Init

Source/include/slikenet/crypto/cryptomanager.h

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+/*
+ *  Copyright (c) 2019, SLikeSoft UG (haftungsbeschr<68>nkt)
+ *
+ *  This source code is  licensed under the MIT-style license found in the license.txt
+ *  file in the root directory of this source tree.
+ */
+#pragma once
+
+#include <openssl/evp.h> // used for EVP_xxxx
+
+namespace SLNet
+{
+	namespace Experimental
+	{
+		namespace Crypto
+		{
+			class CCryptoManager
+			{
+			private:
+				// class members
+				// note: using distinct contexts for encryption/decryption to prevent potential for race conditions
+				// #med - consider moving to SessionEncrypter class
+				static EVP_CIPHER_CTX* m_decryptionContext;
+				static EVP_CIPHER_CTX* m_encryptionContext;
+				static unsigned char m_initializationVector[EVP_MAX_IV_LENGTH];
+				static unsigned char m_sessionKey[EVP_MAX_KEY_LENGTH];
+				static bool m_Initialized;
+
+			public:
+				// initialization
+				static bool Initialize();
+
+			public:
+				// session encryption
+				static bool EncryptSessionData(const unsigned char* plaintext, size_t dataLength, unsigned char* outBuffer, size_t& inOutBufferSize);
+				static bool DecryptSessionData(const unsigned char* encryptedtext, size_t dataLength, unsigned char* outBuffer, size_t& inOutBufferSize);
+				static bool GetRequiredEncryptionBufferSize(size_t& encryptionDataByteLength);
+
+			public:
+				// secure memory management methods
+				// #med - consider moving to separate class (SecureMemory/MemoryManager)
+				static void* AllocateSecureMemory(size_t size);
+				static void FreeSecureMemory(void* pointer, size_t size);
+				static void SecureClearMemory(void* pointer, size_t dataSize);
+			};
+		}
+	}
+}