[stable31] fix: revive always storing lowercased email addresses

build/integration/features/provisioning-v1.feature

@@ -187,6 +187,18 @@ Feature: provisioning
       | timezoneOffset | 0 |
       | pronouns | NULL |
 
+  Scenario: Edit a user with mixed case emails
+    Given As an "admin"
+    And user "brand-new-user" exists
+    And sending "PUT" to "/cloud/users/brand-new-user" with
+      | key | email |
+      | value | [email protected] |
+    And the OCS status code should be "100"
+    And the HTTP status code should be "200"
+    Then user "brand-new-user" has
+      | id | brand-new-user |
+      | email | [email protected] |
+
   Scenario: Edit a user account properties scopes
     Given user "brand-new-user" exists
     And As an "brand-new-user"

core/Migrations/Version32000Date20250620081925.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OC\Core\Migrations;
+
+/**
+ * Run the old migration Version24000Date20211210141942 again.
+ */
+class Version32000Date20250620081925 extends Version24000Date20211210141942 {
+}

lib/composer/composer/autoload_classmap.php

@@ -1459,6 +1459,7 @@
     'OC\\Core\\Migrations\\Version31000Date20240101084401' => $baseDir . '/core/Migrations/Version31000Date20240101084401.php',
     'OC\\Core\\Migrations\\Version31000Date20240814184402' => $baseDir . '/core/Migrations/Version31000Date20240814184402.php',
     'OC\\Core\\Migrations\\Version31000Date20250213102442' => $baseDir . '/core/Migrations/Version31000Date20250213102442.php',
+    'OC\\Core\\Migrations\\Version32000Date20250620081925' => $baseDir . '/core/Migrations/Version32000Date20250620081925.php',
     'OC\\Core\\Notification\\CoreNotifier' => $baseDir . '/core/Notification/CoreNotifier.php',
     'OC\\Core\\ResponseDefinitions' => $baseDir . '/core/ResponseDefinitions.php',
     'OC\\Core\\Service\\LoginFlowV2Service' => $baseDir . '/core/Service/LoginFlowV2Service.php',

lib/composer/composer/autoload_static.php

@@ -1508,6 +1508,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Core\\Migrations\\Version31000Date20240101084401' => __DIR__ . '/../../..' . '/core/Migrations/Version31000Date20240101084401.php',
         'OC\\Core\\Migrations\\Version31000Date20240814184402' => __DIR__ . '/../../..' . '/core/Migrations/Version31000Date20240814184402.php',
         'OC\\Core\\Migrations\\Version31000Date20250213102442' => __DIR__ . '/../../..' . '/core/Migrations/Version31000Date20250213102442.php',
+        'OC\\Core\\Migrations\\Version32000Date20250620081925' => __DIR__ . '/../../..' . '/core/Migrations/Version32000Date20250620081925.php',
         'OC\\Core\\Notification\\CoreNotifier' => __DIR__ . '/../../..' . '/core/Notification/CoreNotifier.php',
         'OC\\Core\\ResponseDefinitions' => __DIR__ . '/../../..' . '/core/ResponseDefinitions.php',
         'OC\\Core\\Service\\LoginFlowV2Service' => __DIR__ . '/../../..' . '/core/Service/LoginFlowV2Service.php',

lib/private/Config/UserConfig.php

@@ -1058,6 +1058,11 @@ private function setTypedValue(
 		int $flags,
 		ValueType $type,
 	): bool {
+		// Primary email addresses are always(!) expected to be lowercase
+		if ($app === 'settings' && $key === 'email') {
+			$value = strtolower($value);
+		}
+
 		$this->assertParams($userId, $app, $key);
 		if (!$this->matchAndApplyLexiconDefinition($userId, $app, $key, $lazy, $type, $flags)) {
 			// returns false as database is not updated

tests/lib/AllConfigTest.php

@@ -91,6 +91,27 @@ public function testSetUserValue(): void {
 		$config->deleteUserValue('userSet', 'appSet', 'keySet');
 	}
 
+	/**
+	 * This test needs to stay! Emails are expected to be lowercase due to performance reasons.
+	 * This way we can skip the expensive casing change on the database.
+	 */
+	public function testSetUserValueSettingsEmail(): void {
+		$selectAllSQL = 'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?';
+		$config = $this->getConfig();
+
+		$config->setUserValue('userSet', 'settings', 'email', '[email protected]');
+
+		$result = $this->connection->executeQuery($selectAllSQL, ['userSet'])->fetchAll();
+
+		$this->assertEquals(1, count($result));
+		$this->assertEquals([
+			'userid' => 'userSet',
+			'appid' => 'settings',
+			'configkey' => 'email',
+			'configvalue' => '[email protected]'
+		], $result[0]);
+	}
+
 	public function testSetUserValueWithPreCondition(): void {
 		$config = $this->getConfig();
 

tests/lib/Config/UserConfigTest.php

@@ -1249,6 +1249,19 @@ public function testSetValueMixed(
 		}
 	}
 
+	/**
+	 * This test needs to stay! Emails are expected to be lowercase due to performance reasons.
+	 * This way we can skip the expensive casing change on the database.
+	 */
+	public function testSetValueMixedWithSettingsEmail(): void {
+		$userConfig = $this->generateUserConfig();
+
+		$edited = $userConfig->setValueMixed('user1', 'settings', 'email', '[email protected]');
+		$this->assertTrue($edited);
+
+		$actual = $userConfig->getValueMixed('user1', 'settings', 'email');
+		$this->assertEquals('[email protected]', $actual);
+	}
 
 	public function providerSetValueString(): array {
 		return [

version.php

@@ -9,7 +9,7 @@
 // between betas, final and RCs. This is _not_ the public version number. Reset minor/patch level
 // when updating major/minor version number.
 
-$OC_Version = [31, 0, 6, 2];
+$OC_Version = [31, 0, 6, 3];
 
 // The human-readable string
 $OC_VersionString = '31.0.6';