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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/ui/crypto_module_delegate_nss.h"
      6 
      7 #include "base/basictypes.h"
      8 #include "base/bind.h"
      9 #include "chrome/browser/net/nss_context.h"
     10 #include "content/public/browser/browser_thread.h"
     11 
     12 using content::BrowserThread;
     13 
     14 ChromeNSSCryptoModuleDelegate::ChromeNSSCryptoModuleDelegate(
     15     chrome::CryptoModulePasswordReason reason,
     16     const std::string& server)
     17     : reason_(reason),
     18       server_(server),
     19       event_(false, false),
     20       cancelled_(false) {}
     21 
     22 ChromeNSSCryptoModuleDelegate::~ChromeNSSCryptoModuleDelegate() {}
     23 
     24 bool ChromeNSSCryptoModuleDelegate::InitializeSlot(
     25     content::ResourceContext* context,
     26     const base::Closure& initialization_complete_callback) {
     27   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
     28   base::Callback<void(crypto::ScopedPK11Slot)> get_slot_callback;
     29   if (!initialization_complete_callback.is_null())
     30     get_slot_callback = base::Bind(&ChromeNSSCryptoModuleDelegate::DidGetSlot,
     31                                    // Caller is responsible for keeping |this|
     32                                    // alive until the callback is run.
     33                                    base::Unretained(this),
     34                                    initialization_complete_callback);
     35 
     36   slot_ = GetPrivateNSSKeySlotForResourceContext(context, get_slot_callback);
     37   return slot_.get() != NULL;
     38 }
     39 
     40 // TODO(mattm): allow choosing which slot to generate and store the key.
     41 crypto::ScopedPK11Slot ChromeNSSCryptoModuleDelegate::RequestSlot() {
     42   return slot_.Pass();
     43 }
     44 
     45 std::string ChromeNSSCryptoModuleDelegate::RequestPassword(
     46     const std::string& slot_name,
     47     bool retry,
     48     bool* cancelled) {
     49   DCHECK(!event_.IsSignaled());
     50   event_.Reset();
     51 
     52   if (BrowserThread::PostTask(
     53           BrowserThread::UI,
     54           FROM_HERE,
     55           base::Bind(&ChromeNSSCryptoModuleDelegate::ShowDialog,
     56                      // This method blocks on |event_| until the task completes,
     57                      // so there's no need to ref-count.
     58                      base::Unretained(this),
     59                      slot_name,
     60                      retry))) {
     61     event_.Wait();
     62   }
     63   *cancelled = cancelled_;
     64   return password_;
     65 }
     66 
     67 void ChromeNSSCryptoModuleDelegate::ShowDialog(const std::string& slot_name,
     68                                                bool retry) {
     69   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     70   ShowCryptoModulePasswordDialog(
     71       slot_name,
     72       retry,
     73       reason_,
     74       server_,
     75       NULL,  // TODO(mattm): Supply parent window.
     76       base::Bind(&ChromeNSSCryptoModuleDelegate::GotPassword,
     77                  // RequestPassword is blocked on |event_| until GotPassword is
     78                  // called, so there's no need to ref-count.
     79                  base::Unretained(this)));
     80 }
     81 
     82 void ChromeNSSCryptoModuleDelegate::GotPassword(const std::string& password) {
     83   if (!password.empty())
     84     password_ = password;
     85   else
     86     cancelled_ = true;
     87   event_.Signal();
     88 }
     89 
     90 void ChromeNSSCryptoModuleDelegate::DidGetSlot(const base::Closure& callback,
     91                                                crypto::ScopedPK11Slot slot) {
     92   slot_ = slot.Pass();
     93   callback.Run();
     94 }
     95 
     96 crypto::CryptoModuleBlockingPasswordDelegate*
     97 CreateCryptoModuleBlockingPasswordDelegate(
     98     chrome::CryptoModulePasswordReason reason,
     99     const std::string& server) {
    100   // Returns a ChromeNSSCryptoModuleDelegate without calling InitializeSlot.
    101   // Since it is only being used as a CreateCryptoModuleBlockingDialogDelegate,
    102   // initializing the slot handle is unnecessary.
    103   return new ChromeNSSCryptoModuleDelegate(reason, server);
    104 }
    105