#*************************************************************************** # _ _ ____ _ # Project ___| | | | _ \| | # / __| | | | |_) | | # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # # Copyright (C) Daniel Stenberg, <[email protected]>, et al. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms # are also available at https://curl.se/docs/copyright.html. # # You may opt to use, copy, modify, merge, publish, distribute and/or sell # copies of the Software, and permit persons to whom the Software is # furnished to do so, under the terms of the COPYING file. # # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY # KIND, either express or implied. # # SPDX-License-Identifier: curl # ########################################################################### # Find the GSS Kerberos library # # Input variables: # # - `GSS_ROOT_DIR`: Set this variable to the root installation of GSS. (also supported as environment) # # Result variables: # # - `GSS_FOUND`: System has the Heimdal library. # - `GSS_FLAVOUR`: "GNU", "MIT" or "Heimdal" if anything found. # - `GSS_INCLUDE_DIRS`: The GSS include directories. # - `GSS_LIBRARIES`: The GSS library names. # - `GSS_LIBRARY_DIRS`: The GSS library directories. # - `GSS_PC_REQUIRES`: The GSS pkg-config packages. # - `GSS_CFLAGS`: Required compiler flags. # - `GSS_VERSION`: This is set to version advertised by pkg-config or read from manifest. # In case the library is found but no version info available it is set to "unknown" set(_gnu_modname "gss") set(_mit_modname "mit-krb5-gssapi") set(_heimdal_modname "heimdal-gssapi") include(CheckIncludeFile) include(CheckIncludeFiles) include(CheckTypeSize) set(_gss_root_hints "${GSS_ROOT_DIR}" "$ENV{GSS_ROOT_DIR}" ) # Try to find library using system pkg-config if user did not specify root dir if(NOT GSS_ROOT_DIR AND NOT "$ENV{GSS_ROOT_DIR}") if(CURL_USE_PKGCONFIG) find_package(PkgConfig QUIET) pkg_search_module(_GSS ${_gnu_modname} ${_mit_modname} ${_heimdal_modname}) list(APPEND _gss_root_hints "${_GSS_PREFIX}") endif() if(WIN32) list(APPEND _gss_root_hints "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos;InstallDir]") endif() endif() if(NOT _GSS_FOUND) # Not found by pkg-config. Let us take more traditional approach. find_file(_gss_configure_script NAMES "krb5-config" HINTS ${_gss_root_hints} PATH_SUFFIXES "bin" NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH ) # If not found in user-supplied directories, maybe system knows better find_file(_gss_configure_script NAMES "krb5-config" PATH_SUFFIXES "bin" ) if(_gss_configure_script) execute_process( COMMAND ${_gss_configure_script} "--cflags" "gssapi" OUTPUT_VARIABLE _GSS_CFLAGS RESULT_VARIABLE _gss_configure_failed OUTPUT_STRIP_TRAILING_WHITESPACE ) message(STATUS "FindGSS krb5-config --cflags: ${_GSS_CFLAGS}") if(NOT _gss_configure_failed) # 0 means success # Should also work in an odd case when multiple directories are given string(STRIP "${_GSS_CFLAGS}" _GSS_CFLAGS) string(REGEX REPLACE " +-I" ";" _GSS_CFLAGS "${_GSS_CFLAGS}") string(REGEX REPLACE " +-([^I][^ \\t;]*)" ";-\\1" _GSS_CFLAGS "${_GSS_CFLAGS}") foreach(_flag IN LISTS _GSS_CFLAGS) if(_flag MATCHES "^-I") string(REGEX REPLACE "^-I" "" _val "${_flag}") list(APPEND _GSS_INCLUDE_DIRS "${_val}") else() list(APPEND _GSS_CFLAGS "${_flag}") endif() endforeach() endif() execute_process( COMMAND ${_gss_configure_script} "--libs" "gssapi" OUTPUT_VARIABLE _gss_lib_flags RESULT_VARIABLE _gss_configure_failed OUTPUT_STRIP_TRAILING_WHITESPACE ) message(STATUS "FindGSS krb5-config --libs: ${_gss_lib_flags}") if(NOT _gss_configure_failed) # 0 means success # This script gives us libraries and link directories. Blah. We have to deal with it. string(STRIP "${_gss_lib_flags}" _gss_lib_flags) string(REGEX REPLACE " +-(L|l)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}") string(REGEX REPLACE " +-([^Ll][^ \\t;]*)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}") foreach(_flag IN LISTS _gss_lib_flags) if(_flag MATCHES "^-l") string(REGEX REPLACE "^-l" "" _val "${_flag}") list(APPEND _GSS_LIBRARIES "${_val}") elseif(_flag MATCHES "^-L") string(REGEX REPLACE "^-L" "" _val "${_flag}") list(APPEND _GSS_LIBRARY_DIRS "${_val}") endif() endforeach() endif() execute_process( COMMAND ${_gss_configure_script} "--version" OUTPUT_VARIABLE _GSS_VERSION RESULT_VARIABLE _gss_configure_failed OUTPUT_STRIP_TRAILING_WHITESPACE ) # Older versions may not have the "--version" parameter. In this case we just do not care. if(_gss_configure_failed) set(_GSS_VERSION 0) endif() execute_process( COMMAND ${_gss_configure_script} "--vendor" OUTPUT_VARIABLE _gss_vendor RESULT_VARIABLE _gss_configure_failed OUTPUT_STRIP_TRAILING_WHITESPACE ) # Older versions may not have the "--vendor" parameter. In this case we just do not care. if(_gss_configure_failed) set(GSS_FLAVOUR "Heimdal") # most probably, should not really matter else() if(_gss_vendor MATCHES "H|heimdal") set(GSS_FLAVOUR "Heimdal") else() set(GSS_FLAVOUR "MIT") endif() endif() else() # Either there is no config script or we are on a platform that does not provide one (Windows?) find_path(_GSS_INCLUDE_DIRS NAMES "gssapi/gssapi.h" HINTS ${_gss_root_hints} PATH_SUFFIXES "include" "inc" ) if(_GSS_INCLUDE_DIRS) # jay, we have found something cmake_push_check_state() list(APPEND CMAKE_REQUIRED_INCLUDES "${_GSS_INCLUDE_DIRS}") check_include_files("gssapi/gssapi_generic.h;gssapi/gssapi_krb5.h" _gss_have_mit_headers) if(_gss_have_mit_headers) set(GSS_FLAVOUR "MIT") else() # Prevent compiling the header - just check if we can include it list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D__ROKEN_H__") check_include_file("roken.h" _gss_have_roken_h) check_include_file("heimdal/roken.h" _gss_have_heimdal_roken_h) if(_gss_have_roken_h OR _gss_have_heimdal_roken_h) set(GSS_FLAVOUR "Heimdal") endif() endif() cmake_pop_check_state() else() # I am not convinced if this is the right way but this is what autotools do at the moment find_path(_GSS_INCLUDE_DIRS NAMES "gssapi.h" HINTS ${_gss_root_hints} PATH_SUFFIXES "include" "inc" ) if(_GSS_INCLUDE_DIRS) set(GSS_FLAVOUR "Heimdal") else() find_path(_GSS_INCLUDE_DIRS NAMES "gss.h" HINTS ${_gss_root_hints} PATH_SUFFIXES "include" ) if(_GSS_INCLUDE_DIRS) set(GSS_FLAVOUR "GNU") set(GSS_PC_REQUIRES "gss") endif() endif() endif() # If we have headers, check if we can link libraries if(GSS_FLAVOUR) set(_gss_libdir_suffixes "") set(_gss_libdir_hints ${_gss_root_hints}) get_filename_component(_gss_calculated_potential_root "${_GSS_INCLUDE_DIRS}" DIRECTORY) list(APPEND _gss_libdir_hints ${_gss_calculated_potential_root}) if(WIN32) if(CMAKE_SIZEOF_VOID_P EQUAL 8) list(APPEND _gss_libdir_suffixes "lib/AMD64") if(GSS_FLAVOUR STREQUAL "GNU") set(_gss_libname "gss") elseif(GSS_FLAVOUR STREQUAL "MIT") set(_gss_libname "gssapi64") else() set(_gss_libname "libgssapi") endif() else() list(APPEND _gss_libdir_suffixes "lib/i386") if(GSS_FLAVOUR STREQUAL "GNU") set(_gss_libname "gss") elseif(GSS_FLAVOUR STREQUAL "MIT") set(_gss_libname "gssapi32") else() set(_gss_libname "libgssapi") endif() endif() else() list(APPEND _gss_libdir_suffixes "lib;lib64") # those suffixes are not checked for HINTS if(GSS_FLAVOUR STREQUAL "GNU") set(_gss_libname "gss") elseif(GSS_FLAVOUR STREQUAL "MIT") set(_gss_libname "gssapi_krb5") else() set(_gss_libname "gssapi") endif() endif() find_library(_GSS_LIBRARIES NAMES ${_gss_libname} HINTS ${_gss_libdir_hints} PATH_SUFFIXES ${_gss_libdir_suffixes} ) endif() endif() else() # _GSS_MODULE_NAME set since CMake 3.16 if(_GSS_MODULE_NAME STREQUAL _gnu_modname OR _GSS_${_gnu_modname}_VERSION) set(GSS_FLAVOUR "GNU") set(GSS_PC_REQUIRES "gss") if(NOT _GSS_VERSION) # for old CMake versions? set(_GSS_VERSION ${_GSS_${_gnu_modname}_VERSION}) endif() elseif(_GSS_MODULE_NAME STREQUAL _mit_modname OR _GSS_${_mit_modname}_VERSION) set(GSS_FLAVOUR "MIT") set(GSS_PC_REQUIRES "mit-krb5-gssapi") if(NOT _GSS_VERSION) # for old CMake versions? set(_GSS_VERSION ${_GSS_${_mit_modname}_VERSION}) endif() else() set(GSS_FLAVOUR "Heimdal") set(GSS_PC_REQUIRES "heimdal-gssapi") if(NOT _GSS_VERSION) # for old CMake versions? set(_GSS_VERSION ${_GSS_${_heimdal_modname}_VERSION}) endif() endif() message(STATUS "Found GSS/${GSS_FLAVOUR} (via pkg-config): ${_GSS_INCLUDE_DIRS} (found version \"${_GSS_VERSION}\")") endif() string(REPLACE ";" " " _GSS_CFLAGS "${_GSS_CFLAGS}") set(GSS_INCLUDE_DIRS ${_GSS_INCLUDE_DIRS}) set(GSS_LIBRARIES ${_GSS_LIBRARIES}) set(GSS_LIBRARY_DIRS ${_GSS_LIBRARY_DIRS}) set(GSS_CFLAGS ${_GSS_CFLAGS}) set(GSS_VERSION ${_GSS_VERSION}) if(GSS_FLAVOUR) if(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "Heimdal") if(CMAKE_SIZEOF_VOID_P EQUAL 8) set(_heimdal_manifest_file "Heimdal.Application.amd64.manifest") else() set(_heimdal_manifest_file "Heimdal.Application.x86.manifest") endif() if(EXISTS "${GSS_INCLUDE_DIRS}/${_heimdal_manifest_file}") file(STRINGS "${GSS_INCLUDE_DIRS}/${_heimdal_manifest_file}" _heimdal_version_str REGEX "^.*version=\"[0-9]\\.[^\"]+\".*$") string(REGEX MATCH "[0-9]\\.[^\"]+" GSS_VERSION "${_heimdal_version_str}") endif() if(NOT GSS_VERSION) set(GSS_VERSION "Heimdal Unknown") endif() elseif(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "MIT") get_filename_component(_mit_version "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos\\SDK\\CurrentVersion;VersionString]" NAME CACHE) if(WIN32 AND _mit_version) set(GSS_VERSION "${_mit_version}") else() set(GSS_VERSION "MIT Unknown") endif() elseif(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "GNU") if(GSS_INCLUDE_DIRS AND EXISTS "${GSS_INCLUDE_DIRS}/gss.h") set(_version_regex "#[\t ]*define[\t ]+GSS_VERSION[\t ]+\"([^\"]*)\"") file(STRINGS "${GSS_INCLUDE_DIRS}/gss.h" _version_str REGEX "${_version_regex}") string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}") set(GSS_VERSION "${_version_str}") unset(_version_regex) unset(_version_str) endif() endif() endif() include(FindPackageHandleStandardArgs) find_package_handle_standard_args(GSS REQUIRED_VARS GSS_FLAVOUR GSS_LIBRARIES VERSION_VAR GSS_VERSION FAIL_MESSAGE "Could NOT find GSS, try to set the path to GSS root folder in the system variable GSS_ROOT_DIR" ) mark_as_advanced( _GSS_CFLAGS _GSS_FOUND _GSS_INCLUDE_DIRS _GSS_LIBRARIES _GSS_LIBRARY_DIRS _GSS_MODULE_NAME _GSS_PREFIX _GSS_VERSION )
