Na}{

File Content: `TreeHash.php`

<?php

namespace PleskLetsEncrypt\Aws\Glacier;

use PleskLetsEncrypt\Aws\HashInterface;
/**
 * Encapsulates the creation of a tree hash from streamed data
 */
class TreeHash implements HashInterface
{
    const MB = 1048576;
    const EMPTY_HASH = 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855';
    /** @var string Algorithm used for hashing. */
    private $algorithm;
    /** @var string Buffered data that has not yet been hashed. */
    private $buffer;
    /** @var array Binary checksums from which the tree hash is derived. */
    private $checksums = [];
    /** @var string Resulting hash in binary form. */
    private $hash;
    public function __construct($algorithm = 'sha256')
    {
        $this->algorithm = $algorithm;
        $this->reset();
    }
    /**
     * {@inheritdoc}
     * @throws \LogicException if the root tree hash is already calculated
     */
    public function update($data)
    {
        // Error if hash is already calculated.
        if ($this->hash) {
            throw new \LogicException('You may not add more data to a ' . 'complete tree hash.');
        }
        // Buffer incoming data.
        $this->buffer .= $data;
        // When there is more than a MB of data, create a checksum.
        while (\strlen($this->buffer) >= self::MB) {
            $data = \substr($this->buffer, 0, self::MB);
            $this->buffer = \substr($this->buffer, self::MB) ?: '';
            $this->checksums[] = \hash($this->algorithm, $data, \true);
        }
        return $this;
    }
    /**
     * Add a checksum to the tree hash directly
     *
     * @param string $checksum   The checksum to add
     * @param bool $inBinaryForm TRUE if checksum is in binary form
     *
     * @return self
     * @throws \LogicException if the root tree hash is already calculated
     */
    public function addChecksum($checksum, $inBinaryForm = \false)
    {
        // Error if hash is already calculated
        if ($this->hash) {
            throw new \LogicException('You may not add more checksums to a ' . 'complete tree hash.');
        }
        // Convert the checksum to binary form if necessary
        $this->checksums[] = $inBinaryForm ? $checksum : \hex2bin($checksum);
        return $this;
    }
    public function complete()
    {
        if (!$this->hash) {
            // Clear out the remaining buffer.
            if (\strlen($this->buffer) > 0) {
                $this->checksums[] = \hash($this->algorithm, $this->buffer, \true);
                $this->buffer = '';
            }
            // If no hashes, add the EMPTY_HASH.
            if (!$this->checksums) {
                $this->checksums[] = \hex2bin(self::EMPTY_HASH);
            }
            // Perform hashes up the tree to arrive at the root checksum.
            $hashes = $this->checksums;
            while (\count($hashes) > 1) {
                $sets = \array_chunk($hashes, 2);
                $hashes = array();
                foreach ($sets as $set) {
                    $hashes[] = \count($set) === 1 ? $set[0] : \hash($this->algorithm, $set[0] . $set[1], \true);
                }
            }
            $this->hash = $hashes[0];
        }
        return $this->hash;
    }
    public function reset()
    {
        $this->hash = null;
        $this->checksums = [];
        $this->buffer = '';
    }
}
Name	Size	Permission
Exception	---	0755
GlacierClient.php	11107 bytes	0644
MultipartUploader.php	9763 bytes	0644
TreeHash.php	3360 bytes	0644
File Content: TreeHash.php

File Content: `TreeHash.php`
