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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "base/rand_util.h" | |
6 | |
7 #include "base/basictypes.h" | |
8 #include "base/lazy_instance.h" | |
9 #include "base/logging.h" | |
10 #include "native_client/src/untrusted/irt/irt.h" | |
11 | |
12 namespace { | |
13 | |
14 class NaclRandom { | |
15 public: | |
16 NaclRandom() { | |
17 size_t result = nacl_interface_query(NACL_IRT_RANDOM_v0_1, | |
18 &random_, sizeof(random_)); | |
willchan no longer on Chromium
2012/07/25 20:19:27
indentation is off now :P
Sergey Ulanov
2012/07/25 20:34:48
Done.
| |
19 CHECK_EQ(result, sizeof(random_)); | |
20 } | |
21 | |
22 ~NaclRandom() { | |
23 } | |
24 | |
25 void GetRandomBytes(char* buffer, uint32_t num_bytes) { | |
26 while (num_bytes > 0) { | |
27 size_t nread; | |
28 int error = random_.get_random_bytes(buffer, num_bytes, &nread); | |
29 CHECK_EQ(error, 0); | |
30 CHECK_LE(nread, num_bytes); | |
31 buffer += nread; | |
32 num_bytes -= nread; | |
33 } | |
34 } | |
35 | |
36 private: | |
37 nacl_irt_random random_; | |
38 }; | |
39 | |
40 base::LazyInstance<NaclRandom>::Leaky g_nacl_random = LAZY_INSTANCE_INITIALIZER; | |
41 | |
42 } // namespace | |
43 | |
44 namespace base { | |
45 | |
46 uint64 RandUint64() { | |
47 uint64 result; | |
48 g_nacl_random.Pointer()->GetRandomBytes( | |
49 reinterpret_cast<char*>(&result), sizeof(result)); | |
50 return result; | |
51 } | |
52 | |
53 } // namespace base | |
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