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<?php |
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/** |
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* Copyright 2015 François Kooman <[email protected]>. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace fkooman\RemoteStorage\Base64; |
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use InvalidArgumentException; |
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class Base64Url extends Base64 |
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{ |
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/** |
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* Encode to base64url. |
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* |
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* @param string $data the data to encode |
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* |
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* @return string the encoded data |
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*/ |
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public static function encode($data) |
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{ |
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if (!is_string($data)) { |
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throw new InvalidArgumentException('data must be string'); |
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} |
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$encodedData = parent::encode($data); |
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// URL safe replacement and remove padding |
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return rtrim(strtr($encodedData, '+/', '-_'), '='); |
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} |
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/** |
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* Decode base64url. |
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* |
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* @param string $data the data to decode |
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* |
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* @return string the decoded data |
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*/ |
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public static function decode($data) |
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{ |
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if (!is_string($data)) { |
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throw new InvalidArgumentException('data must be string'); |
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} |
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// undo the URL safe replacement |
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$convertedData = strtr($data, '-_', '+/'); |
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// restore the padding |
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switch (strlen($convertedData) % 4) { |
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case 0: |
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break; |
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case 2: |
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$convertedData .= '=='; |
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break; |
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case 3: |
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$convertedData .= '='; |
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break; |
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default: |
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throw new InvalidArgumentException('invalid base64url string length'); |
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} |
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return parent::decode($convertedData); |
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} |
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} |
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fkooman /
php-remote-storage
