Refactor client cert private key handling.

chrome/browser/ui/views/ssl_client_certificate_selector.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // 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 <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.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 "ui/base/l10n/l10n_util.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/widget/widget.h"
 
-#if defined(USE_NSS_CERTS) && !defined(OS_CHROMEOS)
-#include "chrome/browser/ui/crypto_module_password_dialog_nss.h"
-#endif
+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::Bind(&SSLClientAuthObserverImpl::GotPrivateKey,
+                   base::Passed(&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::CertificateList client_certs,
+    net::ClientCertIdentityList client_certs,
     std::unique_ptr<content::ClientCertificateDelegate> delegate)
     : CertificateSelector(std::move(client_certs), web_contents),
-      SSLClientAuthObserver(web_contents->GetBrowserContext(),
-                            cert_request_info,
-                            std::move(delegate)),
-      WebContentsObserver(web_contents) {
+      auth_observer_impl_(
+          base::MakeUnique<SSLClientAuthObserverImpl>(web_contents,
+                                                      cert_request_info,
+                                                      std::move(delegate))) {
   chrome::RecordDialogCreation(
       chrome::DialogIdentifier::SSL_CLIENT_CERTIFICATE_SELECTOR);
 }
 
 SSLClientCertificateSelector::~SSLClientCertificateSelector() {}
 
 void SSLClientCertificateSelector::Init() {
-  StartObserving();
+  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(cert_request_info()->host_and_port.ToString()))));
+          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::OnCertSelectedByNotification() {
+void SSLClientCertificateSelector::CloseDialog() {
   GetWidget()->Close();
 }
 
 void SSLClientCertificateSelector::DeleteDelegate() {
   // 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.)
-  CertificateSelected(nullptr);
+  if (auth_observer_impl_)
+    auth_observer_impl_->CertificateSelected(nullptr, nullptr);
   chrome::CertificateSelector::DeleteDelegate();
 }
 
-bool SSLClientCertificateSelector::Accept() {
-  scoped_refptr<net::X509Certificate> cert = GetSelectedCert();
-  if (cert.get()) {
-    // Remove the observer before we try unlocking, otherwise we might act on a
-    // notification while waiting for the unlock dialog, causing us to delete
-    // ourself before the Unlocked callback gets called.
-    StopObserving();
-#if defined(USE_NSS_CERTS) && !defined(OS_CHROMEOS)
-    chrome::UnlockCertSlotIfNecessary(
-        cert.get(), chrome::kCryptoModulePasswordClientAuth,
-        cert_request_info()->host_and_port, GetWidget()->GetNativeView(),
-        base::Bind(&SSLClientCertificateSelector::Unlocked,
-                   base::Unretained(this), base::RetainedRef(cert)));
-#else
-    Unlocked(cert.get());
-#endif
-    return false;  // Unlocked() will close the dialog.
-  }
-
-  return false;
-}
-
-void SSLClientCertificateSelector::WebContentsDestroyed() {
-  // If the dialog is closed by closing the containing tab, abort the request.
-  CancelCertificateSelection();
-}
-
-void SSLClientCertificateSelector::Unlocked(net::X509Certificate* cert) {
-  CertificateSelected(cert);
-  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));
 }
 
 namespace chrome {
 
 void ShowSSLClientCertificateSelector(
     content::WebContents* contents,
     net::SSLCertRequestInfo* cert_request_info,
-    net::CertificateList client_certs,
+    net::ClientCertIdentityList client_certs,
     std::unique_ptr<content::ClientCertificateDelegate> delegate) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // 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;
 
   SSLClientCertificateSelector* selector = new SSLClientCertificateSelector(
       contents, cert_request_info, std::move(client_certs),
       std::move(delegate));
   selector->Init();
   selector->Show();
 }
 
 }  // namespace chrome