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/*
* Copyright (C) 2025 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 "NavigatorUAData.h"
#include "JSUADataValues.h"
#include "NavigatorUABrandVersion.h"
#include "NotImplemented.h"
#include "UADataValues.h"
#include "UALowEntropyJSON.h"
#include "UserAgent.h"
#include "UserAgentStringData.h"
#include "page/UserAgentStringData.h"
#include <algorithm>
#include <random>
#include <wtf/NeverDestroyed.h>
#include <wtf/WeakRandomNumber.h>
#include <wtf/text/WTFString.h>
#if USE(GLIB)
#include <wtf/glib/ChassisType.h>
#endif
#if OS(LINUX)
#include "sys/utsname.h"
#include <wtf/StdLibExtras.h>
#endif
#if PLATFORM(IOS_FAMILY)
#import <pal/system/ios/Device.h>
#import <pal/system/ios/UserInterfaceIdiom.h>
#endif
namespace WebCore {
NavigatorUAData::NavigatorUAData() = default;
NavigatorUAData::~NavigatorUAData() = default;
NavigatorUAData::NavigatorUAData(Ref<UserAgentStringData>&& userAgentStringData)
{
overrideFromUserAgentString = true;
mobileOverride = userAgentStringData->mobile;
static std::once_flag onceKey;
std::call_once(onceKey, [userAgentStringData] {
Vector<NavigatorUABrandVersion> temp = {
NavigatorUABrandVersion {
.brand = userAgentStringData->browserName,
.version = userAgentStringData->browserVersion },
NavigatorUABrandVersion {
.brand = createArbitraryBrand(),
.version = createArbitraryVersion() }
};
auto rng = std::default_random_engine { };
std::ranges::shuffle(temp, rng);
NavigatorUAData::m_brands.construct(temp);
});
platformOverride = userAgentStringData->platform;
}
Ref<NavigatorUAData> NavigatorUAData::create()
{
return adoptRef(*new NavigatorUAData());
}
Ref<NavigatorUAData> NavigatorUAData::create(Ref<UserAgentStringData>&& userAgentStringData)
{
return adoptRef(*new NavigatorUAData(WTFMove(userAgentStringData)));
}
const Vector<NavigatorUABrandVersion>& NavigatorUAData::brands() const
{
if (overrideFromUserAgentString)
return NavigatorUAData::m_brands;
static NeverDestroyed<Vector<NavigatorUABrandVersion>> brandVersion = [] {
Vector<NavigatorUABrandVersion> temp = {
NavigatorUABrandVersion {
.brand = "AppleWebKit"_s,
.version = "605.1.15"_s },
NavigatorUABrandVersion {
.brand = createArbitraryBrand(),
.version = createArbitraryVersion() }
};
auto rng = std::default_random_engine { };
std::ranges::shuffle(temp, rng);
return temp;
}();
return brandVersion;
}
bool NavigatorUAData::mobile() const
{
if (overrideFromUserAgentString)
return mobileOverride;
#if PLATFORM(IOS_FAMILY)
return !(PAL::currentUserInterfaceIdiomIsDesktop() || PAL::currentUserInterfaceIdiomIsVision());
#elif USE(GLIB)
return chassisType() == WTF::ChassisType::Mobile;
#else
return false;
#endif
}
String NavigatorUAData::platform() const
{
if (overrideFromUserAgentString)
return platformOverride;
#if OS(LINUX)
static NeverDestroyed<String> platformName = [] {
struct utsname osname;
return uname(&osname) >= 0 ? makeString(unsafeSpan(osname.sysname)) : emptyString();
}();
return platformName->isolatedCopy();
#elif PLATFORM(IOS_FAMILY)
return (PAL::currentUserInterfaceIdiomIsDesktop() || PAL::currentUserInterfaceIdiomIsVision()) ? "macOS"_s : "iOS"_s;
#elif OS(MACOS)
return "macOS"_s;
#else
return ""_s;
#endif
}
UALowEntropyJSON NavigatorUAData::toJSON() const
{
return UALowEntropyJSON {
brands(),
mobile(),
platform()
};
}
void NavigatorUAData::getHighEntropyValues(const Vector<String>& hints, NavigatorUAData::ValuesPromise&& promise) const
{
auto values = UADataValues::create(brands(), mobile(), platform());
if (overrideFromUserAgentString) {
// if the user agent string has been overridden, we should not expose high entropy values
promise.resolve(values);
return;
}
for (auto& hint : hints) {
if (hint == "architecture")
values->architecture = ""_s;
else if (hint == "bitness")
values->bitness = "64"_s;
else if (hint == "formFactors")
values->formFactors = Vector<String> { };
else if (hint == "fullVersionList")
values->fullVersionList = brands();
else if (hint == "model")
values->model = ""_s;
else if (hint == "platformVersion") {
#if OS(LINUX)
values->platformVersion = ""_s;
#elif PLATFORM(IOS_FAMILY)
values->platformVersion = systemMarketingVersionForUserAgentString();
#elif OS(MACOS)
values->platformVersion = "10.15.7"_s;
#else
values->platformVersion = ""_s;
#endif
} else if (hint == "uaFullVersion")
values->uaFullVersion = "605.1.15"_s;
else if (hint == "wow64")
values->wow64 = false;
}
promise.resolve(WTFMove(values));
}
String NavigatorUAData::createArbitraryVersion()
{
return makeString(weakRandomNumber<unsigned>() % 10000, '.', weakRandomNumber<unsigned>() % 10000, '.', weakRandomNumber<unsigned>() % 10000);
}
String NavigatorUAData::createArbitraryBrand()
{
auto greasyChars = unsafeSpan(" ()-./:;=?_");
return makeString("The"_s, greasyChars[weakRandomNumber<unsigned>() % greasyChars.size()], "Best"_s, greasyChars[weakRandomNumber<unsigned>() % greasyChars.size()], "Browser"_s);
}
}
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