Eliminate ScopedOpenSSL in favour of scoped_ptr<> specializations.

crypto/scoped_openssl_types.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[eroman, 2014/07/10 01:38:59]

2014

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CRYPTO_SCOPED_OPENSSL_TYPES_H_
+#define CRYPTO_SCOPED_OPENSSL_TYPES_H_
+
+#include <openssl/bn.h>
+#include <openssl/dsa.h>
+#include <openssl/ec.h>
+#include <openssl/ecdsa.h>
+#include <openssl/evp.h>
+#include <openssl/rsa.h>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace crypto {
+
+// Simplistic helper that wraps a call to a deleter function. In a C++11 world,
+// this would be std::function<>. An alternative would be to re-use
+// base::internal::RunnableAdapter<>, but that's far too heavy weight.
+template <typename Type, void (*Destroyer)(Type*)>
+struct OpenSSLDestroyer {
+  void operator()(Type* ptr) const { Destroyer(ptr); }
+};
+
+template <typename PointerType, void (*Destroyer)(PointerType*)>
+struct ScopedOpenSSL {
+  typedef scoped_ptr<PointerType, OpenSSLDestroyer<PointerType, Destroyer> >
+      Type;
+};
+
+// Several typedefs are provided for crypto-specific primitives, for
+// short-hand and prevalence. Note that OpenSSL types related to X.509 are
+// intentionally not included, as crypto/ does not generally deal with
+// certificates or PKI.
+typedef ScopedOpenSSL<BIGNUM, BN_free>::Type ScopedBIGNUM;
+typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY;
+typedef ScopedOpenSSL<BIO, BIO_free_all>::Type ScopedBIO;
+typedef ScopedOpenSSL<DSA, DSA_free>::Type ScopedDSA;
+typedef ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free>::Type ScopedECDSA_SIG;
+typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY;
+typedef ScopedOpenSSL<EVP_MD_CTX, EVP_MD_CTX_destroy>::Type ScopedEVP_MD_CTX;
+typedef ScopedOpenSSL<EVP_PKEY, EVP_PKEY_free>::Type ScopedEVP_PKEY;
+typedef ScopedOpenSSL<RSA, RSA_free>::Type ScopedRSA;
+
+}  // namespace crypto
+
+#endif  // CRYPTO_SCOPED_OPENSSL_TYPES_H_