| // 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) |