1#*************************************************************************** 2# _ _ ____ _ 3# Project ___| | | | _ \| | 4# / __| | | | |_) | | 5# | (__| |_| | _ <| |___ 6# \___|\___/|_| \_\_____| 7# 8# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9# 10# This software is licensed as described in the file COPYING, which 11# you should have received as part of this distribution. The terms 12# are also available at https://curl.se/docs/copyright.html. 13# 14# You may opt to use, copy, modify, merge, publish, distribute and/or sell 15# copies of the Software, and permit persons to whom the Software is 16# furnished to do so, under the terms of the COPYING file. 17# 18# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19# KIND, either express or implied. 20# 21# SPDX-License-Identifier: curl 22# 23########################################################################### 24# Find the GSS Kerberos library 25# 26# Input variables: 27# 28# - `GSS_ROOT_DIR`: Set this variable to the root installation of GSS. (also supported as environment) 29# 30# Result variables: 31# 32# - `GSS_FOUND`: System has the Heimdal library. 33# - `GSS_FLAVOUR`: "GNU", "MIT" or "Heimdal" if anything found. 34# - `GSS_INCLUDE_DIRS`: The GSS include directories. 35# - `GSS_LIBRARIES`: The GSS library names. 36# - `GSS_LIBRARY_DIRS`: The GSS library directories. 37# - `GSS_PC_REQUIRES`: The GSS pkg-config packages. 38# - `GSS_CFLAGS`: Required compiler flags. 39# - `GSS_VERSION`: This is set to version advertised by pkg-config or read from manifest. 40# In case the library is found but no version info available it is set to "unknown" 41 42set(_gnu_modname "gss") 43set(_mit_modname "mit-krb5-gssapi") 44set(_heimdal_modname "heimdal-gssapi") 45 46include(CheckIncludeFile) 47include(CheckIncludeFiles) 48include(CheckTypeSize) 49 50set(_gss_root_hints 51 "${GSS_ROOT_DIR}" 52 "$ENV{GSS_ROOT_DIR}" 53) 54 55# Try to find library using system pkg-config if user did not specify root dir 56if(NOT GSS_ROOT_DIR AND NOT "$ENV{GSS_ROOT_DIR}") 57 if(CURL_USE_PKGCONFIG) 58 find_package(PkgConfig QUIET) 59 pkg_search_module(_GSS ${_gnu_modname} ${_mit_modname} ${_heimdal_modname}) 60 list(APPEND _gss_root_hints "${_GSS_PREFIX}") 61 endif() 62 if(WIN32) 63 list(APPEND _gss_root_hints "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos;InstallDir]") 64 endif() 65endif() 66 67if(NOT _GSS_FOUND) # Not found by pkg-config. Let us take more traditional approach. 68 find_file(_gss_configure_script 69 NAMES 70 "krb5-config" 71 HINTS 72 ${_gss_root_hints} 73 PATH_SUFFIXES 74 "bin" 75 NO_CMAKE_PATH 76 NO_CMAKE_ENVIRONMENT_PATH 77 ) 78 79 # If not found in user-supplied directories, maybe system knows better 80 find_file(_gss_configure_script 81 NAMES 82 "krb5-config" 83 PATH_SUFFIXES 84 "bin" 85 ) 86 87 if(_gss_configure_script) 88 execute_process( 89 COMMAND ${_gss_configure_script} "--cflags" "gssapi" 90 OUTPUT_VARIABLE _GSS_CFLAGS 91 RESULT_VARIABLE _gss_configure_failed 92 OUTPUT_STRIP_TRAILING_WHITESPACE 93 ) 94 message(STATUS "FindGSS krb5-config --cflags: ${_GSS_CFLAGS}") 95 if(NOT _gss_configure_failed) # 0 means success 96 # Should also work in an odd case when multiple directories are given 97 string(STRIP "${_GSS_CFLAGS}" _GSS_CFLAGS) 98 string(REGEX REPLACE " +-I" ";" _GSS_CFLAGS "${_GSS_CFLAGS}") 99 string(REGEX REPLACE " +-([^I][^ \\t;]*)" ";-\\1" _GSS_CFLAGS "${_GSS_CFLAGS}") 100 101 foreach(_flag IN LISTS _GSS_CFLAGS) 102 if(_flag MATCHES "^-I.*") 103 string(REGEX REPLACE "^-I" "" _val "${_flag}") 104 list(APPEND _GSS_INCLUDE_DIRS "${_val}") 105 else() 106 list(APPEND _GSS_CFLAGS "${_flag}") 107 endif() 108 endforeach() 109 endif() 110 111 execute_process( 112 COMMAND ${_gss_configure_script} "--libs" "gssapi" 113 OUTPUT_VARIABLE _gss_lib_flags 114 RESULT_VARIABLE _gss_configure_failed 115 OUTPUT_STRIP_TRAILING_WHITESPACE 116 ) 117 message(STATUS "FindGSS krb5-config --libs: ${_gss_lib_flags}") 118 119 if(NOT _gss_configure_failed) # 0 means success 120 # This script gives us libraries and link directories. Blah. We have to deal with it. 121 string(STRIP "${_gss_lib_flags}" _gss_lib_flags) 122 string(REGEX REPLACE " +-(L|l)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}") 123 string(REGEX REPLACE " +-([^Ll][^ \\t;]*)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}") 124 125 foreach(_flag IN LISTS _gss_lib_flags) 126 if(_flag MATCHES "^-l.*") 127 string(REGEX REPLACE "^-l" "" _val "${_flag}") 128 list(APPEND _GSS_LIBRARIES "${_val}") 129 elseif(_flag MATCHES "^-L.*") 130 string(REGEX REPLACE "^-L" "" _val "${_flag}") 131 list(APPEND _GSS_LIBRARY_DIRS "${_val}") 132 endif() 133 endforeach() 134 endif() 135 136 execute_process( 137 COMMAND ${_gss_configure_script} "--version" 138 OUTPUT_VARIABLE _GSS_VERSION 139 RESULT_VARIABLE _gss_configure_failed 140 OUTPUT_STRIP_TRAILING_WHITESPACE 141 ) 142 143 # Older versions may not have the "--version" parameter. In this case we just do not care. 144 if(_gss_configure_failed) 145 set(_GSS_VERSION 0) 146 endif() 147 148 execute_process( 149 COMMAND ${_gss_configure_script} "--vendor" 150 OUTPUT_VARIABLE _gss_vendor 151 RESULT_VARIABLE _gss_configure_failed 152 OUTPUT_STRIP_TRAILING_WHITESPACE 153 ) 154 155 # Older versions may not have the "--vendor" parameter. In this case we just do not care. 156 if(_gss_configure_failed) 157 set(GSS_FLAVOUR "Heimdal") # most probably, should not really matter 158 else() 159 if(_gss_vendor MATCHES ".*H|heimdal.*") 160 set(GSS_FLAVOUR "Heimdal") 161 else() 162 set(GSS_FLAVOUR "MIT") 163 endif() 164 endif() 165 166 else() # Either there is no config script or we are on a platform that does not provide one (Windows?) 167 168 find_path(_GSS_INCLUDE_DIRS NAMES "gssapi/gssapi.h" 169 HINTS 170 ${_gss_root_hints} 171 PATH_SUFFIXES 172 "include" 173 "inc" 174 ) 175 176 if(_GSS_INCLUDE_DIRS) # jay, we have found something 177 cmake_push_check_state() 178 set(CMAKE_REQUIRED_INCLUDES "${_GSS_INCLUDE_DIRS}") 179 check_include_files("gssapi/gssapi_generic.h;gssapi/gssapi_krb5.h" _gss_have_mit_headers) 180 181 if(_gss_have_mit_headers) 182 set(GSS_FLAVOUR "MIT") 183 else() 184 # Prevent compiling the header - just check if we can include it 185 list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D__ROKEN_H__") 186 check_include_file("roken.h" _gss_have_roken_h) 187 188 check_include_file("heimdal/roken.h" _gss_have_heimdal_roken_h) 189 if(_gss_have_roken_h OR _gss_have_heimdal_roken_h) 190 set(GSS_FLAVOUR "Heimdal") 191 endif() 192 endif() 193 cmake_pop_check_state() 194 else() 195 # I am not convinced if this is the right way but this is what autotools do at the moment 196 find_path(_GSS_INCLUDE_DIRS NAMES "gssapi.h" 197 HINTS 198 ${_gss_root_hints} 199 PATH_SUFFIXES 200 "include" 201 "inc" 202 ) 203 204 if(_GSS_INCLUDE_DIRS) 205 set(GSS_FLAVOUR "Heimdal") 206 else() 207 find_path(_GSS_INCLUDE_DIRS NAMES "gss.h" 208 HINTS 209 ${_gss_root_hints} 210 PATH_SUFFIXES 211 "include" 212 ) 213 214 if(_GSS_INCLUDE_DIRS) 215 set(GSS_FLAVOUR "GNU") 216 set(GSS_PC_REQUIRES "gss") 217 endif() 218 endif() 219 endif() 220 221 # If we have headers, check if we can link libraries 222 if(GSS_FLAVOUR) 223 set(_gss_libdir_suffixes "") 224 set(_gss_libdir_hints ${_gss_root_hints}) 225 get_filename_component(_gss_calculated_potential_root "${_GSS_INCLUDE_DIRS}" DIRECTORY) 226 list(APPEND _gss_libdir_hints ${_gss_calculated_potential_root}) 227 228 if(WIN32) 229 if(CMAKE_SIZEOF_VOID_P EQUAL 8) 230 list(APPEND _gss_libdir_suffixes "lib/AMD64") 231 if(GSS_FLAVOUR STREQUAL "GNU") 232 set(_gss_libname "gss") 233 elseif(GSS_FLAVOUR STREQUAL "MIT") 234 set(_gss_libname "gssapi64") 235 else() 236 set(_gss_libname "libgssapi") 237 endif() 238 else() 239 list(APPEND _gss_libdir_suffixes "lib/i386") 240 if(GSS_FLAVOUR STREQUAL "GNU") 241 set(_gss_libname "gss") 242 elseif(GSS_FLAVOUR STREQUAL "MIT") 243 set(_gss_libname "gssapi32") 244 else() 245 set(_gss_libname "libgssapi") 246 endif() 247 endif() 248 else() 249 list(APPEND _gss_libdir_suffixes "lib;lib64") # those suffixes are not checked for HINTS 250 if(GSS_FLAVOUR STREQUAL "GNU") 251 set(_gss_libname "gss") 252 elseif(GSS_FLAVOUR STREQUAL "MIT") 253 set(_gss_libname "gssapi_krb5") 254 else() 255 set(_gss_libname "gssapi") 256 endif() 257 endif() 258 259 find_library(_GSS_LIBRARIES NAMES ${_gss_libname} 260 HINTS 261 ${_gss_libdir_hints} 262 PATH_SUFFIXES 263 ${_gss_libdir_suffixes} 264 ) 265 endif() 266 endif() 267else() 268 # _GSS_MODULE_NAME set since CMake 3.16 269 if(_GSS_MODULE_NAME STREQUAL _gnu_modname OR _GSS_${_gnu_modname}_VERSION) 270 set(GSS_FLAVOUR "GNU") 271 set(GSS_PC_REQUIRES "gss") 272 if(NOT _GSS_VERSION) # for old CMake versions? 273 set(_GSS_VERSION ${_GSS_${_gnu_modname}_VERSION}) 274 endif() 275 elseif(_GSS_MODULE_NAME STREQUAL _mit_modname OR _GSS_${_mit_modname}_VERSION) 276 set(GSS_FLAVOUR "MIT") 277 set(GSS_PC_REQUIRES "mit-krb5-gssapi") 278 if(NOT _GSS_VERSION) # for old CMake versions? 279 set(_GSS_VERSION ${_GSS_${_mit_modname}_VERSION}) 280 endif() 281 else() 282 set(GSS_FLAVOUR "Heimdal") 283 set(GSS_PC_REQUIRES "heimdal-gssapi") 284 if(NOT _GSS_VERSION) # for old CMake versions? 285 set(_GSS_VERSION ${_GSS_${_heimdal_modname}_VERSION}) 286 endif() 287 endif() 288 message(STATUS "Found GSS/${GSS_FLAVOUR} (via pkg-config): ${_GSS_INCLUDE_DIRS} (found version \"${_GSS_VERSION}\")") 289endif() 290 291string(REPLACE ";" " " _GSS_CFLAGS "${_GSS_CFLAGS}") 292 293set(GSS_INCLUDE_DIRS ${_GSS_INCLUDE_DIRS}) 294set(GSS_LIBRARIES ${_GSS_LIBRARIES}) 295set(GSS_LIBRARY_DIRS ${_GSS_LIBRARY_DIRS}) 296set(GSS_CFLAGS ${_GSS_CFLAGS}) 297set(GSS_VERSION ${_GSS_VERSION}) 298 299if(GSS_FLAVOUR) 300 if(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "Heimdal") 301 if(CMAKE_SIZEOF_VOID_P EQUAL 8) 302 set(_heimdal_manifest_file "Heimdal.Application.amd64.manifest") 303 else() 304 set(_heimdal_manifest_file "Heimdal.Application.x86.manifest") 305 endif() 306 307 if(EXISTS "${GSS_INCLUDE_DIRS}/${_heimdal_manifest_file}") 308 file(STRINGS "${GSS_INCLUDE_DIRS}/${_heimdal_manifest_file}" _heimdal_version_str 309 REGEX "^.*version=\"[0-9]\\.[^\"]+\".*$") 310 311 string(REGEX MATCH "[0-9]\\.[^\"]+" GSS_VERSION "${_heimdal_version_str}") 312 endif() 313 314 if(NOT GSS_VERSION) 315 set(GSS_VERSION "Heimdal Unknown") 316 endif() 317 elseif(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "MIT") 318 get_filename_component(_mit_version "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos\\SDK\\CurrentVersion;VersionString]" NAME 319 CACHE) 320 if(WIN32 AND _mit_version) 321 set(GSS_VERSION "${_mit_version}") 322 else() 323 set(GSS_VERSION "MIT Unknown") 324 endif() 325 elseif(NOT GSS_VERSION AND GSS_FLAVOUR STREQUAL "GNU") 326 if(GSS_INCLUDE_DIRS AND EXISTS "${GSS_INCLUDE_DIRS}/gss.h") 327 set(_version_regex "#[\t ]*define[\t ]+GSS_VERSION[\t ]+\"([^\"]*)\"") 328 file(STRINGS "${GSS_INCLUDE_DIRS}/gss.h" _version_str REGEX "${_version_regex}") 329 string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}") 330 set(GSS_VERSION "${_version_str}") 331 unset(_version_regex) 332 unset(_version_str) 333 endif() 334 endif() 335endif() 336 337include(FindPackageHandleStandardArgs) 338find_package_handle_standard_args(GSS 339 REQUIRED_VARS 340 GSS_FLAVOUR 341 GSS_LIBRARIES 342 VERSION_VAR 343 GSS_VERSION 344 FAIL_MESSAGE 345 "Could NOT find GSS, try to set the path to GSS root folder in the system variable GSS_ROOT_DIR" 346) 347 348mark_as_advanced( 349 _GSS_CFLAGS 350 _GSS_FOUND 351 _GSS_INCLUDE_DIRS 352 _GSS_LIBRARIES 353 _GSS_LIBRARY_DIRS 354 _GSS_MODULE_NAME 355 _GSS_PREFIX 356 _GSS_VERSION 357) 358
