Utilities/cmcurl/lib/curl_gssapi.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 2011 - 2022, 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 https://curl.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  * SPDX-License-Identifier: curl
  22  *
  23  ***************************************************************************/
  24
  25 #include "curl_setup.h"
  26
  27 #ifdef HAVE_GSSAPI
  28
  29 #include "curl_gssapi.h"
  30 #include "sendf.h"
  31
  32 /* The last 3 #include files should be in this order */
  33 #include "curl_printf.h"
  34 #include "curl_memory.h"
  35 #include "memdebug.h"
  36
  37 gss_OID_desc Curl_spnego_mech_oid = {
  38   6, (char *)"\x2b\x06\x01\x05\x05\x02"
  39 };
  40 gss_OID_desc Curl_krb5_mech_oid = {
  41   9, (char *)"\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"
  42 };
  43
  44 OM_uint32 Curl_gss_init_sec_context(
  45     struct Curl_easy *data,
  46     OM_uint32 *minor_status,
  47     gss_ctx_id_t *context,
  48     gss_name_t target_name,
  49     gss_OID mech_type,
  50     gss_channel_bindings_t input_chan_bindings,
  51     gss_buffer_t input_token,
  52     gss_buffer_t output_token,
  53     const bool mutual_auth,
  54     OM_uint32 *ret_flags)
  55 {
  56   OM_uint32 req_flags = GSS_C_REPLAY_FLAG;
  57
  58   if(mutual_auth)
  59     req_flags |= GSS_C_MUTUAL_FLAG;
  60
  61   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) {
  62 #ifdef GSS_C_DELEG_POLICY_FLAG
  63     req_flags |= GSS_C_DELEG_POLICY_FLAG;
  64 #else
  65     infof(data, "WARNING: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not "
  66         "compiled in");
  67 #endif
  68   }
  69
  70   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG)
  71     req_flags |= GSS_C_DELEG_FLAG;
  72
  73   return gss_init_sec_context(minor_status,
  74                               GSS_C_NO_CREDENTIAL, /* cred_handle */
  75                               context,
  76                               target_name,
  77                               mech_type,
  78                               req_flags,
  79                               0, /* time_req */
  80                               input_chan_bindings,
  81                               input_token,
  82                               NULL, /* actual_mech_type */
  83                               output_token,
  84                               ret_flags,
  85                               NULL /* time_rec */);
  86 }
  87
  88 #define GSS_LOG_BUFFER_LEN 1024
  89 static size_t display_gss_error(OM_uint32 status, int type,
  90                                 char *buf, size_t len) {
  91   OM_uint32 maj_stat;
  92   OM_uint32 min_stat;
  93   OM_uint32 msg_ctx = 0;
  94   gss_buffer_desc status_string = GSS_C_EMPTY_BUFFER;
  95
  96   do {
  97     maj_stat = gss_display_status(&min_stat,
  98                                   status,
  99                                   type,
 100                                   GSS_C_NO_OID,
 101                                   &msg_ctx,
 102                                   &status_string);
 103     if(maj_stat == GSS_S_COMPLETE && status_string.length > 0) {
 104       if(GSS_LOG_BUFFER_LEN > len + status_string.length + 3) {
 105         len += msnprintf(buf + len, GSS_LOG_BUFFER_LEN - len,
 106                          "%.*s. ", (int)status_string.length,
 107                          (char *)status_string.value);
 108       }
 109     }
 110     gss_release_buffer(&min_stat, &status_string);
 111   } while(!GSS_ERROR(maj_stat) && msg_ctx);
 112
 113   return len;
 114 }
 115
 116 /*
 117  * Curl_gss_log_error()
 118  *
 119  * This is used to log a GSS-API error status.
 120  *
 121  * Parameters:
 122  *
 123  * data    [in] - The session handle.
 124  * prefix  [in] - The prefix of the log message.
 125  * major   [in] - The major status code.
 126  * minor   [in] - The minor status code.
 127  */
 128 void Curl_gss_log_error(struct Curl_easy *data, const char *prefix,
 129                         OM_uint32 major, OM_uint32 minor)
 130 {
 131   char buf[GSS_LOG_BUFFER_LEN];
 132   size_t len = 0;
 133
 134   if(major != GSS_S_FAILURE)
 135     len = display_gss_error(major, GSS_C_GSS_CODE, buf, len);
 136
 137   display_gss_error(minor, GSS_C_MECH_CODE, buf, len);
 138
 139   infof(data, "%s%s", prefix, buf);
 140 #ifdef CURL_DISABLE_VERBOSE_STRINGS
 141   (void)data;
 142   (void)prefix;
 143 #endif
 144 }
 145
 146 #endif /* HAVE_GSSAPI */