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ladybird/Libraries/LibWeb/HTML/PolicyContainers.cpp
Shannon Booth 8a3c66d8a6 LibWeb: Make a bunch of CSP classes not realm associated
These are not associated with a javascript realm, so to avoid
confusion about which realm these need to be created in, make
all of these objects a GC::Cell, and deal with the fallout.
2025-04-28 12:41:28 +02:00

105 lines
4 KiB
C++

/*
* Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
* Copyright (c) 2025, Luke Wilde <luke@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Realm.h>
#include <LibURL/URL.h>
#include <LibWeb/ContentSecurityPolicy/Policy.h>
#include <LibWeb/ContentSecurityPolicy/PolicyList.h>
#include <LibWeb/Fetch/Infrastructure/HTTP/Responses.h>
#include <LibWeb/Fetch/Infrastructure/URL.h>
#include <LibWeb/HTML/PolicyContainers.h>
#include <LibWeb/HTML/SerializedPolicyContainer.h>
namespace Web::HTML {
GC_DEFINE_ALLOCATOR(PolicyContainer);
PolicyContainer::PolicyContainer(GC::Heap& heap)
: csp_list(heap.allocate<ContentSecurityPolicy::PolicyList>())
{
}
// https://html.spec.whatwg.org/multipage/browsers.html#requires-storing-the-policy-container-in-history
bool url_requires_storing_the_policy_container_in_history(URL::URL const& url)
{
// 1. If url's scheme is "blob", then return false.
if (url.scheme() == "blob"sv)
return false;
// 2. If url is local, then return true.
// 3. Return false.
return Fetch::Infrastructure::is_local_url(url);
}
// https://html.spec.whatwg.org/multipage/browsers.html#creating-a-policy-container-from-a-fetch-response
GC::Ref<PolicyContainer> create_a_policy_container_from_a_fetch_response(GC::Heap& heap, GC::Ref<Fetch::Infrastructure::Response const> response, GC::Ptr<Environment>)
{
// FIXME: 1. If response's URL's scheme is "blob", then return a clone of response's URL's blob URL entry's
// environment's policy container.
// 2. Let result be a new policy container.
GC::Ref<PolicyContainer> result = heap.allocate<PolicyContainer>(heap);
// 3. Set result's CSP list to the result of parsing a response's Content Security Policies given response.
result->csp_list = ContentSecurityPolicy::Policy::parse_a_responses_content_security_policies(heap, response);
// FIXME: 4. If environment is non-null, then set result's embedder policy to the result of obtaining an embedder
// policy given response and environment. Otherwise, set it to "unsafe-none".
// FIXME: 5. Set result's referrer policy to the result of parsing the `Referrer-Policy` header given response.
// [REFERRERPOLICY]
// Doing this currently makes Fetch fail the policy != ReferrerPolicy::EmptyString verification.
// 6. Return result.
return result;
}
GC::Ref<PolicyContainer> create_a_policy_container_from_serialized_policy_container(GC::Heap& heap, SerializedPolicyContainer const& serialized_policy_container)
{
GC::Ref<PolicyContainer> result = heap.allocate<PolicyContainer>(heap);
result->csp_list = ContentSecurityPolicy::PolicyList::create(heap, serialized_policy_container.csp_list);
result->embedder_policy = serialized_policy_container.embedder_policy;
result->referrer_policy = serialized_policy_container.referrer_policy;
return result;
}
// https://html.spec.whatwg.org/multipage/browsers.html#clone-a-policy-container
GC::Ref<PolicyContainer> PolicyContainer::clone(GC::Heap& heap) const
{
// 1. Let clone be a new policy container.
auto clone = heap.allocate<PolicyContainer>(heap);
// 2. For each policy in policyContainer's CSP list, append a copy of policy into clone's CSP list.
clone->csp_list = csp_list->clone(heap);
// 3. Set clone's embedder policy to a copy of policyContainer's embedder policy.
// NOTE: This is a C++ copy.
clone->embedder_policy = embedder_policy;
// 4. Set clone's referrer policy to policyContainer's referrer policy.
clone->referrer_policy = referrer_policy;
// 5. Return clone.
return clone;
}
SerializedPolicyContainer PolicyContainer::serialize() const
{
return SerializedPolicyContainer {
.csp_list = csp_list->serialize(),
.embedder_policy = embedder_policy,
.referrer_policy = referrer_policy,
};
}
void PolicyContainer::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(csp_list);
}
}