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<?php |
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/** |
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* Sasl library. |
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* |
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* Copyright (c) 2002-2003 Richard Heyes, |
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* 2014-2023 Fabian Grutschus |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* o Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* o Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution.| |
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* o The names of the authors may not be used to endorse or promote |
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* products derived from this software without specific prior written |
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* permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* @author Richard Heyes <[email protected]> |
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*/ |
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namespace Fabiang\Sasl; |
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use Fabiang\Sasl\Exception\InvalidArgumentException; |
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use Fabiang\Sasl\Options\DowngradeProtectionOptions; |
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/** |
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* Client implementation of various SASL mechanisms |
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* |
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* @author Richard Heyes <[email protected]> |
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*/ |
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class Sasl |
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{ |
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/** |
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* Known authentication mechanisms classes. |
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* |
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* @var array |
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*/ |
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protected $mechanisms = array( |
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'anonymous' => 'Fabiang\\Sasl\Authentication\\Anonymous', |
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'login' => 'Fabiang\\Sasl\Authentication\\Login', |
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'plain' => 'Fabiang\\Sasl\Authentication\\Plain', |
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'external' => 'Fabiang\\Sasl\Authentication\\External', |
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'crammd5' => 'Fabiang\\Sasl\Authentication\\CramMD5', |
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'digestmd5' => 'Fabiang\\Sasl\Authentication\\DigestMD5', |
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); |
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/** |
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* Factory class. Returns an object of the request |
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* type. |
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* |
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* @param string $type One of: Anonymous |
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* Plain |
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* CramMD5 |
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* DigestMD5 |
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* SCRAM-* (any mechanism of the SCRAM family) |
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* Types are not case sensitive |
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* @param Options|array Options for authentication |
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* @return \Fabiang\Sasl\Authentication\AuthenticationInterface |
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*/ |
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public function factory($type, $options = array()) |
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{ |
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$className = null; |
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$parameter = null; |
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$matches = array(); |
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$options = $this->createOptionsObject($options); |
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$formatedType = strtolower(str_replace('-', '', $type)); |
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if (isset($this->mechanisms[$formatedType])) { |
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$className = $this->mechanisms[$formatedType]; |
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} elseif (preg_match('/^scram(?<algo>.{1,9})$/i', $formatedType, $matches)) { |
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$className = 'Fabiang\\Sasl\Authentication\\SCRAM'; |
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$parameter = $matches['algo']; |
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} |
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if (null === $className) { |
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throw new InvalidArgumentException("Invalid SASL mechanism type '$type'"); |
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} |
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return new $className($options, $parameter); |
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} |
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/** |
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* @param Options|array $options |
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* @return \Fabiang\Sasl\Options |
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* @throws InvalidArgumentException |
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*/ |
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private function createOptionsObject($options) |
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{ |
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$optionsObject = $options; |
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if (is_array($options)) { |
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$downgradeProtectOptions = null; |
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if (isset($options['downgrade_protection'])) { |
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$dpo = $options['downgrade_protection']; |
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$allowedMechanisms = isset($dpo['allowed_mechanisms']) ? $dpo['allowed_mechanisms'] : array(); |
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$allowedChannelBindings = isset($dpo['allowed_channel_bindings']) ? |
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$dpo['allowed_channel_bindings'] : array(); |
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$downgradeProtectOptions = new DowngradeProtectionOptions($allowedMechanisms, $allowedChannelBindings); |
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} |
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$optionsObject = new Options( |
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$this->checkEmpty($options, 'authcid'), |
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$this->checkEmpty($options, 'secret'), |
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$this->checkEmpty($options, 'authzid'), |
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$this->checkEmpty($options, 'service'), |
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$this->checkEmpty($options, 'hostname'), |
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$downgradeProtectOptions |
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); |
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} |
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if (!($optionsObject instanceof Options)) { |
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throw new InvalidArgumentException( |
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'Invalid options passed. Argument must be either of type "Fabiang\Sasl\Options" or "array", "' |
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. (is_object($options) ? get_class($options) : gettype($options)) |
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. '" given.' |
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); |
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} |
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return $optionsObject; |
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} |
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2 |
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/** |
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* @param array $array |
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* @param string $key |
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* @return mixed |
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*/ |
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private function checkEmpty(array $array, $key) |
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{ |
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if (isset($array[$key])) { |
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return $array[$key]; |
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} |
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return null; |
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} |
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} |
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fabiang /
sasl
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