cd8bfe3d7f
We don't know which FS and kernel version is going to want these keys, so put them in the kernel three times with all three possible prefixes. Test: Marlin set up before this change successfully boots after it. Change-Id: I6ccfe0894551ba068de9bf5e23fe4fd1e10e36b1
50 lines
1.6 KiB
C++
50 lines
1.6 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 <string>
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namespace android {
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namespace vold {
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// ext4enc:TODO get this const from somewhere good
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const int EXT4_KEY_DESCRIPTOR_SIZE = 8;
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// ext4enc:TODO Include structure from somewhere sensible
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// MUST be in sync with ext4_crypto.c in kernel
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constexpr int EXT4_ENCRYPTION_MODE_AES_256_XTS = 1;
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constexpr int EXT4_AES_256_XTS_KEY_SIZE = 64;
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constexpr int EXT4_MAX_KEY_SIZE = 64;
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struct ext4_encryption_key {
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uint32_t mode;
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char raw[EXT4_MAX_KEY_SIZE];
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uint32_t size;
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};
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bool randomKey(std::string* key);
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bool installKey(const std::string& key, std::string* raw_ref);
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bool evictKey(const std::string& raw_ref);
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bool retrieveAndInstallKey(bool create_if_absent, const std::string& key_path,
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const std::string& tmp_path, std::string* key_ref);
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bool retrieveKey(bool create_if_absent, const std::string& key_path,
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const std::string& tmp_path, std::string* key);
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} // namespace vold
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} // namespace android
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#endif
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