1 <?php

     1 <?php

     2 /**

     2 /**

     4  * for using the new PHP 7 random_* API in PHP 5 projects

     4  * for using the new PHP 7 random_* API in PHP 5 projects

     6  * The MIT License (MIT)

     6  * The MIT License (MIT)

    10  * Permission is hereby granted, free of charge, to any person obtaining a copy

    10  * Permission is hereby granted, free of charge, to any person obtaining a copy

    11  * of this software and associated documentation files (the "Software"), to deal

    11  * of this software and associated documentation files (the "Software"), to deal

    12  * in the Software without restriction, including without limitation the rights

    12  * in the Software without restriction, including without limitation the rights

    13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

    13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

    14  * copies of the Software, and to permit persons to whom the Software is

    14  * copies of the Software, and to permit persons to whom the Software is

    15  * furnished to do so, subject to the following conditions:

    15  * furnished to do so, subject to the following conditions:

    17  * The above copyright notice and this permission notice shall be included in

    17  * The above copyright notice and this permission notice shall be included in

    18  * all copies or substantial portions of the Software.

    18  * all copies or substantial portions of the Software.

    20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

    20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

    21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

    21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

    22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

    22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

    23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

    23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

    24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

    24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

    39      * @return string

    39      * @return string

    40      */

    40      */

    41     function random_bytes($bytes)

    41     function random_bytes($bytes)

    42     {

    42     {

    43         try {

    43         try {

    44             $bytes = RandomCompat_intval($bytes);

    45             $bytes = RandomCompat_intval($bytes);

    45         } catch (TypeError $ex) {

    46         } catch (TypeError $ex) {

    46             throw new TypeError(

    47             throw new TypeError(

    47                 'random_bytes(): $bytes must be an integer'

    48                 'random_bytes(): $bytes must be an integer'

    48             );

    49             );

    52             throw new Error(

    53             throw new Error(

    53                 'Length must be greater than 0'

    54                 'Length must be greater than 0'

    54             );

    55             );

    55         }

    56         }

    56 

    57 

    57         $buf = '';

    59         $buf = '';

    58         if (!class_exists('COM')) {

    60         if (!class_exists('COM')) {

    59             throw new Error(

    61             throw new Error(

    60                 'COM does not exist'

    62                 'COM does not exist'

    61             );

    63             );

    62         }

    64         }

    63         $util = new COM('CAPICOM.Utilities.1');

    66         $util = new COM('CAPICOM.Utilities.1');

    64         $execCount = 0;

    67         $execCount = 0;

    65 

    68 

    66         /**

    69         /**

    67          * Let's not let it loop forever. If we run N times and fail to

    70          * Let's not let it loop forever. If we run N times and fail to

    68          * get N bytes of random data, then CAPICOM has failed us.

    71          * get N bytes of random data, then CAPICOM has failed us.

    69          */

    72          */

    70         do {

    73         do {

    72             if (RandomCompat_strlen($buf) >= $bytes) {

    75             if (RandomCompat_strlen($buf) >= $bytes) {

    73                 /**

    76                 /**

    74                  * Return our random entropy buffer here:

    77                  * Return our random entropy buffer here:

    75                  */

    78                  */

    77             }

    80             }

    78             ++$execCount;

    81             ++$execCount;

    79         } while ($execCount < $bytes);

    82         } while ($execCount < $bytes);

    80 

    83 

    81         /**

    84         /**