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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/ssl_client_certificate_selector.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/no_destructor.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "chrome/browser/ssl/ssl_client_auth_observer.h"
#include "chrome/browser/ui/browser_dialogs.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/client_certificate_delegate.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "net/cert/x509_certificate.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/ssl/ssl_private_key.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/views/controls/label.h"
#include "ui/views/widget/widget.h"
namespace {
// Returns the storage of a test hook for `ShowSSLClientCertificateSelector()`.
ShowSSLClientCertificateSelectorTestingHook&
GetShowSSLClientCertificateSelectorTestingHook() {
static base::NoDestructor<ShowSSLClientCertificateSelectorTestingHook>
instance;
return *instance;
}
} // namespace
class SSLClientCertificateSelector::SSLClientAuthObserverImpl
: public SSLClientAuthObserver,
public content::WebContentsObserver {
public:
SSLClientAuthObserverImpl(
content::WebContents* web_contents,
const scoped_refptr<net::SSLCertRequestInfo>& cert_request_info,
std::unique_ptr<content::ClientCertificateDelegate> delegate)
: SSLClientAuthObserver(web_contents->GetBrowserContext(),
cert_request_info,
std::move(delegate)),
content::WebContentsObserver(web_contents) {}
void Init(base::OnceClosure close_dialog_callback) {
close_dialog_callback_ = std::move(close_dialog_callback);
StartObserving();
}
static void AcceptCertificate(
std::unique_ptr<SSLClientAuthObserverImpl> self,
std::unique_ptr<net::ClientCertIdentity> identity) {
// Remove the observer before we try acquiring private key, otherwise we
// might act on a notification while waiting for the callback, causing us
// to delete ourself before the callback gets called, or to try to run
// |close_dialog_callback_| on a dialog which is already closed.
self->StopObserving();
net::X509Certificate* cert = identity->certificate();
net::ClientCertIdentity::SelfOwningAcquirePrivateKey(
std::move(identity),
base::BindOnce(&SSLClientAuthObserverImpl::GotPrivateKey,
std::move(self), base::Unretained(cert)));
}
void GotPrivateKey(net::X509Certificate* cert,
scoped_refptr<net::SSLPrivateKey> private_key) {
CertificateSelected(cert, private_key.get());
}
// SSLClientAuthObserver:
void OnCertSelectedByNotification() override {
std::move(close_dialog_callback_).Run();
}
// content::WebContentsObserver:
void WebContentsDestroyed() override {
// If the tab is closed (either while the selector dialog is still showing,
// or after the dialog has closed but the AcquirePrivateKey callback is
// still pending), abort the request.
CancelCertificateSelection();
}
private:
base::OnceClosure close_dialog_callback_;
};
SSLClientCertificateSelector::SSLClientCertificateSelector(
content::WebContents* web_contents,
const scoped_refptr<net::SSLCertRequestInfo>& cert_request_info,
net::ClientCertIdentityList client_certs,
std::unique_ptr<content::ClientCertificateDelegate> delegate)
: CertificateSelector(std::move(client_certs), web_contents),
auth_observer_impl_(
std::make_unique<SSLClientAuthObserverImpl>(web_contents,
cert_request_info,
std::move(delegate))) {
RegisterDeleteDelegateCallback(
RegisterDeleteCallbackPassKey(),
base::BindOnce(
[](SSLClientCertificateSelector* dialog) {
// This is here and not in Cancel() to give WebContentsDestroyed a
// chance to abort instead of proceeding with a null certificate.
// (This will be ignored if there was a previous call to
// CertificateSelected or CancelCertificateSelection.)
if (dialog->auth_observer_impl_) {
dialog->auth_observer_impl_->CertificateSelected(nullptr,
nullptr);
}
},
this));
}
SSLClientCertificateSelector::~SSLClientCertificateSelector() = default;
void SSLClientCertificateSelector::Init() {
auth_observer_impl_->Init(base::BindOnce(
&SSLClientCertificateSelector::CloseDialog, base::Unretained(this)));
std::unique_ptr<views::Label> text_label(
new views::Label(l10n_util::GetStringFUTF16(
IDS_CLIENT_CERT_DIALOG_TEXT,
base::ASCIIToUTF16(auth_observer_impl_->cert_request_info()
->host_and_port.ToString()))));
text_label->SetMultiLine(true);
text_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
text_label->SetAllowCharacterBreak(true);
text_label->SizeToFit(kTableViewWidth);
InitWithText(std::move(text_label));
}
void SSLClientCertificateSelector::CloseDialog() {
GetWidget()->Close();
}
void SSLClientCertificateSelector::AcceptCertificate(
std::unique_ptr<net::ClientCertIdentity> identity) {
// The SSLClientCertificateSelector will be destroyed after this method
// returns, so the SSLClientAuthObserverImpl manages its own lifetime while
// acquiring the private key from |identity|.
SSLClientAuthObserverImpl::AcceptCertificate(std::move(auth_observer_impl_),
std::move(identity));
}
void SSLClientCertificateSelector::OnCancel() {
// Close the dialog if it is not currently being displayed
if (!GetWidget()->IsVisible()) {
CloseDialog();
}
}
base::OnceClosure SSLClientCertificateSelector::GetCancellationCallback() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return base::BindOnce(&SSLClientCertificateSelector::OnCancel,
weak_factory_.GetWeakPtr());
}
base::OnceClosure ShowSSLClientCertificateSelector(
content::WebContents* contents,
net::SSLCertRequestInfo* cert_request_info,
net::ClientCertIdentityList client_certs,
std::unique_ptr<content::ClientCertificateDelegate> delegate) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!GetShowSSLClientCertificateSelectorTestingHook().is_null()) {
return GetShowSSLClientCertificateSelectorTestingHook().Run(
contents, cert_request_info, std::move(client_certs),
std::move(delegate));
}
// Don't bother prompting the user if there are no certs to choose from.
// Just continue with no certificate.
if (client_certs.empty()) {
delegate->ContinueWithCertificate(nullptr, nullptr);
return base::OnceClosure();
}
// Not all WebContentses can show modal dialogs.
//
// TODO(davidben): Move this hook to the WebContentsDelegate and only try to
// show a dialog in Browser's implementation. https://crbug.com/456255
if (!SSLClientCertificateSelector::CanShow(contents)) {
return base::OnceClosure();
}
SSLClientCertificateSelector* selector = new SSLClientCertificateSelector(
contents, cert_request_info, std::move(client_certs),
std::move(delegate));
selector->Init();
selector->Show();
return selector->GetCancellationCallback();
}
void SetShowSSLClientCertificateSelectorHookForTest(
ShowSSLClientCertificateSelectorTestingHook hook) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
GetShowSSLClientCertificateSelectorTestingHook() = std::move(hook);
}
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