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Subject cvs commit: httpd-2.0/docs/manual/mod mod_authz_owner.xml
Date Fri, 17 Jan 2003 01:53:08 GMT
nd          2003/01/16 17:53:07

  Modified:    docs/manual sitemap.xml
  Added:       docs/manual/mod mod_authz_owner.xml
  add documentation for mod_authz_owner
  Revision  Changes    Path
  1.20      +1 -0      httpd-2.0/docs/manual/sitemap.xml
  Index: sitemap.xml
  RCS file: /home/cvs/httpd-2.0/docs/manual/sitemap.xml,v
  retrieving revision 1.19
  retrieving revision 1.20
  diff -u -r1.19 -r1.20
  --- sitemap.xml	22 Dec 2002 22:20:51 -0000	1.19
  +++ sitemap.xml	17 Jan 2003 01:53:07 -0000	1.20
  @@ -138,6 +138,7 @@
  +  <modulefile>mod_authz_owner.xml</modulefile>
  1.1                  httpd-2.0/docs/manual/mod/mod_authz_owner.xml
  Index: mod_authz_owner.xml
  <?xml version="1.0"?>
  <!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
  <?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
  <description>Authorization based on file ownership</description>
  <compatibility>Available in Apache 2.1 and later</compatibility>
      <p>This module authorizes access to files by comparing the userid used
      for HTTP authentication (the web userid) with the file-system owner or
      group of the requested file. The supplied username and password
      must be already properly verified by an authentication module,
      such as <module>mod_auth_basic</module> or
      <module>mod_auth_digest</module>. <module>mod_authz_owner</module>
      recognizes two arguments for the <directive module="core"
      >Require</directive> directive, <code>file-owner</code> and
      <code>file-group</code>, as follows:</p>
        <dd>The supplied web-username must match the system's name for the
        owner of the file being requested. That is, if the operating system
        says the requested file is owned by <code>jones</code>, then the
        username used to access it through the web must be <code>jones</code>
        as well.</dd>
        <dd>The name of the system group that owns the file must be present
        in a group database, which is provided, for example, by <module
        >mod_authz_groupfile</module> or <module>mod_authz_dbm</module>,
        and the web-username must be a member of that group. For example, if
        the operating system says the requested file is owned by (system)
        group <code>accounts</code>, the group <code>accounts</code>
        appear in the group database and the web-username used in the request
        must be a member of that group.</dd>
        <p>If <module>mod_authz_owner</module> is used in order to authorize
        a resource that is not actually present in the filesystem
        (<em>i.e.</em> a virtual resource), it will deny the access.</p>
        <p>Particularly it will never authorize <a
        href="../content-negotiation.html#multiviews">content negotiated
        "MultiViews"</a> resources.</p>
  <seealso><directive module="core">Require</directive></seealso>
  <seealso><directive module="core">Satisfy</directive></seealso>
  <section id="examples"><title>Configuration Examples</title>
      <section id="examples:file-owner"><title>Require file-owner</title>
        <p>Consider a multi-user system running the Apache Web server, with
        each user having his or her own files in <code
        >~/public_html/private</code>. Assuming that there is a single
        <directive module="mod_authn_dbm">AuthDBMUserFile</directive> database
        that lists all of their web-usernames, and that these usernames match
        the system's usernames that actually own the files on the server, then
        the following stanza would allow only the user himself access to his
        own files. User <code>jones</code> would not be allowed to access
        files in <code>/home/smith/public_html/private</code> unless they
        were owned by <code>jones</code> instead of <code>smith</code>.</p>
          &lt;Directory /home/*/public_html/private&gt;<br />
            AuthType Basic<br />
            AuthName MyPrivateFiles<br />
            AuthBasicProvider dbm<br />
            AuthDBMUserFile /usr/local/apache2/etc/.htdbm-all<br />
            Satisfy All<br />
            Require file-owner<br />
      <section id="examples:file-group"><title>Require file-group</title>
        <p>Consider a system similar to the one described above, but with
        some users that share their project files in
        <code>~/public_html/project-foo</code>. The files are owned by the
        system group <code>foo</code> and there is a single <directive
        module="mod_authz_dbm">AuthDBMGroupFile</directive> database that
        contains all of the web-usernames and their group membership,
        <em>i.e.</em> they must be at least member of a group named
        <code>foo</code>. So if <code>jones</code> and <code>smith</code>
        are both member of the group <code>foo</code>, then both will be
        authorized to access the <code>project-foo</code> directories of
        each other.</p>
          &lt;Directory /home/*/public_html/project-foo&gt;<br />
            AuthType Basic<br />
            AuthName "Project Foo Files"<br />
            AuthBasicProvider dbm<br />
            <br />
            # combined user/group database<br />
            AuthDBMUserFile  /usr/local/apache2/etc/.htdbm-all<br />
            AuthDBMGroupFile /usr/local/apache2/etc/.htdbm-all<br />
            <br />
            Satisfy All<br />
            Require file-group<br />
  <description>Sets whether authorization will be passed on to lower level
  <syntax>AuthzOwnerAuthoritative On|Off</syntax>
  <default>AuthzOwnerAuthoritative On</default>
      <p>Setting the <directive>AuthzOwnerAuthoritative</directive>
      directive explicitly to <code>Off</code> allows for
      user authorization to be passed on to lower level modules (as defined
      in the <code>modules.c</code> files) if:</p>
      <li>in the case of <code>file-owner</code> the file-system owner does
      match the supplied web-username or could not be determined, or</li>
      <li>in the case of <code>file-group</code> the file-system group does
      contain the supplied web-username or could not be determined.</li>
      <p>Note that setting the value to <code>Off</code> also allows the
      combination of <code>file-owner</code> and <code>file-group</code>,
      access will be allowed if either one or the other (or both) match.</p>
      <p>By default, control is not passed on and an authorization failure
      will result in an "Authentication Required" reply. Not
      setting it to <code>Off</code> thus keeps the system secure and forces
      an NCSA compliant behaviour.</p>

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