KeyClient.php in Lockr 7

Namespace

Lockr

File

src/Lockr/KeyClient.php

<?php

// ex: ts=4 sts=4 sw=4 et:
namespace Lockr;

use Lockr\Exception\ClientException;
use Lockr\Exception\ServerException;
class KeyClient {

  /**
   * @var Lockr The external interface.
   */
  protected $client;

  /**
   * @var string|bool Data to decrypt keys.
   */
  protected $encoded = null;

  /**
   * Constructs a SiteClient.
   *
   * @param Lockr $client The external interface.
   */
  public function __construct(Lockr $client) {
    $this->client = $client;
  }

  /**
   * Gets and sets encrypted keys.
   *
   * @param string $encoded (optional) Data to decrypt keys.
   *
   * @return self The client for method chaining.
   */
  public function encrypted($encoded = true) {
    $this->encoded = $encoded;
    return $this;
  }

  /**
   * Gets a key from Lockr.
   *
   * @param string $name The key name.
   *
   * @return string The key.
   */
  public function get($name) {
    list($status, $body) = $this->client
      ->get($this
      ->uri($name));
    $body = json_decode($body, true);
    if (json_last_error() !== JSON_ERROR_NONE || $status >= 500) {
      throw new ServerException();
    }
    if ($status >= 400) {
      throw new ClientException();
    }
    if (null !== $this->encoded) {
      return $this
        ->decrypt($body['key_value'], $this->encoded);
    }
    return $body['key_value'];
  }

  /**
   * Sets a key in Lockr.
   *
   * @param string $name The key name.
   * @param string $value The key value.
   * @param string $label The key label.
   *
   * @return string Returns the decrypt data or true.
   */
  public function set($name, $value, $label, $encoded = null) {
    if ($this->encoded) {
      if ($encoded === NULL) {
        list($value, $encoded) = $this
          ->encrypt($value);
      }
      else {
        list($value, $encoded) = $this
          ->reencrypt($value, $encoded);
      }
    }
    $data = array(
      'key_value' => $value,
      'key_label' => $label,
    );
    list($status, $body) = $this->client
      ->patch($this
      ->uri($name), $data);
    if ($status >= 500) {
      throw new ServerException($body);
    }
    if ($status >= 400) {
      throw new ClientException($body);
    }
    if ($this->encoded) {
      return $encoded;
    }
    return true;
  }

  /**
   * Deletes a key from Lockr.
   *
   * @param string $name The key name.
   */
  public function delete($name) {
    $this->client
      ->delete($this
      ->uri($name));
  }
  protected function uri($name) {
    return '/v1/key/' . urlencode($name);
  }
  protected function reencrypt($plaintext, $encoded) {
    list($cipher, $mode, $iv, $key) = $this
      ->decode($encoded);
    $ciphertext = mcrypt_encrypt($cipher, $key, $plaintext, $mode, $iv);
    $ciphertext = base64_encode($ciphertext);
    $encoded = $this
      ->encode($cipher, $mode, $iv, $key);
    return array(
      $ciphertext,
      $encoded,
    );
  }
  protected function encrypt($plaintext) {
    $cipher = MCRYPT_RIJNDAEL_256;
    $mode = MCRYPT_MODE_CBC;
    $key = openssl_random_pseudo_bytes(32);
    $iv_len = mcrypt_get_iv_size($cipher, $mode);
    $iv = mcrypt_create_iv($iv_len);
    $ciphertext = mcrypt_encrypt($cipher, $key, $plaintext, $mode, $iv);
    $ciphertext = base64_encode($ciphertext);
    $encoded = $this
      ->encode($cipher, $mode, $iv, $key);
    return array(
      $ciphertext,
      $encoded,
    );
  }
  protected function decrypt($ciphertext, $encoded) {
    list($cipher, $mode, $iv, $key) = $this
      ->decode($encoded);
    $ciphertext = base64_decode($ciphertext);
    $key = mcrypt_decrypt($cipher, $key, $ciphertext, $mode, $iv);
    return trim($key);
  }
  protected function encode($cipher, $mode, $iv, $key) {
    $parts = array(
      $cipher,
      $mode,
      base64_encode($iv),
      base64_encode($key),
    );
    return implode('$', $parts);
  }
  protected function decode($encoded) {
    list($cipher, $mode, $iv, $key) = explode('$', $encoded, 4);
    $iv = base64_decode($iv);
    $key = base64_decode($key);
    return array(
      $cipher,
      $mode,
      $iv,
      $key,
    );
  }

}

Classes

Name	Description
KeyClient