Utilities/cmcurl/lib/curl_gssapi.c

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