86 lines
2.3 KiB
C++
86 lines
2.3 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 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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