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572ebe00ea
Previously, navigating to or from `about:newtab` caused a crash due to inadvertent null dereferences when checking whether a request or response to a request should be blocked as mixed content.
116 lines
6.7 KiB
C++
116 lines
6.7 KiB
C++
/*
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* Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Fetch/Response.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/MixedContent/AbstractOperations.h>
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#include <LibWeb/SecureContexts/AbstractOperations.h>
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namespace Web::MixedContent {
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// https://w3c.github.io/webappsec-mixed-content/#upgrade-algorithm
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void upgrade_a_mixed_content_request_to_a_potentially_trustworthy_url_if_appropriate(Fetch::Infrastructure::Request& request)
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{
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// 1. If one or more of the following conditions is met, return without modifying request:
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if (
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// 1. request’s URL is a potentially trustworthy URL.
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SecureContexts::is_url_potentially_trustworthy(request.url()) == SecureContexts::Trustworthiness::PotentiallyTrustworthy
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// 2. request’s URL’s host is an IP address.
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|| request.url().host().has<URL::IPv4Address>() || request.url().host().has<URL::IPv6Address>()
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// 3. § 4.3 Does settings prohibit mixed security contexts? returns "Does Not Restrict Mixed Security Contents" when applied to request’s client.
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|| does_settings_prohibit_mixed_security_contexts(request.client()) == ProhibitsMixedSecurityContexts::DoesNotRestrictMixedSecurityContexts
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// 4. request’s destination is not "image", "audio", or "video".
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|| (request.destination() != Fetch::Infrastructure::Request::Destination::Image
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&& request.destination() != Fetch::Infrastructure::Request::Destination::Audio
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&& request.destination() != Fetch::Infrastructure::Request::Destination::Video)
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// 5. request’s destination is "image" and request’s initiator is "imageset".
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|| (request.destination() == Fetch::Infrastructure::Request::Destination::Image
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&& request.initiator() == Fetch::Infrastructure::Request::Initiator::ImageSet)) {
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return;
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}
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// 2. If request’s URL’s scheme is http, set request’s URL’s scheme to https, and return.
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if (request.url().scheme() == "http")
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request.url().set_scheme("https"_string);
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}
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// https://w3c.github.io/webappsec-mixed-content/#categorize-settings-object
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ProhibitsMixedSecurityContexts does_settings_prohibit_mixed_security_contexts(JS::GCPtr<HTML::EnvironmentSettingsObject> settings)
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{
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// 1. If settings’ origin is a potentially trustworthy origin, then return "Prohibits Mixed Security Contexts".
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if (SecureContexts::is_origin_potentially_trustworthy(settings->origin()) == SecureContexts::Trustworthiness::PotentiallyTrustworthy)
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return ProhibitsMixedSecurityContexts::ProhibitsMixedSecurityContexts;
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// 2. If settings’ global object is a window, then:
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if (is<HTML::Window>(settings->global_object())) {
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// 1. Set document to settings’ global object's associated Document.
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auto document = verify_cast<HTML::Window>(settings->global_object()).document();
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// 2. For each navigable navigable in document’s ancestor navigables:
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for (auto const& navigable : document->ancestor_navigables()) {
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// 1. If navigable’s active document's origin is a potentially trustworthy origin, then return "Prohibits Mixed Security Contexts".
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if (SecureContexts::is_origin_potentially_trustworthy(navigable->active_document()->origin()) == SecureContexts::Trustworthiness::PotentiallyTrustworthy)
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return ProhibitsMixedSecurityContexts::ProhibitsMixedSecurityContexts;
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}
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}
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// 3. Return "Does Not Restrict Mixed Security Contexts".
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return ProhibitsMixedSecurityContexts::DoesNotRestrictMixedSecurityContexts;
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}
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// https://w3c.github.io/webappsec-mixed-content/#should-block-fetch
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Fetch::Infrastructure::RequestOrResponseBlocking should_fetching_request_be_blocked_as_mixed_content(Fetch::Infrastructure::Request& request)
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{
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// 1. Return allowed if one or more of the following conditions are met:
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if (
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// 1. § 4.3 Does settings prohibit mixed security contexts? returns "Does Not Restrict Mixed Security Contexts" when applied to request’s client.
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does_settings_prohibit_mixed_security_contexts(request.client()) == ProhibitsMixedSecurityContexts::DoesNotRestrictMixedSecurityContexts
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// 2. request’s URL is a potentially trustworthy URL.
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|| SecureContexts::is_url_potentially_trustworthy(request.url()) == SecureContexts::Trustworthiness::PotentiallyTrustworthy
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// FIXME: 3. The user agent has been instructed to allow mixed content, as described in § 7.2 User Controls).
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|| false
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// 4. request’s destination is "document", and request’s target browsing context has no parent browsing context.
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|| (request.destination() == Fetch::Infrastructure::Request::Destination::Document && !(request.client()->target_browsing_context && request.client()->target_browsing_context->parent()))) {
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return Fetch::Infrastructure::RequestOrResponseBlocking::Allowed;
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}
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// 2. Return blocked.
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dbgln("MixedContent: Blocked '{}' (request)", MUST(request.url().to_string()));
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return Fetch::Infrastructure::RequestOrResponseBlocking::Blocked;
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}
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// https://w3c.github.io/webappsec-mixed-content/#should-block-response
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Web::Fetch::Infrastructure::RequestOrResponseBlocking should_response_to_request_be_blocked_as_mixed_content(Fetch::Infrastructure::Request& request, JS::NonnullGCPtr<Fetch::Infrastructure::Response>& response)
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{
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// 1. Return allowed if one or more of the following conditions are met:
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if (
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// 1. § 4.3 Does settings prohibit mixed security contexts? returns Does Not Restrict Mixed Content when applied to request’s client.
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does_settings_prohibit_mixed_security_contexts(request.client()) == ProhibitsMixedSecurityContexts::DoesNotRestrictMixedSecurityContexts
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// 2. response’s url is a potentially trustworthy URL.
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|| (response->url().has_value() && SecureContexts::is_url_potentially_trustworthy(response->url().value()) == SecureContexts::Trustworthiness::PotentiallyTrustworthy)
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// FIXME: 3. The user agent has been instructed to allow mixed content, as described in § 7.2 User Controls).
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|| false
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// 4. request’s destination is "document", and request’s target browsing context has no parent browsing context.
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|| (request.destination() == Fetch::Infrastructure::Request::Destination::Document && !(request.client()->target_browsing_context && request.client()->target_browsing_context->parent()))) {
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return Fetch::Infrastructure::RequestOrResponseBlocking::Allowed;
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}
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// 2. Return blocked.
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dbgln("MixedContent: Blocked '{}' (response to request)", MUST(request.url().to_string()));
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return Fetch::Infrastructure::RequestOrResponseBlocking::Blocked;
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}
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}
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