lib/gssapi/mech/context.c

   1 #include "mech_locl.h"
   2 #include "heim_threads.h"
   3
   4 struct mg_thread_ctx {
   5     gss_OID mech;
   6     OM_uint32 maj_stat;
   7     OM_uint32 min_stat;
   8     gss_buffer_desc maj_error;
   9     gss_buffer_desc min_error;
  10 };
  11
  12 static HEIMDAL_MUTEX context_mutex = HEIMDAL_MUTEX_INITIALIZER;
  13 static int created_key;
  14 static HEIMDAL_thread_key context_key;
  15
  16
  17 static void
  18 destroy_context(void *ptr)
  19 {
  20     struct mg_thread_ctx *mg = ptr;
  21     OM_uint32 junk;
  22
  23     if (mg == NULL)
  24         return;
  25
  26     gss_release_buffer(&junk, &mg->maj_error);
  27     gss_release_buffer(&junk, &mg->min_error);
  28     free(mg);
  29 }
  30
  31
  32 static struct mg_thread_ctx *
  33 _gss_mechglue_thread(void)
  34 {
  35     struct mg_thread_ctx *ctx;
  36     int ret = 0;
  37
  38     HEIMDAL_MUTEX_lock(&context_mutex);
  39
  40     if (!created_key) {
  41         HEIMDAL_key_create(&context_key, destroy_context, ret);
  42         if (ret) {
  43             HEIMDAL_MUTEX_unlock(&context_mutex);
  44             return NULL;
  45         }
  46         created_key = 1;
  47     }
  48     HEIMDAL_MUTEX_unlock(&context_mutex);
  49
  50     ctx = HEIMDAL_getspecific(context_key);
  51     if (ctx == NULL) {
  52
  53         ctx = calloc(1, sizeof(*ctx));
  54         if (ctx == NULL)
  55             return NULL;
  56         HEIMDAL_setspecific(context_key, ctx, ret);
  57         if (ret) {
  58             free(ctx);
  59             return NULL;
  60         }
  61     }
  62     return ctx;
  63 }
  64
  65 OM_uint32
  66 _gss_mg_get_error(const gss_OID mech, OM_uint32 type,
  67                   OM_uint32 value, gss_buffer_t string)
  68 {
  69     struct mg_thread_ctx *mg;
  70
  71     mg = _gss_mechglue_thread();
  72     if (mg == NULL)
  73         return GSS_S_BAD_STATUS;
  74
  75 #if 0
  76     /*
  77      * We cant check the mech here since a pseudo-mech might have
  78      * called an lower layer and then the mech info is all broken
  79      */
  80     if (mech != NULL && gss_oid_equal(mg->mech, mech) == 0)
  81         return GSS_S_BAD_STATUS;
  82 #endif
  83
  84     switch (type) {
  85     case GSS_C_GSS_CODE: {
  86         if (value != mg->maj_stat || mg->maj_error.length == 0)
  87             break;
  88         string->value = malloc(mg->maj_error.length + 1);
  89         string->length = mg->maj_error.length;
  90         memcpy(string->value, mg->maj_error.value, mg->maj_error.length);
  91         ((char *) string->value)[string->length] = '\0';
  92         return GSS_S_COMPLETE;
  93     }
  94     case GSS_C_MECH_CODE: {
  95         if (value != mg->min_stat || mg->min_error.length == 0)
  96             break;
  97         string->value = malloc(mg->min_error.length + 1);
  98         string->length = mg->min_error.length;
  99         memcpy(string->value, mg->min_error.value, mg->min_error.length);
 100         ((char *) string->value)[string->length] = '\0';
 101         return GSS_S_COMPLETE;
 102     }
 103     }
 104     string->value = NULL;
 105     string->length = 0;
 106     return GSS_S_BAD_STATUS;
 107 }
 108
 109 void
 110 _gss_mg_error(gssapi_mech_interface m, OM_uint32 maj, OM_uint32 min)
 111 {
 112     OM_uint32 major_status, minor_status;
 113     OM_uint32 message_content;
 114     struct mg_thread_ctx *mg;
 115
 116     /*
 117      * Mechs without gss_display_status() does
 118      * gss_mg_collect_error() by themself.
 119      */
 120     if (m->gm_display_status == NULL)
 121         return ;
 122
 123     mg = _gss_mechglue_thread();
 124     if (mg == NULL)
 125         return;
 126
 127     gss_release_buffer(&minor_status, &mg->maj_error);
 128     gss_release_buffer(&minor_status, &mg->min_error);
 129
 130     mg->mech = &m->gm_mech_oid;
 131     mg->maj_stat = maj;
 132     mg->min_stat = min;
 133
 134     major_status = m->gm_display_status(&minor_status,
 135                                         maj,
 136                                         GSS_C_GSS_CODE,
 137                                         &m->gm_mech_oid,
 138                                         &message_content,
 139                                         &mg->maj_error);
 140     if (GSS_ERROR(major_status)) {
 141         mg->maj_error.value = NULL;
 142         mg->maj_error.length = 0;
 143     }
 144     major_status = m->gm_display_status(&minor_status,
 145                                         min,
 146                                         GSS_C_MECH_CODE,
 147                                         &m->gm_mech_oid,
 148                                         &message_content,
 149                                         &mg->min_error);
 150     if (GSS_ERROR(major_status)) {
 151         mg->min_error.value = NULL;
 152         mg->min_error.length = 0;
 153     }
 154 }
 155
 156 void
 157 gss_mg_collect_error(gss_OID mech, OM_uint32 maj, OM_uint32 min)
 158 {
 159     gssapi_mech_interface m = __gss_get_mechanism(mech);
 160     if (m == NULL)
 161         return;
 162     _gss_mg_error(m, maj, min);
 163 }