Working model finished

CMakeLists.txt

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+# CMakeList.txt : CMake project for HOTP, include source and define
+# project specific logic here.
+#
+cmake_minimum_required (VERSION 3.8)
+
+project(HOTP VERSION 1.0.0 LANGUAGES C CXX)
+
+set(CMAKE_C_STANDARD          17)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_C_EXTENSIONS        OFF)
+
+set(OTP_LIBRARY otp_lib)
+
+set(OTP_EXE genotp)
+
+
+set(HEADER_DIR "${CMAKE_SOURCE_DIR}/include")
+set(EXTERNAL_DIR "${CMAKE_SOURCE_DIR}/external")
+set(SOURCE_DIR "${CMAKE_SOURCE_DIR}/src")
+
+set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/")
+include(AddGitSubmodule)
+
+add_git_submodule(external openssl https://github.com/openssl/openssl.git)
+
+set(OPENSSL_PATH "${EXTERNAL_DIR}/openssl")
+
+if (NOT EXISTS "${OPENSSL_PATH}/CMakeLists.txt")
+
+        include(ExternalProject)
+
+        if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+
+            # Add the directory containing Perl to the CMAKE_PREFIX_PATH variable
+            list(APPEND CMAKE_PREFIX_PATH "E://Strawberry_Perl//perl//bin")
+            find_package(Perl)
+
+            if(${PERL_FOUND})
+               message(STATUS "Found perl: ${PERL_EXECUTABLE}")
+            else()
+                message(FATAL_ERROR "Perl executable not found.")
+            endif()
+	        
+	        set(CONFIGURE_COMMAND ${PERL_EXECUTABLE} Configure --prefix=${OPENSSL_PATH}/build --openssldir=${OPENSSL_PATH}/build/ssl )
+         
+        elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+            set(CONFIGURE_COMMAND ./Configure --prefix=${OPENSSL_PATH}/build --openssldir=${OPENSSL_PATH}/build/ssl )
+
+        endif()
+        
+        find_program(MAKE_EXE NAMES nmake make)
+        
+        if(MAKE_EXE)
+            message(STATUS "Found platform specific make executable: ${MAKE_EXE}")
+        else()
+            message(FATAL_ERROR "nmake not found. Please make sure it is installed.")
+        endif()
+
+
+        if(NOT EXISTS "${OPENSSL_PATH}/build")
+
+            execute_process(
+                COMMAND ${CONFIGURE_COMMAND}
+                WORKING_DIRECTORY ${OPENSSL_PATH}
+                RESULT_VARIABLE result
+            )
+
+
+            if(result)
+                message(FATAL_ERROR "Configuration Command failed.")
+            endif()
+
+            execute_process(
+                COMMAND ${MAKE_EXE}
+                WORKING_DIRECTORY ${OPENSSL_PATH}
+                RESULT_VARIABLE result
+            )
+
+            if(result)
+                message(FATAL_ERROR "make Command failed.")
+            endif()
+
+            set(MAKE_EXE_INSTALL ${MAKE_EXE} install)
+
+            execute_process(
+                COMMAND ${MAKE_EXE_INSTALL}
+                WORKING_DIRECTORY ${OPENSSL_PATH}
+                RESULT_VARIABLE result
+            )
+
+            if(result)
+                message(FATAL_ERROR "make install Command failed.")
+            endif()
+
+        endif()
+
+        #This will be executed during build time not CMake Time.
+        #ExternalProject_Add(
+        #    OpenSSL_deps
+        #    PREFIX ${CMAKE_BINARY_DIR}/external
+        #    DOWNLOAD_COMMAND ""  # No download command since we're not downloading, assuming Makefile is already present
+        #    SOURCE_DIR ${OPENSSL_PATH}  # Specify the path to the directory containing the Makefile
+        #    BINARY_DIR ${OPENSSL_PATH}/lib #All the build file will be present here, if BUILD_IN_SOURCE is not set.
+        #    CONFIGURE_COMMAND ${CONFIGURE_COMMAND}  # No configure command needed for Makefile-based projects
+        #    BUILD_COMMAND ${MAKE_EXE}  # Command to build the project using make
+        #    INSTALL_COMMAND ""  # No install command needed for Makefile-based projects
+        #    BUILD_IN_SOURCE 0  # Build the project in the source directory
+        #)
+
+endif()
+
+
+set(OPENSSL_USE_STATIC_LIBS TRUE)
+find_package(OpenSSL PATHS ${OPENSSL_PATH})
+
+if( OPENSSL_FOUND )
+    message(STATUS "OpenSSL found: ${OPENSSL_INCLUDE_DIR}")
+    message(STATUS "OpenSSL found: ${OPENSSL_CRYPTO_LIBRARY}")
+    message(STATUS "OpenSSL found: ${OPENSSL_SSL_LIBRARY}")
+    message(STATUS "OpenSSL found: ${OPENSSL_LIBRARIES}")
+else()
+    message(FATAL_ERROR "OpenSSL not found")
+endif()
+
+set(OPENSSL_LIB
+    ${OPENSSL_CRYPTO_LIBRARY}
+    ${OPENSSL_SSL_LIBRARY}
+    ${OPENSSL_LIBRARIES})
+
+set(OPENSSL_HEADER
+        ${OPENSSL_INCLUDE_DIR})
+
+add_subdirectory(src)
+add_subdirectory(app)
+
+# TODO: Add tests and install targets if needed.