ClickHouse/cmake/find/ssl.cmake

# Needed when securely connecting to an external server, e.g.
# clickhouse-client --host ... --secure
option(ENABLE_SSL "Enable ssl" ${ENABLE_LIBRARIES})

if(NOT ENABLE_SSL)
    if (USE_INTERNAL_SSL_LIBRARY)
        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal ssl library with ENABLE_SSL=OFF")
    endif()
    return()
endif()

option(USE_INTERNAL_SSL_LIBRARY "Set to FALSE to use system *ssl library instead of bundled" ON)

if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/boringssl/README.md")
    if(USE_INTERNAL_SSL_LIBRARY)
        message(WARNING "submodule contrib/boringssl is missing. to fix try run: \n git submodule update --init")
        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find internal ssl library")
    endif()
    set(USE_INTERNAL_SSL_LIBRARY 0)
    set(MISSING_INTERNAL_SSL_LIBRARY 1)
endif()

set (OPENSSL_USE_STATIC_LIBS ${USE_STATIC_LIBRARIES})

if (NOT USE_INTERNAL_SSL_LIBRARY)
    if (APPLE)
        set (OPENSSL_ROOT_DIR "/usr/local/opt/openssl" CACHE INTERNAL "")
        # https://rt.openssl.org/Ticket/Display.html?user=guest&pass=guest&id=2232
        if (USE_STATIC_LIBRARIES)
            message(WARNING "Disable USE_STATIC_LIBRARIES if you have linking problems with OpenSSL on MacOS")
        endif ()
    endif ()
    find_package (OpenSSL)

    if (NOT OPENSSL_FOUND)
        # Try to find manually.
        set (OPENSSL_INCLUDE_PATHS "/usr/local/opt/openssl/include")
        set (OPENSSL_PATHS "/usr/local/opt/openssl/lib")
        find_path (OPENSSL_INCLUDE_DIR NAMES openssl/ssl.h PATHS ${OPENSSL_INCLUDE_PATHS})
        find_library (OPENSSL_SSL_LIBRARY ssl PATHS ${OPENSSL_PATHS})
        find_library (OPENSSL_CRYPTO_LIBRARY crypto PATHS ${OPENSSL_PATHS})
        if (OPENSSL_SSL_LIBRARY AND OPENSSL_CRYPTO_LIBRARY AND OPENSSL_INCLUDE_DIR)
            set (OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
            set (OPENSSL_FOUND 1)
        endif ()
    endif ()

    if (NOT OPENSSL_FOUND)
        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system ssl")
    endif()
endif ()

if (NOT OPENSSL_FOUND AND NOT MISSING_INTERNAL_SSL_LIBRARY)
    set (USE_INTERNAL_SSL_LIBRARY 1)
    set (OPENSSL_ROOT_DIR "${ClickHouse_SOURCE_DIR}/contrib/boringssl")
    set (OPENSSL_INCLUDE_DIR "${OPENSSL_ROOT_DIR}/include")
    set (OPENSSL_CRYPTO_LIBRARY crypto)
    set (OPENSSL_SSL_LIBRARY ssl)
    set (OPENSSL_FOUND 1)
    set (OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
endif ()

if(OPENSSL_FOUND)
    # we need keep OPENSSL_FOUND for many libs in contrib
    set(USE_SSL 1)
endif()

# used by new poco
# part from /usr/share/cmake-*/Modules/FindOpenSSL.cmake, with removed all "EXISTS "
if(OPENSSL_FOUND AND NOT USE_INTERNAL_SSL_LIBRARY)
  if(NOT TARGET OpenSSL::Crypto AND
      (OPENSSL_CRYPTO_LIBRARY OR
        LIB_EAY_LIBRARY_DEBUG OR
        LIB_EAY_LIBRARY_RELEASE)
      )
    add_library(OpenSSL::Crypto UNKNOWN IMPORTED)
    set_target_properties(OpenSSL::Crypto PROPERTIES
      INTERFACE_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}")
    if(OPENSSL_CRYPTO_LIBRARY)
      set_target_properties(OpenSSL::Crypto PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES "C"
        IMPORTED_LOCATION "${OPENSSL_CRYPTO_LIBRARY}")
    endif()
    if(LIB_EAY_LIBRARY_RELEASE)
      set_property(TARGET OpenSSL::Crypto APPEND PROPERTY
        IMPORTED_CONFIGURATIONS RELEASE)
      set_target_properties(OpenSSL::Crypto PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
        IMPORTED_LOCATION_RELEASE "${LIB_EAY_LIBRARY_RELEASE}")
    endif()
    if(LIB_EAY_LIBRARY_DEBUG)
      set_property(TARGET OpenSSL::Crypto APPEND PROPERTY
        IMPORTED_CONFIGURATIONS DEBUG)
      set_target_properties(OpenSSL::Crypto PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
        IMPORTED_LOCATION_DEBUG "${LIB_EAY_LIBRARY_DEBUG}")
    endif()
  endif()
  if(NOT TARGET OpenSSL::SSL AND
      (OPENSSL_SSL_LIBRARY OR
        SSL_EAY_LIBRARY_DEBUG OR
        SSL_EAY_LIBRARY_RELEASE)
      )
    add_library(OpenSSL::SSL UNKNOWN IMPORTED)
    set_target_properties(OpenSSL::SSL PROPERTIES
      INTERFACE_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}")
    if(OPENSSL_SSL_LIBRARY)
      set_target_properties(OpenSSL::SSL PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES "C"
        IMPORTED_LOCATION "${OPENSSL_SSL_LIBRARY}")
    endif()
    if(SSL_EAY_LIBRARY_RELEASE)
      set_property(TARGET OpenSSL::SSL APPEND PROPERTY
        IMPORTED_CONFIGURATIONS RELEASE)
      set_target_properties(OpenSSL::SSL PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
        IMPORTED_LOCATION_RELEASE "${SSL_EAY_LIBRARY_RELEASE}")
    endif()
    if(SSL_EAY_LIBRARY_DEBUG)
      set_property(TARGET OpenSSL::SSL APPEND PROPERTY
        IMPORTED_CONFIGURATIONS DEBUG)
      set_target_properties(OpenSSL::SSL PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
        IMPORTED_LOCATION_DEBUG "${SSL_EAY_LIBRARY_DEBUG}")
    endif()
    if(TARGET OpenSSL::Crypto)
      set_target_properties(OpenSSL::SSL PROPERTIES
        INTERFACE_LINK_LIBRARIES OpenSSL::Crypto)
    endif()
  endif()
endif()

message (STATUS "Using ssl=${USE_SSL}: ${OPENSSL_INCLUDE_DIR} : ${OPENSSL_LIBRARIES}")