# - Try to find GSSAPI

# Once done this will define

#

#  KRB5_CONFIG - Path to krb5-config

#  GSSAPI_ROOT_DIR - Set this variable to the root installation of GSSAPI

#

# Read-Only variables:

#  GSSAPI_FLAVOR_MIT - set to TURE if MIT Kerberos has been found

#  GSSAPI_FLAVOR_HEIMDAL - set to TRUE if Heimdal Keberos has been found

#  GSSAPI_FOUND - system has GSSAPI

#  GSSAPI_INCLUDE_DIR - the GSSAPI include directory

#  GSSAPI_LIBRARIES - Link these to use GSSAPI

#  GSSAPI_DEFINITIONS - Compiler switches required for using GSSAPI

#

#=============================================================================

#  Copyright (c) 2013 Andreas Schneider <asn@cryptomilk.org>

#

#  Distributed under the OSI-approved BSD License (the "License");

#  see accompanying file Copyright.txt for details.

#

#  This software is distributed WITHOUT ANY WARRANTY; without even the

#  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

#  See the License for more information.

#=============================================================================

#

find_path(GSSAPI_ROOT_DIR

    NAMES

        include/gssapi.h

        include/gssapi/gssapi.h

    HINTS

        ${_GSSAPI_ROOT_HINTS}

    PATHS

        ${_GSSAPI_ROOT_PATHS}

)

mark_as_advanced(GSSAPI_ROOT_DIR)

if (UNIX)

    find_program(KRB5_CONFIG

        NAMES

            krb5-config

        PATHS

            ${GSSAPI_ROOT_DIR}/bin

            /opt/local/bin)

    mark_as_advanced(KRB5_CONFIG)

    if (KRB5_CONFIG)

        # Check if we have MIT KRB5

        execute_process(

            COMMAND

                ${KRB5_CONFIG} --vendor

            RESULT_VARIABLE

                _GSSAPI_VENDOR_RESULT

            OUTPUT_VARIABLE

                _GSSAPI_VENDOR_STRING)

        if (_GSSAPI_VENDOR_STRING MATCHES ".*Massachusetts.*")

            set(GSSAPI_FLAVOR_MIT TRUE)

        else()

            execute_process(

                COMMAND

                    ${KRB5_CONFIG} --libs gssapi

                RESULT_VARIABLE

                    _GSSAPI_LIBS_RESULT

                OUTPUT_VARIABLE

                    _GSSAPI_LIBS_STRING)

            if (_GSSAPI_LIBS_STRING MATCHES ".*roken.*")

                set(GSSAPI_FLAVOR_HEIMDAL TRUE)

            endif()

        endif()

        # Get the include dir

        execute_process(

            COMMAND

                ${KRB5_CONFIG} --cflags gssapi

            RESULT_VARIABLE

                _GSSAPI_INCLUDE_RESULT

            OUTPUT_VARIABLE

                _GSSAPI_INCLUDE_STRING)

        string(REGEX REPLACE "(\r?\n)+$" "" _GSSAPI_INCLUDE_STRING "${_GSSAPI_INCLUDE_STRING}")

        string(REGEX REPLACE " *-I" "" _GSSAPI_INCLUDEDIR "${_GSSAPI_INCLUDE_STRING}")

    endif()

    if (NOT GSSAPI_FLAVOR_MIT AND NOT GSSAPI_FLAVOR_HEIMDAL)

        # Check for HEIMDAL

        find_package(PkgConfig)

        if (PKG_CONFIG_FOUND)

            pkg_check_modules(_GSSAPI heimdal-gssapi)

        endif (PKG_CONFIG_FOUND)

        if (_GSSAPI_FOUND)

            set(GSSAPI_FLAVOR_HEIMDAL TRUE)

        else()

            find_path(_GSSAPI_ROKEN

                NAMES

                    roken.h

                PATHS

                    ${GSSAPI_ROOT_DIR}/include

                    ${_GSSAPI_INCLUDEDIR})

            if (_GSSAPI_ROKEN)

                set(GSSAPI_FLAVOR_HEIMDAL TRUE)

            endif()

        endif ()

    endif()

endif (UNIX)

find_path(GSSAPI_INCLUDE_DIR

    NAMES

        gssapi.h

        gssapi/gssapi.h

    PATHS

        ${GSSAPI_ROOT_DIR}/include

        ${_GSSAPI_INCLUDEDIR}

)

if (GSSAPI_FLAVOR_MIT)

    find_library(GSSAPI_LIBRARY

        NAMES

            gssapi_krb5

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(KRB5_LIBRARY

        NAMES

            krb5

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(K5CRYPTO_LIBRARY

        NAMES

            k5crypto

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(COM_ERR_LIBRARY

        NAMES

            com_err

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    if (GSSAPI_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${GSSAPI_LIBRARY}

        )

    endif (GSSAPI_LIBRARY)

    if (KRB5_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${KRB5_LIBRARY}

        )

    endif (KRB5_LIBRARY)

    if (K5CRYPTO_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${K5CRYPTO_LIBRARY}

        )

    endif (K5CRYPTO_LIBRARY)

    if (COM_ERR_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${COM_ERR_LIBRARY}

        )

    endif (COM_ERR_LIBRARY)

endif (GSSAPI_FLAVOR_MIT)

if (GSSAPI_FLAVOR_HEIMDAL)

    find_library(GSSAPI_LIBRARY

        NAMES

            gssapi

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(KRB5_LIBRARY

        NAMES

            krb5

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(HCRYPTO_LIBRARY

        NAMES

            hcrypto

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(COM_ERR_LIBRARY

        NAMES

            com_err

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(HEIMNTLM_LIBRARY

        NAMES

            heimntlm

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(HX509_LIBRARY

        NAMES

            hx509

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(ASN1_LIBRARY

        NAMES

            asn1

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(WIND_LIBRARY

        NAMES

            wind

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    find_library(ROKEN_LIBRARY

        NAMES

            roken

        PATHS

            ${GSSAPI_ROOT_DIR}/lib

            ${_GSSAPI_LIBDIR}

    )

    if (GSSAPI_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${GSSAPI_LIBRARY}

        )

    endif (GSSAPI_LIBRARY)

    if (KRB5_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${KRB5_LIBRARY}

        )

    endif (KRB5_LIBRARY)

    if (HCRYPTO_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${HCRYPTO_LIBRARY}

        )

    endif (HCRYPTO_LIBRARY)

    if (COM_ERR_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${COM_ERR_LIBRARY}

        )

    endif (COM_ERR_LIBRARY)

    if (HEIMNTLM_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${HEIMNTLM_LIBRARY}

        )

    endif (HEIMNTLM_LIBRARY)

    if (HX509_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${HX509_LIBRARY}

        )

    endif (HX509_LIBRARY)

    if (ASN1_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${ASN1_LIBRARY}

        )

    endif (ASN1_LIBRARY)

    if (WIND_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${WIND_LIBRARY}

        )

    endif (WIND_LIBRARY)

    if (ROKEN_LIBRARY)

        set(GSSAPI_LIBRARIES

            ${GSSAPI_LIBRARIES}

            ${WIND_LIBRARY}

        )

    endif (ROKEN_LIBRARY)

endif (GSSAPI_FLAVOR_HEIMDAL)

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(GSSAPI DEFAULT_MSG GSSAPI_LIBRARIES GSSAPI_INCLUDE_DIR)

if (GSSAPI_INCLUDE_DIRS AND GSSAPI_LIBRARIES)

    set(GSSAPI_FOUND TRUE)

endif (GSSAPI_INCLUDE_DIRS AND GSSAPI_LIBRARIES)

# show the GSSAPI_INCLUDE_DIRS and GSSAPI_LIBRARIES variables only in the advanced view

mark_as_advanced(GSSAPI_INCLUDE_DIRS GSSAPI_LIBRARIES)