usr/src/lib/gss_mechs/mech_krb5/krb5/os/ktdefname.c

   1 /*
   2  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6
   7 /*
   8  * lib/krb5/os/ktdefname.c
   9  *
  10  * Copyright 1990 by the Massachusetts Institute of Technology.
  11  * All Rights Reserved.
  12  *
  13  * Export of this software from the United States of America may
  14  *   require a specific license from the United States Government.
  15  *   It is the responsibility of any person or organization contemplating
  16  *   export to obtain such a license before exporting.
  17  *
  18  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  19  * distribute this software and its documentation for any purpose and
  20  * without fee is hereby granted, provided that the above copyright
  21  * notice appear in all copies and that both that copyright notice and
  22  * this permission notice appear in supporting documentation, and that
  23  * the name of M.I.T. not be used in advertising or publicity pertaining
  24  * to distribution of the software without specific, written prior
  25  * permission.  Furthermore if you modify this software you must label
  26  * your software as modified software and not distribute it in such a
  27  * fashion that it might be confused with the original M.I.T. software.
  28  * M.I.T. makes no representations about the suitability of
  29  * this software for any purpose.  It is provided "as is" without express
  30  * or implied warranty.
  31  *
  32  *
  33  * Return default keytab file name.
  34  */
  35
  36 #define NEED_WINDOWS
  37
  38 #include "k5-int.h"
  39
  40 extern char *krb5_defkeyname;
  41
  42 /* this is a an exceedinly gross thing. */
  43 char *krb5_overridekeyname = NULL;
  44
  45 krb5_error_code KRB5_CALLCONV
  46 krb5_kt_default_name(krb5_context context, char *name, int namesize)
  47 {
  48     char *cp = 0;
  49     char *retval;
  50
  51     if (krb5_overridekeyname) {
  52         if ((size_t) namesize < (strlen(krb5_overridekeyname)+1))
  53             return KRB5_CONFIG_NOTENUFSPACE;
  54         /* Solaris Kerberos */
  55         strncpy(name, krb5_overridekeyname, namesize);
  56     } else if ((context->profile_secure == FALSE) &&
  57         (cp = getenv("KRB5_KTNAME"))) {
  58         if ((size_t) namesize < (strlen(cp)+1))
  59             return KRB5_CONFIG_NOTENUFSPACE;
  60         /* Solaris Kerberos */
  61         strncpy(name, cp, namesize);
  62     } else if ((profile_get_string(context->profile,
  63                                    "libdefaults",
  64                                    "default_keytab_name", NULL,
  65                                    NULL, &retval) == 0) &&
  66                retval) {
  67         if ((size_t) namesize < (strlen(retval)+1))
  68             return KRB5_CONFIG_NOTENUFSPACE;
  69         /* Solaris Kerberos */
  70         strncpy(name, retval, namesize);
  71         profile_release_string(retval);
  72     } else {
  73 #if defined(_WIN32)
  74         {
  75             char    defname[160];
  76             int     len;
  77
  78             len= GetWindowsDirectory( defname, sizeof(defname)-2 );
  79             defname[len]= '\0';
  80             if ( (len + strlen(krb5_defkeyname) + 1) > namesize )
  81                 return KRB5_CONFIG_NOTENUFSPACE;
  82             sprintf(name, krb5_defkeyname, defname);
  83         }
  84 #else
  85         if ((size_t) namesize < (strlen(krb5_defkeyname)+1))
  86             return KRB5_CONFIG_NOTENUFSPACE;
  87         /* Solaris Kerberos */
  88         strncpy(name, krb5_defkeyname, namesize);
  89 #endif
  90     }
  91     return 0;
  92 }
  93