Merge pull request SoftEtherVPN#2022 from siddharth-narayan/built-in-…

…post-quantum

Add built in post quantum functionality

.gitmodules

@@ -10,3 +10,9 @@
 [submodule "src/libhamcore"]
 	path = src/libhamcore
 	url = https://github.com/SoftEtherVPN/libhamcore.git
+[submodule "src/Mayaqua/3rdparty/oqs-provider"]
+	path = src/Mayaqua/3rdparty/oqs-provider
+	url = https://github.com/open-quantum-safe/oqs-provider.git
+[submodule "src/Mayaqua/3rdparty/liboqs"]
+	path = src/Mayaqua/3rdparty/liboqs
+	url = https://github.com/open-quantum-safe/liboqs.git

src/Mayaqua/3rdparty/Findliboqs.cmake

@@ -0,0 +1,2 @@
+set(oqs_FOUND TRUE)
+add_library(OQS::oqs ALIAS oqs)

src/Mayaqua/CMakeLists.txt

@@ -18,6 +18,22 @@ set_target_properties(mayaqua
 
 find_package(OpenSSL REQUIRED)
 
+if(OPENSSL_VERSION VERSION_LESS "3") # Disable oqsprovider when OpenSSL version < 3
+  add_definitions(-DSKIP_OQS_PROVIDER)
+else()
+  set(OQS_BUILD_ONLY_LIB ON CACHE BOOL "Set liboqs to build only the library (no tests)")
+  set(BUILD_TESTING OFF CACHE BOOL "By setting this to OFF, no tests or examples will be compiled.")
+  set(OQS_PROVIDER_BUILD_STATIC ON CACHE BOOL "Build a static library instead of a shared library") # Build oqsprovider as a static library (defaults to shared)
+  list(PREPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/src/Mayaqua/3rdparty/")
+
+  add_subdirectory(3rdparty/liboqs)
+  add_subdirectory(3rdparty/oqs-provider)
+
+  target_include_directories(oqsprovider PUBLIC ${CMAKE_CURRENT_BINARY_DIR}/3rdparty/liboqs/include)
+  set_property(TARGET oqsprovider PROPERTY POSITION_INDEPENDENT_CODE ON)
+  target_link_libraries(mayaqua PRIVATE oqsprovider)
+endif()
+
 include(CheckSymbolExists)
 
 set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})

src/Mayaqua/Encrypt.c

@@ -42,6 +42,10 @@
 #include <openssl/x509v3.h>
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 #include <openssl/provider.h>
+// Static oqsprovider initialization function
+#ifndef SKIP_OQS_PROVIDER
+	extern OSSL_provider_init_fn oqs_provider_init;
+#endif
 #endif
 
 #ifdef _MSC_VER
@@ -4005,7 +4009,13 @@ void InitCryptLibrary()
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 	ossl_provider_default = OSSL_PROVIDER_load(NULL, "legacy");
 	ossl_provider_legacy = OSSL_PROVIDER_load(NULL, "default");
-	ossl_provider_oqsprovider = OSSL_PROVIDER_load(NULL, "oqsprovider");
+
+	char *oqs_provider_name = "oqsprovider";
+	#ifndef SKIP_OQS_PROVIDER
+		// Registers "oqsprovider" as a provider -- necessary because oqsprovider is built in now.
+		OSSL_PROVIDER_add_builtin(NULL, oqs_provider_name, oqs_provider_init); 
+	#endif
+	ossl_provider_oqsprovider = OSSL_PROVIDER_load(NULL, oqs_provider_name);
 #endif
 
 	ssl_clientcert_index = SSL_get_ex_new_index(0, "struct SslClientCertInfo *", NULL, NULL, NULL);