Export media_cas_packager_sdk

common/openssl_util.h

@@ -0,0 +1,77 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2016 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+//
+// RAII wrapper classes for cleaning up various OpenSSL dynamically allocated
+// structures.
+
+#ifndef COMMON_OPENSSL_UTIL_H__
+#define COMMON_OPENSSL_UTIL_H__
+
+#include "openssl/bio.h"
+#include "openssl/evp.h"
+#include "openssl/rsa.h"
+#include "openssl/x509v3.h"
+
+template <typename T, void (*func)(T *)>
+struct OpenSSLDeleter {
+  void operator()(T *obj) { func(obj); }
+};
+
+template <typename StackType, typename T, void (*func)(T *)>
+struct OpenSSLStackDeleter {
+  void operator()(StackType *obj) {
+    sk_pop_free(reinterpret_cast<_STACK *>(obj),
+                reinterpret_cast<void (*)(void *)>(func));
+  }
+};
+
+template <typename StackType>
+struct OpenSSLStackOnlyDeleter {
+  void operator()(StackType *obj) { sk_free(reinterpret_cast<_STACK *>(obj)); }
+};
+
+template <typename T, void (*func)(T *)>
+using ScopedOpenSSLType = std::unique_ptr<T, OpenSSLDeleter<T, func>>;
+template <typename StackType, typename T, void (*func)(T *)>
+using ScopedOpenSSLStack =
+    std::unique_ptr<StackType, OpenSSLStackDeleter<StackType, T, func>>;
+template <typename StackType>
+using ScopedOpenSSLStackOnly =
+    std::unique_ptr<StackType, OpenSSLStackOnlyDeleter<StackType>>;
+
+using ScopedBIGNUM = ScopedOpenSSLType<BIGNUM, BN_free>;
+using ScopedBIO = ScopedOpenSSLType<BIO, BIO_vfree>;
+using ScopedPKEY = ScopedOpenSSLType<EVP_PKEY, EVP_PKEY_free>;
+using ScopedRSA = ScopedOpenSSLType<RSA, RSA_free>;
+using ScopedX509 = ScopedOpenSSLType<X509, X509_free>;
+using ScopedX509Extension =
+    ScopedOpenSSLType<X509_EXTENSION, X509_EXTENSION_free>;
+using ScopedX509Name = ScopedOpenSSLType<X509_NAME, X509_NAME_free>;
+using ScopedX509NameEntry =
+    ScopedOpenSSLType<X509_NAME_ENTRY, X509_NAME_ENTRY_free>;
+using ScopedX509Store = ScopedOpenSSLType<X509_STORE, X509_STORE_free>;
+using ScopedX509StoreCtx =
+    ScopedOpenSSLType<X509_STORE_CTX, X509_STORE_CTX_free>;
+using ScopedX509Req = ScopedOpenSSLType<X509_REQ, X509_REQ_free>;
+using ScopedAsn1UtcTime = ScopedOpenSSLType<ASN1_UTCTIME, ASN1_UTCTIME_free>;
+using ScopedAsn1Utc8String =
+    ScopedOpenSSLType<ASN1_UTF8STRING, ASN1_UTF8STRING_free>;
+using ScopedAsn1Integer = ScopedOpenSSLType<ASN1_INTEGER, ASN1_INTEGER_free>;
+using ScopedAsn1Object = ScopedOpenSSLType<ASN1_OBJECT, ASN1_OBJECT_free>;
+using ScopedAsn1OctetString =
+    ScopedOpenSSLType<ASN1_OCTET_STRING, ASN1_OCTET_STRING_free>;
+
+// XxxStack deallocates the stack and its members while XxxStackOnly deallocates
+// the stack only.
+using ScopedX509Stack = ScopedOpenSSLStack<STACK_OF(X509), X509, X509_free>;
+using ScopedX509StackOnly = ScopedOpenSSLStackOnly<STACK_OF(X509)>;
+using ScopedX509InfoStack =
+    ScopedOpenSSLStack<STACK_OF(X509_INFO), X509_INFO, X509_INFO_free>;
+using ScopedX509InfoStackOnly = ScopedOpenSSLStackOnly<STACK_OF(X509_INFO)>;
+
+#endif  // COMMON_OPENSSL_UTIL_H__