blob: cf3062d0318a1aa1072f605769e4ce1e8e04276b [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(TARGET_OS_LINUX)
#include <errno.h> // NOLINT
#include <fcntl.h> // NOLINT
#include "bin/fdutils.h"
#include "bin/crypto.h"
#include "platform/signal_blocker.h"
namespace dart {
namespace bin {
bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) {
ThreadSignalBlocker signal_blocker(SIGPROF);
intptr_t fd = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
open("/dev/urandom", O_RDONLY));
if (fd < 0) return false;
intptr_t bytes_read = 0;
do {
int res = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
read(fd, buffer + bytes_read, count - bytes_read));
if (res < 0) {
int err = errno;
VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
errno = err;
return false;
}
bytes_read += res;
} while (bytes_read < count);
VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
return true;
}
} // namespace bin
} // namespace dart
#endif // defined(TARGET_OS_LINUX)