| // Copyright (c) 2016, 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(HOST_OS_FUCHSIA) |
| |
| #include "bin/crypto.h" |
| |
| #include <zircon/syscalls.h> |
| |
| namespace dart { |
| namespace bin { |
| |
| bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) { |
| intptr_t read = 0; |
| while (read < count) { |
| const intptr_t remaining = count - read; |
| const intptr_t len = |
| (ZX_CPRNG_DRAW_MAX_LEN < remaining) ? ZX_CPRNG_DRAW_MAX_LEN : remaining; |
| size_t res = 0; |
| const zx_status_t status = zx_cprng_draw(buffer + read, len, &res); |
| if (status != ZX_OK) { |
| return false; |
| } |
| read += res; |
| } |
| return true; |
| } |
| |
| } // namespace bin |
| } // namespace dart |
| |
| #endif // defined(HOST_OS_FUCHSIA) |