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 #ifdef OPENSSL_IS_BORINGSSL 15 #include <openssl/mem.h> 16 #endif 17 #include <openssl/rsa.h> 18 #include <stdint.h> 19 20 #include <memory> 21 22 namespace crypto { 23 24 // Simplistic helper that wraps a call to a deleter function. In a C++11 world, 25 // this would be std::function<>. An alternative would be to re-use 26 // base::internal::RunnableAdapter<>, but that's far too heavy weight. 27 template <typename Type, void (*Destroyer)(Type*)> 28 struct OpenSSLDestroyer { operatorOpenSSLDestroyer29 void operator()(Type* ptr) const { Destroyer(ptr); } 30 }; 31 32 template <typename PointerType, void (*Destroyer)(PointerType*)> 33 using ScopedOpenSSL = 34 std::unique_ptr<PointerType, OpenSSLDestroyer<PointerType, Destroyer>>; 35 36 struct OpenSSLFree { operatorOpenSSLFree37 void operator()(uint8_t* ptr) const { OPENSSL_free(ptr); } 38 }; 39 40 // Several typedefs are provided for crypto-specific primitives, for 41 // short-hand and prevalence. Note that OpenSSL types related to X.509 are 42 // intentionally not included, as crypto/ does not generally deal with 43 // certificates or PKI. 44 using ScopedBIGNUM = ScopedOpenSSL<BIGNUM, BN_free>; 45 using ScopedEC_Key = ScopedOpenSSL<EC_KEY, EC_KEY_free>; 46 using ScopedBIO = ScopedOpenSSL<BIO, BIO_free_all>; 47 using ScopedDSA = ScopedOpenSSL<DSA, DSA_free>; 48 using ScopedECDSA_SIG = ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free>; 49 using ScopedEC_GROUP = ScopedOpenSSL<EC_GROUP, EC_GROUP_free>; 50 using ScopedEC_KEY = ScopedOpenSSL<EC_KEY, EC_KEY_free>; 51 using ScopedEC_POINT = ScopedOpenSSL<EC_POINT, EC_POINT_free>; 52 using ScopedEVP_MD_CTX = ScopedOpenSSL<EVP_MD_CTX, EVP_MD_CTX_destroy>; 53 using ScopedEVP_PKEY = ScopedOpenSSL<EVP_PKEY, EVP_PKEY_free>; 54 using ScopedEVP_PKEY_CTX = ScopedOpenSSL<EVP_PKEY_CTX, EVP_PKEY_CTX_free>; 55 using ScopedRSA = ScopedOpenSSL<RSA, RSA_free>; 56 57 // The bytes must have been allocated with OPENSSL_malloc. 58 using ScopedOpenSSLBytes = std::unique_ptr<uint8_t, OpenSSLFree>; 59 60 } // namespace crypto 61 62 #endif // CRYPTO_SCOPED_OPENSSL_TYPES_H_ 63