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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/sanitizer/sanitizer_api.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_set_html_options.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_set_html_unsafe_options.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_union_sanitizer_sanitizerconfig_sanitizerpresets.h"
#include "third_party/blink/renderer/core/dom/container_node.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/sanitizer/sanitizer.h"
#include "third_party/blink/renderer/core/sanitizer/sanitizer_builtins.h"
#include "third_party/blink/renderer/core/svg_names.h"
namespace blink {
// Note: SanitizerSafeInternal and SanitizerUnsafeInternal are mostly identical.
// But because SetHTMLOptions and SetHTMLUnsafeOptions are unrelated types (as
// far as C++ is concerned) they cannot easily be merged.
void SanitizerAPI::SanitizeSafeInternal(ContainerNode* element,
SetHTMLOptions* options,
ExceptionState& exception_state) {
if (exception_state.HadException()) {
element->setTextContent("");
return;
}
if (element->IsElementNode()) {
const Element* real_element = To<Element>(element);
if (real_element->TagQName() == html_names::kScriptTag ||
real_element->TagQName() == svg_names::kScriptTag) {
element->setTextContent("");
return;
}
}
const Sanitizer* sanitizer = nullptr;
if (!options || !options->hasSanitizer()) {
// Default case: No dictionary, or dictionary without 'sanitizer' member.
sanitizer = Sanitizer::Create(nullptr, /*safe*/ true, exception_state);
} else {
if (options->sanitizer()->IsSanitizer()) {
// We already got a sanitizer.
sanitizer = options->sanitizer()->GetAsSanitizer();
} else if (options->sanitizer()->IsSanitizerConfig()) {
// We need to create a Sanitizer from a given config.
sanitizer =
Sanitizer::Create(options->sanitizer()->GetAsSanitizerConfig(),
/*safe*/ true, exception_state);
} else if (options->sanitizer()->IsSanitizerPresets()) {
// Create a Sanitizer from a "preset" string.
sanitizer = Sanitizer::Create(
options->sanitizer()->GetAsSanitizerPresets().AsEnum(),
exception_state);
} else {
// Default case: Dictionary with 'sanitizer' member but no (valid) value.
sanitizer = Sanitizer::Create(nullptr, /*safe*/ true, exception_state);
}
}
if (exception_state.HadException()) {
return;
}
CHECK(sanitizer);
sanitizer->SanitizeSafe(element);
}
void SanitizerAPI::SanitizeUnsafeInternal(ContainerNode* element,
SetHTMLUnsafeOptions* options,
ExceptionState& exception_state) {
if (exception_state.HadException()) {
element->setTextContent("");
return;
}
const Sanitizer* sanitizer = nullptr;
if (!options || !options->hasSanitizer()) {
// Default case: No dictionary, or dictionary without 'sanitizer' member.
sanitizer = Sanitizer::Create(nullptr, /*safe*/ false, exception_state);
} else {
if (options->sanitizer()->IsSanitizer()) {
// We already got a sanitizer.
sanitizer = options->sanitizer()->GetAsSanitizer();
} else if (options->sanitizer()->IsSanitizerConfig()) {
// We need to create a Sanitizer from a given config.
sanitizer =
Sanitizer::Create(options->sanitizer()->GetAsSanitizerConfig(),
/*safe*/ false, exception_state);
} else if (options->sanitizer()->IsSanitizerPresets()) {
// Create a Sanitizer from a "preset" string.
sanitizer = Sanitizer::Create(
options->sanitizer()->GetAsSanitizerPresets().AsEnum(),
exception_state);
} else {
// Default case: Dictionary with 'sanitizer' member but not (valid) value.
sanitizer = Sanitizer::Create(nullptr, /*safe*/ false, exception_state);
}
}
if (exception_state.HadException()) {
return;
}
CHECK(sanitizer);
sanitizer->SanitizeUnsafe(element);
}
} // namespace blink
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