1561 lines
52 KiB
PHP
1561 lines
52 KiB
PHP
<?php
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/**
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* @mainpage
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* OAuth 2.0 server in PHP, originally written for
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* <a href="http://www.opendining.net/"> Open Dining</a>. Supports
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* <a href="http://tools.ietf.org/html/draft-ietf-oauth-v2-10">IETF draft v10</a>.
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*
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* Source repo has sample servers implementations for
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* <a href="http://php.net/manual/en/book.pdo.php"> PHP Data Objects</a> and
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* <a href="http://www.mongodb.org/">MongoDB</a>. Easily adaptable to other
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* storage engines.
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*
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* PHP Data Objects supports a variety of databases, including MySQL,
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* Microsoft SQL Server, SQLite, and Oracle, so you can try out the sample
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* to see how it all works.
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*
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* We're expanding the wiki to include more helpful documentation, but for
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* now, your best bet is to view the oauth.php source - it has lots of
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* comments.
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*
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* @author Tim Ridgely <tim.ridgely@gmail.com>
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* @author Aaron Parecki <aaron@parecki.com>
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* @author Edison Wong <hswong3i@pantarei-design.com>
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*
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* @see http://code.google.com/p/oauth2-php/
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*/
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/**
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* The default duration in seconds of the access token lifetime.
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*/
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define("OAUTH2_DEFAULT_ACCESS_TOKEN_LIFETIME", 3600);
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/**
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* The default duration in seconds of the authorization code lifetime.
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*/
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define("OAUTH2_DEFAULT_AUTH_CODE_LIFETIME", 30);
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/**
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* The default duration in seconds of the refresh token lifetime.
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*/
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define("OAUTH2_DEFAULT_REFRESH_TOKEN_LIFETIME", 1209600);
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/**
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* @defgroup oauth2_section_2 Client Credentials
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* @{
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*
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* When interacting with the authorization server, the client identifies
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* itself using a client identifier and authenticates using a set of
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* client credentials. This specification provides one mechanism for
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* authenticating the client using password credentials.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-2
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*/
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/**
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* Regex to filter out the client identifier (described in Section 2 of IETF draft).
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*
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* IETF draft does not prescribe a format for these, however I've arbitrarily
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* chosen alphanumeric strings with hyphens and underscores, 3-32 characters
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* long.
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*
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* Feel free to change.
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*/
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define("OAUTH2_CLIENT_ID_REGEXP", "/^[a-z0-9-_]{3,32}$/i");
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/**
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* @}
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*/
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/**
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* @defgroup oauth2_section_3 Obtaining End-User Authorization
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* @{
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*
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* When the client interacts with an end-user, the end-user MUST first
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* grant the client authorization to access its protected resources.
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* Once obtained, the end-user access grant is expressed as an
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* authorization code which the client uses to obtain an access token.
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* To obtain an end-user authorization, the client sends the end-user to
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* the end-user authorization endpoint.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3
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*/
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/**
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* Denotes "token" authorization response type.
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*/
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define("OAUTH2_AUTH_RESPONSE_TYPE_ACCESS_TOKEN", "token");
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/**
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* Denotes "code" authorization response type.
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*/
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define("OAUTH2_AUTH_RESPONSE_TYPE_AUTH_CODE", "code");
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/**
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* Denotes "code-and-token" authorization response type.
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*/
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define("OAUTH2_AUTH_RESPONSE_TYPE_CODE_AND_TOKEN", "code-and-token");
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/**
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* Regex to filter out the authorization response type.
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*/
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define("OAUTH2_AUTH_RESPONSE_TYPE_REGEXP", "/^(token|code|code-and-token)$/");
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/**
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* @}
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*/
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/**
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* @defgroup oauth2_section_4 Obtaining an Access Token
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* @{
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*
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* The client obtains an access token by authenticating with the
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* authorization server and presenting its access grant (in the form of
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* an authorization code, resource owner credentials, an assertion, or a
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* refresh token).
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4
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*/
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/**
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* Denotes "authorization_code" grant types (for token obtaining).
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*/
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define("OAUTH2_GRANT_TYPE_AUTH_CODE", "authorization_code");
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/**
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* Denotes "password" grant types (for token obtaining).
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*/
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define("OAUTH2_GRANT_TYPE_USER_CREDENTIALS", "password");
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/**
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* Denotes "assertion" grant types (for token obtaining).
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*/
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define("OAUTH2_GRANT_TYPE_ASSERTION", "assertion");
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/**
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* Denotes "refresh_token" grant types (for token obtaining).
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*/
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define("OAUTH2_GRANT_TYPE_REFRESH_TOKEN", "refresh_token");
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/**
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* Denotes "none" grant types (for token obtaining).
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*/
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define("OAUTH2_GRANT_TYPE_NONE", "none");
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/**
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* Regex to filter out the grant type.
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*/
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define("OAUTH2_GRANT_TYPE_REGEXP", "/^(authorization_code|password|assertion|refresh_token|none)$/");
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/**
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* @}
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*/
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/**
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* @defgroup oauth2_section_5 Accessing a Protected Resource
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* @{
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*
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* Clients access protected resources by presenting an access token to
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* the resource server. Access tokens act as bearer tokens, where the
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* token string acts as a shared symmetric secret. This requires
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* treating the access token with the same care as other secrets (e.g.
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* end-user passwords). Access tokens SHOULD NOT be sent in the clear
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* over an insecure channel.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5
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*/
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/**
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* Used to define the name of the OAuth access token parameter (POST/GET/etc.).
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*
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* IETF Draft sections 5.1.2 and 5.1.3 specify that it should be called
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* "oauth_token" but other implementations use things like "access_token".
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*
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* I won't be heartbroken if you change it, but it might be better to adhere
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* to the spec.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.1.2
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.1.3
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*/
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define("OAUTH2_TOKEN_PARAM_NAME", "oauth_token");
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/**
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* @}
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*/
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/**
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* @defgroup oauth2_http_status HTTP status code
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* @{
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*/
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/**
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* "Found" HTTP status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3
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*/
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define("OAUTH2_HTTP_FOUND", "302 Found");
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/**
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* "Bad Request" HTTP status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_HTTP_BAD_REQUEST", "400 Bad Request");
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/**
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* "Unauthorized" HTTP status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_HTTP_UNAUTHORIZED", "401 Unauthorized");
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/**
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* "Forbidden" HTTP status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_HTTP_FORBIDDEN", "403 Forbidden");
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/**
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* @}
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*/
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/**
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* @defgroup oauth2_error Error handling
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* @{
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*
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* @todo Extend for i18n.
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*/
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/**
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* The request is missing a required parameter, includes an unsupported
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* parameter or parameter value, or is otherwise malformed.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_ERROR_INVALID_REQUEST", "invalid_request");
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/**
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* The client identifier provided is invalid.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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*/
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define("OAUTH2_ERROR_INVALID_CLIENT", "invalid_client");
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/**
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* The client is not authorized to use the requested response type.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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*/
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define("OAUTH2_ERROR_UNAUTHORIZED_CLIENT", "unauthorized_client");
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/**
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* The redirection URI provided does not match a pre-registered value.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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*/
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define("OAUTH2_ERROR_REDIRECT_URI_MISMATCH", "redirect_uri_mismatch");
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/**
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* The end-user or authorization server denied the request.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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*/
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define("OAUTH2_ERROR_USER_DENIED", "access_denied");
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/**
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* The requested response type is not supported by the authorization server.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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*/
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define("OAUTH2_ERROR_UNSUPPORTED_RESPONSE_TYPE", "unsupported_response_type");
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/**
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* The requested scope is invalid, unknown, or malformed.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2.1
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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*/
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define("OAUTH2_ERROR_INVALID_SCOPE", "invalid_scope");
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/**
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* The provided access grant is invalid, expired, or revoked (e.g. invalid
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* assertion, expired authorization token, bad end-user password credentials,
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* or mismatching authorization code and redirection URI).
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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*/
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define("OAUTH2_ERROR_INVALID_GRANT", "invalid_grant");
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/**
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* The access grant included - its type or another attribute - is not
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* supported by the authorization server.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3.1
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*/
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define("OAUTH2_ERROR_UNSUPPORTED_GRANT_TYPE", "unsupported_grant_type");
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/**
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* The access token provided is invalid. Resource servers SHOULD use this
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* error code when receiving an expired token which cannot be refreshed to
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* indicate to the client that a new authorization is necessary. The resource
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* server MUST respond with the HTTP 401 (Unauthorized) status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_ERROR_INVALID_TOKEN", "invalid_token");
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/**
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* The access token provided has expired. Resource servers SHOULD only use
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* this error code when the client is expected to be able to handle the
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* response and request a new access token using the refresh token issued
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* with the expired access token. The resource server MUST respond with the
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* HTTP 401 (Unauthorized) status code.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_ERROR_EXPIRED_TOKEN", "expired_token");
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/**
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* The request requires higher privileges than provided by the access token.
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* The resource server SHOULD respond with the HTTP 403 (Forbidden) status
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* code and MAY include the "scope" attribute with the scope necessary to
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* access the protected resource.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2.1
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*/
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define("OAUTH2_ERROR_INSUFFICIENT_SCOPE", "insufficient_scope");
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/**
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* @}
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*/
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/**
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* OAuth2.0 draft v10 server-side implementation.
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*
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* @author Originally written by Tim Ridgely <tim.ridgely@gmail.com>.
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* @author Updated to draft v10 by Aaron Parecki <aaron@parecki.com>.
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* @author Debug, coding style clean up and documented by Edison Wong <hswong3i@pantarei-design.com>.
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*/
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abstract class OAuth2 {
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/**
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* Array of persistent variables stored.
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*/
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protected $conf = array();
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/**
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* Returns a persistent variable.
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*
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* To avoid problems, always use lower case for persistent variable names.
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*
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* @param $name
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* The name of the variable to return.
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* @param $default
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* The default value to use if this variable has never been set.
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*
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* @return
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* The value of the variable.
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*/
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public function getVariable($name, $default = NULL) {
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return isset($this->conf[$name]) ? $this->conf[$name] : $default;
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}
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/**
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* Sets a persistent variable.
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*
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* To avoid problems, always use lower case for persistent variable names.
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*
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* @param $name
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* The name of the variable to set.
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* @param $value
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* The value to set.
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*/
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public function setVariable($name, $value) {
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$this->conf[$name] = $value;
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return $this;
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}
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// Subclasses must implement the following functions.
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/**
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* Make sure that the client credentials is valid.
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*
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* @param $client_id
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* Client identifier to be check with.
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* @param $client_secret
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* (optional) If a secret is required, check that they've given the right one.
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*
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* @return
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* TRUE if client credentials are valid, and MUST return FALSE if invalid.
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*
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* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-2.1
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*
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* @ingroup oauth2_section_2
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*/
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abstract protected function checkClientCredentials($client_id, $client_secret = NULL);
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/**
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* Get the registered redirect URI of corresponding client_id.
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*
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* OAuth says we should store request URIs for each registered client.
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* Implement this function to grab the stored URI for a given client id.
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*
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* @param $client_id
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* Client identifier to be check with.
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*
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* @return
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* Registered redirect URI of corresponding client identifier, and MUST
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* return FALSE if the given client does not exist or is invalid.
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*
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* @ingroup oauth2_section_3
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*/
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abstract protected function getRedirectUri($client_id);
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/**
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* Look up the supplied oauth_token from storage.
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*
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* We need to retrieve access token data as we create and verify tokens.
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*
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* @param $oauth_token
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* oauth_token to be check with.
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*
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* @return
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* An associative array as below, and return NULL if the supplied oauth_token
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* is invalid:
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* - client_id: Stored client identifier.
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* - expires: Stored expiration in unix timestamp.
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* - scope: (optional) Stored scope values in space-separated string.
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*
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* @ingroup oauth2_section_5
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*/
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abstract protected function getAccessToken($oauth_token);
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/**
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* Store the supplied access token values to storage.
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*
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* We need to store access token data as we create and verify tokens.
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*
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* @param $oauth_token
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* oauth_token to be stored.
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* @param $client_id
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* Client identifier to be stored.
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* @param $expires
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* Expiration to be stored.
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* @param $scope
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* (optional) Scopes to be stored in space-separated string.
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*
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* @ingroup oauth2_section_4
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*/
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abstract protected function setAccessToken($oauth_token, $client_id, $expires, $scope = NULL);
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// Stuff that should get overridden by subclasses.
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//
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// I don't want to make these abstract, because then subclasses would have
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// to implement all of them, which is too much work.
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//
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// So they're just stubs. Override the ones you need.
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/**
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* Return supported grant types.
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*
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* You should override this function with something, or else your OAuth
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* provider won't support any grant types!
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*
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* @return
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* A list as below. If you support all grant types, then you'd do:
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* @code
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* return array(
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* OAUTH2_GRANT_TYPE_AUTH_CODE,
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* OAUTH2_GRANT_TYPE_USER_CREDENTIALS,
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* OAUTH2_GRANT_TYPE_ASSERTION,
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* OAUTH2_GRANT_TYPE_REFRESH_TOKEN,
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* OAUTH2_GRANT_TYPE_NONE,
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* );
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* @endcode
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*
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* @ingroup oauth2_section_4
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*/
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protected function getSupportedGrantTypes() {
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return array();
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}
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/**
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* Return supported authorization response types.
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*
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* You should override this function with your supported response types.
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*
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* @return
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* A list as below. If you support all authorization response types,
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* then you'd do:
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* @code
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* return array(
|
|
* OAUTH2_AUTH_RESPONSE_TYPE_AUTH_CODE,
|
|
* OAUTH2_AUTH_RESPONSE_TYPE_ACCESS_TOKEN,
|
|
* OAUTH2_AUTH_RESPONSE_TYPE_CODE_AND_TOKEN,
|
|
* );
|
|
* @endcode
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
protected function getSupportedAuthResponseTypes() {
|
|
return array(
|
|
OAUTH2_AUTH_RESPONSE_TYPE_AUTH_CODE,
|
|
OAUTH2_AUTH_RESPONSE_TYPE_ACCESS_TOKEN,
|
|
OAUTH2_AUTH_RESPONSE_TYPE_CODE_AND_TOKEN
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Return supported scopes.
|
|
*
|
|
* If you want to support scope use, then have this function return a list
|
|
* of all acceptable scopes (used to throw the invalid-scope error).
|
|
*
|
|
* @return
|
|
* A list as below, for example:
|
|
* @code
|
|
* return array(
|
|
* 'my-friends',
|
|
* 'photos',
|
|
* 'whatever-else',
|
|
* );
|
|
* @endcode
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
protected function getSupportedScopes() {
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Check restricted authorization response types of corresponding Client
|
|
* identifier.
|
|
*
|
|
* If you want to restrict clients to certain authorization response types,
|
|
* override this function.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier to be check with.
|
|
* @param $response_type
|
|
* Authorization response type to be check with, would be one of the
|
|
* values contained in OAUTH2_AUTH_RESPONSE_TYPE_REGEXP.
|
|
*
|
|
* @return
|
|
* TRUE if the authorization response type is supported by this
|
|
* client identifier, and FALSE if it isn't.
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
protected function checkRestrictedAuthResponseType($client_id, $response_type) {
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Check restricted grant types of corresponding client identifier.
|
|
*
|
|
* If you want to restrict clients to certain grant types, override this
|
|
* function.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier to be check with.
|
|
* @param $grant_type
|
|
* Grant type to be check with, would be one of the values contained in
|
|
* OAUTH2_GRANT_TYPE_REGEXP.
|
|
*
|
|
* @return
|
|
* TRUE if the grant type is supported by this client identifier, and
|
|
* FALSE if it isn't.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function checkRestrictedGrantType($client_id, $grant_type) {
|
|
return TRUE;
|
|
}
|
|
|
|
// Functions that help grant access tokens for various grant types.
|
|
|
|
/**
|
|
* Fetch authorization code data (probably the most common grant type).
|
|
*
|
|
* Retrieve the stored data for the given authorization code.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_AUTH_CODE.
|
|
*
|
|
* @param $code
|
|
* Authorization code to be check with.
|
|
*
|
|
* @return
|
|
* An associative array as below, and NULL if the code is invalid:
|
|
* - client_id: Stored client identifier.
|
|
* - redirect_uri: Stored redirect URI.
|
|
* - expires: Stored expiration in unix timestamp.
|
|
* - scope: (optional) Stored scope values in space-separated string.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.1.1
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function getAuthCode($code) {
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Take the provided authorization code values and store them somewhere.
|
|
*
|
|
* This function should be the storage counterpart to getAuthCode().
|
|
*
|
|
* If storage fails for some reason, we're not currently checking for
|
|
* any sort of success/failure, so you should bail out of the script
|
|
* and provide a descriptive fail message.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_AUTH_CODE.
|
|
*
|
|
* @param $code
|
|
* Authorization code to be stored.
|
|
* @param $client_id
|
|
* Client identifier to be stored.
|
|
* @param $redirect_uri
|
|
* Redirect URI to be stored.
|
|
* @param $expires
|
|
* Expiration to be stored.
|
|
* @param $scope
|
|
* (optional) Scopes to be stored in space-separated string.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function setAuthCode($code, $client_id, $redirect_uri, $expires, $scope = NULL) {
|
|
}
|
|
|
|
/**
|
|
* Grant access tokens for basic user credentials.
|
|
*
|
|
* Check the supplied username and password for validity.
|
|
*
|
|
* You can also use the $client_id param to do any checks required based
|
|
* on a client, if you need that.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_USER_CREDENTIALS.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier to be check with.
|
|
* @param $username
|
|
* Username to be check with.
|
|
* @param $password
|
|
* Password to be check with.
|
|
*
|
|
* @return
|
|
* TRUE if the username and password are valid, and FALSE if it isn't.
|
|
* Moreover, if the username and password are valid, and you want to
|
|
* verify the scope of a user's access, return an associative array
|
|
* with the scope values as below. We'll check the scope you provide
|
|
* against the requested scope before providing an access token:
|
|
* @code
|
|
* return array(
|
|
* 'scope' => <stored scope values (space-separated string)>,
|
|
* );
|
|
* @endcode
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.1.2
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function checkUserCredentials($client_id, $username, $password) {
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Grant access tokens for assertions.
|
|
*
|
|
* Check the supplied assertion for validity.
|
|
*
|
|
* You can also use the $client_id param to do any checks required based
|
|
* on a client, if you need that.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_ASSERTION.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier to be check with.
|
|
* @param $assertion_type
|
|
* The format of the assertion as defined by the authorization server.
|
|
* @param $assertion
|
|
* The assertion.
|
|
*
|
|
* @return
|
|
* TRUE if the assertion is valid, and FALSE if it isn't. Moreover, if
|
|
* the assertion is valid, and you want to verify the scope of an access
|
|
* request, return an associative array with the scope values as below.
|
|
* We'll check the scope you provide against the requested scope before
|
|
* providing an access token:
|
|
* @code
|
|
* return array(
|
|
* 'scope' => <stored scope values (space-separated string)>,
|
|
* );
|
|
* @endcode
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.1.3
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function checkAssertion($client_id, $assertion_type, $assertion) {
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Grant refresh access tokens.
|
|
*
|
|
* Retrieve the stored data for the given refresh token.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_REFRESH_TOKEN.
|
|
*
|
|
* @param $refresh_token
|
|
* Refresh token to be check with.
|
|
*
|
|
* @return
|
|
* An associative array as below, and NULL if the refresh_token is
|
|
* invalid:
|
|
* - client_id: Stored client identifier.
|
|
* - expires: Stored expiration unix timestamp.
|
|
* - scope: (optional) Stored scope values in space-separated string.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.1.4
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function getRefreshToken($refresh_token) {
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Take the provided refresh token values and store them somewhere.
|
|
*
|
|
* This function should be the storage counterpart to getRefreshToken().
|
|
*
|
|
* If storage fails for some reason, we're not currently checking for
|
|
* any sort of success/failure, so you should bail out of the script
|
|
* and provide a descriptive fail message.
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_REFRESH_TOKEN.
|
|
*
|
|
* @param $refresh_token
|
|
* Refresh token to be stored.
|
|
* @param $client_id
|
|
* Client identifier to be stored.
|
|
* @param $expires
|
|
* expires to be stored.
|
|
* @param $scope
|
|
* (optional) Scopes to be stored in space-separated string.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function setRefreshToken($refresh_token, $client_id, $expires, $scope = NULL) {
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Expire a used refresh token.
|
|
*
|
|
* This is not explicitly required in the spec, but is almost implied.
|
|
* After granting a new refresh token, the old one is no longer useful and
|
|
* so should be forcibly expired in the data store so it can't be used again.
|
|
*
|
|
* If storage fails for some reason, we're not currently checking for
|
|
* any sort of success/failure, so you should bail out of the script
|
|
* and provide a descriptive fail message.
|
|
*
|
|
* @param $refresh_token
|
|
* Refresh token to be expirse.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function unsetRefreshToken($refresh_token) {
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Grant access tokens for the "none" grant type.
|
|
*
|
|
* Not really described in the IETF Draft, so I just left a method
|
|
* stub... Do whatever you want!
|
|
*
|
|
* Required for OAUTH2_GRANT_TYPE_NONE.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function checkNoneAccess($client_id) {
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Get default authentication realm for WWW-Authenticate header.
|
|
*
|
|
* Change this to whatever authentication realm you want to send in a
|
|
* WWW-Authenticate header.
|
|
*
|
|
* @return
|
|
* A string that you want to send in a WWW-Authenticate header.
|
|
*
|
|
* @ingroup oauth2_error
|
|
*/
|
|
protected function getDefaultAuthenticationRealm() {
|
|
return "Service";
|
|
}
|
|
|
|
// End stuff that should get overridden.
|
|
|
|
/**
|
|
* Creates an OAuth2.0 server-side instance.
|
|
*
|
|
* @param $config
|
|
* An associative array as below:
|
|
* - access_token_lifetime: (optional) The lifetime of access token in
|
|
* seconds.
|
|
* - auth_code_lifetime: (optional) The lifetime of authorization code in
|
|
* seconds.
|
|
* - refresh_token_lifetime: (optional) The lifetime of refresh token in
|
|
* seconds.
|
|
* - display_error: (optional) Whether to show verbose error messages in
|
|
* the response.
|
|
*/
|
|
public function __construct($config = array()) {
|
|
foreach ($config as $name => $value) {
|
|
$this->setVariable($name, $value);
|
|
}
|
|
}
|
|
|
|
// Resource protecting (Section 5).
|
|
|
|
/**
|
|
* Check that a valid access token has been provided.
|
|
*
|
|
* The scope parameter defines any required scope that the token must have.
|
|
* If a scope param is provided and the token does not have the required
|
|
* scope, we bounce the request.
|
|
*
|
|
* Some implementations may choose to return a subset of the protected
|
|
* resource (i.e. "public" data) if the user has not provided an access
|
|
* token or if the access token is invalid or expired.
|
|
*
|
|
* The IETF spec says that we should send a 401 Unauthorized header and
|
|
* bail immediately so that's what the defaults are set to.
|
|
*
|
|
* @param $scope
|
|
* A space-separated string of required scope(s), if you want to check
|
|
* for scope.
|
|
* @param $exit_not_present
|
|
* If TRUE and no access token is provided, send a 401 header and exit,
|
|
* otherwise return FALSE.
|
|
* @param $exit_invalid
|
|
* If TRUE and the implementation of getAccessToken() returns NULL, exit,
|
|
* otherwise return FALSE.
|
|
* @param $exit_expired
|
|
* If TRUE and the access token has expired, exit, otherwise return FALSE.
|
|
* @param $exit_scope
|
|
* If TRUE the access token does not have the required scope(s), exit,
|
|
* otherwise return FALSE.
|
|
* @param $realm
|
|
* If you want to specify a particular realm for the WWW-Authenticate
|
|
* header, supply it here.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5
|
|
*
|
|
* @ingroup oauth2_section_5
|
|
*/
|
|
public function verifyAccessToken($scope = NULL, $exit_not_present = TRUE, $exit_invalid = TRUE, $exit_expired = TRUE, $exit_scope = TRUE, $realm = NULL) {
|
|
$token_param = $this->getAccessTokenParams();
|
|
if ($token_param === FALSE) // Access token was not provided
|
|
return $exit_not_present ? $this->errorWWWAuthenticateResponseHeader(OAUTH2_HTTP_BAD_REQUEST, $realm, OAUTH2_ERROR_INVALID_REQUEST, 'The request is missing a required parameter, includes an unsupported parameter or parameter value, repeats the same parameter, uses more than one method for including an access token, or is otherwise malformed.', NULL, $scope) : FALSE;
|
|
// Get the stored token data (from the implementing subclass)
|
|
$token = $this->getAccessToken($token_param);
|
|
if ($token === NULL)
|
|
return $exit_invalid ? $this->errorWWWAuthenticateResponseHeader(OAUTH2_HTTP_UNAUTHORIZED, $realm, OAUTH2_ERROR_INVALID_TOKEN, 'The access token provided is invalid.', NULL, $scope) : FALSE;
|
|
|
|
// Check token expiration (I'm leaving this check separated, later we'll fill in better error messages)
|
|
if (isset($token["expires"]) && time() > $token["expires"])
|
|
return $exit_expired ? $this->errorWWWAuthenticateResponseHeader(OAUTH2_HTTP_UNAUTHORIZED, $realm, OAUTH2_ERROR_EXPIRED_TOKEN, 'The access token provided has expired.', NULL, $scope) : FALSE;
|
|
|
|
// Check scope, if provided
|
|
// If token doesn't have a scope, it's NULL/empty, or it's insufficient, then throw an error
|
|
if ($scope && (!isset($token["scope"]) || !$token["scope"] || !$this->checkScope($scope, $token["scope"])))
|
|
return $exit_scope ? $this->errorWWWAuthenticateResponseHeader(OAUTH2_HTTP_FORBIDDEN, $realm, OAUTH2_ERROR_INSUFFICIENT_SCOPE, 'The request requires higher privileges than provided by the access token.', NULL, $scope) : FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Check if everything in required scope is contained in available scope.
|
|
*
|
|
* @param $required_scope
|
|
* Required scope to be check with.
|
|
* @param $available_scope
|
|
* Available scope to be compare with.
|
|
*
|
|
* @return
|
|
* TRUE if everything in required scope is contained in available scope,
|
|
* and False if it isn't.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5
|
|
*
|
|
* @ingroup oauth2_section_5
|
|
*/
|
|
private function checkScope($required_scope, $available_scope) {
|
|
// The required scope should match or be a subset of the available scope
|
|
if (!is_array($required_scope))
|
|
$required_scope = explode(" ", $required_scope);
|
|
|
|
if (!is_array($available_scope))
|
|
$available_scope = explode(" ", $available_scope);
|
|
|
|
return (count(array_diff($required_scope, $available_scope)) == 0);
|
|
}
|
|
|
|
/**
|
|
* Pulls the access token out of the HTTP request.
|
|
*
|
|
* Either from the Authorization header or GET/POST/etc.
|
|
*
|
|
* @return
|
|
* Access token value if present, and FALSE if it isn't.
|
|
*
|
|
* @todo Support PUT or DELETE.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.1
|
|
*
|
|
* @ingroup oauth2_section_5
|
|
*/
|
|
private function getAccessTokenParams() {
|
|
$auth_header = $this->getAuthorizationHeader();
|
|
|
|
if ($auth_header !== FALSE) {
|
|
// Make sure only the auth header is set
|
|
if (isset($_GET[OAUTH2_TOKEN_PARAM_NAME]) || isset($_POST[OAUTH2_TOKEN_PARAM_NAME]))
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Auth token found in GET or POST when token present in header');
|
|
|
|
$auth_header = trim($auth_header);
|
|
|
|
// Make sure it's Token authorization
|
|
if (strcmp(substr($auth_header, 0, 5), "OAuth ") !== 0)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Auth header found that doesn\'t start with "OAuth"');
|
|
|
|
// Parse the rest of the header
|
|
if (preg_match('/\s*OAuth\s*="(.+)"/', substr($auth_header, 5), $matches) == 0 || count($matches) < 2)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Malformed auth header');
|
|
|
|
return $matches[1];
|
|
}
|
|
|
|
if (isset($_GET[OAUTH2_TOKEN_PARAM_NAME])) {
|
|
if (isset($_POST[OAUTH2_TOKEN_PARAM_NAME])) // Both GET and POST are not allowed
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Only send the token in GET or POST, not both');
|
|
|
|
return $_GET[OAUTH2_TOKEN_PARAM_NAME];
|
|
}
|
|
|
|
if (isset($_POST[OAUTH2_TOKEN_PARAM_NAME]))
|
|
return $_POST[OAUTH2_TOKEN_PARAM_NAME];
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// Access token granting (Section 4).
|
|
|
|
/**
|
|
* Grant or deny a requested access token.
|
|
*
|
|
* This would be called from the "/token" endpoint as defined in the spec.
|
|
* Obviously, you can call your endpoint whatever you want.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
public function grantAccessToken() {
|
|
$filters = array(
|
|
"grant_type" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => OAUTH2_GRANT_TYPE_REGEXP), "flags" => FILTER_REQUIRE_SCALAR),
|
|
"scope" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"code" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"redirect_uri" => array("filter" => FILTER_SANITIZE_URL),
|
|
"username" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"password" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"assertion_type" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"assertion" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"refresh_token" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
);
|
|
|
|
$input = filter_input_array(INPUT_POST, $filters);
|
|
|
|
// Grant Type must be specified.
|
|
if (!$input["grant_type"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Invalid grant_type parameter or parameter missing');
|
|
|
|
// Make sure we've implemented the requested grant type
|
|
if (!in_array($input["grant_type"], $this->getSupportedGrantTypes()))
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_UNSUPPORTED_GRANT_TYPE);
|
|
|
|
// Authorize the client
|
|
$client = $this->getClientCredentials();
|
|
|
|
if ($this->checkClientCredentials($client[0], $client[1]) === FALSE)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_CLIENT);
|
|
|
|
if (!$this->checkRestrictedGrantType($client[0], $input["grant_type"]))
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_UNAUTHORIZED_CLIENT);
|
|
|
|
// Do the granting
|
|
switch ($input["grant_type"]) {
|
|
case OAUTH2_GRANT_TYPE_AUTH_CODE:
|
|
if (!$input["code"] || !$input["redirect_uri"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST);
|
|
|
|
$stored = $this->getAuthCode($input["code"]);
|
|
|
|
// Ensure that the input uri starts with the stored uri
|
|
if ($stored === NULL || (strcasecmp(substr($input["redirect_uri"], 0, strlen($stored["redirect_uri"])), $stored["redirect_uri"]) !== 0) || $client[0] != $stored["client_id"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_GRANT);
|
|
|
|
if ($stored["expires"] < time())
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_EXPIRED_TOKEN);
|
|
|
|
break;
|
|
case OAUTH2_GRANT_TYPE_USER_CREDENTIALS:
|
|
if (!$input["username"] || !$input["password"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'Missing parameters. "username" and "password" required');
|
|
|
|
$stored = $this->checkUserCredentials($client[0], $input["username"], $input["password"]);
|
|
|
|
if ($stored === FALSE)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_GRANT);
|
|
|
|
break;
|
|
case OAUTH2_GRANT_TYPE_ASSERTION:
|
|
if (!$input["assertion_type"] || !$input["assertion"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST);
|
|
|
|
$stored = $this->checkAssertion($client[0], $input["assertion_type"], $input["assertion"]);
|
|
|
|
if ($stored === FALSE)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_GRANT);
|
|
|
|
break;
|
|
case OAUTH2_GRANT_TYPE_REFRESH_TOKEN:
|
|
if (!$input["refresh_token"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST, 'No "refresh_token" parameter found');
|
|
|
|
$stored = $this->getRefreshToken($input["refresh_token"]);
|
|
|
|
if ($stored === NULL || $client[0] != $stored["client_id"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_GRANT);
|
|
|
|
if ($stored["expires"] < time())
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_EXPIRED_TOKEN);
|
|
|
|
// store the refresh token locally so we can delete it when a new refresh token is generated
|
|
$this->setVariable('_old_refresh_token', $stored["token"]);
|
|
|
|
break;
|
|
case OAUTH2_GRANT_TYPE_NONE:
|
|
$stored = $this->checkNoneAccess($client[0]);
|
|
|
|
if ($stored === FALSE)
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_REQUEST);
|
|
}
|
|
|
|
// Check scope, if provided
|
|
if ($input["scope"] && (!is_array($stored) || !isset($stored["scope"]) || !$this->checkScope($input["scope"], $stored["scope"])))
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_SCOPE);
|
|
|
|
if (!$input["scope"])
|
|
$input["scope"] = NULL;
|
|
|
|
$token = $this->createAccessToken($client[0], $input["scope"]);
|
|
|
|
$this->sendJsonHeaders();
|
|
echo json_encode($token);
|
|
}
|
|
|
|
/**
|
|
* Internal function used to get the client credentials from HTTP basic
|
|
* auth or POST data.
|
|
*
|
|
* @return
|
|
* A list containing the client identifier and password, for example
|
|
* @code
|
|
* return array(
|
|
* $_POST["client_id"],
|
|
* $_POST["client_secret"],
|
|
* );
|
|
* @endcode
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-2
|
|
*
|
|
* @ingroup oauth2_section_2
|
|
*/
|
|
protected function getClientCredentials() {
|
|
if (isset($_SERVER["PHP_AUTH_USER"]) && $_POST && isset($_POST["client_id"]))
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_CLIENT);
|
|
|
|
// Try basic auth
|
|
if (isset($_SERVER["PHP_AUTH_USER"]))
|
|
return array($_SERVER["PHP_AUTH_USER"], $_SERVER["PHP_AUTH_PW"]);
|
|
|
|
// Try POST
|
|
if ($_POST && isset($_POST["client_id"])) {
|
|
if (isset($_POST["client_secret"]))
|
|
return array($_POST["client_id"], $_POST["client_secret"]);
|
|
|
|
return array($_POST["client_id"], NULL);
|
|
}
|
|
|
|
// No credentials were specified
|
|
$this->errorJsonResponse(OAUTH2_HTTP_BAD_REQUEST, OAUTH2_ERROR_INVALID_CLIENT);
|
|
}
|
|
|
|
// End-user/client Authorization (Section 3 of IETF Draft).
|
|
|
|
/**
|
|
* Pull the authorization request data out of the HTTP request.
|
|
*
|
|
* @return
|
|
* The authorization parameters so the authorization server can prompt
|
|
* the user for approval if valid.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
public function getAuthorizeParams() {
|
|
$filters = array(
|
|
"client_id" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => OAUTH2_CLIENT_ID_REGEXP), "flags" => FILTER_REQUIRE_SCALAR),
|
|
"response_type" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => OAUTH2_AUTH_RESPONSE_TYPE_REGEXP), "flags" => FILTER_REQUIRE_SCALAR),
|
|
"redirect_uri" => array("filter" => FILTER_SANITIZE_URL),
|
|
"state" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
"scope" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
);
|
|
|
|
$input = filter_input_array(INPUT_GET, $filters);
|
|
|
|
// Make sure a valid client id was supplied
|
|
if (!$input["client_id"]) {
|
|
if ($input["redirect_uri"])
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_INVALID_CLIENT, NULL, NULL, $input["state"]);
|
|
|
|
$this->errorJsonResponse(OAUTH2_HTTP_FOUND, OAUTH2_ERROR_INVALID_CLIENT); // We don't have a good URI to use
|
|
}
|
|
|
|
// redirect_uri is not required if already established via other channels
|
|
// check an existing redirect URI against the one supplied
|
|
$redirect_uri = $this->getRedirectUri($input["client_id"]);
|
|
|
|
// At least one of: existing redirect URI or input redirect URI must be specified
|
|
if (!$redirect_uri && !$input["redirect_uri"])
|
|
$this->errorJsonResponse(OAUTH2_HTTP_FOUND, OAUTH2_ERROR_INVALID_REQUEST);
|
|
|
|
// getRedirectUri() should return FALSE if the given client ID is invalid
|
|
// this probably saves us from making a separate db call, and simplifies the method set
|
|
if ($redirect_uri === FALSE)
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_INVALID_CLIENT, NULL, NULL, $input["state"]);
|
|
|
|
// If there's an existing uri and one from input, verify that they match
|
|
if ($redirect_uri && $input["redirect_uri"]) {
|
|
// Ensure that the input uri starts with the stored uri
|
|
if (strcasecmp(substr($input["redirect_uri"], 0, strlen($redirect_uri)), $redirect_uri) !== 0)
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_REDIRECT_URI_MISMATCH, NULL, NULL, $input["state"]);
|
|
}
|
|
elseif ($redirect_uri) { // They did not provide a uri from input, so use the stored one
|
|
$input["redirect_uri"] = $redirect_uri;
|
|
}
|
|
|
|
// type and client_id are required
|
|
if (!$input["response_type"])
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_INVALID_REQUEST, 'Invalid response type.', NULL, $input["state"]);
|
|
|
|
// Check requested auth response type against the list of supported types
|
|
if (array_search($input["response_type"], $this->getSupportedAuthResponseTypes()) === FALSE)
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_UNSUPPORTED_RESPONSE_TYPE, NULL, NULL, $input["state"]);
|
|
|
|
// Restrict clients to certain authorization response types
|
|
if ($this->checkRestrictedAuthResponseType($input["client_id"], $input["response_type"]) === FALSE)
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_UNAUTHORIZED_CLIENT, NULL, NULL, $input["state"]);
|
|
|
|
// Validate that the requested scope is supported
|
|
if ($input["scope"] && !$this->checkScope($input["scope"], $this->getSupportedScopes()))
|
|
$this->errorDoRedirectUriCallback($input["redirect_uri"], OAUTH2_ERROR_INVALID_SCOPE, NULL, NULL, $input["state"]);
|
|
|
|
return $input;
|
|
}
|
|
|
|
/**
|
|
* Redirect the user appropriately after approval.
|
|
*
|
|
* After the user has approved or denied the access request the
|
|
* authorization server should call this function to redirect the user
|
|
* appropriately.
|
|
*
|
|
* @param $is_authorized
|
|
* TRUE or FALSE depending on whether the user authorized the access.
|
|
* @param $params
|
|
* An associative array as below:
|
|
* - response_type: The requested response: an access token, an
|
|
* authorization code, or both.
|
|
* - client_id: The client identifier as described in Section 2.
|
|
* - redirect_uri: An absolute URI to which the authorization server
|
|
* will redirect the user-agent to when the end-user authorization
|
|
* step is completed.
|
|
* - scope: (optional) The scope of the access request expressed as a
|
|
* list of space-delimited strings.
|
|
* - state: (optional) An opaque value used by the client to maintain
|
|
* state between the request and callback.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
public function finishClientAuthorization($is_authorized, $params = array()) {
|
|
$params += array(
|
|
'scope' => NULL,
|
|
'state' => NULL,
|
|
);
|
|
extract($params);
|
|
|
|
if ($state !== NULL)
|
|
$result["query"]["state"] = $state;
|
|
|
|
if ($is_authorized === FALSE) {
|
|
$result["query"]["error"] = OAUTH2_ERROR_USER_DENIED;
|
|
}
|
|
else {
|
|
if ($response_type == OAUTH2_AUTH_RESPONSE_TYPE_AUTH_CODE || $response_type == OAUTH2_AUTH_RESPONSE_TYPE_CODE_AND_TOKEN)
|
|
$result["query"]["code"] = $this->createAuthCode($client_id, $redirect_uri, $scope);
|
|
|
|
if ($response_type == OAUTH2_AUTH_RESPONSE_TYPE_ACCESS_TOKEN || $response_type == OAUTH2_AUTH_RESPONSE_TYPE_CODE_AND_TOKEN)
|
|
$result["fragment"] = $this->createAccessToken($client_id, $scope);
|
|
}
|
|
|
|
$this->doRedirectUriCallback($redirect_uri, $result);
|
|
}
|
|
|
|
// Other/utility functions.
|
|
|
|
/**
|
|
* Redirect the user agent.
|
|
*
|
|
* Handle both redirect for success or error response.
|
|
*
|
|
* @param $redirect_uri
|
|
* An absolute URI to which the authorization server will redirect
|
|
* the user-agent to when the end-user authorization step is completed.
|
|
* @param $params
|
|
* Parameters to be pass though buildUri().
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
private function doRedirectUriCallback($redirect_uri, $params) {
|
|
header("HTTP/1.1 ". OAUTH2_HTTP_FOUND);
|
|
header("Location: " . $this->buildUri($redirect_uri, $params));
|
|
exit;
|
|
}
|
|
|
|
/**
|
|
* Build the absolute URI based on supplied URI and parameters.
|
|
*
|
|
* @param $uri
|
|
* An absolute URI.
|
|
* @param $params
|
|
* Parameters to be append as GET.
|
|
*
|
|
* @return
|
|
* An absolute URI with supplied parameters.
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
private function buildUri($uri, $params) {
|
|
$parse_url = parse_url($uri);
|
|
|
|
// Add our params to the parsed uri
|
|
foreach ($params as $k => $v) {
|
|
if (isset($parse_url[$k]))
|
|
$parse_url[$k] .= "&" . http_build_query($v);
|
|
else
|
|
$parse_url[$k] = http_build_query($v);
|
|
}
|
|
|
|
// Put humpty dumpty back together
|
|
return
|
|
((isset($parse_url["scheme"])) ? $parse_url["scheme"] . "://" : "")
|
|
. ((isset($parse_url["user"])) ? $parse_url["user"] . ((isset($parse_url["pass"])) ? ":" . $parse_url["pass"] : "") . "@" : "")
|
|
. ((isset($parse_url["host"])) ? $parse_url["host"] : "")
|
|
. ((isset($parse_url["port"])) ? ":" . $parse_url["port"] : "")
|
|
. ((isset($parse_url["path"])) ? $parse_url["path"] : "")
|
|
. ((isset($parse_url["query"])) ? "?" . $parse_url["query"] : "")
|
|
. ((isset($parse_url["fragment"])) ? "#" . $parse_url["fragment"] : "");
|
|
}
|
|
|
|
/**
|
|
* Handle the creation of access token, also issue refresh token if support.
|
|
*
|
|
* This belongs in a separate factory, but to keep it simple, I'm just
|
|
* keeping it here.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier related to the access token.
|
|
* @param $scope
|
|
* (optional) Scopes to be stored in space-separated string.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function createAccessToken($client_id, $scope = NULL) {
|
|
$token = array(
|
|
"access_token" => $this->genAccessToken(),
|
|
"expires_in" => $this->getVariable('access_token_lifetime', OAUTH2_DEFAULT_ACCESS_TOKEN_LIFETIME),
|
|
"scope" => $scope
|
|
);
|
|
|
|
$this->setAccessToken($token["access_token"], $client_id, time() + $this->getVariable('access_token_lifetime', OAUTH2_DEFAULT_ACCESS_TOKEN_LIFETIME), $scope);
|
|
|
|
// Issue a refresh token also, if we support them
|
|
if (in_array(OAUTH2_GRANT_TYPE_REFRESH_TOKEN, $this->getSupportedGrantTypes())) {
|
|
$token["refresh_token"] = $this->genAccessToken();
|
|
$this->setRefreshToken($token["refresh_token"], $client_id, time() + $this->getVariable('refresh_token_lifetime', OAUTH2_DEFAULT_REFRESH_TOKEN_LIFETIME), $scope);
|
|
// If we've granted a new refresh token, expire the old one
|
|
if ($this->getVariable('_old_refresh_token'))
|
|
$this->unsetRefreshToken($this->getVariable('_old_refresh_token'));
|
|
}
|
|
|
|
return $token;
|
|
}
|
|
|
|
/**
|
|
* Handle the creation of auth code.
|
|
*
|
|
* This belongs in a separate factory, but to keep it simple, I'm just
|
|
* keeping it here.
|
|
*
|
|
* @param $client_id
|
|
* Client identifier related to the access token.
|
|
* @param $redirect_uri
|
|
* An absolute URI to which the authorization server will redirect the
|
|
* user-agent to when the end-user authorization step is completed.
|
|
* @param $scope
|
|
* (optional) Scopes to be stored in space-separated string.
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
private function createAuthCode($client_id, $redirect_uri, $scope = NULL) {
|
|
$code = $this->genAuthCode();
|
|
$this->setAuthCode($code, $client_id, $redirect_uri, time() + $this->getVariable('auth_code_lifetime', OAUTH2_DEFAULT_AUTH_CODE_LIFETIME), $scope);
|
|
return $code;
|
|
}
|
|
|
|
/**
|
|
* Generate unique access token.
|
|
*
|
|
* Implementing classes may want to override these function to implement
|
|
* other access token or auth code generation schemes.
|
|
*
|
|
* @return
|
|
* An unique access token.
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
protected function genAccessToken() {
|
|
return md5(base64_encode(pack('N6', mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand(), uniqid())));
|
|
}
|
|
|
|
/**
|
|
* Generate unique auth code.
|
|
*
|
|
* Implementing classes may want to override these function to implement
|
|
* other access token or auth code generation schemes.
|
|
*
|
|
* @return
|
|
* An unique auth code.
|
|
*
|
|
* @ingroup oauth2_section_3
|
|
*/
|
|
protected function genAuthCode() {
|
|
return md5(base64_encode(pack('N6', mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand(), uniqid())));
|
|
}
|
|
|
|
/**
|
|
* Pull out the Authorization HTTP header and return it.
|
|
*
|
|
* Implementing classes may need to override this function for use on
|
|
* non-Apache web servers.
|
|
*
|
|
* @return
|
|
* The Authorization HTTP header, and FALSE if does not exist.
|
|
*
|
|
* @todo Handle Authorization HTTP header for non-Apache web servers.
|
|
*
|
|
* @ingroup oauth2_section_5
|
|
*/
|
|
private function getAuthorizationHeader() {
|
|
if (array_key_exists("HTTP_AUTHORIZATION", $_SERVER))
|
|
return $_SERVER["HTTP_AUTHORIZATION"];
|
|
|
|
if (function_exists("apache_request_headers")) {
|
|
$headers = apache_request_headers();
|
|
|
|
if (array_key_exists("Authorization", $headers))
|
|
return $headers["Authorization"];
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Send out HTTP headers for JSON.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.2
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3
|
|
*
|
|
* @ingroup oauth2_section_4
|
|
*/
|
|
private function sendJsonHeaders() {
|
|
header("Content-Type: application/json");
|
|
header("Cache-Control: no-store");
|
|
}
|
|
|
|
/**
|
|
* Redirect the end-user's user agent with error message.
|
|
*
|
|
* @param $redirect_uri
|
|
* An absolute URI to which the authorization server will redirect the
|
|
* user-agent to when the end-user authorization step is completed.
|
|
* @param $error
|
|
* A single error code as described in Section 3.2.1.
|
|
* @param $error_description
|
|
* (optional) A human-readable text providing additional information,
|
|
* used to assist in the understanding and resolution of the error
|
|
* occurred.
|
|
* @param $error_uri
|
|
* (optional) A URI identifying a human-readable web page with
|
|
* information about the error, used to provide the end-user with
|
|
* additional information about the error.
|
|
* @param $state
|
|
* (optional) REQUIRED if the "state" parameter was present in the client
|
|
* authorization request. Set to the exact value received from the client.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-3.2
|
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*
|
|
* @ingroup oauth2_error
|
|
*/
|
|
private function errorDoRedirectUriCallback($redirect_uri, $error, $error_description = NULL, $error_uri = NULL, $state = NULL) {
|
|
$result["query"]["error"] = $error;
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|
|
|
if ($state)
|
|
$result["query"]["state"] = $state;
|
|
|
|
if ($this->getVariable('display_error') && $error_description)
|
|
$result["query"]["error_description"] = $error_description;
|
|
|
|
if ($this->getVariable('display_error') && $error_uri)
|
|
$result["query"]["error_uri"] = $error_uri;
|
|
|
|
$this->doRedirectUriCallback($redirect_uri, $result);
|
|
}
|
|
|
|
/**
|
|
* Send out error message in JSON.
|
|
*
|
|
* @param $http_status_code
|
|
* HTTP status code message as predefined.
|
|
* @param $error
|
|
* A single error code.
|
|
* @param $error_description
|
|
* (optional) A human-readable text providing additional information,
|
|
* used to assist in the understanding and resolution of the error
|
|
* occurred.
|
|
* @param $error_uri
|
|
* (optional) A URI identifying a human-readable web page with
|
|
* information about the error, used to provide the end-user with
|
|
* additional information about the error.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-4.3
|
|
*
|
|
* @ingroup oauth2_error
|
|
*/
|
|
private function errorJsonResponse($http_status_code, $error, $error_description = NULL, $error_uri = NULL) {
|
|
$result['error'] = $error;
|
|
|
|
if ($this->getVariable('display_error') && $error_description)
|
|
$result["error_description"] = $error_description;
|
|
|
|
if ($this->getVariable('display_error') && $error_uri)
|
|
$result["error_uri"] = $error_uri;
|
|
|
|
header("HTTP/1.1 " . $http_status_code);
|
|
$this->sendJsonHeaders();
|
|
echo json_encode($result);
|
|
|
|
exit;
|
|
}
|
|
|
|
/**
|
|
* Send a 401 unauthorized header with the given realm and an error, if
|
|
* provided.
|
|
*
|
|
* @param $http_status_code
|
|
* HTTP status code message as predefined.
|
|
* @param $realm
|
|
* The "realm" attribute is used to provide the protected resources
|
|
* partition as defined by [RFC2617].
|
|
* @param $scope
|
|
* A space-delimited list of scope values indicating the required scope
|
|
* of the access token for accessing the requested resource.
|
|
* @param $error
|
|
* The "error" attribute is used to provide the client with the reason
|
|
* why the access request was declined.
|
|
* @param $error_description
|
|
* (optional) The "error_description" attribute provides a human-readable text
|
|
* containing additional information, used to assist in the understanding
|
|
* and resolution of the error occurred.
|
|
* @param $error_uri
|
|
* (optional) The "error_uri" attribute provides a URI identifying a human-readable
|
|
* web page with information about the error, used to offer the end-user
|
|
* with additional information about the error. If the value is not an
|
|
* absolute URI, it is relative to the URI of the requested protected
|
|
* resource.
|
|
*
|
|
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2
|
|
*
|
|
* @ingroup oauth2_error
|
|
*/
|
|
private function errorWWWAuthenticateResponseHeader($http_status_code, $realm, $error, $error_description = NULL, $error_uri = NULL, $scope = NULL) {
|
|
$realm = $realm === NULL ? $this->getDefaultAuthenticationRealm() : $realm;
|
|
|
|
$result = "WWW-Authenticate: OAuth realm='" . $realm . "'";
|
|
|
|
if ($error)
|
|
$result .= ", error='" . $error . "'";
|
|
|
|
if ($this->getVariable('display_error') && $error_description)
|
|
$result .= ", error_description='" . $error_description . "'";
|
|
|
|
if ($this->getVariable('display_error') && $error_uri)
|
|
$result .= ", error_uri='" . $error_uri . "'";
|
|
|
|
if ($scope)
|
|
$result .= ", scope='" . $scope . "'";
|
|
|
|
header("HTTP/1.1 ". $http_status_code);
|
|
header($result);
|
|
|
|
exit;
|
|
}
|
|
}
|