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| 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 #ifndef CRYPTO_CAPI_UTIL_H_ |
| 6 #define CRYPTO_CAPI_UTIL_H_ |
| 7 #pragma once |
| 8 |
| 9 #include <windows.h> |
| 10 #include <wincrypt.h> |
| 11 |
| 12 namespace crypto { |
| 13 |
| 14 // CryptAcquireContext when passed CRYPT_NEWKEYSET or CRYPT_DELETEKEYSET in |
| 15 // flags is not thread-safe. For such calls, we create a global lock to |
| 16 // synchronize it. |
| 17 // |
| 18 // From "Threading Issues with Cryptographic Service Providers", |
| 19 // <http://msdn.microsoft.com/en-us/library/aa388149(v=VS.85).aspx>: |
| 20 // |
| 21 // "The CryptAcquireContext function is generally thread safe unless |
| 22 // CRYPT_NEWKEYSET or CRYPT_DELETEKEYSET is specified in the dwFlags |
| 23 // parameter." |
| 24 BOOL CryptAcquireContextLocked(HCRYPTPROV* prov, |
| 25 LPCWSTR container, |
| 26 LPCWSTR provider, |
| 27 DWORD prov_type, |
| 28 DWORD flags); |
| 29 |
| 30 } // namespace crypto |
| 31 |
| 32 #endif // CRYPTO_CAPI_UTIL_H_ |
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