crypto/capi_util.cc

   1 // Copyright (c) 2011 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 "crypto/capi_util.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/memory/singleton.h"
   9 #include "base/synchronization/lock.h"
  10
  11 namespace {
  12
  13 class CAPIUtilSingleton {
  14  public:
  15   static CAPIUtilSingleton* GetInstance() {
  16     return base::Singleton<CAPIUtilSingleton>::get();
  17   }
  18
  19   // Returns a lock to guard calls to CryptAcquireContext with
  20   // CRYPT_DELETEKEYSET or CRYPT_NEWKEYSET.
  21   base::Lock& acquire_context_lock() {
  22     return acquire_context_lock_;
  23   }
  24
  25  private:
  26   friend class base::Singleton<CAPIUtilSingleton>;
  27   friend struct base::DefaultSingletonTraits<CAPIUtilSingleton>;
  28
  29   CAPIUtilSingleton() {}
  30
  31   base::Lock acquire_context_lock_;
  32
  33   DISALLOW_COPY_AND_ASSIGN(CAPIUtilSingleton);
  34 };
  35
  36 }  // namespace
  37
  38 namespace crypto {
  39
  40 BOOL CryptAcquireContextLocked(HCRYPTPROV* prov,
  41                                LPCWSTR container,
  42                                LPCWSTR provider,
  43                                DWORD prov_type,
  44                                DWORD flags) {
  45   base::AutoLock lock(CAPIUtilSingleton::GetInstance()->acquire_context_lock());
  46   return CryptAcquireContext(prov, container, provider, prov_type, flags);
  47 }
  48
  49 void* WINAPI CryptAlloc(size_t size) {
  50   return malloc(size);
  51 }
  52
  53 void WINAPI CryptFree(void* p) {
  54   free(p);
  55 }
  56
  57 }  // namespace crypto