62 lines
2.0 KiB
PHP
62 lines
2.0 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2019 (original work) Open Assessment Technologies SA;
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*/
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namespace oat\taoLti\models\classes\Lis;
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use common_http_InvalidSignatureException;
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use IMSGlobal\LTI\OAuth\OAuthConsumer;
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use IMSGlobal\LTI\OAuth\OAuthRequest;
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use IMSGlobal\LTI\OAuth\OAuthSignatureMethod_HMAC_SHA1;
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class LisSignatureValidator
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{
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/**
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* @param OAuthRequest $oauthRequest
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* @param OAuthConsumer $oauthConsumer
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* @param string $method
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* @param string $url
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*
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* @return array
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* @throws common_http_InvalidSignatureException
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*/
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public function validate(OAuthRequest $oauthRequest, OAuthConsumer $oauthConsumer, $method, $url)
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{
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$hmacMethod = new OAuthSignatureMethod_HMAC_SHA1();
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$oauthReq = OAuthRequest::from_consumer_and_token(
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$oauthConsumer,
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null,
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$method,
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$url,
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$oauthRequest->get_parameters()
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);
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$oauthReq->sign_request($hmacMethod, $oauthConsumer, null);
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if ($oauthRequest->get_parameter('oauth_signature') !== $oauthReq->get_parameter('oauth_signature')) {
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throw new common_http_InvalidSignatureException('Invalid signature.');
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}
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return $oauthReq->get_parameters();
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}
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}
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