0572080814
Added a new call change_user_key which changes the way that disk encryption keys are protected; a key can now be protected with a combination of an auth token and a secret which is a hashed password. Both of these are passed to unlock_user_key. This change introduces a security bug, b/26948053, which must be fixed before we ship. Bug: 22950892 Change-Id: Iac1e45bb6f86f2af5c472c70a0fe3228b02115bf
53 lines
1.8 KiB
C++
53 lines
1.8 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_KEYSTORAGE_H
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#define ANDROID_VOLD_KEYSTORAGE_H
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#include <string>
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namespace android {
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namespace vold {
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// Represents the information needed to decrypt a disk encryption key.
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// If "token" is nonempty, it is passed in as a required Gatekeeper auth token.
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// If "secret" is nonempty, it is appended to the application-specific
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// binary needed to unlock.
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class KeyAuthentication {
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public:
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KeyAuthentication(std::string t, std::string s): token {t}, secret {s} {};
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const std::string token;
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const std::string secret;
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};
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extern const KeyAuthentication kEmptyAuthentication;
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// Create a directory at the named path, and store "key" in it,
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// in such a way that it can only be retrieved via Keymaster and
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// can be securely deleted.
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// It's safe to move/rename the directory after creation.
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bool storeKey(const std::string &dir, const KeyAuthentication &auth, const std::string &key);
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// Retrieve the key from the named directory.
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bool retrieveKey(const std::string &dir, const KeyAuthentication &auth, std::string &key);
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// Securely destroy the key stored in the named directory and delete the directory.
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bool destroyKey(const std::string &dir);
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} // namespace vold
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} // namespace android
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#endif
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