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/bio.h> 9#include <openssl/bn.h> 10#include <openssl/dsa.h> 11#include <openssl/ec.h> 12#include <openssl/ecdsa.h> 13#include <openssl/evp.h> 14#include <openssl/rsa.h> 15 16#include "base/memory/scoped_ptr.h" 17 18namespace crypto { 19 20// Simplistic helper that wraps a call to a deleter function. In a C++11 world, 21// this would be std::function<>. An alternative would be to re-use 22// base::internal::RunnableAdapter<>, but that's far too heavy weight. 23template <typename Type, void (*Destroyer)(Type*)> 24struct OpenSSLDestroyer { 25 void operator()(Type* ptr) const { Destroyer(ptr); } 26}; 27 28template <typename PointerType, void (*Destroyer)(PointerType*)> 29struct ScopedOpenSSL { 30 typedef scoped_ptr<PointerType, OpenSSLDestroyer<PointerType, Destroyer> > 31 Type; 32}; 33 34struct OpenSSLFree { 35 void operator()(uint8_t* ptr) const { OPENSSL_free(ptr); } 36}; 37 38// Several typedefs are provided for crypto-specific primitives, for 39// short-hand and prevalence. Note that OpenSSL types related to X.509 are 40// intentionally not included, as crypto/ does not generally deal with 41// certificates or PKI. 42typedef ScopedOpenSSL<BIGNUM, BN_free>::Type ScopedBIGNUM; 43typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY; 44typedef ScopedOpenSSL<BIO, BIO_free_all>::Type ScopedBIO; 45typedef ScopedOpenSSL<DSA, DSA_free>::Type ScopedDSA; 46typedef ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free>::Type ScopedECDSA_SIG; 47typedef ScopedOpenSSL<EC_KEY, EC_KEY_free>::Type ScopedEC_KEY; 48typedef ScopedOpenSSL<EVP_MD_CTX, EVP_MD_CTX_destroy>::Type ScopedEVP_MD_CTX; 49typedef ScopedOpenSSL<EVP_PKEY, EVP_PKEY_free>::Type ScopedEVP_PKEY; 50typedef ScopedOpenSSL<EVP_PKEY_CTX, EVP_PKEY_CTX_free>::Type ScopedEVP_PKEY_CTX; 51typedef ScopedOpenSSL<RSA, RSA_free>::Type ScopedRSA; 52 53// The bytes must have been allocated with OPENSSL_malloc. 54typedef scoped_ptr<uint8_t, OpenSSLFree> ScopedOpenSSLBytes; 55 56} // namespace crypto 57 58#endif // CRYPTO_SCOPED_OPENSSL_TYPES_H_ 59