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cc2d5adec9
Change-Id: I90ff8585408078e12bf732f6669cf3f9d149495a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/102205 Reviewed-by: Jonas Termansen <sortie@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(HOST_OS_LINUX)
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#include <errno.h> // NOLINT
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#include <fcntl.h> // NOLINT
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#include "bin/crypto.h"
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#include "bin/fdutils.h"
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#include "platform/signal_blocker.h"
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namespace dart {
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namespace bin {
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bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) {
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ThreadSignalBlocker signal_blocker(SIGPROF);
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intptr_t fd = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
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open("/dev/urandom", O_RDONLY | O_CLOEXEC));
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if (fd < 0) {
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return false;
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}
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intptr_t bytes_read = 0;
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do {
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int res = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
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read(fd, buffer + bytes_read, count - bytes_read));
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if (res < 0) {
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int err = errno;
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close(fd);
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errno = err;
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return false;
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}
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bytes_read += res;
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} while (bytes_read < count);
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close(fd);
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return true;
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(HOST_OS_LINUX)
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