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49 lines
1.3 KiB
49 lines
1.3 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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#define LOG_TAG "keystore" |
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#include "entropy.h" |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <cutils/log.h> |
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#include "keystore_utils.h" |
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Entropy::~Entropy() { |
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if (mRandom >= 0) { |
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close(mRandom); |
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} |
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} |
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bool Entropy::open() { |
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const char* randomDevice = "/dev/urandom"; |
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mRandom = TEMP_FAILURE_RETRY(::open(randomDevice, O_RDONLY)); |
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if (mRandom < 0) { |
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ALOGE("open: %s: %s", randomDevice, strerror(errno)); |
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return false; |
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} |
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return true; |
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} |
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bool Entropy::generate_random_data(uint8_t* data, size_t size) const { |
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return (readFully(mRandom, data, size) == size); |
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}
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