49 lines
1.3 KiB
C++
49 lines
1.3 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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#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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