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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "NetworkCacheData.h"
#include <fcntl.h>
#include <wtf/FileSystem.h>
#include <wtf/StdLibExtras.h>
#if !OS(WINDOWS)
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
namespace WebKit {
namespace NetworkCache {
Data Data::mapToFile(const String& path) const
{
FileSystem::PlatformFileHandle handle;
auto applyData = [&](NOESCAPE const Function<bool(std::span<const uint8_t>)>& applier) {
apply(applier);
};
auto mappedFile = FileSystem::mapToFile(path, size(), WTFMove(applyData), &handle);
if (!mappedFile)
return { };
return Data::adoptMap(WTFMove(mappedFile), handle);
}
Data mapFile(const String& path)
{
auto file = FileSystem::openFile(path, FileSystem::FileOpenMode::Read);
if (!FileSystem::isHandleValid(file))
return { };
auto size = FileSystem::fileSize(file);
if (!size) {
FileSystem::closeFile(file);
return { };
}
return adoptAndMapFile(file, 0, *size);
}
Data adoptAndMapFile(FileSystem::PlatformFileHandle handle, size_t offset, size_t size)
{
if (!size) {
FileSystem::closeFile(handle);
return Data::empty();
}
bool success;
FileSystem::MappedFileData mappedFile(handle, FileSystem::FileOpenMode::Read, FileSystem::MappedFileMode::Private, success);
if (!success) {
FileSystem::closeFile(handle);
return { };
}
return Data::adoptMap(WTFMove(mappedFile), handle);
}
SHA1::Digest computeSHA1(const Data& data, const Salt& salt)
{
SHA1 sha1;
sha1.addBytes(salt);
data.apply([&sha1](std::span<const uint8_t> span) {
sha1.addBytes(span);
return true;
});
SHA1::Digest digest;
sha1.computeHash(digest);
return digest;
}
bool bytesEqual(const Data& a, const Data& b)
{
if (a.isNull() || b.isNull())
return false;
return equalSpans(a.span(), b.span());
}
} // namespace NetworkCache
} // namespace WebKit
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