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86 lines
2.3 KiB
86 lines
2.3 KiB
/* |
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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 KEYSTORE_USER_STATE_H_ |
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#define KEYSTORE_USER_STATE_H_ |
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#include <sys/types.h> |
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#include <openssl/aes.h> |
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#include <utils/String8.h> |
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#include <keystore/keystore.h> |
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#include "entropy.h" |
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class UserState { |
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public: |
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explicit UserState(uid_t userId); |
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~UserState(); |
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bool initialize(); |
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uid_t getUserId() const { return mUserId; } |
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const char* getUserDirName() const { return mUserDir; } |
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const char* getMasterKeyFileName() const { return mMasterKeyFile; } |
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void setState(State state); |
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State getState() const { return mState; } |
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int8_t getRetry() const { return mRetry; } |
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void zeroizeMasterKeysInMemory(); |
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bool deleteMasterKey(); |
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ResponseCode initialize(const android::String8& pw, Entropy* entropy); |
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ResponseCode copyMasterKey(UserState* src); |
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ResponseCode copyMasterKeyFile(UserState* src); |
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ResponseCode writeMasterKey(const android::String8& pw, Entropy* entropy); |
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ResponseCode readMasterKey(const android::String8& pw, Entropy* entropy); |
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auto& getEncryptionKey() const { return mMasterKey; } |
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bool reset(); |
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private: |
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static const int MASTER_KEY_SIZE_BYTES = 16; |
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static const int MASTER_KEY_SIZE_BITS = MASTER_KEY_SIZE_BYTES * 8; |
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static const int MAX_RETRY = 4; |
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static const size_t SALT_SIZE = 16; |
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void generateKeyFromPassword(uint8_t* key, ssize_t keySize, const android::String8& pw, |
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uint8_t* salt); |
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bool generateSalt(Entropy* entropy); |
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bool generateMasterKey(Entropy* entropy); |
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void setupMasterKeys(); |
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uid_t mUserId; |
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char* mUserDir; |
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char* mMasterKeyFile; |
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State mState; |
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int8_t mRetry; |
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uint8_t mMasterKey[MASTER_KEY_SIZE_BYTES]; |
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uint8_t mSalt[SALT_SIZE]; |
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}; |
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#endif // KEYSTORE_USER_STATE_H_
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