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random_bytes_com_dotnet.php 0000666 00000005705 15165103463 0012175 0 ustar 00 <?php /** * Random_* Compatibility Library * for using the new PHP 7 random_* API in PHP 5 projects * * The MIT License (MIT) * * Copyright (c) 2015 - 2018 Paragon Initiative Enterprises * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ if (!is_callable('random_bytes')) { /** * Windows with PHP < 5.3.0 will not have the function * openssl_random_pseudo_bytes() available, so let's use * CAPICOM to work around this deficiency. * * @param int $bytes * * @throws Exception * * @return string */ function random_bytes($bytes) { try { /** @var int $bytes */ $bytes = RandomCompat_intval($bytes); } catch (TypeError $ex) { throw new TypeError( 'random_bytes(): $bytes must be an integer' ); } if ($bytes < 1) { throw new Error( 'Length must be greater than 0' ); } /** @var string $buf */ $buf = ''; if (!class_exists('COM')) { throw new Error( 'COM does not exist' ); } /** @var COM $util */ $util = new COM('CAPICOM.Utilities.1'); $execCount = 0; /** * Let's not let it loop forever. If we run N times and fail to * get N bytes of random data, then CAPICOM has failed us. */ do { $buf .= base64_decode((string) $util->GetRandom($bytes, 0)); if (RandomCompat_strlen($buf) >= $bytes) { /** * Return our random entropy buffer here: */ return (string) RandomCompat_substr($buf, 0, $bytes); } ++$execCount; } while ($execCount < $bytes); /** * If we reach here, PHP has failed us. */ throw new Exception( 'Could not gather sufficient random data' ); } } cast_to_int.php 0000666 00000005237 15165103463 0007602 0 ustar 00 <?php /** * Random_* Compatibility Library * for using the new PHP 7 random_* API in PHP 5 projects * * The MIT License (MIT) * * Copyright (c) 2015 - 2018 Paragon Initiative Enterprises * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ if (!is_callable('RandomCompat_intval')) { /** * Cast to an integer if we can, safely. * * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX) * (non-inclusive), it will sanely cast it to an int. If you it's equal to * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats * lose precision, so the <= and => operators might accidentally let a float * through. * * @param int|float $number The number we want to convert to an int * @param bool $fail_open Set to true to not throw an exception * * @return float|int * @psalm-suppress InvalidReturnType * * @throws TypeError */ function RandomCompat_intval($number, $fail_open = false) { if (is_int($number) || is_float($number)) { $number += 0; } elseif (is_numeric($number)) { /** @psalm-suppress InvalidOperand */ $number += 0; } /** @var int|float $number */ if ( is_float($number) && $number > ~PHP_INT_MAX && $number < PHP_INT_MAX ) { $number = (int) $number; } if (is_int($number)) { return (int) $number; } elseif (!$fail_open) { throw new TypeError( 'Expected an integer.' ); } return $number; } } random_bytes_libsodium_legacy.php 0000666 00000005554 15165103463 0013357 0 ustar 00 <?php /** * Random_* Compatibility Library * for using the new PHP 7 random_* API in PHP 5 projects * * The MIT License (MIT) * * Copyright (c) 2015 - 2018 Paragon Initiative Enterprises * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ if (!is_callable('random_bytes')) { /** * If the libsodium PHP extension is loaded, we'll use it above any other * solution. * * libsodium-php project: * @ref https://github.com/jedisct1/libsodium-php * * @param int $bytes * * @throws Exception * * @return string */ function random_bytes($bytes) { try { /** @var int $bytes */ $bytes = RandomCompat_intval($bytes); } catch (TypeError $ex) { throw new TypeError( 'random_bytes(): $bytes must be an integer' ); } if ($bytes < 1) { throw new Error( 'Length must be greater than 0' ); } /** * @var string */ $buf = ''; /** * \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be * generated in one invocation. */ if ($bytes > 2147483647) { for ($i = 0; $i < $bytes; $i += 1073741824) { $n = ($bytes - $i) > 1073741824 ? 1073741824 : $bytes - $i; $buf .= Sodium::randombytes_buf((int) $n); } } else { $buf .= Sodium::randombytes_buf((int) $bytes); } if (is_string($buf)) { if (RandomCompat_strlen($buf) === $bytes) { return $buf; } } /** * If we reach here, PHP has failed us. */ throw new Exception( 'Could not gather sufficient random data' ); } } random_int.php 0000666 00000015075 15165103463 0007427 0 ustar 00 <?php if (!is_callable('random_int')) { /** * Random_* Compatibility Library * for using the new PHP 7 random_* API in PHP 5 projects * * The MIT License (MIT) * * Copyright (c) 2015 - 2018 Paragon Initiative Enterprises * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /** * Fetch a random integer between $min and $max inclusive * * @param int $min * @param int $max * * @throws Exception * * @return int */ function random_int($min, $max) { /** * Type and input logic checks * * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX) * (non-inclusive), it will sanely cast it to an int. If you it's equal to * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats * lose precision, so the <= and => operators might accidentally let a float * through. */ try { /** @var int $min */ $min = RandomCompat_intval($min); } catch (TypeError $ex) { throw new TypeError( 'random_int(): $min must be an integer' ); } try { /** @var int $max */ $max = RandomCompat_intval($max); } catch (TypeError $ex) { throw new TypeError( 'random_int(): $max must be an integer' ); } /** * Now that we've verified our weak typing system has given us an integer, * let's validate the logic then we can move forward with generating random * integers along a given range. */ if ($min > $max) { throw new Error( 'Minimum value must be less than or equal to the maximum value' ); } if ($max === $min) { return (int) $min; } /** * Initialize variables to 0 * * We want to store: * $bytes => the number of random bytes we need * $mask => an integer bitmask (for use with the &) operator * so we can minimize the number of discards */ $attempts = $bits = $bytes = $mask = $valueShift = 0; /** @var int $attempts */ /** @var int $bits */ /** @var int $bytes */ /** @var int $mask */ /** @var int $valueShift */ /** * At this point, $range is a positive number greater than 0. It might * overflow, however, if $max - $min > PHP_INT_MAX. PHP will cast it to * a float and we will lose some precision. * * @var int|float $range */ $range = $max - $min; /** * Test for integer overflow: */ if (!is_int($range)) { /** * Still safely calculate wider ranges. * Provided by @CodesInChaos, @oittaa * * @ref https://gist.github.com/CodesInChaos/03f9ea0b58e8b2b8d435 * * We use ~0 as a mask in this case because it generates all 1s * * @ref https://eval.in/400356 (32-bit) * @ref http://3v4l.org/XX9r5 (64-bit) */ $bytes = PHP_INT_SIZE; /** @var int $mask */ $mask = ~0; } else { /** * $bits is effectively ceil(log($range, 2)) without dealing with * type juggling */ while ($range > 0) { if ($bits % 8 === 0) { ++$bytes; } ++$bits; $range >>= 1; /** @var int $mask */ $mask = $mask << 1 | 1; } $valueShift = $min; } /** @var int $val */ $val = 0; /** * Now that we have our parameters set up, let's begin generating * random integers until one falls between $min and $max */ /** @psalm-suppress RedundantCondition */ do { /** * The rejection probability is at most 0.5, so this corresponds * to a failure probability of 2^-128 for a working RNG */ if ($attempts > 128) { throw new Exception( 'random_int: RNG is broken - too many rejections' ); } /** * Let's grab the necessary number of random bytes */ $randomByteString = random_bytes($bytes); /** * Let's turn $randomByteString into an integer * * This uses bitwise operators (<< and |) to build an integer * out of the values extracted from ord() * * Example: [9F] | [6D] | [32] | [0C] => * 159 + 27904 + 3276800 + 201326592 => * 204631455 */ $val &= 0; for ($i = 0; $i < $bytes; ++$i) { $val |= ord($randomByteString[$i]) << ($i * 8); } /** @var int $val */ /** * Apply mask */ $val &= $mask; $val += $valueShift; ++$attempts; /** * If $val overflows to a floating point number, * ... or is larger than $max, * ... or smaller than $min, * then try again. */ } while (!is_int($val) || $val > $max || $val < $min); return (int) $val; } }
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