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Issue 1929703003: fuzzers for VerifyNameMatch and VerifyNameInSubtree (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: use FuzzedDataProvider Created 4 years, 7 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "net/base/fuzzed_data_provider.h" 5 #include "net/base/fuzzed_data_provider.h"
6 6
7 #include <algorithm> 7 #include <algorithm>
8 #include <limits> 8 #include <limits>
9 9
10 #include "base/logging.h" 10 #include "base/logging.h"
11 11
12 namespace net { 12 namespace net {
13 13
14 FuzzedDataProvider::FuzzedDataProvider(const uint8_t* data, size_t size) 14 FuzzedDataProvider::FuzzedDataProvider(const uint8_t* data, size_t size)
15 : remaining_data_(reinterpret_cast<const char*>(data), size) {} 15 : remaining_data_(reinterpret_cast<const char*>(data), size) {}
16 16
17 FuzzedDataProvider::~FuzzedDataProvider() {} 17 FuzzedDataProvider::~FuzzedDataProvider() {}
18 18
19 base::StringPiece FuzzedDataProvider::ConsumeBytes(size_t length) { 19 base::StringPiece FuzzedDataProvider::ConsumeBytes(size_t length) {
20 length = std::min(length, remaining_data_.length()); 20 length = std::min(length, remaining_data_.length());
21 base::StringPiece result(remaining_data_.data(), length); 21 base::StringPiece result(remaining_data_.data(), length);
22 remaining_data_ = remaining_data_.substr(length); 22 remaining_data_ = remaining_data_.substr(length);
23 return result; 23 return result;
24 } 24 }
25 25
26 base::StringPiece FuzzedDataProvider::ConsumeRemainingBytes() {
27 return ConsumeBytes(remaining_data_.length());
28 }
29
26 uint32_t FuzzedDataProvider::ConsumeValueInRange(uint32_t min, uint32_t max) { 30 uint32_t FuzzedDataProvider::ConsumeValueInRange(uint32_t min, uint32_t max) {
27 CHECK_LE(min, max); 31 CHECK_LE(min, max);
28 32
29 uint32_t range = max - min; 33 uint32_t range = max - min;
30 uint32_t offset = 0; 34 uint32_t offset = 0;
31 uint32_t result = 0; 35 uint32_t result = 0;
32 36
33 while ((range >> offset) > 0 && !remaining_data_.empty()) { 37 while ((range >> offset) > 0 && !remaining_data_.empty()) {
34 // Pull bytes off the end of the seed data. Experimentally, this seems to 38 // Pull bytes off the end of the seed data. Experimentally, this seems to
35 // allow the fuzzer to more easily explore the input space. This makes 39 // allow the fuzzer to more easily explore the input space. This makes
(...skipping 22 matching lines...) Expand all
58 return ConsumeValueInRange(0, std::numeric_limits<uint32_t>::max()); 62 return ConsumeValueInRange(0, std::numeric_limits<uint32_t>::max());
59 return ConsumeValueInRange(0, (1 << num_bits) - 1); 63 return ConsumeValueInRange(0, (1 << num_bits) - 1);
60 } 64 }
61 65
62 bool FuzzedDataProvider::ConsumeBool() { 66 bool FuzzedDataProvider::ConsumeBool() {
63 // Double negation so this returns false once there's no more data. 67 // Double negation so this returns false once there's no more data.
64 return !!ConsumeBits(1); 68 return !!ConsumeBits(1);
65 } 69 }
66 70
67 } // namespace net 71 } // namespace net
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