From da3ce0369357603e134bda095504d8060f0c4bb1 Mon Sep 17 00:00:00 2001
From: Guillaume Hetier <hetier.guillaume@gmail.com>
Date: Mon, 9 Mar 2026 10:28:05 -0700
Subject: [PATCH] Revert "Added support for custom OpenSSL selection (#5799)"

This reverts commit ac1b4d561f6d30c725c83b811bc6c395f9e5fc3b.
---
 CMakeLists.txt            | 47 +++++++--------------------------------
 submodules/CMakeLists.txt |  4 ++--
 2 files changed, 10 insertions(+), 41 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1eb1933add..37ca97af20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -111,9 +111,6 @@ option(QUIC_CI "CI Specific build" OFF)
 option(QUIC_SKIP_CI_CHECKS "Disable CI specific build checks" OFF)
 option(QUIC_TELEMETRY_ASSERTS "Enable telemetry asserts in release builds" OFF)
 option(QUIC_USE_SYSTEM_LIBCRYPTO "Use system libcrypto if quictls TLS" OFF)
-option(QUIC_USE_EXTERNAL_OPENSSL "Use external OpenSSL instead of building from submodules" OFF)
-set(QUIC_OPENSSL_INCLUDE_DIR "" CACHE PATH "Path to OpenSSL include directory")
-set(QUIC_OPENSSL_LIB_DIR "" CACHE PATH "Path to OpenSSL library directory")
 option(QUIC_HIGH_RES_TIMERS "Configure the system to use high resolution timers" OFF)
 option(QUIC_OFFICIAL_RELEASE "Configured the build for an official release" OFF)
 set(QUIC_FOLDER_PREFIX "" CACHE STRING "Optional prefix for source group folders when using an IDE generator")
@@ -762,46 +759,18 @@ endif()
 if(QUIC_TLS_LIB STREQUAL "quictls" OR QUIC_TLS_LIB STREQUAL "openssl")
     add_library(OpenSSL INTERFACE)
 
-    # OpenSSL versions before 3.5.0 do not expose these APIs.
-    if(QUIC_TLS_LIB STREQUAL "quictls" AND (QUIC_USE_EXTERNAL_OPENSSL OR QUIC_OPENSSL_INCLUDE_DIR OR QUIC_OPENSSL_LIB_DIR))
-        message(FATAL_ERROR "Manual OpenSSL selection is not supported with the 'quictls'. 'quictls' must be built from submodules to ensure static linkage with required QUIC APIs. Use 'openssl' provider for external 3.5.0+ OpenSSL.")
-    endif()
-
-    # Only 'openssl' provider supports external selection for now
-    if(QUIC_TLS_LIB STREQUAL "openssl" AND (QUIC_USE_EXTERNAL_OPENSSL OR QUIC_OPENSSL_INCLUDE_DIR OR QUIC_OPENSSL_LIB_DIR))
-        add_library(OpenSSLQuic INTERFACE)
-        if(QUIC_OPENSSL_INCLUDE_DIR AND QUIC_OPENSSL_LIB_DIR)
-            target_include_directories(OpenSSLQuic INTERFACE ${QUIC_OPENSSL_INCLUDE_DIR})
-            find_library(LIB_CRYPTO NAMES crypto libcrypto PATHS ${QUIC_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
-            if(NOT LIB_CRYPTO)
-                message(FATAL_ERROR "libcrypto not found in ${QUIC_OPENSSL_LIB_DIR}")
-            endif()
-            find_library(LIB_SSL NAMES ssl libssl PATHS ${QUIC_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
-            if(NOT LIB_SSL)
-                message(FATAL_ERROR "libssl not found in ${QUIC_OPENSSL_LIB_DIR}")
-            endif()
-            target_link_libraries(OpenSSLQuic INTERFACE ${LIB_SSL} ${LIB_CRYPTO})
-        elseif(QUIC_OPENSSL_INCLUDE_DIR OR QUIC_OPENSSL_LIB_DIR)
-            message(FATAL_ERROR "Both QUIC_OPENSSL_INCLUDE_DIR and QUIC_OPENSSL_LIB_DIR must be set to select custom OpenSSL version.")
-        else()
-            find_package(OpenSSL 3.5.0 REQUIRED)
-            target_link_libraries(OpenSSLQuic INTERFACE OpenSSL::SSL OpenSSL::Crypto)
-        endif()
-        add_library(MsQuic::OpenSSL ALIAS OpenSSLQuic)
-    else()
-        include(FetchContent)
+    include(FetchContent)
 
-        FetchContent_Declare(
-            OpenSSLQuic
-            SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/submodules
-            CMAKE_ARGS "-DQUIC_USE_SYSTEM_LIBCRYPTO=${QUIC_USE_SYSTEM_LIBCRYPTO}"
-        )
-        FetchContent_MakeAvailable(OpenSSLQuic)
-    endif()
+    FetchContent_Declare(
+        OpenSSLQuic
+        SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/submodules
+        CMAKE_ARGS "-DQUIC_USE_SYSTEM_LIBCRYPTO=${QUIC_USE_SYSTEM_LIBCRYPTO}"
+    )
+    FetchContent_MakeAvailable(OpenSSLQuic)
 
     target_link_libraries(OpenSSL
         INTERFACE
-        MsQuic::OpenSSL
+        OpenSSLQuic::OpenSSLQuic
     )
 endif()
 
diff --git a/submodules/CMakeLists.txt b/submodules/CMakeLists.txt
index a46ddee355..1723852ca3 100644
--- a/submodules/CMakeLists.txt
+++ b/submodules/CMakeLists.txt
@@ -164,7 +164,7 @@ if (WIN32)
         $<$<NOT:$<CONFIG:Debug>>:${LIBCRYPTO_PATH}>
     )
 
-    add_library(MsQuic::OpenSSL ALIAS OpenSSLQuic)
+    add_library(OpenSSLQuic::OpenSSLQuic ALIAS OpenSSLQuic)
 
 else()
 
@@ -387,6 +387,6 @@ else()
         )
     endif()
 
-    add_library(MsQuic::OpenSSL ALIAS OpenSSLQuic)
+    add_library(OpenSSLQuic::OpenSSLQuic ALIAS OpenSSLQuic)
 
 endif()