p>This module provides authentication front-ends such as
<code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code> and <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>
to authenticate users by looking up users in plain text password files.
Similar functionality is provided by <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>.</p>
<p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or
<code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>, this module is invoked via the
<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or
<code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
with the 'dbm' value.</p>
</div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#authdbmauthoritative">AuthDBMAuthoritative</a></li><li><img alt="" src="../images/down.gif" /> <a href="#authdbmtype">AuthDBMType</a></li><li><img alt="" src="../images/down.gif" /> <a href="#authdbmuserfile">AuthDBMUserFile</a></li></ul><h3>See also</h3><ul class="seealso"><li><code class="directive"><a href="../mod/core.html#authname">AuthName</a></code></li><li><code class="directive"><a href="../mod/core.html#authtype">AuthType</a></code></li><li>
<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code>
</li><li>
<code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
</li></ul></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDBMAuthoritative" id="AuthDBMAuthoritative">AuthDBMAuthoritative</a> <a name="authdbmauthoritative" id="authdbmauthoritative">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
</a></th><td>Sets whether authentication and authorization will be
passwed on to lower level modules</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
</a></th><td>AuthDBMAuthoritative on|off</td></tr><tr><th><a href="directive-dict.html#Default">Default:
</a></th><td><code>AuthDBMAuthoritative on</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
</a></th><td>Extension</td></tr><tr><th><a href="directive-dict.html#Module">Module:
</a></th><td>mod_authn_dbm</td></tr></table>
<p>Setting the <code class="directive">AuthDBMAuthoritative</code>
directive explicitly to <strong>'off'</strong> allows for both
authentication and authorization to be passed on to lower level
modules (as defined in the <code>Configuration</code> and
<code>modules.c</code> file if there is <strong>no userID</strong>
or <strong>rule</strong> matching the supplied userID. If there is
a userID and/or rule specified; the usual password and access
checks will be applied and a failure will give an Authorization
Required reply.</p>
<p>So if a userID appears in the database of more than one module;
or if a valid <code class="directive"><a href="../mod/core.html#require">Require</a></code>
directive applies to more than one module; then the first module
will verify the credentials; and no access is passed on;
regardless of the <code class="directive">AuthAuthoritative</code> setting.</p>
<p>A common use for this is in conjunction with one of the
auth providers; such as <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>. Whereas this
DBM module supplies the bulk of the user credential checking; a
few (administrator) related accesses fall through to a lower
level with a well protected .htpasswd file.</p>
<p>By default, control is not passed on and an unknown userID
or rule will result in an Authorization Required reply. Not
setting it thus keeps the system secure and forces an NCSA
compliant behaviour.</p>
<p>Security: Do consider the implications of allowing a user to
allow fall-through in his .htaccess file; and verify that this
is really what you want; Generally it is easier to just secure
a single .htpasswd file, than it is to secure a database which
might have more access interfaces.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDBMType" id="AuthDBMType">AuthDBMType</a> <a name="authdbmtype" id="authdbmtype">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
</a></th><td>Sets the type of database file that is used to
store passwords</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
</a></th><td>AuthDBMType default|SDBM|GDBM|NDBM|DB</td></tr><tr><th><a href="directive-dict.html#Default">Default:
</a></th><td><code>AuthDBMType default</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
</a></th><td>Extension</td></tr><tr><th><a href="directive-dict.html#Module">Module:
</a></th><td>mod_authn_dbm</td></tr><tr><th><a href="directive-dict.html#Compatibility">Compatibility:
</a></th><td>Available in version 2.0.30 and later.</td></tr></table>
<p>Sets the type of database file that is used to store the passwords.
The default database type is determined at compile time. The
availability of other types of database files also depends on
<a href="../install.html#dbm">compile-time settings</a>.</p>
<p>It is crucial that whatever program you use to create your password
files is configured to use the same type of database.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDBMUserFile" id="AuthDBMUserFile">AuthDBMUserFile</a> <a name="authdbmuserfile" id="authdbmuserfile">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
</a></th><td>Sets the name of a database file containing the list of users and
passwords for authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
</a></th><td>AuthDBMUserFile <em>file-path</em></td></tr><tr><th><a href="directive-dict.html#Context">Context:
</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
</a></th><td>Extension</td></tr><tr><th><a href="directive-dict.html#Module">Module:
</a></th><td>mod_authn_dbm</td></tr></table>
<p>The <code class="directive">AuthDBMUserFile</code> directive sets the
name of a DBM file containing the list of users and passwords for
user authentication. <em>File-path</em> is the absolute path to
the user file.</p>
<p>The user file is keyed on the username. The value for a user is
the <code>crypt()</code> encrypted password, optionally followed
by a colon and arbitrary data. The colon and the data following it
will be ignored by the server.</p>
<p>Security: make sure that the
<code class="directive">AuthDBMUserFile</code> is stored outside the
document tree of the web-server; do <em>not</em> put it in the
directory that it protects. Otherwise, clients will be able to
download the <code class="directive">AuthDBMUserFile</code>.</p>
<p>Important compatibility note: The implementation of
"dbmopen" in the apache modules reads the string length of the
hashed values from the DBM data structures, rather than relying
upon the string being NULL-appended. Some applications, such as
the Netscape web server, rely upon the string being
NULL-appended, so if you are having trouble using DBM files
interchangeably between applications this may be a part of the
problem.</p>
<p>A perl script called
<a href="../programs/dbmmanage.html">dbmmanage</a> is included with
Apache. This program can be used to create and update DBM
format password files for use with this module.</p>
</div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</a></p><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div></body></html>
|
