Initial commit.

webform_encrypt.info

+name = Webform Encrypt
+description = Provides encryption for webform components
+core = 7.x
+package = Webform
+
+files[] = webform_encrypt.module
+files[] = webform_encrypt.install
+
+dependencies[] = aes
+dependencies[] = webform
+

webform_encrypt.install

+<?php
+
+/**
+ * Implementation of hook_schema()
+ */
+function webform_encrypt_schema() {
+  $schema['webform_encrypt'] = array(
+    'description' => 'Form metadata',
+    'fields' => array(
+      'cid' => array(
+        'description' => 'The component ID from webform',
+        'type' => 'int',
+        'unsigned' => TRUE,
+        'not null' => TRUE,
+      ),
+      'encrypt' => array(
+        'description' => 'Whether to encrypt the value',
+        'type' => 'int',
+        'size' => 'tiny',
+        'unsigned' => TRUE,
+        'not null' => TRUE,
+      ),
+    ),
+    'unique keys' => array(
+      'cid' => array('cid'),
+    ),
+  );
+  return $schema;
+}
+
+/**
+ * Implementation of hook_uninstall().
+ */
+function webform_encrypt_uninstall() {
+  drupal_uninstall_schema('webform_encrypt');
+}

webform_encrypt.module

+<?php
+
+/**
+ * Implementation of hook_permission().
+ */
+function webform_encrypt_permission() {
+  return array(
+    'view encrypted values' => array(
+      'title' => t('View Encrypted Values in Webform Results'),
+      'description' => t('Users that do not have this permission will see placeholder text.'),
+    ),
+  );
+}
+
+/**
+ * Implementation of hook_form_alter()
+ */
+function webform_encrypt_form_alter(&$form, $form_state, $form_id) {
+
+  // Add our fields to the component add/edit form.
+  if ($form_id == 'webform_component_edit_form') {
+
+    $profile = db_query('SELECT * FROM {webform_encrypt} WHERE cid = ?', array($form['cid']['#value']))->fetchAssoc();
+
+    // Add settings for security.
+    $form['encryption'] = array(
+      '#type' => 'fieldset',
+      '#title' => t('Encryption'),
+      '#tree' => TRUE,
+    );
+    $form['encryption']['encrypt'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Encrypt this field\'s value'),
+      '#description' => t('!link to edit encryption settings.', array('!link' => l('Click here', 'admin/settings/aes'))),
+      '#default_value' => isset($profile['encrypt']) ? $profile['encrypt'] : 0,
+    );
+
+    // Add new submit handler to save our config data.
+    array_unshift($form['#submit'], '_webform_encrypt_component_save');
+  }
+
+}
+
+/**
+ * Submit callback to save form component settings.
+ */
+function _webform_encrypt_component_save($form, $form_state) {
+  $record = new StdClass();
+  $record->cid = $form_state['values']['cid'];
+  foreach ($form_state['values']['encryption'] as $key => $value) {
+    $record->$key = $value;
+  }
+  drupal_write_record('webform_encrypt', $record, 'cid');
+}
+
+/**
+ * Implementation of hook_node_load().
+ * Adding our extra data in to the webform component.
+ */
+function webform_encrypt_node_load($nodes, $types) {
+  // Abort if none of the nodes are webforms.
+  if (!in_array('webform', $types)) {
+    return;
+  }
+
+  // Otherwise, let's loop through the nodes.
+  foreach ($nodes as $nid => $node) {
+    $component_ids = array_keys($node->webform['components']);
+    $encrypt =  db_select('webform_encrypt', 'we')
+                  ->fields('we', array('cid', 'encrypt'))
+                  ->condition('cid', $component_ids, 'IN')
+                  ->execute()
+                  ->fetchAllKeyed();
+    foreach ($node->webform['components'] as $cid => $component) {
+      $node->webform['components'][$cid]['encrypt'] = $encrypt[$cid];
+    }
+  }
+}
+
+/**
+ * Implementation of hook_webform_submission_presave().
+ * Encrypt the value if the component has been marked as such.
+ */
+function webform_encrypt_webform_submission_presave($node, &$submission) {
+  foreach ($submission->data as $cid => $entry) {
+    if ($node->webform['components'][$cid]['encrypt']) {
+      $submission->data[$cid]['value'][0] = aes_encrypt($entry['value'][0]);
+    }
+  }
+}
+
+/**
+ * Implementation of hook_webform_submission_render_alter().
+ * Decrypt values when displaying webform submissions.
+ */
+function webform_encrypt_webform_submission_render_alter(&$renderable) {
+  foreach ($renderable['#submission']->data as $cid => $entry) {
+    if ($renderable['#node']->webform['components'][$cid]['encrypt']) {
+      $form_key = $renderable['#node']->webform['components'][$cid]['form_key'];
+      if (user_access('view encrypted values')) {
+        $renderable[$form_key]['#value'] = aes_decrypt($entry['value'][0]);
+      } else {
+        $renderable[$form_key]['#value'] = t('<Value Encrypted>');
+      }
+    }
+  }
+}