Commit a034ba92 authored by Chris Darroch's avatar Chris Darroch
Browse files

Documentation revisions for r709838 and r709839. 


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@709841 13f79535-47bb-0310-9956-ffa450edef68
parent 2561cf80

docs/conf/httpd.conf.in

+0 −11
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@@ -154,17 +154,6 @@ DocumentRoot "@exp_htdocsdir@" 
    # Controls who can get stuff from this server.

    #

    Require all granted



    #

    # <Directory> and <Location> directives inherit their parent's authorization

    # rules and applies them using AND logic instead of the previous OR logic of

    # Apache 2.2 and before.  To disable the merging of these rules use

    # "AuthzMergeRules Off".

    #

    # This prevents the "Require all denied" rule in "<Directory />" above

    # from being included in this directory's configuration.

    #

    AuthzMergeRules Off

</Directory>



#

docs/manual/howto/auth.xml

+69 −97
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@@ -54,7 +54,6 @@ module from each group.</p> 
      <li><module>mod_authn_anon</module></li>

      <li><module>mod_authn_dbd</module></li>

      <li><module>mod_authn_dbm</module></li>

      <li><module>mod_authn_default</module></li>

      <li><module>mod_authn_file</module></li>

      <li><module>mod_authnz_ldap</module></li>

    </ul>
@@ -65,7 +64,6 @@ module from each group.</p> 
      <li><module>mod_authnz_ldap</module></li>

      <li><module>mod_authz_dbd</module></li>

      <li><module>mod_authz_dbm</module></li>

      <li><module>mod_authz_default</module></li>

      <li><module>mod_authz_groupfile</module></li>

      <li><module>mod_authz_host</module></li>

      <li><module>mod_authz_owner</module></li>
@@ -430,12 +428,14 @@ person in</title> 
    &lt;/Directory&gt;

    </example>



    <p>To take authorization a little further, the directives

    <directive module="mod_authz_core">&lt;SatisfyAll&gt;</directive> and

    <directive module="mod_authz_core">&lt;SatisfyOne&gt;</directive> allow

    AND/OR logic to be applied so that the order in which authorization

    is handled can be completely controled through the configuration. See

    these directives for a complete example on they can be applied.</p>

    <p>To take authorization a little further, authorization container

    directives such as

    <directive module="mod_authz_core" type="section">MatchAll</directive> and

    <directive module="mod_authz_core" type="section">MatchAny</directive>

    allow logic to be applied so that the order in which authorization

    is handled can be completely controled through the configuration.

    See <a href="../mod/mod_authz_core.html#logic">Authorization

    Containers</a> for an example of they may be applied.</p>



</section>
@@ -445,75 +445,61 @@ person in</title> 
    than just a single check against a single data store. Ordering, logic

    and choosing how authorization will be done is now possible.</p>



    <section id="authandororder"><title>Applying AND/OR logic and ordering</title>

    <section id="authandororder"><title>Applying logic and ordering</title>

        <p>Controling how and in what order authorization will be applied

        has been a bit of a mystery in the past. In Apache 2.2 a provider based

        has been a bit of a mystery in the past. In Apache 2.2 a provider-based

        authentication mechanism was introduced to decouple the actual 

        authentication process from authorization and supporting functionality.

        One of the side benefits was that authentication providers could be

        configured and called in a specific order which didn't depend on the 

        load order of the auth module itself. This same provider based mechanism 

        has been brought forward into authorization as well. What this means is 

        that the <directive module="mod_authz_core">Require</directive> directive 

        not only specifies which authorization methods should be used, it also 

        that the <directive module="mod_authz_core">Require</directive> and

        <directive module="mod_authz_core">Match</directive> directives

        not only specify which authorization methods should be used, they also 

        specifies the order in which they are called. Multiple authorization 

        methods are called in the same order in which the 

        <directive module="mod_authz_core">Require</directive> directives appear 

        in the configuration.</p>



        <p>With the introduction of the directives 

        <directive module="mod_authz_core">&lt;SatisfyAll&gt;</directive> and 

        <directive module="mod_authz_core">&lt;SatisfyOne&gt;</directive>, the 

        configuration also has control over when the

        <directive module="mod_authz_core">Require</directive>

        or <directive module="mod_authz_core">Match</directive> directives

        appear in the configuration.</p>



        <p>With the introduction of authorization container directives

        such as

        <directive module="mod_authz_core" type="section">MatchAll</directive>

        and 

        <directive module="mod_authz_core" type="section">MatchAny</directive>,

        the configuration also has control over when the

        authorization methods are called and what criteria determines when 

        access is granted. For example the following authorization block would 

        apply the logic:</p>



        <example>

          # if ((user == "John") ||<br />

          # &nbsp;&nbsp; ((Group == "admins")<br />

          # &nbsp; &nbsp; &amp;&amp; (ldap-group &lt;ldap-object&gt; contains auth'ed_user)<br />

          # &nbsp; &nbsp; &amp;&amp; ((ldap-attribute dept == "sales")<br />

          # &nbsp; &nbsp; &nbsp; &nbsp; || (file-group contains auth'ed_user))))<br />

          # then<br />

          # &nbsp; auth_granted<br />

          # else<br />

          # &nbsp; auth_denied<br />

          #<br />

          &lt;Directory /www/mydocs&gt;<br />

          <indent>

            Authname ...<br />

            AuthBasicProvider ...<br />

            ...<br />

            Require user John<br />

            &lt;SatisfyAll&gt;<br />

            <indent>

              Require Group admins<br />

              Require ldap-group cn=mygroup,o=foo<br />

              &lt;SatisfyOne&gt;<br />

              <indent>

                Require ldap-attribute dept="sales"<br />

                Require file-group<br />

              </indent>

              &lt;/SatisfyOne&gt;<br />

            </indent>

            &lt;/SatisfyAll&gt;<br />

          </indent>

          &lt;/Directory&gt;

        </example>



        <p>By default all <directive module="mod_authz_core">Require</directive> 

        directives are handled through an OR operation. In other words, if 

        access is granted.  See

        <a href="../mod/mod_authz_core.html#logic">Authorization Containers</a>

        for an example of how they may be used to express complex

        authorization logic.</p>



        <p>By default all

        <directive module="mod_authz_core">Require</directive> 

        directives are handled as though contained within a

        <directive module="mod_authz_core" type="section">MatchAny</directive>

        container directive.  In other words, if 

        any of the specified authorization methods succeed, then authorization 

        is granted. By enclosing a set of 

        <directive module="mod_authz_core">Require</directive> directives within

        a <directive module="mod_authz_core">&lt;SatisfyAll&gt;</directive> block,

        the processing switches to an AND operation which requires all authorization 

        methods to succeed before authorization is granted.</p>

        is granted.</p>



        <p>In contrast, by default all

        <directive module="mod_authz_core">Match</directive> directives

        are handled as though contained within a

        <directive module="mod_authz_core" type="section">MatchAll</directive>

        container directive (unless they are explicitly contained within

        a different authorization container directive).

        This permits

        <directive module="mod_authz_core">Match</directive> directives

        to be usefully mixed with negated

        <code>Match not</code> directives.  To authorize the request,

        none of the negated directives can match their parameters,

        while all of the positive directives must match their

        parameters (or else return a neutral result).</p>



    </section>



    <section id="reqaccessctrl"><title>Using 'Require' or 'Reject' for access control</title>

    <section id="reqaccessctrl"><title>Using authorization providers for access control</title>

        <p>Authentication by username and password is only part of the

        story. Frequently you want to let people in based on something

        other than who they are. Something such as where they are
@@ -529,7 +515,7 @@ person in</title> 


        <p>The usage of these providers is specified through the 

        <directive module="mod_authz_core">Require</directive> and 

        <directive module="mod_authz_core">Reject</directive> directives.

        <directive module="mod_authz_core">Match</directive> directives.

        These directives register the authorization providers

        that will be called during the authorization stage of the request

        processing. For example:</p>
@@ -554,7 +540,7 @@ person in</title> 
        following:</p>

    

        <example>

          Reject ip 10.252.46.165

          Match not ip 10.252.46.165

        </example>

    

        <p>Visitors coming from that address will not be able to see
@@ -562,30 +548,33 @@ person in</title> 
        machine name, rather than an IP address, you can use that.</p>

    

        <example>

          Reject host <var>host.example.com</var>

          Match not host <var>host.example.com</var>

        </example>

    

        <p>And, if you'd like to block access from an entire domain,

        you can specify just part of an address or domain name:</p>

    

        <example>

          &lt;SatisfyAll&gt;<br />

          Match all granted<br />

          &lt;MatchNotAny&gt;

          <indent>

            Reject ip <var>192.168.205</var><br />

            Reject host <var>phishers.example.com</var> <var>moreidiots.example</var><br />           Reject host ke<br />

            Match ip 192.168.205<br />

            Match host phishers.example.com moreidiots.example<br />

            Match host ke

          </indent>

          &lt;/SatisfyAll&gt;

          &lt;/MatchNotAny&gt;

        </example>

    

        <p>Using the <directive module="mod_authz_host">Reject</directive> directive

        inside of a <directive module="mod_authz_core">&lt;SatisfyAll&gt;</directive>

        block, will let you be sure that you are actually restricting things to 

        only the group that you want to let in.</p>

    

        <p>The above example uses the <directive module="mod_authz_core">

        &lt;SatisfyAll&gt;</directive> block to make sure that all of the 

        <directive module="mod_authz_host">Reject</directive> directives are 

        satisfied before granting access. </p>

        <p>The above example uses the <directive module="mod_authz_core"

        type="section">MatchNotAny</directive> container directive

        to make sure that none of the 

        <directive module="mod_authz_host">Match</directive> directives

        match their parameters before granting access.  Note that

        the <code>Match all granted</code> directive and the

        <directive module="mod_authz_core"

        type="section">MatchNotAny</directive> are implicitly contained

        within a <directive module="mod_authz_core"

        type="section">MatchAll</directive> directive.</p>

    

    </section>
@@ -598,23 +587,6 @@ person in</title> 
        <directive module="mod_access_compat">Satisfy</directive> are no longer needed. 

        However to provide backwards compatibility for older configurations, these 

        directives have been moved to the <module>mod_access_compat</module> module.</p>



        <p>One of the problems with these directives was that the line between

        authorization and access control was very fuzzy. The 

        <directive module="mod_access_compat">Satisfy</directive> directive

        tried to tie these two stages together by hooking itself into the 

        request processing itself. Now that these directive have been moved to the

        <module>mod_access_compat</module>, mixing the new authorization directives

        with the older access control directives becomes difficult. To address this

        issue, the <module>mod_authz_default</module> module becomes very important and must

        be loaded. The main purpose of the <module>mod_authz_default</module> module is 

        to handle any authorization requests that could not be handled by the 

        authorization providers. But when the older access control directives are used, 

        it also links access control with authorization and determines if access 

        should be granted based on the outcome of each stage. Therefore if the 

        older directives do not seem to be working properly, it might be because the

        <module>mod_authz_default</module> module has not been loaded.</p>



    </section>



</section>

docs/manual/mod/mod_access_compat.xml

+1 −3
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@@ -60,9 +60,7 @@ have been deprecated by the new authz refactoring. Please see 
    <note type="warning"><title>Note</title>

      <p>The directives provided by <module>mod_access_compat</module> have

      been deprecated by the new authz refactoring. Please see 

      <module>mod_authz_host</module>.  The module 

      <module>mod_authz_default</module> must also be loaded to provide for

      default authorization handling.</p>

      <module>mod_authz_host</module>.</p>

    </note>



    <p>In general, access restriction directives apply to all

docs/manual/mod/mod_auth_basic.xml

+1 −4
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@@ -41,10 +41,7 @@ 
<seealso><directive module="mod_authn_core">AuthName</directive></seealso>

<seealso><directive module="mod_authn_core">AuthType</directive></seealso>

<seealso><directive module="mod_authz_core">Require</directive></seealso>

<seealso><directive module="mod_authz_core">Reject</directive></seealso>

<seealso><directive module="mod_access_compat">Satisfy</directive> (Deprecated)</seealso>

<seealso><directive module="mod_authz_core">&lt;SatisfyAll&gt;</directive></seealso>

<seealso><directive module="mod_authz_core">&lt;SatisfyOne&gt;</directive></seealso>

<seealso><directive module="mod_authz_core">Match</directive></seealso>

<seealso><a href="../howto/auth.html">Authentication howto</a></seealso>



<directivesynopsis>

docs/manual/mod/mod_auth_digest.xml

+1 −0
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@@ -38,6 +38,7 @@ 
<seealso><directive module="mod_authn_core">AuthName</directive></seealso>

<seealso><directive module="mod_authn_core">AuthType</directive></seealso>

<seealso><directive module="mod_authz_core">Require</directive></seealso>

<seealso><directive module="mod_authz_core">Match</directive></seealso>

<seealso><a href="../howto/auth.html">Authentication howto</a></seealso>



<section id="using"><title>Using Digest Authentication</title>