78 lines
3.1 KiB
C++
78 lines
3.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Google LLC.
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//
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// This software is licensed under the terms defined in the Widevine Master
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// License Agreement. For a copy of this agreement, please contact
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// widevine-licensing@google.com.
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////////////////////////////////////////////////////////////////////////////////
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//
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// RAII wrapper classes for cleaning up various OpenSSL dynamically allocated
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// structures.
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#ifndef COMMON_OPENSSL_UTIL_H__
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#define COMMON_OPENSSL_UTIL_H__
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#include "openssl/bio.h"
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#include "openssl/evp.h"
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#include "openssl/rsa.h"
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#include "openssl/x509v3.h"
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template <typename T, void (*func)(T *)>
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struct OpenSSLDeleter {
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void operator()(T *obj) { func(obj); }
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};
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template <typename StackType, typename T, void (*func)(T *)>
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struct OpenSSLStackDeleter {
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void operator()(StackType *obj) {
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sk_pop_free(reinterpret_cast<_STACK *>(obj),
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reinterpret_cast<void (*)(void *)>(func));
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}
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};
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template <typename StackType>
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struct OpenSSLStackOnlyDeleter {
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void operator()(StackType *obj) { sk_free(reinterpret_cast<_STACK *>(obj)); }
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};
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template <typename T, void (*func)(T *)>
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using ScopedOpenSSLType = std::unique_ptr<T, OpenSSLDeleter<T, func>>;
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template <typename StackType, typename T, void (*func)(T *)>
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using ScopedOpenSSLStack =
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std::unique_ptr<StackType, OpenSSLStackDeleter<StackType, T, func>>;
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template <typename StackType>
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using ScopedOpenSSLStackOnly =
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std::unique_ptr<StackType, OpenSSLStackOnlyDeleter<StackType>>;
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using ScopedBIGNUM = ScopedOpenSSLType<BIGNUM, BN_free>;
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using ScopedBIO = ScopedOpenSSLType<BIO, BIO_vfree>;
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using ScopedPKEY = ScopedOpenSSLType<EVP_PKEY, EVP_PKEY_free>;
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using ScopedRSA = ScopedOpenSSLType<RSA, RSA_free>;
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using ScopedX509 = ScopedOpenSSLType<X509, X509_free>;
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using ScopedX509Extension =
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ScopedOpenSSLType<X509_EXTENSION, X509_EXTENSION_free>;
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using ScopedX509Name = ScopedOpenSSLType<X509_NAME, X509_NAME_free>;
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using ScopedX509NameEntry =
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ScopedOpenSSLType<X509_NAME_ENTRY, X509_NAME_ENTRY_free>;
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using ScopedX509Store = ScopedOpenSSLType<X509_STORE, X509_STORE_free>;
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using ScopedX509StoreCtx =
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ScopedOpenSSLType<X509_STORE_CTX, X509_STORE_CTX_free>;
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using ScopedX509Req = ScopedOpenSSLType<X509_REQ, X509_REQ_free>;
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using ScopedAsn1UtcTime = ScopedOpenSSLType<ASN1_UTCTIME, ASN1_UTCTIME_free>;
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using ScopedAsn1Utc8String =
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ScopedOpenSSLType<ASN1_UTF8STRING, ASN1_UTF8STRING_free>;
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using ScopedAsn1Integer = ScopedOpenSSLType<ASN1_INTEGER, ASN1_INTEGER_free>;
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using ScopedAsn1Object = ScopedOpenSSLType<ASN1_OBJECT, ASN1_OBJECT_free>;
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using ScopedAsn1OctetString =
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ScopedOpenSSLType<ASN1_OCTET_STRING, ASN1_OCTET_STRING_free>;
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// XxxStack deallocates the stack and its members while XxxStackOnly deallocates
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// the stack only.
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using ScopedX509Stack = ScopedOpenSSLStack<STACK_OF(X509), X509, X509_free>;
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using ScopedX509StackOnly = ScopedOpenSSLStackOnly<STACK_OF(X509)>;
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using ScopedX509InfoStack =
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ScopedOpenSSLStack<STACK_OF(X509_INFO), X509_INFO, X509_INFO_free>;
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using ScopedX509InfoStackOnly = ScopedOpenSSLStackOnly<STACK_OF(X509_INFO)>;
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#endif // COMMON_OPENSSL_UTIL_H__
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