FM / Polyfill

/home/techb158/immovalet.com/vendor/aws/aws-sdk-php/src/Crypto/Polyfill/

/home/techb158/immovalet.com/vendor/aws/aws-sdk-php/src/Crypto/Polyfill

Name	Size	Mode	Actions
AesGcm.php	6997	0644	edit dl rm
ByteArray.php	7005	0644	edit dl rm
Gmac.php	6333	0644	edit dl rm
Key.php	1765	0644	edit dl rm
NeedsTrait.php	1049	0644	edit dl rm

Edit: /home/techb158/immovalet.com/vendor/aws/aws-sdk-php/src/Crypto/Polyfill/ByteArray.php (7005B)

<?php
namespace Aws\Crypto\Polyfill;

/**
 * Class ByteArray
 * @package Aws\Crypto\Polyfill
 */
class ByteArray extends \SplFixedArray
{
    use NeedsTrait;

/**
     * ByteArray constructor.
     *
     * @param int|string|int[] $size
     *     If you pass in an integer, it creates a ByteArray of that size.
     *     If you pass in a string or array, it converts it to an array of
     *       integers between 0 and 255.
     * @throws \InvalidArgumentException
     */
    public function __construct($size = 0)
    {
        $arr = null;
        // Integer? This behaves just like SplFixedArray.
        if (\is_array($size)) {
            // Array? We need to pass the count to parent::__construct() then populate
            $arr = $size;
            $size = \count($arr);
        } elseif (\is_string($size)) {
            // We need to avoid mbstring.func_overload
            if (\is_callable('\\mb_str_split')) {
                $tmp = \mb_str_split($size, 1, '8bit');
            } else {
                $tmp = \str_split($size, 1);
            }
            // Let's convert each character to an 8-bit integer and store in $arr
            $arr = [];
            if (!empty($tmp)) {
                foreach ($tmp as $t) {
                    if (strlen($t) < 1) {
                        continue;
                    }
                    $arr []= \unpack('C', $t)[1] & 0xff;
                }
            }
            $size = \count($arr);
        } elseif ($size instanceof ByteArray) {
            $arr = $size->toArray();
            $size = $size->count();
        } elseif (!\is_int($size)) {
            throw new \InvalidArgumentException(
                'Argument must be an integer, string, or array of integers.'
            );
        }

parent::__construct($size);

if (!empty($arr)) {
            // Populate this object with values from constructor argument
            foreach ($arr as $i => $v) {
                $this->offsetSet($i, $v);
            }
        } else {
            // Initialize to zero.
            for ($i = 0; $i < $size; ++$i) {
                $this->offsetSet($i, 0);
            }
        }
    }

/**
     * Encode an integer into a byte array. 32-bit (unsigned), big endian byte order.
     *
     * @param int $num
     * @return self
     */
    public static function enc32be($num)
    {
        return new ByteArray(\pack('N', $num));
    }

/**
     * @param ByteArray $other
     * @return bool
     */
    public function equals(ByteArray $other)
    {
        if ($this->count() !== $other->count()) {
            return false;
        }
        $d = 0;
        for ($i = $this->count() - 1; $i >= 0; --$i) {
            $d |= $this[$i] ^ $other[$i];
        }
        return $d === 0;
    }

/**
     * @param ByteArray $array
     * @return ByteArray
     */
    public function exclusiveOr(ByteArray $array)
    {
        self::needs(
            $this->count() === $array->count(),
            'Both ByteArrays must be equal size for exclusiveOr()'
        );
        $out = clone $this;
        for ($i = 0; $i < $this->count(); ++$i) {
            $out[$i] = $array[$i] ^ $out[$i];
        }
        return $out;
    }

/**
     * Returns a new ByteArray incremented by 1 (big endian byte order).
     *
     * @param int $increase
     * @return self
     */
    public function getIncremented($increase = 1)
    {
        $clone = clone $this;
        $index = $clone->count();
        while ($index > 0) {
            --$index;
            $tmp = ($clone[$index] + $increase) & PHP_INT_MAX;
            $clone[$index] = $tmp & 0xff;
            $increase = $tmp >> 8;
        }
        return $clone;
    }

/**
     * Sets a value. See SplFixedArray for more.
     *
     * @param int $index
     * @param int $newval
     * @return void
     */
    public function offsetSet($index, $newval)
    {
        parent::offsetSet($index, $newval & 0xff);
    }

/**
     * Return a copy of this ByteArray, bitshifted to the right by 1.
     * Used in Gmac.
     *
     * @return self
     */
    public function rshift()
    {
        $out = clone $this;
        for ($j = $this->count() - 1; $j > 0; --$j) {
            $out[$j] = (($out[$j - 1] & 1) << 7) | ($out[$j] >> 1);
        }
        $out[0] >>= 1;
        return $out;
    }

/**
     * Constant-time conditional select. This is meant to read like a ternary operator.
     *
     * $z = ByteArray::select(1, $x, $y); // $z is equal to $x
     * $z = ByteArray::select(0, $x, $y); // $z is equal to $y
     *
     * @param int $select
     * @param ByteArray $left
     * @param ByteArray $right
     * @return ByteArray
     */
    public static function select($select, ByteArray $left, ByteArray $right)
    {
        self::needs(
            $left->count() === $right->count(),
            'Both ByteArrays must be equal size for select()'
        );
        $rightLength = $right->count();
        $out = clone $right;
        $mask = (-($select & 1)) & 0xff;
        for ($i = 0; $i < $rightLength;  $i++) {
            $out[$i] = $out[$i] ^ (($left[$i] ^ $right[$i]) & $mask);
        }
        return $out;
    }

/**
     * Overwrite values of this ByteArray based on a separate ByteArray, with
     * a given starting offset and length.
     *
     * See JavaScript's Uint8Array.set() for more information.
     *
     * @param ByteArray $input
     * @param int $offset
     * @param int|null $length
     * @return self
     */
    public function set(ByteArray $input, $offset = 0, $length = null)
    {
        self::needs(
            is_int($offset) && $offset >= 0,
            'Offset must be a positive integer or zero'
        );
        if (is_null($length)) {
            $length = $input->count();
        }

$i = 0; $j = $offset;
        while ($i < $length && $j < $this->count()) {
            $this[$j] = $input[$i];
            ++$i;
            ++$j;
        }
        return $this;
    }

/**
     * Returns a slice of this ByteArray.
     *
     * @param int $start
     * @param null $length
     * @return self
     */
    public function slice($start = 0, $length = null)
    {
        return new ByteArray(\array_slice($this->toArray(), $start, $length));
    }

/**
     * Mutates the current state and sets all values to zero.
     *
     * @return void
     */
    public function zeroize()
    {
        for ($i = $this->count() - 1; $i >= 0; --$i) {
            $this->offsetSet($i, 0);
        }
    }

/**
     * Converts the ByteArray to a raw binary string.
     *
     * @return string
     */
    public function toString()
    {
        $count = $this->count();
        if ($count === 0) {
            return '';
        }
        $args = $this->toArray();
        \array_unshift($args, \str_repeat('C', $count));
        // constant-time, PHP <5.6 equivalent to pack('C*', ...$args);
        return \call_user_func_array('\\pack', $args);
    }
}

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