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<h2 class="file-name">/Auth/OpenID/Server.php</h2>

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<p class="short-description">OpenID server protocol and logic.</p>
<p class="description"><p>Overview</p><p>An OpenID server must perform three tasks:</p><p><ol><li>Examine the incoming request to determine its nature and validity.</li><li>Make a decision about how to respond to this request.</li><li>Format the response according to the protocol.</li></ol>  The first and last of these tasks may performed by the <a href="../OpenID/Auth_OpenID_Server.html#methoddecodeRequest">Auth_OpenID_Server::decodeRequest()</a> and Auth_OpenID_Server::encodeResponse methods.  Who gets to do the  intermediate task -- deciding how to respond to the request -- will  depend on what type of request it is.</p><p>If it's a request to authenticate a user (a 'checkid_setup' or  'checkid_immediate' request), you need to decide if you will assert  that this user may claim the identity in question.  Exactly how you  do that is a matter of application policy, but it generally  involves making sure the user has an account with your system and  is logged in, checking to see if that identity is hers to claim,  and verifying with the user that she does consent to releasing that  information to the party making the request.</p><p>Examine the properties of the <a href="../OpenID/Auth_OpenID_CheckIDRequest.html">Auth_OpenID_CheckIDRequest</a>  object, and if and when you've come to a decision, form a response  by calling <a href="../OpenID/Auth_OpenID_CheckIDRequest.html#methodanswer">Auth_OpenID_CheckIDRequest::answer()</a>.</p><p>Other types of requests relate to establishing associations between  client and server and verifing the authenticity of previous  communications.  <a href="../OpenID/Auth_OpenID_Server.html">Auth_OpenID_Server</a> contains all the logic  and data necessary to respond to such requests; just pass it to  <a href="../OpenID/Auth_OpenID_Server.html#methodhandleRequest">Auth_OpenID_Server::handleRequest()</a>.</p><p>OpenID Extensions</p><p>Do you want to provide other information for your users in addition  to authentication?  Version 1.2 of the OpenID protocol allows  consumers to add extensions to their requests.  For example, with  sites using the Simple Registration  Extension  (http://www.openidenabled.com/openid/simple-registration-extension/),  a user can agree to have their nickname and e-mail address sent to  a site when they sign up.</p><p>Since extensions do not change the way OpenID authentication works,  code to handle extension requests may be completely separate from  the <a href="../OpenID/Auth_OpenID_Request.html">Auth_OpenID_Request</a> class here.  But you'll likely want  data sent back by your extension to be signed.  <a href="../OpenID/Auth_OpenID_ServerResponse.html">Auth_OpenID_ServerResponse</a> provides methods with which you can add  data to it which can be signed with the other data in the OpenID  signature.</p><p>For example:</p><p><pre>  // when request is a checkid_* request
  $response = $request->answer(true);
  // this will a signed 'openid.sreg.timezone' parameter to the response
  response.addField('sreg', 'timezone', 'America/Los_Angeles')</pre></p><p>Stores</p><p>The OpenID server needs to maintain state between requests in order  to function.  Its mechanism for doing this is called a store.  The  store interface is defined in Interface.php.  Additionally, several  concrete store implementations are provided, so that most sites  won't need to implement a custom store.  For a store backed by flat  files on disk, see <a href="../OpenID/Auth_OpenID_FileStore.html">Auth_OpenID_FileStore</a>.  For stores based  on MySQL, SQLite, or PostgreSQL, see the <a href="../OpenID/Auth_OpenID_SQLStore.html">Auth_OpenID_SQLStore</a> subclasses.</p><p>Upgrading</p><p>The keys by which a server looks up associations in its store have  changed in version 1.2 of this library.  If your store has entries  created from version 1.0 code, you should empty it.</p><p>PHP versions 4 and 5</p><p>LICENSE: See the COPYING file included in this distribution.</p></p>
	<ul class="tags">
				<li><span class="field">author:</span> JanRain, Inc. &lt;<a href="mailto:openid@janrain.com">openid@janrain.com</a>&gt;</li>
				<li><span class="field">copyright:</span> 2005-2008 Janrain, Inc.</li>
				<li><span class="field">license:</span> <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache</a></li>
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			<table cellpadding="2" cellspacing="0" class="class-table">
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					<th class="class-table-header">Class</th>
					<th class="class-table-header">Description</th>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_ServerError.html">Auth_OpenID_ServerError</a>
					</td>
					<td>
											An error class which gets instantiated and returned whenever an  OpenID protocol error occurs.  Be prepared to use this in place of  an ordinary server response.
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				</tr>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_NoReturnToError.html">Auth_OpenID_NoReturnToError</a>
					</td>
					<td>
											Error returned by the server code when a return_to is absent from a  request.
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				</tr>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_MalformedReturnURL.html">Auth_OpenID_MalformedReturnURL</a>
					</td>
					<td>
											An error indicating that the return_to URL is malformed.
										</td>
				</tr>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_MalformedTrustRoot.html">Auth_OpenID_MalformedTrustRoot</a>
					</td>
					<td>
											This error is returned when the trust_root value is malformed.
										</td>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_Request.html">Auth_OpenID_Request</a>
					</td>
					<td>
											The base class for all server request classes.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_CheckAuthRequest.html">Auth_OpenID_CheckAuthRequest</a>
					</td>
					<td>
											A request to verify the validity of a previous response.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_PlainTextServerSession.html">Auth_OpenID_PlainTextServerSession</a>
					</td>
					<td>
											A class implementing plaintext server sessions.
										</td>
				</tr>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_DiffieHellmanSHA1ServerSession.html">Auth_OpenID_DiffieHellmanSHA1ServerSession</a>
					</td>
					<td>
											A class implementing DH-SHA1 server sessions.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_DiffieHellmanSHA256ServerSession.html">Auth_OpenID_DiffieHellmanSHA256ServerSession</a>
					</td>
					<td>
											A class implementing DH-SHA256 server sessions.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_AssociateRequest.html">Auth_OpenID_AssociateRequest</a>
					</td>
					<td>
											A request to associate with the server.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_CheckIDRequest.html">Auth_OpenID_CheckIDRequest</a>
					</td>
					<td>
											A request to confirm the identity of a user.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_ServerResponse.html">Auth_OpenID_ServerResponse</a>
					</td>
					<td>
											This class encapsulates the response to an OpenID server request.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_WebResponse.html">Auth_OpenID_WebResponse</a>
					</td>
					<td>
											A web-capable response object which you can use to generate a  user-agent response.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_Signatory.html">Auth_OpenID_Signatory</a>
					</td>
					<td>
											Responsible for the signature of query data and the verification of  OpenID signature values.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_Encoder.html">Auth_OpenID_Encoder</a>
					</td>
					<td>
											Encode an <a href="../OpenID/Auth_OpenID_ServerResponse.html">Auth_OpenID_ServerResponse</a> to an  <a href="../OpenID/Auth_OpenID_WebResponse.html">Auth_OpenID_WebResponse</a>.
										</td>
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					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_SigningEncoder.html">Auth_OpenID_SigningEncoder</a>
					</td>
					<td>
											An encoder which also takes care of signing fields when required.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_Decoder.html">Auth_OpenID_Decoder</a>
					</td>
					<td>
											Decode an incoming query into an Auth_OpenID_Request.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_EncodingError.html">Auth_OpenID_EncodingError</a>
					</td>
					<td>
											An error that indicates an encoding problem occurred.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_AlreadySigned.html">Auth_OpenID_AlreadySigned</a>
					</td>
					<td>
											An error that indicates that a response was already signed.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_UntrustedReturnURL.html">Auth_OpenID_UntrustedReturnURL</a>
					</td>
					<td>
											An error that indicates that the given return_to is not under the  given trust_root.
										</td>
				</tr>
								<tr>
					<td style="padding-right: 2em; vertical-align: top">
						<a href="../OpenID/Auth_OpenID_Server.html">Auth_OpenID_Server</a>
					</td>
					<td>
											I handle requests for an OpenID server.
										</td>
				</tr>
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			<a name="_Auth/OpenID/KVForm_php"><!-- --></a>
<div class="oddrow">
	
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name">"Auth/OpenID/KVForm.php"</span>)
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			(<span class="include-name"><a href="../OpenID/_Auth---OpenID---ServerRequest.php.html">"Auth/OpenID/ServerRequest.php"</a></span>)
			(line <span class="line-number">102</span>)
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<a name="_Auth/OpenID/DiffieHellman_php"><!-- --></a>
<div class="oddrow">
	
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name">"Auth/OpenID/DiffieHellman.php"</span>)
			(line <span class="line-number">99</span>)
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<a name="_Auth/OpenID_php"><!-- --></a>
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name"><a href="../OpenID/_Auth---OpenID.php.html">"Auth/OpenID.php"</a></span>)
			(line <span class="line-number">95</span>)
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<p class="short-description">Required imports</p>
	
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<a name="_Auth/OpenID/TrustRoot_php"><!-- --></a>
<div class="oddrow">
	
	<div>
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			<span class="include-type">require_once</span>
			(<span class="include-name">"Auth/OpenID/TrustRoot.php"</span>)
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<a name="_Auth/OpenID/Message_php"><!-- --></a>
<div class="evenrow">
	
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name"><a href="../OpenID/_Auth---OpenID---Message.php.html">"Auth/OpenID/Message.php"</a></span>)
			(line <span class="line-number">103</span>)
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<a name="_Auth/OpenID/Nonce_php"><!-- --></a>
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name"><a href="../OpenID/_Auth---OpenID---Nonce.php.html">"Auth/OpenID/Nonce.php"</a></span>)
			(line <span class="line-number">104</span>)
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<a name="_Auth/OpenID/BigMath_php"><!-- --></a>
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name">"Auth/OpenID/BigMath.php"</span>)
			(line <span class="line-number">98</span>)
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<a name="_Auth/OpenID/CryptUtil_php"><!-- --></a>
<div class="oddrow">
	
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			<span class="include-type">require_once</span>
			(<span class="include-name">"Auth/OpenID/CryptUtil.php"</span>)
			(line <span class="line-number">97</span>)
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<a name="_Auth/OpenID/Association_php"><!-- --></a>
<div class="evenrow">
	
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		<span class="include-title">
			<span class="include-type">require_once</span>
			(<span class="include-name"><a href="../OpenID/_Auth---OpenID---Association.php.html">"Auth/OpenID/Association.php"</a></span>)
			(line <span class="line-number">96</span>)
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			<a name="defineAUTH_OPENID_HTTP_ERROR"><!-- --></a>
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		<span class="const-title">
			<span class="const-name">AUTH_OPENID_HTTP_ERROR</span> = 400
			(line <span class="line-number">108</span>)
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<a name="defineAUTH_OPENID_HTTP_OK"><!-- --></a>
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			<span class="const-name">AUTH_OPENID_HTTP_OK</span> = 200
			(line <span class="line-number">106</span>)
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<a name="defineAUTH_OPENID_HTTP_REDIRECT"><!-- --></a>
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		<span class="const-title">
			<span class="const-name">AUTH_OPENID_HTTP_REDIRECT</span> = 302
			(line <span class="line-number">107</span>)
		</span>
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</div>
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	<p class="notes" id="credit">
		Documentation generated on Tue, 21 Apr 2009 11:31:32 -0700 by <a href="http://www.phpdoc.org" target="_blank">phpDocumentor 1.3.2</a>
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