| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/rand_util.h" |
| #include "base/rand_util_c.h" |
| |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| |
| // TODO(bbudge) Replace this with a proper system header file when NaCl |
| // provides one. |
| #include "native_client/src/untrusted/irt/irt.h" |
| |
| namespace { |
| |
| // Create a wrapper class so we can cache the NaCl random number interface. |
| class URandomInterface { |
| public: |
| URandomInterface() { |
| size_t result = nacl_interface_query(NACL_IRT_RANDOM_v0_1, |
| &interface_, |
| sizeof(interface_)); |
| DCHECK_EQ(result, sizeof(interface_)) << "Can't get random interface."; |
| } |
| |
| uint64 get_random_bytes() const { |
| size_t nbytes; |
| uint64 result; |
| int error = interface_.get_random_bytes(&result, |
| sizeof(result), |
| &nbytes); |
| DCHECK_EQ(error, 0); |
| DCHECK_EQ(nbytes, sizeof(result)); |
| return result; |
| } |
| |
| private: |
| struct nacl_irt_random interface_; |
| }; |
| |
| base::LazyInstance<URandomInterface> g_urandom_interface = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| namespace base { |
| |
| uint64 RandUint64() { |
| return g_urandom_interface.Pointer()->get_random_bytes(); |
| } |
| |
| } // namespace base |
| |