1 files changed, 37 insertions, 0 deletions
diff --git a/apps/files_external/3rdparty/icewind/streams/src/WriteHashWrapper.php b/apps/files_external/3rdparty/icewind/streams/src/WriteHashWrapper.php
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index 00000000000..279d9fd10e3
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+++ b/apps/files_external/3rdparty/icewind/streams/src/WriteHashWrapper.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * @copyright Copyright (c) 2019 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Icewind\Streams;
+
+/**
+ * Wrapper that calculates the hash on the stream on write
+ *
+ * The stream and hash should be passed in when wrapping the stream.
+ * On close the callback will be called with the calculated checksum.
+ *
+ * For supported hashes see: http://php.net/manual/en/function.hash-algos.php
+ */
+class WriteHashWrapper extends HashWrapper {
+	public function stream_write($data) {
+		$this->updateHash($data);
+		return parent::stream_write($data);
+	}
+}