base/crypto/capi_util.cc

   1 // Copyright (c) 2010 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 "base/crypto/capi_util.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/lock.h"
   9 #include "base/singleton.h"
  10
  11 namespace {
  12
  13 class CAPIUtilSingleton {
  14  public:
  15   static CAPIUtilSingleton* GetInstance() {
  16     return Singleton<CAPIUtilSingleton>::get();
  17   }
  18
  19   // Returns a lock to guard calls to CryptAcquireContext with
  20   // CRYPT_DELETEKEYSET or CRYPT_NEWKEYSET.
  21   Lock& acquire_context_lock() {
  22     return acquire_context_lock_;
  23   }
  24
  25  private:
  26   friend class Singleton<CAPIUtilSingleton>;
  27   friend struct DefaultSingletonTraits<CAPIUtilSingleton>;
  28
  29   CAPIUtilSingleton() {}
  30
  31   Lock acquire_context_lock_;
  32
  33   DISALLOW_COPY_AND_ASSIGN(CAPIUtilSingleton);
  34 };
  35
  36 }  // namespace
  37
  38 namespace base {
  39
  40 BOOL CryptAcquireContextLocked(HCRYPTPROV* prov,
  41                                const TCHAR* container,
  42                                const TCHAR* provider,
  43                                DWORD prov_type,
  44                                DWORD flags)
  45 {
  46   AutoLock lock(CAPIUtilSingleton::GetInstance()->acquire_context_lock());
  47   return CryptAcquireContext(prov, container, provider, prov_type, flags);
  48 }
  49
  50 }  // namespace base