62 lines
1.8 KiB
PHP
62 lines
1.8 KiB
PHP
<?php defined('BASEPATH') or exit('No direct script access allowed');
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/* ----------------------------------------------------------------------------
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* Easy!Appointments - Online Appointment Scheduler
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*
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* @package EasyAppointments
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* @author A.Tselegidis <alextselegidis@gmail.com>
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* @copyright Copyright (c) Alex Tselegidis
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* @license https://opensource.org/licenses/GPL-3.0 - GPLv3
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* @link https://easyappointments.org
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* @since v1.0.0
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* ---------------------------------------------------------------------------- */
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/**
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* Generate a hash of password string.
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*
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* For user security, all system passwords are stored in hash string into the database. Use this method to produce the
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* hashed password.
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*
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* @param string $salt Salt value for current user. This value is stored on the database and is used when generating
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* the password hashes.
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* @param string $password Given string password.
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*
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* @return string Returns the hash string of the given password.
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*
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* @throws Exception
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*/
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function hash_password(string $salt, string $password): string
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{
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if (strlen($password) > MAX_PASSWORD_LENGTH)
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{
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throw new InvalidArgumentException('The provided password is too long, please use a shorter value.');
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}
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$half = (int)(strlen($salt) / 2);
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$hash = hash('sha256', substr($salt, 0, $half) . $password . substr($salt, $half));
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for ($i = 0; $i < 100000; $i++)
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{
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$hash = hash('sha256', $hash);
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}
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return $hash;
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}
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/**
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* Generate a new password salt.
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*
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* This method will not check if the salt is unique in database. This must be done
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* from the calling procedure.
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*
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* @return string Returns a salt string.
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*/
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function generate_salt(): string
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{
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$max_length = 100;
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$salt = hash('sha256', (uniqid(rand(), TRUE)));
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return substr($salt, 0, $max_length);
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}
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