CMakeLua/Utilities/cmcurl-7.19.0/lib/http_negotiate.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2008, 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  * $Id: http_negotiate.c,v 1.1.1.1 2008-09-23 16:32:05 hoffman Exp $
  22  ***************************************************************************/
  23 #include "setup.h"
  24
  25 #ifdef HAVE_GSSAPI
  26 #ifdef HAVE_OLD_GSSMIT
  27 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
  28 #endif
  29
  30 #ifndef CURL_DISABLE_HTTP
  31  /* -- WIN32 approved -- */
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <stdarg.h>
  35 #include <stdlib.h>
  36 #include <ctype.h>
  37
  38 #include "urldata.h"
  39 #include "sendf.h"
  40 #include "strequal.h"
  41 #include "curl_base64.h"
  42 #include "http_negotiate.h"
  43 #include "memory.h"
  44
  45 #ifdef HAVE_SPNEGO
  46 #  include <spnegohelp.h>
  47 #  ifdef USE_SSLEAY
  48 #    ifdef USE_OPENSSL
  49 #      include <openssl/objects.h>
  50 #    else
  51 #      include <objects.h>
  52 #    endif
  53 #  else
  54 #    error "Can't compile SPNEGO support without OpenSSL."
  55 #  endif
  56 #endif
  57
  58 #define _MPRINTF_REPLACE /* use our functions only */
  59 #include <curl/mprintf.h>
  60
  61 /* The last #include file should be: */
  62 #include "memdebug.h"
  63
  64 static int
  65 get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
  66 {
  67   struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
  68     &conn->data->state.negotiate;
  69   OM_uint32 major_status, minor_status;
  70   gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
  71   char name[2048];
  72   const char* service;
  73
  74   /* GSSAPI implementation by Globus (known as GSI) requires the name to be
  75      of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
  76      of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
  77      Change following lines if you want to use GSI */
  78
  79   /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name */
  80
  81   if(neg_ctx->gss)
  82     service = "KHTTP";
  83   else
  84     service = "HTTP";
  85
  86   token.length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
  87                                               conn->host.name) + 1;
  88   if(token.length + 1 > sizeof(name))
  89     return EMSGSIZE;
  90
  91   snprintf(name, sizeof(name), "%s@%s", service, proxy ? conn->proxy.name :
  92            conn->host.name);
  93
  94   token.value = (void *) name;
  95   major_status = gss_import_name(&minor_status,
  96                                  &token,
  97                                  GSS_C_NT_HOSTBASED_SERVICE,
  98                                  server);
  99
 100   return GSS_ERROR(major_status) ? -1 : 0;
 101 }
 102
 103 static void
 104 log_gss_error(struct connectdata *conn, OM_uint32 error_status, char *prefix)
 105 {
 106   OM_uint32 maj_stat, min_stat;
 107   OM_uint32 msg_ctx = 0;
 108   gss_buffer_desc status_string;
 109   char buf[1024];
 110   size_t len;
 111
 112   snprintf(buf, sizeof(buf), "%s", prefix);
 113   len = strlen(buf);
 114   do {
 115     maj_stat = gss_display_status(&min_stat,
 116                                   error_status,
 117                                   GSS_C_MECH_CODE,
 118                                   GSS_C_NO_OID,
 119                                   &msg_ctx,
 120                                   &status_string);
 121       if(sizeof(buf) > len + status_string.length + 1) {
 122         snprintf(buf + len, sizeof(buf) - len,
 123                  ": %s", (char*) status_string.value);
 124       len += status_string.length;
 125     }
 126     gss_release_buffer(&min_stat, &status_string);
 127   } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
 128
 129   infof(conn->data, "%s", buf);
 130 }
 131
 132 /* returning zero (0) means success, everything else is treated as "failure"
 133    with no care exactly what the failure was */
 134 int Curl_input_negotiate(struct connectdata *conn, bool proxy,
 135                          const char *header)
 136 {
 137   struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
 138     &conn->data->state.negotiate;
 139   OM_uint32 major_status, minor_status, minor_status2;
 140   gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
 141   gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
 142   int ret;
 143   size_t len;
 144   bool gss;
 145   const char* protocol;
 146
 147   while(*header && ISSPACE(*header))
 148     header++;
 149   if(checkprefix("GSS-Negotiate", header)) {
 150     protocol = "GSS-Negotiate";
 151     gss = TRUE;
 152   }
 153   else if(checkprefix("Negotiate", header)) {
 154     protocol = "Negotiate";
 155     gss = FALSE;
 156   }
 157   else
 158     return -1;
 159
 160   if(neg_ctx->context) {
 161     if(neg_ctx->gss != gss) {
 162       return -1;
 163     }
 164   }
 165   else {
 166     neg_ctx->protocol = protocol;
 167     neg_ctx->gss = gss;
 168   }
 169
 170   if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
 171     /* We finished succesfully our part of authentication, but server
 172      * rejected it (since we're again here). Exit with an error since we
 173      * can't invent anything better */
 174     Curl_cleanup_negotiate(conn->data);
 175     return -1;
 176   }
 177
 178   if(neg_ctx->server_name == NULL &&
 179       (ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
 180     return ret;
 181
 182   header += strlen(neg_ctx->protocol);
 183   while(*header && ISSPACE(*header))
 184     header++;
 185
 186   len = strlen(header);
 187   if(len > 0) {
 188     int rawlen = Curl_base64_decode(header,
 189                                     (unsigned char **)&input_token.value);
 190     if(rawlen < 0)
 191       return -1;
 192     input_token.length = rawlen;
 193
 194 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
 195     if(checkprefix("Negotiate", header)) {
 196         ASN1_OBJECT *   object            = NULL;
 197         int             rc                = 1;
 198         unsigned char * spnegoToken       = NULL;
 199         size_t          spnegoTokenLength = 0;
 200         unsigned char * mechToken         = NULL;
 201         size_t          mechTokenLength   = 0;
 202
 203         if(input_token.value == NULL)
 204           return CURLE_OUT_OF_MEMORY;
 205
 206         spnegoToken = malloc(input_token.length);
 207         if(spnegoToken == NULL)
 208           return CURLE_OUT_OF_MEMORY;
 209
 210         spnegoTokenLength = input_token.length;
 211
 212         object = OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
 213         if(!parseSpnegoTargetToken(spnegoToken,
 214                                     spnegoTokenLength,
 215                                     NULL,
 216                                     NULL,
 217                                     &mechToken,
 218                                     &mechTokenLength,
 219                                     NULL,
 220                                     NULL)) {
 221           free(spnegoToken);
 222           spnegoToken = NULL;
 223           infof(conn->data, "Parse SPNEGO Target Token failed\n");
 224         }
 225         else {
 226           free(input_token.value);
 227           input_token.value = malloc(mechTokenLength);
 228           if (input_token.value == NULL)
 229             return CURLE_OUT_OF_MEMORY;
 230
 231           memcpy(input_token.value, mechToken,mechTokenLength);
 232           input_token.length = mechTokenLength;
 233           free(mechToken);
 234           mechToken = NULL;
 235           infof(conn->data, "Parse SPNEGO Target Token succeeded\n");
 236         }
 237     }
 238 #endif
 239   }
 240
 241   major_status = gss_init_sec_context(&minor_status,
 242                                       GSS_C_NO_CREDENTIAL,
 243                                       &neg_ctx->context,
 244                                       neg_ctx->server_name,
 245                                       GSS_C_NO_OID,
 246                                       GSS_C_DELEG_FLAG,
 247                                       0,
 248                                       GSS_C_NO_CHANNEL_BINDINGS,
 249                                       &input_token,
 250                                       NULL,
 251                                       &output_token,
 252                                       NULL,
 253                                       NULL);
 254   if(input_token.length > 0)
 255     gss_release_buffer(&minor_status2, &input_token);
 256   neg_ctx->status = major_status;
 257   if(GSS_ERROR(major_status)) {
 258     /* Curl_cleanup_negotiate(conn->data) ??? */
 259     log_gss_error(conn, minor_status,
 260                   (char *)"gss_init_sec_context() failed: ");
 261     return -1;
 262   }
 263
 264   if(output_token.length == 0) {
 265     return -1;
 266   }
 267
 268   neg_ctx->output_token = output_token;
 269   /* conn->bits.close = FALSE; */
 270
 271   return 0;
 272 }
 273
 274
 275 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
 276 {
 277   struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
 278     &conn->data->state.negotiate;
 279   char *encoded = NULL;
 280   int len;
 281
 282 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
 283   if(checkprefix("Negotiate", neg_ctx->protocol)) {
 284     ASN1_OBJECT *   object            = NULL;
 285     int             rc                = 1;
 286     unsigned char * spnegoToken       = NULL;
 287     size_t          spnegoTokenLength = 0;
 288     unsigned char * responseToken       = NULL;
 289     size_t          responseTokenLength = 0;
 290
 291     responseToken = malloc(neg_ctx->output_token.length);
 292     if( responseToken == NULL)
 293       return CURLE_OUT_OF_MEMORY;
 294     memcpy(responseToken, neg_ctx->output_token.value,
 295            neg_ctx->output_token.length);
 296     responseTokenLength = neg_ctx->output_token.length;
 297
 298     object=OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
 299     if(!makeSpnegoInitialToken (object,
 300                                  responseToken,
 301                                  responseTokenLength,
 302                                  &spnegoToken,
 303                                  &spnegoTokenLength)) {
 304       free(responseToken);
 305       responseToken = NULL;
 306       infof(conn->data, "Make SPNEGO Initial Token failed\n");
 307     }
 308     else {
 309       free(neg_ctx->output_token.value);
 310       responseToken = NULL;
 311       neg_ctx->output_token.value = malloc(spnegoTokenLength);
 312       memcpy(neg_ctx->output_token.value, spnegoToken,spnegoTokenLength);
 313       neg_ctx->output_token.length = spnegoTokenLength;
 314       free(spnegoToken);
 315       spnegoToken = NULL;
 316       infof(conn->data, "Make SPNEGO Initial Token succeeded\n");
 317     }
 318   }
 319 #endif
 320   len = Curl_base64_encode(conn->data,
 321                            neg_ctx->output_token.value,
 322                            neg_ctx->output_token.length,
 323                            &encoded);
 324
 325   if(len == 0)
 326     return CURLE_OUT_OF_MEMORY;
 327
 328   conn->allocptr.userpwd =
 329     aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
 330             neg_ctx->protocol, encoded);
 331   free(encoded);
 332   Curl_cleanup_negotiate (conn->data);
 333   return (conn->allocptr.userpwd == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
 334 }
 335
 336 static void cleanup(struct negotiatedata *neg_ctx)
 337 {
 338   OM_uint32 minor_status;
 339   if(neg_ctx->context != GSS_C_NO_CONTEXT)
 340     gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
 341
 342   if(neg_ctx->output_token.length != 0)
 343     gss_release_buffer(&minor_status, &neg_ctx->output_token);
 344
 345   if(neg_ctx->server_name != GSS_C_NO_NAME)
 346     gss_release_name(&minor_status, &neg_ctx->server_name);
 347
 348   memset(neg_ctx, 0, sizeof(*neg_ctx));
 349 }
 350
 351 void Curl_cleanup_negotiate(struct SessionHandle *data)
 352 {
 353   cleanup(&data->state.negotiate);
 354   cleanup(&data->state.proxyneg);
 355 }
 356
 357
 358 #endif
 359 #endif