diff options
Diffstat (limited to 'cmake/FindKRB5.cmake')
| -rw-r--r-- | cmake/FindKRB5.cmake | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/cmake/FindKRB5.cmake b/cmake/FindKRB5.cmake new file mode 100644 index 0000000..9792704 --- /dev/null +++ b/cmake/FindKRB5.cmake @@ -0,0 +1,221 @@ +# - Try to find the Kerberos libraries +# Once done this will define +# +# KRB5_ROOT_CONFIG - Set this variable to the full path of krb5-config of Kerberos +# KRB5_ROOT_FLAVOUR - Set this variable to the flavour of Kerberos installation (MIT or Heimdal) +# +# Read-Only variables: +# KRB5_FOUND - system has the Heimdal library +# KRB5_FLAVOUR - "MIT" or "Heimdal" if anything found. +# KRB5_INCLUDE_DIRS - the Heimdal include directory +# KRB5_LIBRARIES - The libraries needed to use Kerberos +# KRB5_LIBRARY_DIRS - Directories to add to linker search path +# KRB5_LDFLAGS - Additional linker flags +# KRB5_CFLAGS - Additional compiler flags +# KRB5_VERSION - This is set to version advertised by pkg-config or read from manifest. +# In case the library is found but no version info availabe it'll be set to "unknown" + +include(CheckIncludeFile) +include(CheckIncludeFiles) +include(CheckTypeSize) + +set(_KRB5_REQUIRED_VARS + KRB5_FOUND + KRB5_VERSION + KRB5_FLAVOUR + KRB5_INCLUDE_DIRS + KRB5_LIBRARIES) + +macro(PROVIDES_KRB5) + set(PREFIX "MACRO_KRB5") + + cmake_parse_arguments( + "${PREFIX}" + "" + "NAME" + "" + ${ARGN}) + + set(KRB5_FLAVOUR ${MACRO_KRB5_NAME}) + string(TOUPPER "${MACRO_KRB5_NAME}" MACRO_KRB5_NAME) + + # This is a list of all variables that pkg_check_modules exports. + set(VARIABLES "CFLAGS;CFLAGS_I;CFLAGS_OTHER;FOUND;INCLUDEDIR;INCLUDE_DIRS;LDFLAGS;LDFLAGS_OTHER;LIBDIR;LIBRARIES;LIBRARY_DIRS;LIBS;LIBS_L;LIBS_OTHER;LIBS_PATHS;LINK_LIBRARIS;MODULE_NAME;PREFIX;VERSION;STATIC_CFLAGS;STATIC_CFLAGS_I;STATIC_CFLAGS_OTHER;STATIC_INCLUDE_DIRS;STATIC_LDFLAGS;STATIC_LDFLAGS_OTHER;STATIC_LIBDIR;STATIC_LIBRARIES;STATIC_LIBRARY_DIRS;STATIC_LIBS;STATIC_LIBS_L;STATIC_LIBS_OTHER;STATIC_LIBS_PATHS") + foreach(VAR ${VARIABLES}) + set(KRB5_${VAR} ${KRB5_${MACRO_KRB5_NAME}_${VAR}}) + endforeach() + + # Bugfix for older installations: + # KRB5_INCLUDE_DIRS might not be set, fall back to KRB5_INCLUDEDIR + if (NOT KRB5_INCLUDE_DIRS) + set(KRB5_INCLUDE_DIRS ${KRB5_INCLUDEDIR}) + endif() +endmacro() + +function(GET_KRB5_CONFIG KRB5_CONFIG COMMAND RESULT) + execute_process( + COMMAND ${KRB5_CONFIG} ${COMMAND} + OUTPUT_VARIABLE _KRB5_RESULT + RESULT_VARIABLE _KRB5_CONFIGURE_FAILED + ) + if (_KRB5_CONFIGURE_FAILED) + message(FATAL_ERROR "Failed to detect krb5-config [${COMMAND}]") + endif() + + string(REGEX REPLACE "[\r\n]" "" _KRB5_RESULT ${_KRB5_RESULT}) + set(${RESULT} "${_KRB5_RESULT}" PARENT_SCOPE) +endfunction() + +function(string_starts_with str search RES) + string(FIND "${str}" "${search}" out) + if("${out}" EQUAL 0) + set(${RES} ON PARENT_SCOPE) + else() + set(${RES} OFF PARENT_SCOPE) + endif() +endfunction() + +function(GET_KRB5_BY_CONFIG KRB5_CONFIG) + if (NOT KRB5_CONFIG) + find_file(KRB5_CONFIG + NAMES + "krb5-config" + "krb5-config.mit" + "krb5-config.heimdal" + PATH_SUFFIXES + bin + NO_CMAKE_PATH + NO_CMAKE_ENVIRONMENT_PATH + REQUIRED + ) + message("autodetected krb5-config at ${KRB5_CONFIG}") + else() + message("using krb5-config ${KRB5_CONFIG} provided by KRB5_ROOT_CONFIG") + endif() + + GET_KRB5_CONFIG("${KRB5_CONFIG}" "--vendor" _KRB5_VENDOR) + + if ("${_KRB5_VENDOR}" STREQUAL "Apple MITKerberosShim") + message(FATAL_ERROR "Apple MITKerberosShim is deprecated and not supported") + elseif ("${_KRB5_VENDOR}" STREQUAL "Massachusetts Institute of Technology") + set(KRB5_FLAVOUR "MIT") + else() + set(KRB5_FLAVOUR "${_KRB5_VENDOR}") + endif() + + GET_KRB5_CONFIG("${KRB5_CONFIG}" "--cflags" KRB5_CFLAGS) + GET_KRB5_CONFIG("${KRB5_CONFIG}" "--version" KRB5_VERSION_RAW) + + string(REGEX REPLACE "[ ]" ";" KRB5_VERSION_LIST "${KRB5_VERSION_RAW}") + list(LENGTH KRB5_VERSION_LIST KRB5_VERSION_LIST_LEN) + math(EXPR KRB5_VERSION_LIST_LAST "${KRB5_VERSION_LIST_LEN} - 1") + list(GET KRB5_VERSION_LIST ${KRB5_VERSION_LIST_LAST} KRB5_VERSION) + + if (KRB5_FLAVOUR STREQUAL "MIT") + if (KRB5_VERSION VERSION_LESS "1.14") + message(FATAL_ERROR "MIT kerberos ${KRB5_VERSION} < 1.14 is not supported, upgrade the library!") + endif() + endif() + + GET_KRB5_CONFIG("${KRB5_CONFIG}" "--libs" KRB5_LDFLAGS) + + string(REGEX REPLACE "[ ]" ";" KRB5_CFLAG_LIST "${KRB5_CFLAGS}") + foreach(FLAG ${KRB5_CFLAG_LIST}) + string_starts_with("${FLAG}" "-I" RES) + if (RES) + string(SUBSTRING "${FLAG}" 2 -1 FLAG) + endif() + + if (IS_DIRECTORY "${FLAG}") + list(APPEND KRB5_INCLUDEDIR ${FLAG}) + endif() + endforeach() + if (NOT KRB5_INCLUDEDIR) + find_file(KRB5_INCLUDEDIR_HEADER + NAMES krb5.h + REQUIRED + ) + get_filename_component(KRB5_INCLUDEDIR "${KRB5_INCLUDEDIR_HEADER}" DIRECTORY) + endif() + + string(REGEX REPLACE "[ ]" ";" KRB5_LDFLAG_LIST "${KRB5_LDFLAGS}") + foreach(FLAG ${KRB5_LDFLAG_LIST}) + string_starts_with("${FLAG}" "-L" RES) + if (RES) + string(SUBSTRING "${FLAG}" 2 -1 SUBFLAG) + list(APPEND KRB5_LIBRARY_DIRS ${SUBFLAG}) + endif() + string_starts_with("${FLAG}" "-l" RES) + if (RES) + string(SUBSTRING "${FLAG}" 2 -1 SUBFLAG) + list(APPEND KRB5_LIBRARIES ${SUBFLAG}) + endif() + endforeach() + + set(KRB5_FOUND ON PARENT_SCOPE) + set(KRB5_VERSION ${KRB5_VERSION} PARENT_SCOPE) + set(KRB5_FLAVOUR ${KRB5_FLAVOUR} PARENT_SCOPE) + set(KRB5_CFLAGS ${KRB5_CFLAGS} PARENT_SCOPE) + set(KRB5_LDFLAGS ${KRB5_LDFLAGS} PARENT_SCOPE) + set(KRB5_INCLUDEDIR ${KRB5_INCLUDEDIR} PARENT_SCOPE) + set(KRB5_INCLUDE_DIRS ${KRB5_INCLUDEDIR} PARENT_SCOPE) + set(KRB5_LIBRARIES ${KRB5_LIBRARIES} PARENT_SCOPE) + set(KRB5_LIBRARY_DIRS ${KRB5_LIBRARY_DIRS} PARENT_SCOPE) +endfunction() + +# try to find kerberos to compile against. +# +# * First search with pkg-config (prefer MIT over Heimdal) +# * Then try to find krb5-config (generic, krb5-config.mit and last krb5-config.heimdal) +find_package(PkgConfig REQUIRED) + +if (KRB5_ROOT_CONFIG) + +elseif (KRB5_ROOT_FLAVOUR) + if (KRB5_ROOT_FLAVOUR STREQUAL "Heimdal") + pkg_check_modules(KRB5_HEIMDAL heimdal-krb5) + elseif (KRB5_ROOT_FLAVOUR STREQUAL "MIT") + pkg_check_modules(KRB5_HEIMDAL mit-krb5) + else() + message(FATAL_ERROR "Invalid KRB5_ROOT_FLAVOUR=${KRB5_ROOT_FLAVOUR}, only 'MIT' or 'Heimdal' are supported") + endif() +else() + pkg_check_modules(KRB5_MIT mit-krb5) + pkg_check_modules(KRB5_HEIMDAL heimdal-krb5) +endif() + +if (KRB5_MIT_FOUND) + PROVIDES_KRB5(NAME "MIT") + if (KRB5_VERSION VERSION_LESS "1.14") + message(FATAL_ERROR "MIT kerberos < 1.14 is not supported, upgrade the library!") + endif() +elseif(KRB5_HEIMDAL_FOUND) + PROVIDES_KRB5(NAME "Heimdal") +elseif(KRB5_ANY_FOUND) + GET_KRB5_VENDOR(ANY_VENDOR) + PROVIDES_KRB5(NAME "${ANY_VENDOR}") +else() + GET_KRB5_BY_CONFIG(${KRB5_ROOT_CONFIG}) +endif() + +#message("using KRB5_FOUND ${KRB5_FOUND} ") +#message("using KRB5_VERSION ${KRB5_VERSION} ") +#message("using KRB5_FLAVOUR ${KRB5_FLAVOUR} ") +#message("using KRB5_CFLAGS ${KRB5_CFLAGS} ") +#message("using KRB5_LDFLAGS ${KRB5_LDFLAGS} ") +#message("using KRB5_INCLUDEDIR ${KRB5_INCLUDEDIR} ") +#message("using KRB5_INCLUDE_DIRS ${KRB5_INCLUDEDIR} ") +#message("using KRB5_LIBRARIES ${KRB5_LIBRARIES} ") + +include(FindPackageHandleStandardArgs) + +find_package_handle_standard_args(KRB5 + REQUIRED_VARS + ${_KRB5_REQUIRED_VARS} + VERSION_VAR + KRB5_VERSION + FAIL_MESSAGE + "Could NOT find Kerberos, try to set the CMake variable KRB5_ROOT_CONFIG to the full path of krb5-config" +) + +mark_as_advanced(${_KRB5_REQUIRED_VARS}) |