59 lines
2.0 KiB
PHP
59 lines
2.0 KiB
PHP
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<?php
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/**
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* Copyright 2017 Facebook, Inc.
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*
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* You are hereby granted a non-exclusive, worldwide, royalty-free license to
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* use, copy, modify, and distribute this software in source code or binary
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* form for use in connection with the web services and APIs provided by
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* Facebook.
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*
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* As with any software that integrates with the Facebook platform, your use
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* of this software is subject to the Facebook Developer Principles and
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* Policies [http://developers.facebook.com/policy/]. This copyright notice
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* shall be included in all copies or substantial portions of the software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Facebook\PseudoRandomString;
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trait PseudoRandomStringGeneratorTrait
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{
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/**
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* Validates the length argument of a random string.
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*
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* @param int $length The length to validate.
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*
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* @throws \InvalidArgumentException
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*/
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public function validateLength($length)
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{
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if (!is_int($length)) {
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throw new \InvalidArgumentException('getPseudoRandomString() expects an integer for the string length');
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}
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if ($length < 1) {
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throw new \InvalidArgumentException('getPseudoRandomString() expects a length greater than 1');
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}
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}
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/**
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* Converts binary data to hexadecimal of arbitrary length.
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*
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* @param string $binaryData The binary data to convert to hex.
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* @param int $length The length of the string to return.
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*
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* @return string
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*/
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public function binToHex($binaryData, $length)
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{
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return \substr(\bin2hex($binaryData), 0, $length);
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}
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}
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