diff --git a/core/lib/Drupal/Core/Config/Entity/Condition.php b/core/lib/Drupal/Core/Config/Entity/Condition.php
new file mode 100644
index 0000000..f23177c
--- /dev/null
+++ b/core/lib/Drupal/Core/Config/Entity/Condition.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\Core\Config\Query\ConditionSql.
+ */
+
+namespace Drupal\Core\Config\Entity;
+
+use Drupal\Core\Entity\Query\ConditionBase;
+use Drupal\Core\Entity\Query\ConditionInterface;
+use Drupal\Core\Database\Query\SelectInterface;
+use Drupal\Core\Database\Query\Condition as SqlCondition;
+
+class Condition extends ConditionBase {
+
+  /**
+   * Implements Drupal\Core\Entity\Query\ConditionInterface::compile().
+   */
+  public function compile($query) {
+    $commands = array();
+    $info = entity_get_info($query->entityType);
+    $config_prefix = $info['config_prefix'];
+    $options = '-H ';
+    $postfix = " $query->directory/$config_prefix.*.yml";
+    foreach ($this->conditions as $condition) {
+      switch ($condition['op']) {
+        case '=':
+        case NULL:
+          $commands[] = "grep $options\"^ *" . $condition['field'] . ': \'\?' . $condition['value'] . '\'\?$"' . $postfix;
+          break;
+      }
+      $options = '';
+    }
+    exec(implode('|', $commands), $output);
+    $cut_length = strlen($query->directory) + strlen($config_prefix) + 2;
+    $ids = array();
+    foreach ($output as $line) {
+      preg_match('/^([^.]+)\./', substr($line, $cut_length), $matches);
+      $ids[] = $matches[1];
+    }
+    return $ids;
+  }
+
+  /**
+   * Implements Drupal\Core\Entity\Query\ConditionInterface::exists().
+   */
+  public function exists($field, $langcode = NULL) {
+  }
+
+  /**
+   * Implements Drupal\Core\Entity\Query\ConditionInterface::notExists().
+   */
+  public function notExists($field, $langcode = NULL) {
+  }
+
+  protected function translateCondition(&$condition) {
+    switch ($condition['operator']) {
+      case 'STARTS_WITH':
+        break;
+
+      case 'CONTAINS':
+        break;
+
+      case 'ENDS_WITH':
+        break;
+
+    }
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
index 6d0a3f4..8187dfc 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
@@ -428,6 +428,6 @@ protected function invokeHook($hook, EntityInterface $entity) {
    * Implements Drupal\Core\Entity\EntityStorageControllerInterface::getQueryServicename().
    */
   public function getQueryServicename() {
-    throw new \LogicException('Querying configuration entities is not supported.');
+    return 'entity.query.config';
   }
 }
diff --git a/core/lib/Drupal/Core/Config/Entity/Query.php b/core/lib/Drupal/Core/Config/Entity/Query.php
new file mode 100644
index 0000000..d73cd3d
--- /dev/null
+++ b/core/lib/Drupal/Core/Config/Entity/Query.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Drupal\Core\Config\Entity;
+
+use Drupal\Core\Entity\Query\QueryBase;
+
+class Query extends QueryBase {
+
+  /**
+   * @param string $entity_type
+   *   The entity type.
+   * @param string $conjunction
+   *   - AND: all of the conditions on the query need to match.
+   *   - OR: at least one of the conditions on the query need to match.
+   * @param string $directory
+   */
+  public function __construct($entity_type, $conjunction, $directory) {
+    parent::__construct($entity_type, $conjunction);
+    $this->directory = $directory;
+  }
+
+  /**
+   * Implements Drupal\Core\Entity\Query\QueryInterface::conditionGroupFactory().
+   */
+  public function conditionGroupFactory($conjunction = 'AND') {
+    return new Condition($conjunction);
+  }
+
+  /**
+   * Implements Drupal\Core\Entity\Query\QueryInterface::execute().
+   */
+  public function execute() {
+    $query = new \stdClass;
+    $query->directory = $this->directory;
+    $query->entityType = $this->entityType;
+    return $this->condition->compile($query);
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Config/Entity/QueryFactory.php b/core/lib/Drupal/Core/Config/Entity/QueryFactory.php
new file mode 100644
index 0000000..a944f03
--- /dev/null
+++ b/core/lib/Drupal/Core/Config/Entity/QueryFactory.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\Core\Config\Entity\QueryFactory.
+ */
+
+namespace Drupal\Core\Config\Entity;
+
+/**
+ * Factory class creating entity query objects for the SQL backend.
+ */
+class QueryFactory {
+
+  function __construct($directory) {
+    $this->directory = $directory;
+  }
+
+  function get($entity_type, $conjunction) {
+    return new Query($entity_type, $conjunction, $this->directory);
+  }
+}
diff --git a/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
index 48684e5..8d25f11 100644
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -67,6 +67,9 @@ public function build(ContainerBuilder $container) {
     // Add the entity query factory.
     $container->register('entity.query', 'Drupal\Core\Entity\Query\QueryFactory')
       ->addArgument(new Reference('service_container'));
+    // @todo: replace with active config storage refernece once it is in CoreBundle.
+    $container->register('entity.query.config', 'Drupal\Core\Config\Entity\QueryFactory')
+      ->addArgument(config_get_config_directory(CONFIG_ACTIVE_DIRECTORY));
 
     $container->register('router.dumper', 'Drupal\Core\Routing\MatcherDumper')
       ->addArgument(new Reference('database'));