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  1. <?php
  2. declare(strict_types=1);
  3. namespace ParagonIE\ConstantTime;
  4.  
  5. /**
  6.  *  Copyright (c) 2016 - 2018 Paragon Initiative Enterprises.
  7.  *  Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com)
  8.  *
  9.  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  10.  *  of this software and associated documentation files (the "Software"), to deal
  11.  *  in the Software without restriction, including without limitation the rights
  12.  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13.  *  copies of the Software, and to permit persons to whom the Software is
  14.  *  furnished to do so, subject to the following conditions:
  15.  *
  16.  *  The above copyright notice and this permission notice shall be included in all
  17.  *  copies or substantial portions of the Software.
  18.  *
  19.  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20.  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21.  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22.  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23.  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24.  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25.  *  SOFTWARE.
  26.  */
  27.  
  28. /**
  29.  * Interface EncoderInterface
  30.  * @package ParagonIE\ConstantTime
  31.  */
  32. interface EncoderInterface
  33. {
  34.     /**
  35.      * Convert a binary string into a hexadecimal string without cache-timing
  36.      * leaks
  37.      *
  38.      * @param string $binString (raw binary)
  39.      * @return string
  40.      */
  41.     public static function encode(string $binString): string;
  42.  
  43.     /**
  44.      * Convert a binary string into a hexadecimal string without cache-timing
  45.      * leaks
  46.      *
  47.      * @param string $encodedString
  48.      * @param bool $strictPadding Error on invalid padding
  49.      * @return string (raw binary)
  50.      */
  51.     public static function decode(string $encodedString, bool $strictPadding = false): string;
  52. }
  53.