lustre/utils/gss/lgss_krb5_utils.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Modifications for Lustre
   5  * Copyright 2007, Cluster File Systems, Inc.
   6  * All rights reserved
   7  * Author: Eric Mei <ericm@clusterfs.com>
   8  */
   9
  10 #ifndef LGSS_KRB5_UTILS_H
  11 #define LGSS_KRB5_UTILS_H
  12
  13 #ifndef _GNU_SOURCE
  14 #define _GNU_SOURCE
  15 #endif
  16 #include <string.h>
  17 #include <krb5.h>
  18
  19 #include "lgss_utils.h"
  20
  21 extern struct lgss_mech_type lgss_mech_krb5;
  22
  23 /*
  24  * convenient macros, these perhaps need further cleanup
  25  */
  26 #ifdef HAVE_KRB5
  27
  28 #define KEYTAB_ENTRY_MATCH(kte, name)                                           \
  29         (                                                                       \
  30          (kte).principal->data[0].length == (sizeof(name)-1) &&                 \
  31          strncmp((kte).principal->data[0].data, (name), sizeof(name)-1) == 0    \
  32         )
  33
  34 #define KRB5_FREE_UNPARSED_NAME(ctx, name)                                      \
  35         krb5_free_unparsed_name((ctx), (name));
  36
  37 #define KRB5_STRDUP(str)                                                        \
  38         strndup((str).data, (str).length)
  39
  40 #define KRB5_STRCMP(str, name)                                                  \
  41         (                                                                       \
  42          (str)->length != strlen(name) ||                                       \
  43          strncmp((str)->data, (name), (str)->length) != 0                       \
  44         )
  45
  46 #define KRB5_STRCASECMP(str, name)                                              \
  47         (                                                                       \
  48          (str)->length != strlen(name) ||                                       \
  49          strncasecmp((str)->data, (name), (str)->length) != 0                   \
  50         )
  51
  52 static inline
  53 char *lgss_krb5_strdup(krb5_data *kstr)
  54 {
  55         return strndup(kstr->data, kstr->length);
  56 }
  57
  58 static inline
  59 int lgss_krb5_strcmp(krb5_data *kstr, const char *str)
  60 {
  61         return (kstr->length != strlen(str) ||
  62                 memcmp(kstr->data, str, kstr->length) != 0);
  63 }
  64
  65 static inline
  66 int lgss_krb5_strcasecmp(krb5_data *kstr, const char *str)
  67 {
  68         return (kstr->length != strlen(str) ||
  69                 strncasecmp(kstr->data, str, kstr->length) != 0);
  70 }
  71
  72 #else /* !HAVE_KRB5 */
  73
  74 #define KEYTAB_ENTRY_MATCH(kte, name)                                           \
  75         (                                                                       \
  76          strlen((kte).principal->name.name_string.val[0]) ==                    \
  77          (sizeof(name)-1) &&                                                    \
  78          strncmp(kte.principal->name.name_string.val[0], (name),                \
  79                  sizeof(name)-1) == 0                                           \
  80         )
  81
  82 #define KRB5_FREE_UNPARSED_NAME(ctx, name)                                      \
  83         free(pname);
  84
  85 #define KRB5_STRDUP(str)                                                        \
  86         strdup(str)
  87
  88 #define KRB5_STRCMP(str, name)                                                  \
  89         strcmp((str), (name))
  90
  91 #define KRB5_STRCASECMP(str, name)                                              \
  92         strcmp((str), (name))
  93
  94 #endif /* HAVE_KRB5 */
  95
  96 #endif /* LGSS_KRB5_UTILS_H */