feat: Add option to update the public key of a user

Signed-off-by: Marcel Müller <marcel-mueller@gmx.de>

core/Command/User/Keys/Verify.php

@@ -15,6 +15,7 @@ use OCP\IUserManager;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 
 class Verify extends Command {
@@ -34,6 +35,12 @@ class Verify extends Command {
 				InputArgument::REQUIRED,
 				'User ID of the user to verify'
 			)
+			->addOption(
+				'update',
+				null,
+				InputOption::VALUE_NONE,
+				'Save the derived public key to match the private key'
+			)
 		;
 	}
 
@@ -72,12 +79,17 @@ class Verify extends Command {
 		$output->writeln($publicKeyDerived);
 
 		if ($publicKey != $publicKeyDerived) {
-			$output->writeln('<error>Stored public key does not match stored private key</error>');
-			return static::FAILURE;
+			if (!$input->getOption('update')) {
+				$output->writeln('<error>Stored public key does not match stored private key</error>');
+				return static::FAILURE;
+			}
+
+			$this->keyManager->setPublicKey($user, $publicKeyDerived);
+			$output->writeln('<info>Derived public key did not match, successfully updated</info>');
+			return static::SUCCESS;
 		}
 
 		$output->writeln('<info>Stored public key matches stored private key</info>');
-
 		return static::SUCCESS;
 	}
 }

lib/private/Security/IdentityProof/Manager.php

@@ -135,6 +135,18 @@ class Manager {
 		return $this->retrieveKey('user-' . $uid);
 	}
 
+	/**
+	 * Set public key for $user
+	 */
+	public function setPublicKey(IUser $user, string $publicKey): void {
+		$id = 'user-' . $user->getUID();
+
+		$folder = $this->appData->getFolder($id);
+		$folder->newFile('public', $publicKey);
+
+		$this->cache->set($id . '-public', $publicKey);
+	}
+
 	/**
 	 * Get instance wide public and private key
 	 *

tests/lib/Security/IdentityProof/ManagerTest.php

@@ -153,6 +153,33 @@ class ManagerTest extends TestCase {
 		$this->assertEquals($expected, $this->manager->getKey($user));
 	}
 
+	public function testSetPublicKey(): void {
+		$user = $this->createMock(IUser::class);
+		$user
+			->expects($this->exactly(1))
+			->method('getUID')
+			->willReturn('MyUid');
+		$publicFile = $this->createMock(ISimpleFile::class);
+		$folder = $this->createMock(ISimpleFolder::class);
+		$folder
+			->expects($this->once())
+			->method('newFile')
+			->willReturnMap([
+				['public', 'MyNewPublicKey', $publicFile],
+			]);
+		$this->appData
+			->expects($this->once())
+			->method('getFolder')
+			->with('user-MyUid')
+			->willReturn($folder);
+		$this->cache
+			->expects($this->once())
+			->method('set')
+			->with('user-MyUid-public', 'MyNewPublicKey');
+
+		$this->manager->setPublicKey($user, 'MyNewPublicKey');
+	}
+
 	public function testGetKeyWithNotExistingKey(): void {
 		$user = $this->createMock(IUser::class);
 		$user