1 // Copyright 2012 The Chromium Authors 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 <nacl/nacl_random.h> 8 #include <stddef.h> 9 #include <stdint.h> 10 11 #include "base/check_op.h" 12 #include "base/containers/span.h" 13 14 namespace base { 15 RandBytes(span<uint8_t> output)16void RandBytes(span<uint8_t> output) { 17 while (!output.empty()) { 18 size_t nread; 19 const int error = nacl_secure_random(output.data(), output.size(), &nread); 20 CHECK_EQ(error, 0); 21 CHECK_LE(nread, output.size()); 22 output = output.subspan(nread); 23 } 24 } 25 26 } // namespace base 27