ChecksumList.php in Automatic Updates 8

Namespace

Drupal\Signify

File

vendor/drupal/php-signify/src/ChecksumList.php

<?php

namespace Drupal\Signify;

class ChecksumList implements \Countable, \Iterator {

  // Allowed checksum algorithms and their base-16 (hex) lengths.
  protected $HASH_ALGO_BASE64_LENGTHS = array(
    'SHA256' => 64,
    'SHA512' => 128,
  );
  protected $checksums = array();
  protected $position = 0;
  public function __construct($checksum_list_raw, $list_is_trusted) {
    $lines = explode("\n", $checksum_list_raw);
    foreach ($lines as $line) {
      if (trim($line) == '') {
        continue;
      }
      if (substr($line, 0, 1) === '\\') {
        throw new VerifierException('Filenames with problematic characters are not yet supported.');
      }
      $algo = substr($line, 0, strpos($line, ' '));
      if (empty($this->HASH_ALGO_BASE64_LENGTHS[$algo])) {
        throw new VerifierException("Algorithm \"{$algo}\" is unsupported for checksum verification.");
      }
      $filename_start = strpos($line, '(') + 1;
      $bytes_after_filename = $this->HASH_ALGO_BASE64_LENGTHS[$algo] + 4;
      $filename = substr($line, $filename_start, -$bytes_after_filename);
      $this->checksums[] = new VerifierFileChecksum($filename, $algo, substr($line, -$this->HASH_ALGO_BASE64_LENGTHS[$algo]), $list_is_trusted);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function current() {
    return $this->checksums[$this->position];
  }

  /**
   * {@inheritdoc}
   */
  public function next() {
    $this->position += 1;
  }

  /**
   * {@inheritdoc}
   */
  public function key() {
    return $this->position;
  }

  /**
   * {@inheritdoc}
   */
  public function valid() {
    return isset($this->checksums[$this->position]);
  }

  /**
   * {@inheritdoc}
   */
  public function rewind() {
    $this->position = 0;
  }

  /**
   * {@inheritdoc}
   */
  public function count() {
    return count($this->checksums);
  }

}

Classes

Name	Description
ChecksumList