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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/autofill/content/renderer/password_form_conversion_utils.h"
#include <optional>
#include "base/lazy_instance.h"
#include "base/no_destructor.h"
#include "base/strings/string_split.h"
#include "components/autofill/content/renderer/html_based_username_detector.h"
#include "components/autofill/content/renderer/synchronous_form_cache.h"
#include "components/autofill/content/renderer/timing.h"
#include "components/autofill/core/common/autofill_features.h"
#include "components/autofill/core/common/unique_ids.h"
#include "google_apis/gaia/gaia_auth_util.h"
#include "net/base/url_util.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_form_control_element.h"
#include "third_party/blink/public/web/web_input_element.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/re2/src/re2/re2.h"
#include "url/gurl.h"
using blink::WebElement;
using blink::WebFormControlElement;
using blink::WebFormElement;
using blink::WebInputElement;
using blink::WebLocalFrame;
using blink::WebString;
namespace autofill {
using form_util::ExtractOption;
namespace {
const char kPasswordSiteUrlRegex[] =
"passwords(?:-[a-z-]+\\.corp)?\\.google\\.com";
struct PasswordSiteUrlLazyInstanceTraits
: public base::internal::DestructorAtExitLazyInstanceTraits<re2::RE2> {
static re2::RE2* New(void* instance) {
return CreateMatcher(instance, kPasswordSiteUrlRegex);
}
};
base::LazyInstance<re2::RE2, PasswordSiteUrlLazyInstanceTraits>
g_password_site_matcher = LAZY_INSTANCE_INITIALIZER;
// Extracts the username predictions. |control_elements| should be all the DOM
// elements of the form, |form_data| should be the already extracted FormData
// representation of that form. |username_detector_cache| is optional, and can
// be used to spare recomputation if called multiple times for the same form.
std::vector<FieldRendererId> GetUsernamePredictions(
const FormData& form_data,
UsernameDetectorCache* username_detector_cache) {
// Dummy cache stores the predictions in case no real cache was passed to
// here.
UsernameDetectorCache dummy_cache;
if (!username_detector_cache)
username_detector_cache = &dummy_cache;
return GetPredictionsFieldBasedOnHtmlAttributes(form_data,
username_detector_cache);
}
} // namespace
re2::RE2* CreateMatcher(void* instance, const char* pattern) {
re2::RE2::Options options;
options.set_case_sensitive(false);
// Use placement new to initialize the instance in the preallocated space.
// The "(instance)" is very important to force POD type initialization.
re2::RE2* matcher = new (instance) re2::RE2(pattern, options);
DCHECK(matcher->ok());
return matcher;
}
bool IsGaiaReauthenticationForm(const blink::WebFormElement& form) {
if (!gaia::HasGaiaSchemeHostPort(form.GetDocument().Url()))
return false;
bool has_rart_field = false;
bool has_continue_field = false;
for (const WebFormControlElement& element : form.GetFormControlElements()) {
// We're only interested in the presence
// of <input type="hidden" /> elements.
const WebInputElement input = element.DynamicTo<WebInputElement>();
if (!input || input.FormControlTypeForAutofill() !=
blink::mojom::FormControlType::kInputHidden) {
continue;
}
// There must be a hidden input named "rart".
if (input.FormControlName() == "rart")
has_rart_field = true;
// There must be a hidden input named "continue", whose value points
// to a password (or password testing) site.
if (input.FormControlName() == "continue" &&
re2::RE2::PartialMatch(input.Value().Utf8(),
g_password_site_matcher.Get())) {
has_continue_field = true;
}
}
return has_rart_field && has_continue_field;
}
bool IsGaiaWithSkipSavePasswordForm(const blink::WebFormElement& form) {
if (!gaia::HasGaiaSchemeHostPort(form.GetDocument().Url()))
return false;
GURL url(form.GetDocument().Url());
std::string should_skip_password;
if (!net::GetValueForKeyInQuery(url, "ssp", &should_skip_password))
return false;
return should_skip_password == "1";
}
void ProcessFormDataAfterCreation(
FormData& form_data,
blink::WebFormElement web_form,
UsernameDetectorCache* username_detector_cache) {
if (web_form) {
form_data.set_is_gaia_with_skip_save_password_form(
IsGaiaWithSkipSavePasswordForm(web_form) ||
IsGaiaReauthenticationForm(web_form));
}
form_data.set_username_predictions(
GetUsernamePredictions(form_data, username_detector_cache));
}
std::optional<FormData> CreateFormDataFromWebForm(
const WebFormElement& web_form,
const FieldDataManager& field_data_manager,
UsernameDetectorCache* username_detector_cache,
form_util::ButtonTitlesCache* button_titles_cache,
const CallTimerState& timer_state,
const SynchronousFormCache& form_cache) {
if (!web_form) {
return std::nullopt;
}
std::optional<FormData> form_data = form_cache.GetOrExtractForm(
web_form.GetDocument(), web_form, field_data_manager, timer_state,
button_titles_cache);
if (!form_data) {
return std::nullopt;
}
ProcessFormDataAfterCreation(*form_data, web_form, username_detector_cache);
return form_data;
}
std::optional<FormData> CreateFormDataFromUnownedInputElements(
const WebLocalFrame& frame,
const FieldDataManager& field_data_manager,
UsernameDetectorCache* username_detector_cache,
const CallTimerState& timer_state,
form_util::ButtonTitlesCache* button_titles_cache,
const SynchronousFormCache& form_cache) {
std::optional<FormData> form_data = form_cache.GetOrExtractForm(
frame.GetDocument(), WebFormElement(), field_data_manager, timer_state,
button_titles_cache);
if (!form_data) {
return std::nullopt;
}
ProcessFormDataAfterCreation(*form_data, WebFormElement(),
username_detector_cache);
return form_data;
}
std::string GetSignOnRealm(const GURL& origin) {
GURL::Replacements rep;
rep.SetPathStr("");
return origin.ReplaceComponents(rep).spec();
}
} // namespace autofill
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