chore(encryption): Remove unused attribute $uid in KeyManager::getFileKey

It’s a private API in the application, no need to keep an unused
 attribute.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/encryption/lib/Command/DropLegacyFileKey.php

@@ -85,7 +85,7 @@ class DropLegacyFileKey extends Command {
 					$output->writeln('<error>' . $path . ' does not have a proper header</error>');
 				} else {
 					try {
-						$legacyFileKey = $this->keyManager->getFileKey($path, null, true);
+						$legacyFileKey = $this->keyManager->getFileKey($path, true);
 						if ($legacyFileKey === '') {
 							$output->writeln('Got an empty legacy filekey for ' . $path . ', continuing', OutputInterface::VERBOSITY_VERBOSE);
 							continue;

apps/encryption/lib/Crypto/Encryption.php

@@ -127,7 +127,7 @@ class Encryption implements IEncryptionModule {
 		/* If useLegacyFileKey is not specified in header, auto-detect, to be safe */
 		$useLegacyFileKey = (($header['useLegacyFileKey'] ?? '') == 'false' ? false : null);
 
-		$this->fileKey = $this->keyManager->getFileKey($this->path, null, $useLegacyFileKey, $this->session->decryptAllModeActivated());
+		$this->fileKey = $this->keyManager->getFileKey($this->path, $useLegacyFileKey, $this->session->decryptAllModeActivated());
 
 		// always use the version from the original file, also part files
 		// need to have a correct version number if they get moved over to the
@@ -335,7 +335,7 @@ class Encryption implements IEncryptionModule {
 			return false;
 		}
 
-		$fileKey = $this->keyManager->getFileKey($path, null, null);
+		$fileKey = $this->keyManager->getFileKey($path, null);
 
 		if (!empty($fileKey)) {
 			$publicKeys = [];
@@ -438,7 +438,7 @@ class Encryption implements IEncryptionModule {
 	 * @throws DecryptionFailedException
 	 */
 	public function isReadable($path, $uid) {
-		$fileKey = $this->keyManager->getFileKey($path, $uid, null);
+		$fileKey = $this->keyManager->getFileKey($path, null);
 		if (empty($fileKey)) {
 			$owner = $this->util->getOwner($path);
 			if ($owner !== $uid) {

apps/encryption/lib/KeyManager.php

@@ -349,10 +349,9 @@ class KeyManager {
 	}
 
 	/**
-	 * @param ?string $uid deprecated
 	 * @param ?bool $useLegacyFileKey null means try both
 	 */
-	public function getFileKey(string $path, ?string $uid, ?bool $useLegacyFileKey, bool $useDecryptAll = false): string {
+	public function getFileKey(string $path, ?bool $useLegacyFileKey, bool $useDecryptAll = false): string {
 		$publicAccess = ($this->keyUid === null);
 		$encryptedFileKey = '';
 		if ($useLegacyFileKey ?? true) {

apps/encryption/lib/Recovery.php

@@ -159,7 +159,7 @@ class Recovery {
 			if ($item['type'] === 'dir') {
 				$this->addRecoveryKeys($filePath . '/');
 			} else {
-				$fileKey = $this->keyManager->getFileKey($filePath, $this->user->getUID(), null);
+				$fileKey = $this->keyManager->getFileKey($filePath, null);
 				if (!empty($fileKey)) {
 					$accessList = $this->file->getAccessList($filePath);
 					$publicKeys = [];

apps/encryption/tests/Crypto/EncryptionTest.php

@@ -232,7 +232,7 @@ class EncryptionTest extends TestCase {
 			->willReturn(true);
 		$this->keyManagerMock->expects($this->once())
 			->method('getFileKey')
-			->with($path, null, null, true)
+			->with($path, null, true)
 			->willReturn($fileKey);
 
 		$this->instance->begin($path, 'user', 'r', [], []);

apps/encryption/tests/KeyManagerTest.php

@@ -417,7 +417,7 @@ class KeyManagerTest extends TestCase {
 		}
 
 		$this->assertSame($expected,
-			$this->instance->getFileKey($path, null, null)
+			$this->instance->getFileKey($path, null)
 		);
 	}