crypto/scoped_openssl_types.h

   1 // Copyright 2014 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_SCOPED_OPENSSL_TYPES_H_
   6 #define CRYPTO_SCOPED_OPENSSL_TYPES_H_
   7
   8 #include <openssl/bn.h>
   9 #include <openssl/dsa.h>
  10 #include <openssl/ec.h>
  11 #include <openssl/ecdsa.h>
  12 #include <openssl/evp.h>
  13 #include <openssl/rsa.h>
  14
  15 #include "base/memory/scoped_ptr.h"
  16
  17 namespace crypto {
  18
  19 // Simplistic helper that wraps a call to a deleter function. In a C++11 world,
  20 // this would be std::function<>. An alternative would be to re-use
  21 // base::internal::RunnableAdapter<>, but that's far too heavy weight.
  22 template <typename Type, void (*Destroyer)(Type*)>
  23 struct OpenSSLDestroyer {
  24   void operator()(Type* ptr) const { Destroyer(ptr); }
  25 };
  26
  27 template <typename PointerType, void (*Destroyer)(PointerType*)>
  28 struct ScopedOpenSSL {
  29   typedef scoped_ptr<PointerType, OpenSSLDestroyer<PointerType, Destroyer> >
  30       Type;
  31 };
  32
  33 // Several typedefs are provided for crypto-specific primitives, for
  34 // short-hand and prevalence. Note that OpenSSL types related to X.509 are
  35 // intentionally not included, as crypto/ does not generally deal with
  36 // certificates or PKI.
  37 typedef ScopedOpenSSL<BIGNUM, BN_free>::Type ScopedBIGNUM;
  38 typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY;
  39 typedef ScopedOpenSSL<BIO, BIO_free_all>::Type ScopedBIO;
  40 typedef ScopedOpenSSL<DSA, DSA_free>::Type ScopedDSA;
  41 typedef ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free>::Type ScopedECDSA_SIG;
  42 typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY;
  43 typedef ScopedOpenSSL<EVP_MD_CTX, EVP_MD_CTX_destroy>::Type ScopedEVP_MD_CTX;
  44 typedef ScopedOpenSSL<EVP_PKEY, EVP_PKEY_free>::Type ScopedEVP_PKEY;
  45 typedef ScopedOpenSSL<RSA, RSA_free>::Type ScopedRSA;
  46
  47 }  // namespace crypto
  48
  49 #endif  // CRYPTO_SCOPED_OPENSSL_TYPES_H_