1 files changed, 158 insertions, 0 deletions
diff --git a/www/wiki/includes/auth/ConfirmLinkSecondaryAuthenticationProvider.php b/www/wiki/includes/auth/ConfirmLinkSecondaryAuthenticationProvider.php
new file mode 100644
index 00000000..7f121cde
--- /dev/null
+++ b/www/wiki/includes/auth/ConfirmLinkSecondaryAuthenticationProvider.php
@@ -0,0 +1,158 @@
+<?php
+
+namespace MediaWiki\Auth;
+
+use User;
+
+/**
+ * Links third-party authentication to the user's account
+ *
+ * If the user logged into linking provider accounts that aren't linked to a
+ * local user, this provider will prompt the user to link them after a
+ * successful login or account creation.
+ *
+ * To avoid confusing behavior, this provider should be later in the
+ * configuration list than any provider that can abort the authentication
+ * process, so that it is only invoked for successful authentication.
+ */
+class ConfirmLinkSecondaryAuthenticationProvider extends AbstractSecondaryAuthenticationProvider {
+
+	public function getAuthenticationRequests( $action, array $options ) {
+		return [];
+	}
+
+	public function beginSecondaryAuthentication( $user, array $reqs ) {
+		return $this->beginLinkAttempt( $user, 'AuthManager::authnState' );
+	}
+
+	public function continueSecondaryAuthentication( $user, array $reqs ) {
+		return $this->continueLinkAttempt( $user, 'AuthManager::authnState', $reqs );
+	}
+
+	public function beginSecondaryAccountCreation( $user, $creator, array $reqs ) {
+		return $this->beginLinkAttempt( $user, 'AuthManager::accountCreationState' );
+	}
+
+	public function continueSecondaryAccountCreation( $user, $creator, array $reqs ) {
+		return $this->continueLinkAttempt( $user, 'AuthManager::accountCreationState', $reqs );
+	}
+
+	/**
+	 * Begin the link attempt
+	 * @param User $user
+	 * @param string $key Session key to look in
+	 * @return AuthenticationResponse
+	 */
+	protected function beginLinkAttempt( $user, $key ) {
+		$session = $this->manager->getRequest()->getSession();
+		$state = $session->getSecret( $key );
+		if ( !is_array( $state ) ) {
+			return AuthenticationResponse::newAbstain();
+		}
+
+		$maybeLink = array_filter( $state['maybeLink'], function ( $req ) use ( $user ) {
+			if ( !$req->action ) {
+				$req->action = AuthManager::ACTION_CHANGE;
+			}
+			$req->username = $user->getName();
+			return $this->manager->allowsAuthenticationDataChange( $req )->isGood();
+		} );
+		if ( !$maybeLink ) {
+			return AuthenticationResponse::newAbstain();
+		}
+
+		$req = new ConfirmLinkAuthenticationRequest( $maybeLink );
+		return AuthenticationResponse::newUI(
+			[ $req ],
+			wfMessage( 'authprovider-confirmlink-message' ),
+			'warning'
+		);
+	}
+
+	/**
+	 * Continue the link attempt
+	 * @param User $user
+	 * @param string $key Session key to look in
+	 * @param AuthenticationRequest[] $reqs
+	 * @return AuthenticationResponse
+	 */
+	protected function continueLinkAttempt( $user, $key, array $reqs ) {
+		$req = ButtonAuthenticationRequest::getRequestByName( $reqs, 'linkOk' );
+		if ( $req ) {
+			return AuthenticationResponse::newPass();
+		}
+
+		$req = AuthenticationRequest::getRequestByClass( $reqs, ConfirmLinkAuthenticationRequest::class );
+		if ( !$req ) {
+			// WTF? Retry.
+			return $this->beginLinkAttempt( $user, $key );
+		}
+
+		$session = $this->manager->getRequest()->getSession();
+		$state = $session->getSecret( $key );
+		if ( !is_array( $state ) ) {
+			return AuthenticationResponse::newAbstain();
+		}
+
+		$maybeLink = [];
+		foreach ( $state['maybeLink'] as $linkReq ) {
+			$maybeLink[$linkReq->getUniqueId()] = $linkReq;
+		}
+		if ( !$maybeLink ) {
+			return AuthenticationResponse::newAbstain();
+		}
+
+		$state['maybeLink'] = [];
+		$session->setSecret( $key, $state );
+
+		$statuses = [];
+		$anyFailed = false;
+		foreach ( $req->confirmedLinkIDs as $id ) {
+			if ( isset( $maybeLink[$id] ) ) {
+				$req = $maybeLink[$id];
+				$req->username = $user->getName();
+				if ( !$req->action ) {
+					// Make sure the action is set, but don't override it if
+					// the provider filled it in.
+					$req->action = AuthManager::ACTION_CHANGE;
+				}
+				$status = $this->manager->allowsAuthenticationDataChange( $req );
+				$statuses[] = [ $req, $status ];
+				if ( $status->isGood() ) {
+					$this->manager->changeAuthenticationData( $req );
+				} else {
+					$anyFailed = true;
+				}
+			}
+		}
+		if ( !$anyFailed ) {
+			return AuthenticationResponse::newPass();
+		}
+
+		$combinedStatus = \Status::newGood();
+		foreach ( $statuses as $data ) {
+			list( $req, $status ) = $data;
+			$descriptionInfo = $req->describeCredentials();
+			$description = wfMessage(
+				'authprovider-confirmlink-option',
+				$descriptionInfo['provider']->text(), $descriptionInfo['account']->text()
+			)->text();
+			if ( $status->isGood() ) {
+				$combinedStatus->error( wfMessage( 'authprovider-confirmlink-success-line', $description ) );
+			} else {
+				$combinedStatus->error( wfMessage(
+					'authprovider-confirmlink-failed-line', $description, $status->getMessage()->text()
+				) );
+			}
+		}
+		return AuthenticationResponse::newUI(
+			[
+				new ButtonAuthenticationRequest(
+					'linkOk', wfMessage( 'ok' ), wfMessage( 'authprovider-confirmlink-ok-help' )
+				)
+			],
+			$combinedStatus->getMessage( 'authprovider-confirmlink-failed' ),
+			'error'
+		);
+	}
+}