Reland "Cut down /crypto and switch what is left of it to boringssl".

crypto/scoped_capi_types.h

-// 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.
-
-#ifndef CRYPTO_SCOPED_CAPI_TYPES_H_
-#define CRYPTO_SCOPED_CAPI_TYPES_H_
-
-#include <windows.h>
-
-#include <algorithm>
-
-#include "base/logging.h"
-#include "crypto/wincrypt_shim.h"
-
-namespace crypto {
-
-// Simple destructor for the Free family of CryptoAPI functions, such as
-// CryptDestroyHash, which take only a single argument to release.
-template <typename CAPIHandle, BOOL (WINAPI *Destroyer)(CAPIHandle)>
-struct CAPIDestroyer {
-  void operator()(CAPIHandle handle) const {
-    if (handle) {
-      BOOL ok = Destroyer(handle);
-      DCHECK(ok);
-    }
-  }
-};
-
-// Destructor for the Close/Release family of CryptoAPI functions, which take
-// a second DWORD parameter indicating flags to use when closing or releasing.
-// This includes functions like CertCloseStore or CryptReleaseContext.
-template <typename CAPIHandle, BOOL (WINAPI *Destroyer)(CAPIHandle, DWORD),
-          DWORD flags>
-struct CAPIDestroyerWithFlags {
-  void operator()(CAPIHandle handle) const {
-    if (handle) {
-      BOOL ok = Destroyer(handle, flags);
-      DCHECK(ok);
-    }
-  }
-};
-
-// scoped_ptr-like class for the CryptoAPI cryptography and certificate
-// handles. Because these handles are defined as integer types, and not
-// pointers, the existing scoped classes, such as scoped_ptr, are insufficient.
-// The semantics are the same as scoped_ptr.
-template <class CAPIHandle, typename FreeProc>
-class ScopedCAPIHandle {
- public:
-  explicit ScopedCAPIHandle(CAPIHandle handle = NULL) : handle_(handle) {}
-
-  ~ScopedCAPIHandle() {
-    reset();
-  }
-
-  void reset(CAPIHandle handle = NULL) {
-    if (handle_ != handle) {
-      FreeProc free_proc;
-      free_proc(handle_);
-      handle_ = handle;
-    }
-  }
-
-  operator CAPIHandle() const { return handle_; }
-  CAPIHandle get() const { return handle_; }
-
-  CAPIHandle* receive() {
-    CHECK(handle_ == NULL);
-    return &handle_;
-  }
-
-  bool operator==(CAPIHandle handle) const {
-    return handle_ == handle;
-  }
-
-  bool operator!=(CAPIHandle handle) const {
-    return handle_ != handle;
-  }
-
-  void swap(ScopedCAPIHandle& b) {
-    CAPIHandle tmp = b.handle_;
-    b.handle_ = handle_;
-    handle_ = tmp;
-  }
-
-  CAPIHandle release() {
-    CAPIHandle tmp = handle_;
-    handle_ = NULL;
-    return tmp;
-  }
-
- private:
-  CAPIHandle handle_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedCAPIHandle);
-};
-
-template<class CH, typename FP> inline
-bool operator==(CH h, const ScopedCAPIHandle<CH, FP>& b) {
-  return h == b.get();
-}
-
-template<class CH, typename FP> inline
-bool operator!=(CH h, const ScopedCAPIHandle<CH, FP>& b) {
-  return h != b.get();
-}
-
-typedef ScopedCAPIHandle<
-    HCRYPTPROV,
-    CAPIDestroyerWithFlags<HCRYPTPROV,
-                           CryptReleaseContext, 0> > ScopedHCRYPTPROV;
-
-typedef ScopedCAPIHandle<
-    HCRYPTKEY, CAPIDestroyer<HCRYPTKEY, CryptDestroyKey> > ScopedHCRYPTKEY;
-
-typedef ScopedCAPIHandle<
-    HCRYPTHASH, CAPIDestroyer<HCRYPTHASH, CryptDestroyHash> > ScopedHCRYPTHASH;
-
-}  // namespace crypto
-
-#endif  // CRYPTO_SCOPED_CAPI_TYPES_H_