Source/WebCore/platform/network/TimingAllowOrigin.cpp

/*
 * Copyright (C) 2021 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 "TimingAllowOrigin.h"

#include "HTTPParsers.h"
#include "ResourceResponse.h"
#include "SecurityOrigin.h"

namespace WebCore {

bool passesTimingAllowOriginCheck(const ResourceResponse& response, const SecurityOrigin& initiatorSecurityOrigin)
{
    // https://fetch.spec.whatwg.org/#tao-check
    auto resourceOrigin = SecurityOrigin::create(response.url());
    if (resourceOrigin->isSameSchemeHostPort(initiatorSecurityOrigin))
        return true;

    const auto& timingAllowOriginString = response.httpHeaderField(HTTPHeaderName::TimingAllowOrigin);
    const auto& securityOrigin = initiatorSecurityOrigin.toString();
    for (auto originWithSpace : StringView(timingAllowOriginString).split(',')) {
        auto origin = stripLeadingAndTrailingHTTPSpaces(originWithSpace);
        if (origin == "*" || origin == securityOrigin)
            return true;
    }

    return false;
}

}