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diff --git a/crypto/ext4crypt/Weaver1.h b/crypto/ext4crypt/Weaver1.h
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+++ b/crypto/ext4crypt/Weaver1.h
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+/*
+ * Copyright (C) 2017 Team Win Recovery Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* To the best of my knowledge there is no native implementation for
+ * Weaver so I made this by looking at the IWeaver.h file that gets
+ * compiled by the build system. I took the information from this header
+ * file and looked at keymaster source to get an idea of the proper way
+ * to write the functions.
+ */
+
+#ifndef TWRP_WEAVER_H
+#define TWRP_WEAVER_H
+
+#include <memory>
+#include <string>
+#include <utility>
+
+#include <android/hardware/weaver/1.0/IWeaver.h>
+#include "Utils.h"
+
+namespace android {
+namespace vold {
+using ::android::hardware::weaver::V1_0::IWeaver;
+
+// Wrapper for a Weaver device
+class Weaver {
+	public:
+		Weaver();
+		// false if we failed to open the weaver device.
+		explicit operator bool() { return mDevice.get() != nullptr; }
+
+		bool GetSlots(uint32_t* slots);
+		bool GetKeySize(uint32_t* keySize);
+		bool GetValueSize(uint32_t* valueSize);
+		// TODO: we should return more information about the status including time delays before the next retry
+		bool WeaverVerify(const uint32_t slot, const void* weaver_key, std::vector<uint8_t>* payload);
+
+	private:
+		sp<hardware::weaver::V1_0::IWeaver> mDevice;
+		hardware::weaver::V1_0::WeaverConfig config;
+		bool GottenConfig;
+
+		bool GetConfig();
+
+		DISALLOW_COPY_AND_ASSIGN(Weaver);
+};
+
+}  // namespace vold
+}  // namespace android
+
+#endif