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/*
* 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 "CrossOriginEmbedderPolicy.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "HTTPHeaderNames.h"
#include "HTTPParsers.h"
#include "JSFetchRequest.h"
#include "PingLoader.h"
#include "ResourceResponse.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
namespace WebCore {
// https://html.spec.whatwg.org/multipage/origin.html#obtain-an-embedder-policy
CrossOriginEmbedderPolicy obtainCrossOriginEmbedderPolicy(const ResourceResponse& response, const ScriptExecutionContext* context)
{
auto parseCOEPHeader = [&response](HTTPHeaderName headerName, auto& value, auto& reportingEndpoint) {
auto coepParsingResult = parseStructuredFieldValue(response.httpHeaderField(headerName));
if (coepParsingResult && coepParsingResult->first == "require-corp"_s) {
value = CrossOriginEmbedderPolicyValue::RequireCORP;
reportingEndpoint = coepParsingResult->second.get<HashTranslatorASCIILiteral>("report-to"_s);
}
};
CrossOriginEmbedderPolicy policy;
if (context && !context->settingsValues().crossOriginEmbedderPolicyEnabled)
return policy;
if (!SecurityOrigin::create(response.url())->isPotentiallyTrustworthy())
return policy;
parseCOEPHeader(HTTPHeaderName::CrossOriginEmbedderPolicy, policy.value, policy.reportingEndpoint);
parseCOEPHeader(HTTPHeaderName::CrossOriginEmbedderPolicyReportOnly, policy.reportOnlyValue, policy.reportOnlyReportingEndpoint);
return policy;
}
CrossOriginEmbedderPolicy CrossOriginEmbedderPolicy::isolatedCopy() const &
{
return {
value,
reportingEndpoint.isolatedCopy(),
reportOnlyValue,
reportOnlyReportingEndpoint.isolatedCopy()
};
}
CrossOriginEmbedderPolicy CrossOriginEmbedderPolicy::isolatedCopy() &&
{
return {
value,
WTFMove(reportingEndpoint).isolatedCopy(),
reportOnlyValue,
WTFMove(reportOnlyReportingEndpoint).isolatedCopy()
};
}
void addCrossOriginEmbedderPolicyHeaders(ResourceResponse& response, const CrossOriginEmbedderPolicy& coep)
{
if (coep.value != CrossOriginEmbedderPolicyValue::UnsafeNone) {
ASSERT(coep.value == CrossOriginEmbedderPolicyValue::RequireCORP);
if (coep.reportingEndpoint.isEmpty())
response.setHTTPHeaderField(HTTPHeaderName::CrossOriginEmbedderPolicy, "require-corp"_s);
else
response.setHTTPHeaderField(HTTPHeaderName::CrossOriginEmbedderPolicy, makeString("require-corp; report-to=\"", coep.reportingEndpoint, '\"'));
}
if (coep.reportOnlyValue != CrossOriginEmbedderPolicyValue::UnsafeNone) {
ASSERT(coep.reportOnlyValue == CrossOriginEmbedderPolicyValue::RequireCORP);
if (coep.reportOnlyReportingEndpoint.isEmpty())
response.setHTTPHeaderField(HTTPHeaderName::CrossOriginEmbedderPolicyReportOnly, "require-corp"_s);
else
response.setHTTPHeaderField(HTTPHeaderName::CrossOriginEmbedderPolicyReportOnly, makeString("require-corp; report-to=\"", coep.reportOnlyReportingEndpoint, '\"'));
}
}
} // namespace WebCore
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