77df7f207d
Test: Boots, no bad log messages: Cuttlefish with v2 policies, Taimen Bug: 147733587 Change-Id: Ice4acac3236b6b7d90e60a2f57b46814aa1949f5
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_VOLD_KEYUTIL_H
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#define ANDROID_VOLD_KEYUTIL_H
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#include "KeyBuffer.h"
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#include "KeyStorage.h"
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#include <fscrypt/fscrypt.h>
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#include <memory>
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#include <string>
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namespace android {
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namespace vold {
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using namespace android::fscrypt;
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bool randomKey(KeyBuffer* key);
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bool isFsKeyringSupported(void);
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// Install a file-based encryption key to the kernel, for use by encrypted files
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// on the specified filesystem using the specified encryption policy version.
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//
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// For v1 policies, we use FS_IOC_ADD_ENCRYPTION_KEY if the kernel supports it.
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// Otherwise we add the key to the legacy global session keyring.
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//
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// For v2 policies, we always use FS_IOC_ADD_ENCRYPTION_KEY; it's the only way
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// the kernel supports.
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//
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// Returns %true on success, %false on failure. On success also sets *policy
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// to the EncryptionPolicy used to refer to this key.
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bool installKey(const std::string& mountpoint, const EncryptionOptions& options,
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const KeyBuffer& key, EncryptionPolicy* policy);
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// Evict a file-based encryption key from the kernel.
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//
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// We use FS_IOC_REMOVE_ENCRYPTION_KEY if the kernel supports it. Otherwise we
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// remove the key from the legacy global session keyring.
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//
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// In the latter case, the caller is responsible for dropping caches.
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bool evictKey(const std::string& mountpoint, const EncryptionPolicy& policy);
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bool retrieveKey(bool create_if_absent, const KeyAuthentication& key_authentication,
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const std::string& key_path, const std::string& tmp_path, KeyBuffer* key,
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bool keepOld = true);
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} // namespace vold
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} // namespace android
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#endif
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