source4/heimdal/lib/gssapi/mech/gss_store_cred_into.c

   1 /*
   2  * Copyright (c) 2009 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "mech_locl.h"
  35
  36 static OM_uint32
  37 store_mech_cred(OM_uint32 *minor_status,
  38                 gssapi_mech_interface m,
  39                 const struct _gss_mechanism_cred *mc,
  40                 gss_cred_usage_t input_usage,
  41                 OM_uint32 store_cred_flags,
  42                 gss_const_key_value_set_t cred_store,
  43                 gss_cred_usage_t *usage_stored,
  44                 gss_buffer_set_t *env)
  45 {
  46     OM_uint32 major_status;
  47     OM_uint32 overwrite_cred =
  48         !!(store_cred_flags & GSS_C_STORE_CRED_OVERWRITE);
  49     OM_uint32 default_cred = !!(store_cred_flags & GSS_C_STORE_CRED_DEFAULT);
  50
  51     if (m->gm_store_cred_into2)
  52         major_status = m->gm_store_cred_into2(minor_status, mc->gmc_cred,
  53                                               input_usage, &m->gm_mech_oid,
  54                                               store_cred_flags, cred_store,
  55                                               NULL, usage_stored,
  56                                               env);
  57     else if (m->gm_store_cred_into)
  58         major_status = m->gm_store_cred_into(minor_status, mc->gmc_cred,
  59                                              input_usage, &m->gm_mech_oid,
  60                                              overwrite_cred, default_cred,
  61                                              cred_store, NULL, usage_stored);
  62     else if (cred_store == GSS_C_NO_CRED_STORE && m->gm_store_cred)
  63         major_status = m->gm_store_cred(minor_status, mc->gmc_cred,
  64                                         input_usage, &m->gm_mech_oid,
  65                                         overwrite_cred, default_cred,
  66                                         NULL, usage_stored);
  67     else
  68         major_status = GSS_S_UNAVAILABLE;
  69
  70     return major_status;
  71 }
  72
  73 /*
  74  * See RFC5588 for gss_store_cred().  This function is a variant that takes a
  75  * const key/value hashmap-like thing that specifies a credential store in a
  76  * mechanism- and implementation-specific way, though Heimdal and MIT agree on
  77  * at least the following keys for the Kerberos mechanism: ccache, keytab, and
  78  * client_keytab.  A set of environment variables may be output as well
  79  */
  80 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
  81 gss_store_cred_into2(OM_uint32 *minor_status,
  82                      gss_const_cred_id_t input_cred_handle,
  83                      gss_cred_usage_t input_usage,
  84                      const gss_OID desired_mech,
  85                      OM_uint32 store_cred_flags,
  86                      gss_const_key_value_set_t cred_store,
  87                      gss_OID_set *elements_stored,
  88                      gss_cred_usage_t *cred_usage_stored,
  89                      gss_buffer_set_t *env)
  90 {
  91     struct _gss_cred *cred = (struct _gss_cred *)input_cred_handle;
  92     struct _gss_mechanism_cred *mc;
  93     OM_uint32 major_status;
  94     OM_uint32 minor;
  95     size_t successes;
  96
  97     if (env != NULL)
  98         *env = NULL;
  99
 100     if (input_cred_handle == NULL)
 101         return GSS_S_CALL_INACCESSIBLE_READ;
 102
 103     if (minor_status == NULL)
 104         return GSS_S_CALL_INACCESSIBLE_WRITE;
 105     *minor_status = 0;
 106
 107     if (cred_usage_stored)
 108         *cred_usage_stored = 0;
 109
 110     if (elements_stored) {
 111         *elements_stored = GSS_C_NO_OID_SET;
 112
 113         major_status = gss_create_empty_oid_set(minor_status,
 114                                                 elements_stored);
 115         if (major_status != GSS_S_COMPLETE)
 116             return major_status;
 117     }
 118
 119     major_status = GSS_S_NO_CRED;
 120     successes = 0;
 121
 122     HEIM_TAILQ_FOREACH(mc, &cred->gc_mc, gmc_link) {
 123         gssapi_mech_interface m = mc->gmc_mech;
 124
 125         if (m == NULL || (m->gm_flags & GM_USE_MG_CRED) != 0)
 126             continue;
 127
 128         if (desired_mech != GSS_C_NO_OID &&
 129             !gss_oid_equal(&m->gm_mech_oid, desired_mech))
 130             continue;
 131
 132         major_status = store_mech_cred(minor_status, m, mc, input_usage,
 133                                        store_cred_flags, cred_store,
 134                                        cred_usage_stored, env);
 135         if (major_status == GSS_S_COMPLETE) {
 136             if (elements_stored && desired_mech != GSS_C_NO_OID)
 137                 gss_add_oid_set_member(&minor, desired_mech, elements_stored);
 138             successes++;
 139         } else if (desired_mech != GSS_C_NO_OID) {
 140             _gss_mg_error(m, *minor_status);
 141             gss_release_oid_set(&minor, elements_stored);
 142             return major_status;
 143         }
 144     }
 145
 146     if (successes > 0) {
 147         *minor_status = 0;
 148         major_status = GSS_S_COMPLETE;
 149     }
 150
 151     heim_assert(successes || major_status != GSS_S_COMPLETE,
 152                 "cred storage failed, but no error raised");
 153
 154     return major_status;
 155 }
 156
 157 /*
 158  * See RFC5588 for gss_store_cred().  This function is a variant that takes a
 159  * const key/value hashmap-like thing that specifies a credential store in a
 160  * mechanism- and implementation-specific way, though Heimdal and MIT agree on
 161  * at least the following keys for the Kerberos mechanism: ccache, keytab, and
 162  * client_keytab.
 163  */
 164 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 165 gss_store_cred_into(OM_uint32 *minor_status,
 166                     gss_const_cred_id_t input_cred_handle,
 167                     gss_cred_usage_t input_usage,
 168                     const gss_OID desired_mech,
 169                     OM_uint32 overwrite_cred,
 170                     OM_uint32 default_cred,
 171                     gss_const_key_value_set_t cred_store,
 172                     gss_OID_set *elements_stored,
 173                     gss_cred_usage_t *cred_usage_stored)
 174 {
 175     OM_uint32 store_cred_flags =
 176         (overwrite_cred ? GSS_C_STORE_CRED_OVERWRITE : 0) |
 177         (default_cred ? GSS_C_STORE_CRED_DEFAULT : 0);
 178     return gss_store_cred_into2(minor_status, input_cred_handle, input_usage,
 179                                 desired_mech, store_cred_flags, cred_store,
 180                                 elements_stored, cred_usage_stored, NULL);
 181 }