lib/curl_gssapi.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 2011 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
   9  *
  10  * This software is licensed as described in the file COPYING, which
  11  * you should have received as part of this distribution. The terms
  12  * are also available at http://curl.haxx.se/docs/copyright.html.
  13  *
  14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  15  * copies of the Software, and permit persons to whom the Software is
  16  * furnished to do so, under the terms of the COPYING file.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ***************************************************************************/
  22
  23 #include "curl_setup.h"
  24
  25 #ifdef HAVE_GSSAPI
  26
  27 #include "curl_gssapi.h"
  28 #include "sendf.h"
  29
  30 static const char spnego_oid_bytes[] = "\x2b\x06\x01\x05\x05\x02";
  31 gss_OID_desc Curl_spnego_mech_oid = { 6, &spnego_oid_bytes };
  32 static const char krb5_oid_bytes[] = "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02";
  33 gss_OID_desc Curl_krb5_mech_oid = { 9, &krb5_oid_bytes };
  34
  35 OM_uint32 Curl_gss_init_sec_context(
  36     struct SessionHandle *data,
  37     OM_uint32 *minor_status,
  38     gss_ctx_id_t *context,
  39     gss_name_t target_name,
  40     gss_OID mech_type,
  41     gss_channel_bindings_t input_chan_bindings,
  42     gss_buffer_t input_token,
  43     gss_buffer_t output_token,
  44     const bool mutual_auth,
  45     OM_uint32 *ret_flags)
  46 {
  47   OM_uint32 req_flags = GSS_C_REPLAY_FLAG;
  48
  49   if(mutual_auth)
  50     req_flags |= GSS_C_MUTUAL_FLAG;
  51
  52   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) {
  53 #ifdef GSS_C_DELEG_POLICY_FLAG
  54     req_flags |= GSS_C_DELEG_POLICY_FLAG;
  55 #else
  56     infof(data, "warning: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not "
  57         "compiled in\n");
  58 #endif
  59   }
  60
  61   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG)
  62     req_flags |= GSS_C_DELEG_FLAG;
  63
  64   return gss_init_sec_context(minor_status,
  65                               GSS_C_NO_CREDENTIAL, /* cred_handle */
  66                               context,
  67                               target_name,
  68                               mech_type,
  69                               req_flags,
  70                               0, /* time_req */
  71                               input_chan_bindings,
  72                               input_token,
  73                               NULL, /* actual_mech_type */
  74                               output_token,
  75                               ret_flags,
  76                               NULL /* time_rec */);
  77 }
  78
  79 /*
  80  * Curl_gss_log_error()
  81  *
  82  * This is used to log a GSS-API error status.
  83  *
  84  * Parameters:
  85  *
  86  * data    [in] - The session handle.
  87  * status  [in] - The status code.
  88  * prefix  [in] - The prefix of the log message.
  89  */
  90 void Curl_gss_log_error(struct SessionHandle *data, OM_uint32 status,
  91                         const char *prefix)
  92 {
  93   OM_uint32 maj_stat;
  94   OM_uint32 min_stat;
  95   OM_uint32 msg_ctx = 0;
  96   gss_buffer_desc status_string;
  97   char buf[1024];
  98   size_t len;
  99
 100   snprintf(buf, sizeof(buf), "%s", prefix);
 101   len = strlen(buf);
 102   do {
 103     maj_stat = gss_display_status(&min_stat,
 104                                   status,
 105                                   GSS_C_MECH_CODE,
 106                                   GSS_C_NO_OID,
 107                                   &msg_ctx,
 108                                   &status_string);
 109     if(sizeof(buf) > len + status_string.length + 1) {
 110       snprintf(buf + len, sizeof(buf) - len,
 111         ": %s", (char*)status_string.value);
 112       len += status_string.length;
 113     }
 114     gss_release_buffer(&min_stat, &status_string);
 115   } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
 116
 117   infof(data, "%s\n", buf);
 118 }
 119
 120 #endif /* HAVE_GSSAPI */