Use boringssl instead of openssl on Android

This is because openssl3 does not support the system certificates on
Android and does not seem to plan to support them.

third_party/CMakeLists.txt

@@ -14,7 +14,11 @@ if (SUPERBUILD)
     build_target(liblzma)
 
     if(NOT BUILD_WITHOUT_CURL)
-        build_target(openssl)
+        if(ANDROID)
+            build_target(boringssl)
+        else()
+            build_target(openssl)
+        endif()
 
         if(NOT IOS)
             build_target(zlib-ng)
@@ -25,7 +29,11 @@ if (SUPERBUILD)
 
     if(BUILD_MAVSDK_SERVER)
         if (BUILD_WITHOUT_CURL)
-            build_target(openssl)
+            if(ANDROID)
+                build_target(boringssl)
+            else()
+                build_target(openssl)
+            endif()
         endif()
 
         build_target(cares)

third_party/boringssl/CMakeLists.txt

@@ -0,0 +1,52 @@
+cmake_minimum_required(VERSION 3.10.2)
+
+project(external-boringssl)
+include(ExternalProject)
+
+list(APPEND CMAKE_ARGS
+    "-DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}"
+    "-DCMAKE_TOOLCHAIN_FILE:PATH=${CMAKE_TOOLCHAIN_FILE}"
+    "-DCMAKE_POSITION_INDEPENDENT_CODE=ON"
+    "-DBUILD_SHARED_LIBS=OFF"
+    )
+
+if(ANDROID)
+    list(APPEND CMAKE_ARGS
+        "-DANDROID_ABI:STRING=${ANDROID_ABI}"
+        "-DANDROID_STL:STRING=${ANDROID_STL}"
+        "-DANDROID_PLATFORM=${ANDROID_PLATFORM}"
+        )
+elseif(IOS)
+    list(APPEND CMAKE_ARGS
+        "-DIOS_PLATFORM=${IOS_PLATFORM}"
+        )
+endif()
+
+# We disable ASM optimizations for MSVC and iOS (see above for iOS), which
+# might have a performance impact on secure communications.
+# This should be benchmarked/evaluated before we decide if it is worth
+# enabling them or not in our case.
+#
+# More information here:  https://github.com/grpc/grpc/issues/9440
+if (IOS)
+    list(APPEND CMAKE_ARGS
+        "-DOPENSSL_NO_ASM=ON"
+        )
+else()
+    list(APPEND CMAKE_ARGS
+        "-DOPENSSL_NO_ASM=OFF"
+        )
+endif()
+
+message(STATUS "Preparing external project \"boringssl\" with args:")
+foreach(CMAKE_ARG ${CMAKE_ARGS})
+    message(STATUS "-- ${CMAKE_ARG}")
+endforeach()
+
+ExternalProject_add(
+    boringssl
+    URL https://github.com/google/boringssl/releases/download/0.20241203.0/boringssl-0.20241203.0.tar.gz
+    URL_MD5 3320699951028ba64150b5296bc9d0e6
+    PREFIX boringssl
+    CMAKE_ARGS "${CMAKE_ARGS}"
+    )

third_party/grpc/CMakeLists.txt

@@ -53,7 +53,7 @@ endforeach()
 
 ExternalProject_add(
     grpc
-    URL https://github.com/grpc/grpc/archive/v1.61.1.tar.gz
+    URL https://github.com/grpc/grpc/archive/v1.68.2.tar.gz
     PREFIX grpc
     CMAKE_ARGS "${CMAKE_ARGS}"
     )