/src/uriparser/fuzz/ParseFuzzer.cpp

Source
// Copyright 2020 Google LLC
// Copyright 2025 Mikhail Khachaiants <mkhachaiants@gmail.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "uriparser/Uri.h"
#include "uriparser/UriIp4.h"
#include "FuzzingUtils.h"
#include <cstddef>
#include <cstring>
#include <vector>



class UriHolder {
public:
  UriHolder() {
    memset((void *)&uri_, 0, sizeof(uri_));
  }

  ~UriHolder() {
    URI_FUNC(FreeUriMembers)(&uri_);
  }

  URI_TYPE(Uri) * get() {
    return &uri_;
  }

private:
  URI_TYPE(Uri) uri_;
};



void Escapes(const UriString & uri) {
  const URI_CHAR * first = uri.c_str();
  // Up to 6 bytes per character with normalizeBreaks enabled (\n -> %0D%0A)
  std::vector<URI_CHAR> buf1(uri.size() * 6 + 1);
  // and up to 3 bytes per character otherwise
  std::vector<URI_CHAR> buf2(uri.size() * 3 + 1);

  URI_CHAR * result;
  result = URI_FUNC(Escape)(first, &buf1[0], URI_TRUE, URI_TRUE);
  result = URI_FUNC(Escape)(first, &buf1[0], URI_FALSE, URI_TRUE);
  if (buf1.data()) {
    URI_FUNC(UnescapeInPlace)(&buf1[0]);
  }

  result = URI_FUNC(Escape)(first, &buf2[0], URI_TRUE, URI_FALSE);
  result = URI_FUNC(Escape)(first, &buf2[0], URI_FALSE, URI_FALSE);
  if (buf2.data()) {
    URI_FUNC(UnescapeInPlace)(&buf2[0]);
  }
}



void FileNames(const UriString & uri) {
  const size_t size = 8 + 3 * uri.size() + 1;
  std::vector<URI_CHAR> buf(size);

  URI_FUNC(UnixFilenameToUriString)(uri.c_str(), &buf[0]);
  URI_FUNC(WindowsFilenameToUriString)(uri.c_str(), &buf[0]);
  URI_FUNC(UriStringToUnixFilename)(uri.c_str(), &buf[0]);
  URI_FUNC(UriStringToWindowsFilename)(uri.c_str(), &buf[0]);
}



void Ipv4(const UriString & s) {
  const URI_CHAR * cstr = s.c_str();
  unsigned char result[4] = {};
  URI_FUNC(ParseIpFourAddress)(result, cstr, &cstr[s.size()]);
}



extern "C" int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size) {
  FuzzedDataProvider stream(data, size);
  bool domainRelative = stream.ConsumeBool();

  const UriString uri1 = consumeRandomLengthString(stream);
  const UriString uri2 = consumeRemainingBytesAsString(stream);

  Escapes(uri1);
  Escapes(uri2);

  FileNames(uri1);
  FileNames(uri2);

  Ipv4(uri1);
  Ipv4(uri2);

  UriHolder uriHolder1;
  URI_TYPE(ParserState) state1;
  state1.uri = uriHolder1.get();
  if (URI_FUNC(ParseUri)(&state1, uri1.c_str()) != URI_SUCCESS) {
    return 0;
  }

  URI_CHAR buf[1024 * 8] = {0};
  int written = 0;
  URI_FUNC(ToString)(buf, state1.uri, sizeof(buf) / sizeof(buf[0]), &written);

  UriHolder uriHolder2;
  if (URI_FUNC(ParseSingleUri)(uriHolder2.get(), uri2.c_str(), nullptr) != URI_SUCCESS) {
    return 0;
  }

  URI_FUNC(EqualsUri)(state1.uri, uriHolder2.get());

  unsigned int mask = 0;
  URI_FUNC(NormalizeSyntaxMaskRequiredEx)(state1.uri, &mask);
  URI_FUNC(NormalizeSyntax)(state1.uri);

  URI_TYPE(Uri) absUri;
  URI_FUNC(AddBaseUri)(&absUri, state1.uri, uriHolder2.get());
  URI_FUNC(FreeUriMembers)(&absUri);

  URI_TYPE(Uri) relUri;
  URI_FUNC(RemoveBaseUri)(&relUri, state1.uri, uriHolder2.get(), domainRelative);
  URI_FUNC(FreeUriMembers)(&relUri);

  return 0;
}

Coverage Report

Created: 2025-07-12 06:52