Make external link/refresh use provider IDs, switch external account MFA to one-shot

Summary:
Depends on D20113. Ref T6703. Continue moving toward a future where multiple copies of a given type of provider may exist.

Switch MFA from session-MFA at the start to one-shot MFA at the actual link action.

Add one-shot MFA to the unlink action. This theoretically prevents an attacker from unlinking an account while you're getting coffee, registering `alIce` which they control, adding a copy of your profile picture, and then trying to trick you into writing a private note with your personal secrets or something.

Test Plan: Linked and unlinked accounts. Refreshed account. Unlinked, then registered a new account. Unlinked, then relinked to my old account.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T6703

Differential Revision: https://secure.phabricator.com/D20117

src/applications/auth/application/PhabricatorAuthApplication.php

@@ -62,7 +62,7 @@ final class PhabricatorAuthApplication extends PhabricatorApplication {
         'validate/' => 'PhabricatorAuthValidateController',
         'finish/' => 'PhabricatorAuthFinishController',
         'unlink/(?P<id>\d+)/' => 'PhabricatorAuthUnlinkController',
-        '(?P<action>link|refresh)/(?P<pkey>[^/]+)/'
+        '(?P<action>link|refresh)/(?P<id>\d+)/'
           => 'PhabricatorAuthLinkController',
         'confirmlink/(?P<akey>[^/]+)/'
           => 'PhabricatorAuthConfirmLinkController',

src/applications/auth/controller/PhabricatorAuthConfirmLinkController.php

@@ -20,7 +20,15 @@ final class PhabricatorAuthConfirmLinkController
 
     $panel_uri = '/settings/panel/external/';
 
-    if ($request->isFormPost()) {
+    if ($request->isFormOrHisecPost()) {
+      $workflow_key = sprintf(
+        'account.link(%s)',
+        $account->getPHID());
+
+      $hisec_token = id(new PhabricatorAuthSessionEngine())
+        ->setWorkflowKey($workflow_key)
+        ->requireHighSecurityToken($viewer, $request, $panel_uri);
+
       $account->setUserPHID($viewer->getPHID());
       $account->save();
 
@@ -31,14 +39,7 @@ final class PhabricatorAuthConfirmLinkController
       return id(new AphrontRedirectResponse())->setURI($panel_uri);
     }
 
-    // TODO: Provide more information about the external account. Clicking
+    $dialog = $this->newDialog()
-    // through this form blindly is dangerous.
-
-    // TODO: If the user has password authentication, require them to retype
-    // their password here.
-
-    $dialog = id(new AphrontDialogView())
-      ->setUser($viewer)
       ->setTitle(pht('Confirm %s Account Link', $provider->getProviderName()))
       ->addCancelButton($panel_uri)
       ->addSubmitButton(pht('Confirm Account Link'));

src/applications/auth/controller/PhabricatorAuthController.php

@@ -213,19 +213,19 @@ abstract class PhabricatorAuthController extends PhabricatorController {
       return array($account, $provider, $response);
     }
 
-    $provider = PhabricatorAuthProvider::getEnabledProviderByKey(
+    $config = $account->getProviderConfig();
-      $account->getProviderKey());
+    if (!$config->getIsEnabled()) {
-
-    if (!$provider) {
       $response = $this->renderError(
         pht(
-          'The account you are attempting to register with uses a nonexistent '.
+          'The account you are attempting to register with uses a disabled '.
-          'or disabled authentication provider (with key "%s"). An '.
+          'authentication provider ("%s"). An administrator may have '.
-          'administrator may have recently disabled this provider.',
+          'recently disabled this provider.',
-          $account->getProviderKey()));
+          $config->getDisplayName()));
       return array($account, $provider, $response);
     }
 
+    $provider = $config->getProvider();
+
     return array($account, $provider, null);
   }
 

src/applications/auth/controller/PhabricatorAuthLinkController.php

@@ -6,14 +6,20 @@ final class PhabricatorAuthLinkController
   public function handleRequest(AphrontRequest $request) {
     $viewer = $this->getViewer();
     $action = $request->getURIData('action');
-    $provider_key = $request->getURIData('pkey');
 
-    $provider = PhabricatorAuthProvider::getEnabledProviderByKey(
+    $id = $request->getURIData('id');
-      $provider_key);
+
-    if (!$provider) {
+    $config = id(new PhabricatorAuthProviderConfigQuery())
+      ->setViewer($viewer)
+      ->withIDs(array($id))
+      ->withIsEnabled(true)
+      ->executeOne();
+    if (!$config) {
       return new Aphront404Response();
     }
 
+    $provider = $config->getProvider();
+
     switch ($action) {
       case 'link':
         if (!$provider->shouldAllowAccountLink()) {
@@ -37,15 +43,15 @@ final class PhabricatorAuthLinkController
         return new Aphront400Response();
     }
 
-    $account = id(new PhabricatorExternalAccount())->loadOneWhere(
+    $accounts = id(new PhabricatorExternalAccountQuery())
-      'accountType = %s AND accountDomain = %s AND userPHID = %s',
+      ->setViewer($viewer)
-      $provider->getProviderType(),
+      ->withUserPHIDs(array($viewer->getPHID()))
-      $provider->getProviderDomain(),
+      ->withProviderConfigPHIDs(array($config->getPHID()))
-      $viewer->getPHID());
+      ->execute();
 
     switch ($action) {
       case 'link':
-        if ($account) {
+        if ($accounts) {
           return $this->renderErrorPage(
             pht('Account Already Linked'),
             array(
@@ -56,7 +62,7 @@ final class PhabricatorAuthLinkController
         }
         break;
       case 'refresh':
-        if (!$account) {
+        if (!$accounts) {
           return $this->renderErrorPage(
             pht('No Account Linked'),
             array(
@@ -76,11 +82,6 @@ final class PhabricatorAuthLinkController
 
     switch ($action) {
       case 'link':
-        id(new PhabricatorAuthSessionEngine())->requireHighSecuritySession(
-          $viewer,
-          $request,
-          $panel_uri);
-
         $form = $provider->buildLinkForm($this);
         break;
       case 'refresh':

src/applications/auth/controller/PhabricatorAuthUnlinkController.php

@@ -31,7 +31,7 @@ final class PhabricatorAuthUnlinkController
     $confirmations = $request->getStrList('confirmations');
     $confirmations = array_fuse($confirmations);
 
-    if (!$request->isFormPost() || !isset($confirmations['unlink'])) {
+    if (!$request->isFormOrHisecPost() || !isset($confirmations['unlink'])) {
       return $this->renderConfirmDialog($confirmations, $config, $done_uri);
     }
 
@@ -59,6 +59,14 @@ final class PhabricatorAuthUnlinkController
       }
     }
 
+    $workflow_key = sprintf(
+      'account.unlink(%s)',
+      $account->getPHID());
+
+    $hisec_token = id(new PhabricatorAuthSessionEngine())
+      ->setWorkflowKey($workflow_key)
+      ->requireHighSecurityToken($viewer, $request, $done_uri);
+
     $account->delete();
 
     id(new PhabricatorAuthSessionEngine())->terminateLoginSessions(

src/applications/auth/query/PhabricatorExternalAccountQuery.php

@@ -21,6 +21,7 @@ final class PhabricatorExternalAccountQuery
   private $userPHIDs;
   private $needImages;
   private $accountSecrets;
+  private $providerConfigPHIDs;
 
   public function withUserPHIDs(array $user_phids) {
     $this->userPHIDs = $user_phids;
@@ -62,6 +63,11 @@ final class PhabricatorExternalAccountQuery
     return $this;
   }
 
+  public function withProviderConfigPHIDs(array $phids) {
+    $this->providerConfigPHIDs = $phids;
+    return $this;
+  }
+
   public function newResultObject() {
     return new PhabricatorExternalAccount();
   }
@@ -181,6 +187,13 @@ final class PhabricatorExternalAccountQuery
         $this->accountSecrets);
     }
 
+    if ($this->providerConfigPHIDs !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'providerConfigPHID IN (%Ls)',
+        $this->providerConfigPHIDs);
+    }
+
     return $where;
   }
 

src/applications/people/controller/PhabricatorPeopleProfilePictureController.php

@@ -157,13 +157,10 @@ final class PhabricatorPeopleProfilePictureController
         continue;
       }
 
-      $provider = PhabricatorAuthProvider::getEnabledProviderByKey(
+      $config = $account->getProviderConfig();
-        $account->getProviderKey());
+      $provider = $config->getProvider();
-      if ($provider) {
+
       $tip = pht('Picture From %s', $provider->getProviderName());
-      } else {
-        $tip = pht('Picture From External Account');
-      }
 
       if ($file->isTransformableImage()) {
         $images[$file->getPHID()] = array(

src/applications/settings/panel/PhabricatorExternalAccountsSettingsPanel.php

@@ -44,18 +44,14 @@ final class PhabricatorExternalAccountsSettingsPanel
     foreach ($accounts as $account) {
       $item = new PHUIObjectItemView();
 
-      $provider = idx($providers, $account->getProviderKey());
+      $config = $account->getProviderConfig();
-      if ($provider) {
+      $provider = $config->getProvider();
+
       $item->setHeader($provider->getProviderName());
       $can_unlink = $provider->shouldAllowAccountUnlink();
       if (!$can_unlink) {
         $item->addAttribute(pht('Permanently Linked'));
       }
-      } else {
-        $item->setHeader(
-          pht('Unknown Account ("%s")', $account->getProviderKey()));
-        $can_unlink = true;
-      }
 
       $can_login = $account->isUsableForLogin();
       if (!$can_login) {
@@ -65,12 +61,12 @@ final class PhabricatorExternalAccountsSettingsPanel
             'account provider).'));
       }
 
-      $can_refresh = $provider && $provider->shouldAllowAccountRefresh();
+      $can_refresh = $provider->shouldAllowAccountRefresh();
       if ($can_refresh) {
         $item->addAction(
           id(new PHUIListItemView())
             ->setIcon('fa-refresh')
-            ->setHref('/auth/refresh/'.$account->getProviderKey().'/'));
+            ->setHref('/auth/refresh/'.$config->getID().'/'));
       }
 
       $item->addAction(
@@ -94,14 +90,15 @@ final class PhabricatorExternalAccountsSettingsPanel
       ->setNoDataString(
         pht('Your account is linked with all available providers.'));
 
-    $accounts = mpull($accounts, null, 'getProviderKey');
-
     $configs = id(new PhabricatorAuthProviderConfigQuery())
       ->setViewer($viewer)
       ->withIsEnabled(true)
       ->execute();
     $configs = msort($configs, 'getSortVector');
 
+    $account_map = mgroup($accounts, 'getProviderConfigPHID');
+
+
     foreach ($configs as $config) {
       $provider = $config->getProvider();
 
@@ -110,12 +107,11 @@ final class PhabricatorExternalAccountsSettingsPanel
       }
 
       // Don't show the user providers they already have linked.
-      $provider_key = $config->getProvider()->getProviderKey();
+      if (isset($account_map[$config->getPHID()])) {
-      if (isset($accounts[$provider_key])) {
         continue;
       }
 
-      $link_uri = '/auth/link/'.$provider->getProviderKey().'/';
+      $link_uri = '/auth/link/'.$config->getID().'/';
 
       $link_button = id(new PHUIButtonView())
         ->setTag('a')