src/core/sipe-ews-autodiscover.c

   1 /**
   2  * @file sipe-ews-autodiscover.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2013-2014 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * Specification references:
  24  *
  25  *   - POX: plain old XML autodiscover
  26  *   - [MS-OXDSCLI]:     http://msdn.microsoft.com/en-us/library/cc463896.aspx
  27  *   - POX autodiscover: http://msdn.microsoft.com/en-us/library/office/aa581522.aspx
  28  *   - POX redirect:     http://msdn.microsoft.com/en-us/library/office/dn467392.aspx
  29  */
  30
  31 #include <string.h>
  32
  33 #include <glib.h>
  34
  35 #include "sipe-backend.h"
  36 #include "sipe-common.h"
  37 #include "sipe-core.h"
  38 #include "sipe-core-private.h"
  39 #include "sipe-ews-autodiscover.h"
  40 #include "sipe-http.h"
  41 #include "sipe-utils.h"
  42 #include "sipe-xml.h"
  43
  44 struct sipe_ews_autodiscover_cb {
  45         sipe_ews_autodiscover_callback *cb;
  46         gpointer cb_data;
  47 };
  48
  49 struct sipe_ews_autodiscover {
  50         struct sipe_ews_autodiscover_data *data;
  51         struct sipe_http_request *request;
  52         GSList *callbacks;
  53         gchar *email;
  54         const gchar * const *method;
  55         gboolean retry;
  56         gboolean completed;
  57 };
  58
  59 static void sipe_ews_autodiscover_complete(struct sipe_core_private *sipe_private,
  60                                            struct sipe_ews_autodiscover_data *ews_data)
  61 {
  62         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
  63         GSList *entry = sea->callbacks;
  64
  65         while (entry) {
  66                 struct sipe_ews_autodiscover_cb *sea_cb = entry->data;
  67                 sea_cb->cb(sipe_private, ews_data, sea_cb->cb_data);
  68                 g_free(sea_cb);
  69                 entry = entry->next;
  70         }
  71         g_slist_free(sea->callbacks);
  72         sea->callbacks = NULL;
  73         sea->completed = TRUE;
  74 }
  75
  76 static void sipe_ews_autodiscover_request(struct sipe_core_private *sipe_private,
  77                                           gboolean next_method);
  78 static void sipe_ews_autodiscover_parse(struct sipe_core_private *sipe_private,
  79                                         const gchar *body)
  80 {
  81         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
  82         struct sipe_ews_autodiscover_data *ews_data = sea->data =
  83                 g_new0(struct sipe_ews_autodiscover_data, 1);
  84         sipe_xml *xml = sipe_xml_parse(body, strlen(body));
  85         const sipe_xml *account = sipe_xml_child(xml, "Response/Account");
  86         gboolean complete = TRUE;
  87
  88         /* valid POX autodiscover response? */
  89         if (account) {
  90                 const sipe_xml *node = sipe_xml_child(account, "Protocol");
  91
  92                 /* valid settings? */
  93                 if (node) {
  94
  95                         /* Autodiscover/Response/User/LegacyDN (requires trimming) */
  96                         gchar *tmp = sipe_xml_data(sipe_xml_child(xml,
  97                                                                   "Response/User/LegacyDN"));
  98                         if (tmp)
  99                                 ews_data->legacy_dn = g_strstrip(tmp);
 100
 101                         /* extract settings */
 102                         for (; node; node = sipe_xml_twin(node)) {
 103                                 gchar *type = sipe_xml_data(sipe_xml_child(node,
 104                                                                            "Type"));
 105
 106                                 if (sipe_strequal("EXCH", type)) {
 107                                         g_free(type);
 108
 109 #define _URL(name, field) \
 110                         { \
 111                                 ews_data->field = sipe_xml_data(sipe_xml_child(node, #name)); \
 112                                 SIPE_DEBUG_INFO("sipe_ews_autodiscover_parse: " #field " = '%s'", \
 113                                                 ews_data->field ? ews_data->field : "<NOT FOUND>"); \
 114                         }
 115
 116                                         _URL(ASUrl,  as_url);
 117                                         _URL(EwsUrl, ews_url);
 118                                         _URL(OABUrl, oab_url);
 119                                         _URL(OOFUrl, oof_url);
 120 #undef _URL
 121
 122                                         break;
 123
 124                                 }
 125                                 g_free(type);
 126                         }
 127
 128                 } else {
 129                         /*
 130                          * POX autodiscover redirect email address?
 131                          * Make sure email address contains a "@" character.
 132                          * Make sure email address is different from current one.
 133                          */
 134                         gchar *tmp = sipe_xml_data(sipe_xml_child(account,
 135                                                                   "RedirectAddr"));
 136                         if (tmp && strchr(tmp, '@') &&
 137                             !sipe_strequal(sea->email, tmp)) {
 138                                 g_free(sea->email);
 139                                 sea->email = tmp;
 140                                 tmp = NULL; /* sea takes ownership */
 141
 142                                 SIPE_DEBUG_INFO("sipe_ews_autodiscover_parse: restarting with email address '%s'",
 143                                                 sea->email);
 144
 145                                 /* restart process with new email address */
 146                                 sea->method = NULL;
 147                                 complete    = FALSE;
 148                                 sipe_ews_autodiscover_request(sipe_private,
 149                                                               TRUE);
 150                         }
 151                         g_free(tmp);
 152                 }
 153         }
 154         sipe_xml_free(xml);
 155
 156         if (complete)
 157                 sipe_ews_autodiscover_complete(sipe_private, ews_data);
 158 }
 159
 160 static void sipe_ews_autodiscover_response(struct sipe_core_private *sipe_private,
 161                                            guint status,
 162                                            SIPE_UNUSED_PARAMETER GSList *headers,
 163                                            const gchar *body,
 164                                            gpointer data)
 165 {
 166         struct sipe_ews_autodiscover *sea = data;
 167
 168         sea->request = NULL;
 169
 170         switch (status) {
 171         case SIPE_HTTP_STATUS_OK:
 172                 if (body)
 173                         sipe_ews_autodiscover_parse(sipe_private, body);
 174                 else
 175                         sipe_ews_autodiscover_request(sipe_private, TRUE);
 176                 break;
 177
 178         case SIPE_HTTP_STATUS_CLIENT_FORBIDDEN:
 179                 /*
 180                  * Authentication succeeded but we still weren't allowed to
 181                  * view the page. At least at our work place this error is
 182                  * temporary, i.e. the next access with the exact same
 183                  * authentication succeeds.
 184                  *
 185                  * Let's try again, but only once...
 186                  */
 187                 sipe_ews_autodiscover_request(sipe_private, !sea->retry);
 188                 break;
 189
 190         case SIPE_HTTP_STATUS_ABORTED:
 191                 /* we are not allowed to generate new requests */
 192                 break;
 193
 194         default:
 195                 sipe_ews_autodiscover_request(sipe_private, TRUE);
 196                 break;
 197         }
 198 }
 199
 200 static gboolean sipe_ews_autodiscover_url(struct sipe_core_private *sipe_private,
 201                                           const gchar *url)
 202 {
 203         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
 204         gchar *body = g_strdup_printf("<Autodiscover xmlns=\"http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006\">"
 205                                       " <Request>"
 206                                       "  <EMailAddress>%s</EMailAddress>"
 207                                       "  <AcceptableResponseSchema>http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>"
 208                                       " </Request>"
 209                                       "</Autodiscover>",
 210                                       sea->email);
 211
 212         SIPE_DEBUG_INFO("sipe_ews_autodiscover_url: trying '%s'", url);
 213
 214         sea->request = sipe_http_request_post(sipe_private,
 215                                               url,
 216                                               NULL,
 217                                               body,
 218                                               "text/xml",
 219                                               sipe_ews_autodiscover_response,
 220                                               sea);
 221         g_free(body);
 222
 223         if (sea->request) {
 224                 sipe_core_email_authentication(sipe_private,
 225                                                sea->request);
 226                 sipe_http_request_allow_redirect(sea->request);
 227                 sipe_http_request_ready(sea->request);
 228                 return(TRUE);
 229         }
 230
 231         return(FALSE);
 232 }
 233
 234 static void sipe_ews_autodiscover_request(struct sipe_core_private *sipe_private,
 235                                           gboolean next_method)
 236 {
 237         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
 238         static const gchar * const methods[] = {
 239                 "https://Autodiscover.%s/Autodiscover/Autodiscover.xml",
 240                 "http://Autodiscover.%s/Autodiscover/Autodiscover.xml",
 241                 "https://%s/Autodiscover/Autodiscover.xml",
 242                 NULL
 243         };
 244
 245         sea->retry = next_method;
 246         if (sea->method) {
 247                 if (next_method)
 248                         sea->method++;
 249         } else
 250                 sea->method = methods;
 251
 252         if (*sea->method) {
 253                 gchar *url = g_strdup_printf(*sea->method,
 254                                              strstr(sea->email, "@") + 1);
 255
 256                 if (!sipe_ews_autodiscover_url(sipe_private, url))
 257                         sipe_ews_autodiscover_request(sipe_private, TRUE);
 258
 259                 g_free(url);
 260
 261         } else {
 262                 SIPE_DEBUG_INFO_NOFORMAT("sipe_ews_autodiscover_request: no more methods to try!");
 263                 sipe_ews_autodiscover_complete(sipe_private, NULL);
 264         }
 265 }
 266
 267 void sipe_ews_autodiscover_start(struct sipe_core_private *sipe_private,
 268                                  sipe_ews_autodiscover_callback *callback,
 269                                  gpointer callback_data)
 270 {
 271         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
 272
 273         if (sea->completed) {
 274                 (*callback)(sipe_private, sea->data, callback_data);
 275         } else {
 276                 struct sipe_ews_autodiscover_cb *sea_cb = g_new(struct sipe_ews_autodiscover_cb, 1);
 277                 sea_cb->cb      = callback;
 278                 sea_cb->cb_data = callback_data;
 279                 sea->callbacks  = g_slist_prepend(sea->callbacks, sea_cb);
 280
 281                 if (!sea->method)
 282                         sipe_ews_autodiscover_request(sipe_private, TRUE);
 283         }
 284 }
 285
 286 void sipe_ews_autodiscover_init(struct sipe_core_private *sipe_private)
 287 {
 288         struct sipe_ews_autodiscover *sea = g_new0(struct sipe_ews_autodiscover, 1);
 289
 290         sea->email = g_strdup(sipe_private->email);
 291
 292         sipe_private->ews_autodiscover = sea;
 293 }
 294
 295 void sipe_ews_autodiscover_free(struct sipe_core_private *sipe_private)
 296 {
 297         struct sipe_ews_autodiscover *sea = sipe_private->ews_autodiscover;
 298         struct sipe_ews_autodiscover_data *ews_data = sea->data;
 299         sipe_ews_autodiscover_complete(sipe_private, NULL);
 300         if (ews_data) {
 301                 g_free((gchar *)ews_data->as_url);
 302                 g_free((gchar *)ews_data->ews_url);
 303                 g_free((gchar *)ews_data->legacy_dn);
 304                 g_free((gchar *)ews_data->oab_url);
 305                 g_free((gchar *)ews_data->oof_url);
 306                 g_free(ews_data);
 307         }
 308         g_free(sea->email);
 309         g_free(sea);
 310 }
 311
 312 /*
 313   Local Variables:
 314   mode: c
 315   c-file-style: "bsd"
 316   indent-tabs-mode: t
 317   tab-width: 8
 318   End:
 319 */