source/auth/kerberos/kerberos.m4

   1 #################################################
   2 # KRB5 support
   3 KRB5_CFLAGS=""
   4 KRB5_CPPFLAGS=""
   5 KRB5_LDFLAGS=""
   6 KRB5_LIBS=""
   7 with_krb5_support=auto
   8 krb5_withval=auto
   9 AC_MSG_CHECKING([for KRB5 support])
  10
  11 # Do no harm to the values of CFLAGS and LIBS while testing for
  12 # Kerberos support.
  13 AC_ARG_WITH(krb5,
  14 [  --with-krb5=base-dir    Locate Kerberos 5 support (default=auto)],
  15         [ case "$withval" in
  16                 no)
  17                         with_krb5_support=no
  18                         AC_MSG_RESULT(no)
  19                         krb5_withval=no
  20                         ;;
  21                 yes)
  22                         with_krb5_support=yes
  23                         AC_MSG_RESULT(yes)
  24                         krb5_withval=yes
  25                         ;;
  26                 auto)
  27                         with_krb5_support=auto
  28                         AC_MSG_RESULT(auto)
  29                         krb5_withval=auto
  30                         ;;
  31                 *)
  32                         with_krb5_support=yes
  33                         AC_MSG_RESULT(yes)
  34                         krb5_withval=$withval
  35                         KRB5CONFIG="$krb5_withval/bin/krb5-config"
  36                         ;;
  37         esac ],
  38         AC_MSG_RESULT($with_krb5_support)
  39 )
  40
  41 if test x$with_krb5_support != x"no"; then
  42         FOUND_KRB5=no
  43         FOUND_KRB5_VIA_CONFIG=no
  44
  45         #################################################
  46         # check for krb5-config from recent MIT and Heimdal kerberos 5
  47         AC_MSG_CHECKING(for working specified location for krb5-config)
  48         if test x$KRB5CONFIG != "x"; then
  49                 if test -x "$KRB5CONFIG"; then
  50                         ac_save_CFLAGS=$CFLAGS
  51                         CFLAGS="";export CFLAGS
  52                         ac_save_LDFLAGS=$LDFLAGS
  53                         LDFLAGS="";export LDFLAGS
  54                         KRB5_LIBS="`$KRB5CONFIG --libs gssapi`"
  55                         KRB5_CFLAGS="`$KRB5CONFIG --cflags | sed s/@INCLUDE_des@//`"
  56                         KRB5_CPPFLAGS="`$KRB5CONFIG --cflags | sed s/@INCLUDE_des@//`"
  57                         CFLAGS=$ac_save_CFLAGS;export CFLAGS
  58                         LDFLAGS=$ac_save_LDFLAGS;export LDFLAGS
  59                         FOUND_KRB5=yes
  60                         FOUND_KRB5_VIA_CONFIG=yes
  61                         AC_MSG_RESULT(yes. Found $KRB5CONFIG)
  62                 else
  63                         AC_MSG_RESULT(no. Fallback to specified directory)
  64                 fi
  65         else
  66                 AC_MSG_RESULT(no. Fallback to finding krb5-config in path)
  67                 #################################################
  68                 # check for krb5-config from recent MIT and Heimdal kerberos 5
  69                 AC_PATH_PROG(KRB5CONFIG, krb5-config)
  70                 AC_MSG_CHECKING(for working krb5-config in path)
  71                 if test -x "$KRB5CONFIG"; then
  72                         ac_save_CFLAGS=$CFLAGS
  73                         CFLAGS="";export CFLAGS
  74                         ac_save_LDFLAGS=$LDFLAGS
  75                         LDFLAGS="";export LDFLAGS
  76                         KRB5_LIBS="`$KRB5CONFIG --libs gssapi`"
  77                         KRB5_CFLAGS="`$KRB5CONFIG --cflags | sed s/@INCLUDE_des@//`"
  78                         KRB5_CPPFLAGS="`$KRB5CONFIG --cflags | sed s/@INCLUDE_des@//`"
  79                         CFLAGS=$ac_save_CFLAGS;export CFLAGS
  80                         LDFLAGS=$ac_save_LDFLAGS;export LDFLAGS
  81                         FOUND_KRB5=yes
  82                         FOUND_KRB5_VIA_CONFIG=yes
  83                         AC_MSG_RESULT(yes. Found $KRB5CONFIG)
  84                 else
  85                         AC_MSG_RESULT(no. Fallback to previous krb5 detection strategy)
  86                 fi
  87         fi
  88
  89         if test x$FOUND_KRB5 != x"yes"; then
  90                 #################################################
  91                 # check for location of Kerberos 5 install
  92                 AC_MSG_CHECKING(for kerberos 5 install path)
  93                 case "$krb5_withval" in
  94                         no)
  95                                 AC_MSG_RESULT(no krb5-path given)
  96                                 ;;
  97                         yes)
  98                                 AC_MSG_RESULT(/usr)
  99                                 FOUND_KRB5=yes
 100                                 ;;
 101                         *)
 102                                 AC_MSG_RESULT($krb5_withval)
 103                                 KRB5_CFLAGS="-I$krb5_withval/include"
 104                                 KRB5_CPPFLAGS="-I$krb5_withval/include"
 105                                 KRB5_LDFLAGS="-L$krb5_withval/lib"
 106                                 FOUND_KRB5=yes
 107                                 ;;
 108                 esac
 109         fi
 110
 111         if test x$FOUND_KRB5 != x"yes"; then
 112                 #################################################
 113                 # see if this box has the SuSE location for the heimdal krb implementation
 114                 AC_MSG_CHECKING(for /usr/include/heimdal)
 115                 if test -d /usr/include/heimdal; then
 116                         if test -f /usr/lib/heimdal/lib/libkrb5.a; then
 117                                 KRB5_CFLAGS="-I/usr/include/heimdal"
 118                                 KRB5_CPPFLAGS="-I/usr/include/heimdal"
 119                                 KRB5_LDFLAGS="-L/usr/lib/heimdal/lib"
 120                                 AC_MSG_RESULT(yes)
 121                         else
 122                                 KRB5_CFLAGS="-I/usr/include/heimdal"
 123                                 KRB5_CPPFLAGS="-I/usr/include/heimdal"
 124                                 AC_MSG_RESULT(yes)
 125                         fi
 126                 else
 127                         AC_MSG_RESULT(no)
 128                 fi
 129         fi
 130
 131         if test x$FOUND_KRB5 != x"yes"; then
 132                 #################################################
 133                 # see if this box has the RedHat location for kerberos
 134                 AC_MSG_CHECKING(for /usr/kerberos)
 135                 if test -d /usr/kerberos -a -f /usr/kerberos/lib/libkrb5.a; then
 136                         KRB5_LDFLAGS="-L/usr/kerberos/lib"
 137                         KRB5_CFLAGS="-I/usr/kerberos/include"
 138                         KRB5_CPPFLAGS="-I/usr/kerberos/include"
 139                         AC_MSG_RESULT(yes)
 140                 else
 141                         AC_MSG_RESULT(no)
 142                 fi
 143         fi
 144
 145         ac_save_CFLAGS=$CFLAGS
 146         ac_save_CPPFLAGS=$CPPFLAGS
 147         ac_save_LDFLAGS=$LDFLAGS
 148
 149         #MIT needs this, to let us see 'internal' parts of the headers we use
 150         KRB5_CFLAGS="${KRB5_CFLAGS} -DKRB5_PRIVATE -DKRB5_DEPRECATED"
 151
 152         #Heimdal needs this
 153         #TODO: we need to parse KRB5_LIBS for -L path
 154         #      and set -Wl,-rpath -Wl,path
 155
 156         CFLAGS="$CFLAGS $KRB5_CFLAGS"
 157         CPPFLAGS="$CPPFLAGS $KRB5_CPPFLAGS"
 158         LDFLAGS="$LDFLAGS $KRB5_LDFLAGS"
 159
 160         KRB5_LIBS="$KRB5_LDFLAGS $KRB5_LIBS"
 161
 162         # now check for krb5.h. Some systems have the libraries without the headers!
 163         # note that this check is done here to allow for different kerberos
 164         # include paths
 165         AC_CHECK_HEADERS(krb5.h)
 166
 167         if test x"$ac_cv_header_krb5_h" = x"no"; then
 168                 # Give a warning if KRB5 support was not explicitly requested,
 169                 # i.e with_krb5_support = auto, otherwise die with an error.
 170                 if test x"$with_krb5_support" = x"yes"; then
 171                         AC_MSG_ERROR([KRB5 cannot be supported without krb5.h])
 172                 else
 173                         AC_MSG_WARN([KRB5 cannot be supported without krb5.h])
 174                 fi
 175                 # Turn off AD support and restore CFLAGS and LIBS variables
 176                 with_krb5_support="no"
 177         fi
 178
 179         CFLAGS=$ac_save_CFLAGS
 180         CPPFLAGS=$ac_save_CPPFLAGS
 181         LDFLAGS=$ac_save_LDFLAGS
 182 fi
 183
 184 # Now we have determined whether we really want KRB5 support
 185
 186 if test x"$with_krb5_support" != x"no"; then
 187         ac_save_CFLAGS=$CFLAGS
 188         ac_save_CPPFLAGS=$CPPFLAGS
 189         ac_save_LDFLAGS=$LDFLAGS
 190         ac_save_LIBS=$LIBS
 191
 192         CFLAGS="$CFLAGS $KRB5_CFLAGS"
 193         CPPFLAGS="$CPPFLAGS $KRB5_CPPFLAGS"
 194         LDFLAGS="$LDFLAGS $KRB5_LDFLAGS"
 195
 196         # now check for gssapi headers.  This is also done here to allow for
 197         # different kerberos include paths
 198         AC_CHECK_HEADERS(gssapi.h gssapi_krb5.h gssapi/gssapi.h gssapi/gssapi_generic.h gssapi/gssapi_krb5.h com_err.h)
 199
 200         ##################################################################
 201         # we might need the k5crypto and com_err libraries on some systems
 202         AC_CHECK_LIB_EXT(com_err, KRB5_LIBS, _et_list)
 203         AC_CHECK_LIB_EXT(k5crypto, KRB5_LIBS, krb5_encrypt_data)
 204
 205         # Heimdal checks.
 206         # But only if we didn't have a krb5-config to tell us this already
 207         if test x"$FOUND_KRB5_VIA_CONFIG" != x"yes"; then
 208                 AC_CHECK_LIB_EXT(crypto, KRB5_LIBS, des_set_key)
 209                 AC_CHECK_LIB_EXT(asn1, KRB5_LIBS, copy_Authenticator)
 210                 AC_CHECK_LIB_EXT(roken, KRB5_LIBS, roken_getaddrinfo_hostspec)
 211         fi
 212
 213         # Heimdal checks. On static Heimdal gssapi must be linked before krb5.
 214         AC_CHECK_LIB_EXT(gssapi, KRB5_LIBS, gss_display_status,[],[],
 215                                 AC_DEFINE(HAVE_GSSAPI,1,[Whether GSSAPI is available]))
 216
 217         ########################################################
 218         # now see if we can find the krb5 libs in standard paths
 219         # or as specified above
 220         AC_CHECK_LIB_EXT(krb5, KRB5_LIBS, krb5_mk_req_extended)
 221         AC_CHECK_LIB_EXT(krb5, KRB5_LIBS, krb5_kt_compare)
 222
 223         ########################################################
 224         # now see if we can find the gssapi libs in standard paths
 225         if test x"$ac_cv_lib_ext_gssapi_gss_display_status" != x"yes"; then
 226            AC_CHECK_LIB_EXT(gssapi_krb5, KRB5_LIBS,gss_display_status,[],[],
 227                 AC_DEFINE(HAVE_GSSAPI,1,[Whether GSSAPI is available]))
 228         fi
 229
 230         AC_CHECK_FUNC_EXT(krb5_set_real_time, $KRB5_LIBS)
 231         AC_CHECK_FUNC_EXT(krb5_set_default_in_tkt_etypes, $KRB5_LIBS)
 232         AC_CHECK_FUNC_EXT(krb5_set_default_tgs_ktypes, $KRB5_LIBS)
 233         AC_CHECK_FUNC_EXT(krb5_principal2salt, $KRB5_LIBS)
 234         AC_CHECK_FUNC_EXT(krb5_use_enctype, $KRB5_LIBS)
 235         AC_CHECK_FUNC_EXT(krb5_string_to_key, $KRB5_LIBS)
 236         AC_CHECK_FUNC_EXT(krb5_get_pw_salt, $KRB5_LIBS)
 237         AC_CHECK_FUNC_EXT(krb5_string_to_key_salt, $KRB5_LIBS)
 238         AC_CHECK_FUNC_EXT(krb5_auth_con_setkey, $KRB5_LIBS)
 239         AC_CHECK_FUNC_EXT(krb5_auth_con_setuseruserkey, $KRB5_LIBS)
 240         AC_CHECK_FUNC_EXT(krb5_locate_kdc, $KRB5_LIBS)
 241         AC_CHECK_FUNC_EXT(krb5_get_permitted_enctypes, $KRB5_LIBS)
 242         AC_CHECK_FUNC_EXT(krb5_get_default_in_tkt_etypes, $KRB5_LIBS)
 243         AC_CHECK_FUNC_EXT(krb5_free_ktypes, $KRB5_LIBS)
 244         AC_CHECK_FUNC_EXT(krb5_free_data_contents, $KRB5_LIBS)
 245         AC_CHECK_FUNC_EXT(krb5_principal_get_comp_string, $KRB5_LIBS)
 246         AC_CHECK_FUNC_EXT(krb5_free_unparsed_name, $KRB5_LIBS)
 247         AC_CHECK_FUNC_EXT(krb5_free_keytab_entry_contents, $KRB5_LIBS)
 248         AC_CHECK_FUNC_EXT(krb5_kt_free_entry, $KRB5_LIBS)
 249         AC_CHECK_FUNC_EXT(krb5_krbhst_get_addrinfo, $KRB5_LIBS)
 250         AC_CHECK_FUNC_EXT(krb5_verify_checksum, $KRB5_LIBS)
 251         AC_CHECK_FUNC_EXT(krb5_c_verify_checksum, $KRB5_LIBS)
 252         AC_CHECK_FUNC_EXT(krb5_ticket_get_authorization_data_type, $KRB5_LIBS)
 253         AC_CHECK_FUNC_EXT(krb5_krbhst_get_addrinfo, $KRB5_LIBS)
 254         AC_CHECK_FUNC_EXT(krb5_c_enctype_compare, $KRB5_LIBS)
 255         AC_CHECK_FUNC_EXT(krb5_enctypes_compatible_keys, $KRB5_LIBS)
 256         AC_CHECK_FUNC_EXT(krb5_get_error_string, $KRB5_LIBS)
 257         AC_CHECK_FUNC_EXT(krb5_free_error_string, $KRB5_LIBS)
 258
 259         LIBS="$LIBS $KRB5_LIBS"
 260
 261         AC_CACHE_CHECK([for krb5_encrypt_block type],
 262                 samba_cv_HAVE_KRB5_ENCRYPT_BLOCK,[
 263         AC_TRY_COMPILE([#include <krb5.h>],
 264                 [krb5_encrypt_block block;],
 265                 samba_cv_HAVE_KRB5_ENCRYPT_BLOCK=yes,
 266                 samba_cv_HAVE_KRB5_ENCRYPT_BLOCK=no)])
 267
 268         if test x"$samba_cv_HAVE_KRB5_ENCRYPT_BLOCK" = x"yes"; then
 269                 AC_DEFINE(HAVE_KRB5_ENCRYPT_BLOCK,1,
 270                 [Whether the type krb5_encrypt_block exists])
 271         fi
 272
 273         AC_CACHE_CHECK([for addrtype in krb5_address],
 274                 samba_cv_HAVE_ADDRTYPE_IN_KRB5_ADDRESS,[
 275                 AC_TRY_COMPILE([#include <krb5.h>],
 276                 [krb5_address kaddr; kaddr.addrtype = ADDRTYPE_INET;],
 277                 samba_cv_HAVE_ADDRTYPE_IN_KRB5_ADDRESS=yes,
 278                 samba_cv_HAVE_ADDRTYPE_IN_KRB5_ADDRESS=no)])
 279         if test x"$samba_cv_HAVE_ADDRTYPE_IN_KRB5_ADDRESS" = x"yes"; then
 280                 AC_DEFINE(HAVE_ADDRTYPE_IN_KRB5_ADDRESS,1,
 281                 [Whether the krb5_address struct has a addrtype property])
 282         fi
 283
 284         AC_CACHE_CHECK([for addr_type in krb5_address],
 285                 samba_cv_HAVE_ADDR_TYPE_IN_KRB5_ADDRESS,[
 286                 AC_TRY_COMPILE([#include <krb5.h>],
 287                 [krb5_address kaddr; kaddr.addr_type = KRB5_ADDRESS_INET;],
 288                 samba_cv_HAVE_ADDR_TYPE_IN_KRB5_ADDRESS=yes,
 289                 samba_cv_HAVE_ADDR_TYPE_IN_KRB5_ADDRESS=no)])
 290         if test x"$samba_cv_HAVE_ADDR_TYPE_IN_KRB5_ADDRESS" = x"yes"; then
 291                 AC_DEFINE(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS,1,
 292                 [Whether the krb5_address struct has a addr_type property])
 293         fi
 294
 295         AC_CACHE_CHECK([for enc_part2 in krb5_ticket],
 296                 samba_cv_HAVE_KRB5_TKT_ENC_PART2,[
 297                 AC_TRY_COMPILE([#include <krb5.h>],
 298                 [krb5_ticket tkt; tkt.enc_part2->authorization_data[0]->contents = NULL;],
 299                 samba_cv_HAVE_KRB5_TKT_ENC_PART2=yes,
 300                 samba_cv_HAVE_KRB5_TKT_ENC_PART2=no)])
 301         if test x"$samba_cv_HAVE_KRB5_TKT_ENC_PART2" = x"yes"; then
 302                 AC_DEFINE(HAVE_KRB5_TKT_ENC_PART2,1,
 303                 [Whether the krb5_ticket struct has a enc_part2 property])
 304         fi
 305
 306         AC_CACHE_CHECK([for keyblock in krb5_creds],
 307                  samba_cv_HAVE_KRB5_KEYBLOCK_IN_CREDS,[
 308         AC_TRY_COMPILE([#include <krb5.h>],
 309                 [krb5_creds creds; krb5_keyblock kb; creds.keyblock = kb;],
 310                 samba_cv_HAVE_KRB5_KEYBLOCK_IN_CREDS=yes,
 311                 samba_cv_HAVE_KRB5_KEYBLOCK_IN_CREDS=no)])
 312
 313         if test x"$samba_cv_HAVE_KRB5_KEYBLOCK_IN_CREDS" = x"yes"; then
 314                 AC_DEFINE(HAVE_KRB5_KEYBLOCK_IN_CREDS,1,
 315                 [Whether the krb5_creds struct has a keyblock property])
 316         fi
 317
 318         AC_CACHE_CHECK([for session in krb5_creds],
 319                  samba_cv_HAVE_KRB5_SESSION_IN_CREDS,[
 320         AC_TRY_COMPILE([#include <krb5.h>],
 321                 [krb5_creds creds; krb5_keyblock kb; creds.session = kb;],
 322                 samba_cv_HAVE_KRB5_SESSION_IN_CREDS=yes,
 323                 samba_cv_HAVE_KRB5_SESSION_IN_CREDS=no)])
 324
 325         if test x"$samba_cv_HAVE_KRB5_SESSION_IN_CREDS" = x"yes"; then
 326                 AC_DEFINE(HAVE_KRB5_SESSION_IN_CREDS,1,
 327                 [Whether the krb5_creds struct has a session property])
 328         fi
 329
 330         AC_CACHE_CHECK([for keyvalue in krb5_keyblock],
 331                 samba_cv_HAVE_KRB5_KEYBLOCK_KEYVALUE,[
 332                 AC_TRY_COMPILE([#include <krb5.h>],
 333                 [krb5_keyblock key; key.keyvalue.data = NULL;],
 334                 samba_cv_HAVE_KRB5_KEYBLOCK_KEYVALUE=yes,
 335                 samba_cv_HAVE_KRB5_KEYBLOCK_KEYVALUE=no)])
 336         if test x"$samba_cv_HAVE_KRB5_KEYBLOCK_KEYVALUE" = x"yes"; then
 337                 AC_DEFINE(HAVE_KRB5_KEYBLOCK_KEYVALUE,1,
 338                 [Whether the krb5_keyblock struct has a keyvalue property])
 339         fi
 340
 341         AC_CACHE_CHECK([for ENCTYPE_ARCFOUR_HMAC_MD5],
 342                 samba_cv_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5,[
 343                 AC_TRY_COMPILE([#include <krb5.h>],
 344                 [krb5_enctype enctype; enctype = ENCTYPE_ARCFOUR_HMAC_MD5;],
 345                 samba_cv_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5=yes,
 346                 samba_cv_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5=no)])
 347         AC_CACHE_CHECK([for KEYTYPE_ARCFOUR_56],
 348                  samba_cv_HAVE_KEYTYPE_ARCFOUR_56,[
 349                 AC_TRY_COMPILE([#include <krb5.h>],
 350                 [krb5_keytype keytype; keytype = KEYTYPE_ARCFOUR_56;],
 351                 samba_cv_HAVE_KEYTYPE_ARCFOUR_56=yes,
 352                 samba_cv_HAVE_KEYTYPE_ARCFOUR_56=no)])
 353         # Heimdals with KEYTYPE_ARCFOUR but not KEYTYPE_ARCFOUR_56 are broken
 354         # w.r.t. arcfour and windows, so we must not enable it here
 355         if test x"$samba_cv_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5" = x"yes" -a\
 356            x"$samba_cv_HAVE_KEYTYPE_ARCFOUR_56" = x"yes"; then
 357                 AC_DEFINE(HAVE_ENCTYPE_ARCFOUR_HMAC_MD5,1,
 358                 [Whether the ENCTYPE_ARCFOUR_HMAC_MD5 key type is available])
 359         fi
 360
 361         AC_CACHE_CHECK([for AP_OPTS_USE_SUBKEY],
 362                 samba_cv_HAVE_AP_OPTS_USE_SUBKEY,[
 363                 AC_TRY_COMPILE([#include <krb5.h>],
 364                 [krb5_flags ap_options; ap_options = AP_OPTS_USE_SUBKEY;],
 365                 samba_cv_HAVE_AP_OPTS_USE_SUBKEY=yes,
 366                 samba_cv_HAVE_AP_OPTS_USE_SUBKEY=no)])
 367         if test x"$samba_cv_HAVE_AP_OPTS_USE_SUBKEY" = x"yes"; then
 368                 AC_DEFINE(HAVE_AP_OPTS_USE_SUBKEY,1,
 369                 [Whether the AP_OPTS_USE_SUBKEY ap option is available])
 370         fi
 371
 372         AC_CACHE_CHECK([for KV5M_KEYTAB],
 373                 samba_cv_HAVE_KV5M_KEYTAB,[
 374                 AC_TRY_COMPILE([#include <krb5.h>],
 375                 [krb5_keytab_entry entry; entry.magic = KV5M_KEYTAB;],
 376                 samba_cv_HAVE_KV5M_KEYTAB=yes,
 377                 samba_cv_HAVE_KV5M_KEYTAB=no)])
 378         if test x"$samba_cv_HAVE_KV5M_KEYTAB" = x"yes"; then
 379                 AC_DEFINE(HAVE_KV5M_KEYTAB,1,
 380                 [Whether the KV5M_KEYTAB option is available])
 381         fi
 382
 383         AC_CACHE_CHECK([for the krb5_princ_component macro],
 384                 samba_cv_HAVE_KRB5_PRINC_COMPONENT,[
 385                 AC_TRY_LINK([#include <krb5.h>],
 386                 [const krb5_data *pkdata; krb5_context context; krb5_principal principal;
 387                         pkdata = krb5_princ_component(context, principal, 0);],
 388                 samba_cv_HAVE_KRB5_PRINC_COMPONENT=yes,
 389                 samba_cv_HAVE_KRB5_PRINC_COMPONENT=no)])
 390         if test x"$samba_cv_HAVE_KRB5_PRINC_COMPONENT" = x"yes"; then
 391                 AC_DEFINE(HAVE_KRB5_PRINC_COMPONENT,1,
 392                [Whether krb5_princ_component is available])
 393         fi
 394
 395         AC_CACHE_CHECK([for key in krb5_keytab_entry],
 396                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEY,[
 397                 AC_TRY_COMPILE([#include <krb5.h>],
 398                 [krb5_keytab_entry entry; krb5_keyblock e; entry.key = e;],
 399                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEY=yes,
 400                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEY=no)])
 401         if test x"$samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEY" = x"yes"; then
 402                 AC_DEFINE(HAVE_KRB5_KEYTAB_ENTRY_KEY,1,
 403                 [Whether krb5_keytab_entry has key member])
 404         fi
 405
 406         AC_CACHE_CHECK([for keyblock in krb5_keytab_entry],
 407                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK,[
 408                 AC_TRY_COMPILE([#include <krb5.h>],
 409                 [krb5_keytab_entry entry; entry.keyblock.keytype = 0;],
 410                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK=yes,
 411                 samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK=no)])
 412         if test x"$samba_cv_HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK" = x"yes"; then
 413                 AC_DEFINE(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK,1,
 414                 [Whether krb5_keytab_entry has keyblock member])
 415         fi
 416
 417         AC_CACHE_CHECK([for WRFILE: keytab support],
 418                 samba_cv_HAVE_WRFILE_KEYTAB,[
 419                 AC_TRY_RUN([
 420                 #include<krb5.h>
 421                 main()
 422                 {
 423                         krb5_context context;
 424                         krb5_keytab keytab;
 425                         krb5_init_context(&context);
 426                         return krb5_kt_resolve(context, "WRFILE:api", &keytab);
 427                 }],
 428                 samba_cv_HAVE_WRFILE_KEYTAB=yes,
 429                 samba_cv_HAVE_WRFILE_KEYTAB=no)])
 430         if test x"$samba_cv_HAVE_WRFILE_KEYTAB" = x"yes"; then
 431                 AC_DEFINE(HAVE_WRFILE_KEYTAB,1,
 432                 [Whether the WRFILE:-keytab is supported])
 433         fi
 434
 435         AC_CACHE_CHECK([for krb5_princ_realm returns krb5_realm or krb5_data],
 436                 samba_cv_KRB5_PRINC_REALM_RETURNS_REALM,[
 437                 AC_TRY_COMPILE([#include <krb5.h>],
 438                 [krb5_context context;krb5_principal principal;krb5_realm realm;
 439                         realm = *krb5_princ_realm(context, principal);],
 440                 samba_cv_KRB5_PRINC_REALM_RETURNS_REALM=yes,
 441                 samba_cv_KRB5_PRINC_REALM_RETURNS_REALM=no)])
 442         if test x"$samba_cv_KRB5_PRINC_REALM_RETURNS_REALM" = x"yes"; then
 443                 AC_DEFINE(KRB5_PRINC_REALM_RETURNS_REALM,1,
 444                 [Whether krb5_princ_realm returns krb5_realm or krb5_data])
 445         fi
 446
 447         # TODO: check all gssapi headers for this
 448         AC_CACHE_CHECK([for GSS_C_DCE_STYLE in gssapi.h],
 449                 samba_cv_GSS_C_DCE_STYLE,[
 450                 AC_TRY_COMPILE([#include <gssapi.h>],
 451                 [int flags = GSS_C_DCE_STYLE;],
 452                 samba_cv_GSS_C_DCE_STYLE=yes,
 453                 samba_cv_GSS_C_DCE_STYLE=no)])
 454
 455         AC_CHECK_FUNC_EXT(gsskrb5_get_initiator_subkey, $KRB5_LIBS)
 456         AC_CHECK_FUNC_EXT(gsskrb5_extract_authz_data_from_sec_context, $KRB5_LIBS)
 457
 458         if test x"$ac_cv_lib_ext_krb5_krb5_mk_req_extended" = x"yes"; then
 459                 AC_DEFINE(HAVE_KRB5,1,[Whether to have KRB5 support])
 460                 AC_MSG_CHECKING(whether KRB5 support is used)
 461                 SMB_EXT_LIB_ENABLE(KRB5,YES)
 462                 AC_MSG_RESULT(yes)
 463                 echo "KRB5_CFLAGS:   ${KRB5_CFLAGS}"
 464                 echo "KRB5_CPPFLAGS: ${KRB5_CPPFLAGS}"
 465                 echo "KRB5_LDFLAGS:  ${KRB5_LDFLAGS}"
 466                 echo "KRB5_LIBS:     ${KRB5_LIBS}"
 467         else
 468                 if test x"$with_krb5_support" = x"yes"; then
 469                         AC_MSG_ERROR(a working krb5 library is needed for KRB5 support)
 470                 else
 471                         AC_MSG_WARN(a working krb5 library is needed for KRB5 support)
 472                 fi
 473                 KRB5_CFLAGS=""
 474                 KRB5_CPPFLAGS=""
 475                 KRB5_LDFLAGS=""
 476                 KRB5_LIBS=""
 477                 with_krb5_support=no
 478         fi
 479
 480         CFLAGS=$ac_save_CFLAGS
 481         CPPFLAGS=$ac_save_CPPFLAGS
 482         LDFLAGS=$ac_save_LDFLAGS
 483         LIBS="$ac_save_LIBS"
 484
 485         # as a nasty hack add the krb5 stuff to the global vars,
 486         # at some point this should not be needed anymore when the build system
 487         # can handle that alone
 488         CFLAGS="$CFLAGS $KRB5_CFLAGS"
 489         CPPFLAGS="$CPPFLAGS $KRB5_CPPFLAGS"
 490         LDFLAGS="$LDFLAGS $KRB5_LDFLAGS"
 491 fi
 492
 493 SMB_EXT_LIB(KRB5,[${KRB5_LIBS}],[${KRB5_CFLAGS}],[${KRB5_CPPFLAGS}],[${KRB5_LDFLAGS}])