src/sipe-sign.c

   1 /*
   2  * @file sipe-sign.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2008 Novell, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  21  */
  22
  23 #include <glib.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include <ctype.h>
  28 #ifndef _WIN32
  29 #include <et/com_err.h>
  30 #else
  31 #include <protocols/zephyr/com_err.h>
  32 #include "internal.h"
  33 #endif
  34 #include "debug.h"
  35 #include "util.h"
  36
  37 #include "sipe-sign.h"
  38
  39 static gchar * const empty_string = "";
  40
  41 void sipmsg_breakdown_parse(struct sipmsg_breakdown * msg, gchar * realm, gchar * target)
  42 {
  43         gchar * hdr;
  44         if (msg == NULL || msg->msg == NULL) {
  45                 purple_debug(PURPLE_DEBUG_MISC, "sipmsg_breakdown_parse msg or msg->msg is NULL", "\n");
  46                 return;
  47         }
  48
  49
  50         msg->rand = msg->num = msg->realm = msg->target_name = msg->call_id =
  51                 msg->cseq = msg->from_url = msg->from_tag = msg->to_tag = msg->expires = empty_string;
  52
  53         if ((hdr = sipmsg_find_header(msg->msg, "Proxy-Authorization")) ||
  54             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authenticate")) ||
  55             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authentication-Info")) ||
  56             (hdr = sipmsg_find_header(msg->msg, "Authentication-Info")) ) {
  57                 msg->rand   = sipmsg_find_part_of_header(hdr, "rand=\"", "\"", empty_string);
  58                 msg->num    = sipmsg_find_part_of_header(hdr, "num=\"", "\"", empty_string);
  59                 msg->realm  = sipmsg_find_part_of_header(hdr, "realm=\"", "\"", empty_string);
  60                 msg->target_name = sipmsg_find_part_of_header(hdr, "targetname=\"", "\"", empty_string);
  61         } else {
  62                 msg->realm = g_strdup(realm);
  63                 msg->target_name = g_strdup(target);
  64         }
  65
  66         msg->call_id = sipmsg_find_header(msg->msg, "Call-ID");
  67
  68         hdr = sipmsg_find_header(msg->msg, "CSeq");
  69         if (NULL != hdr) {
  70                 msg->cseq = sipmsg_find_part_of_header(hdr, NULL, " ", empty_string);
  71         }
  72
  73         hdr = sipmsg_find_header(msg->msg, "From");
  74         if (NULL != hdr) {
  75                 msg->from_url = sipmsg_find_part_of_header(hdr, "<", ">", empty_string);
  76                 msg->from_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  77         }
  78
  79         hdr = sipmsg_find_header(msg->msg, "To");
  80         if (NULL != hdr) {
  81                 msg->to_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  82         }
  83
  84         msg->expires = sipmsg_find_header(msg->msg, "Expires");
  85 }
  86
  87 void
  88 sipmsg_breakdown_free(struct sipmsg_breakdown * msg)
  89 {
  90         if (msg->rand != empty_string)
  91                 g_free(msg->rand);
  92         if (msg->num != empty_string)
  93                 g_free(msg->num);
  94         if (msg->realm != empty_string)
  95                 g_free(msg->realm);
  96         if (msg->target_name != empty_string)
  97                 g_free(msg->target_name);
  98
  99         // straight from header
 100         //g_free(msg->call_id);
 101
 102         if (msg->cseq != empty_string)
 103                 g_free(msg->cseq);
 104         if (msg->from_url != empty_string)
 105                 g_free(msg->from_url);
 106         if (msg->from_tag != empty_string)
 107                 g_free(msg->from_tag);
 108         if (msg->to_tag != empty_string)
 109                 g_free(msg->to_tag);
 110
 111         // straight from header
 112         //g_free (msg->expires);
 113 }
 114
 115 gchar *
 116 sipmsg_breakdown_get_string(struct sipmsg_breakdown * msgbd)
 117 {
 118         gchar *response_str;
 119         gchar *msg;
 120         if (msgbd->realm == empty_string || msgbd->realm == NULL) {
 121                 purple_debug(PURPLE_DEBUG_MISC, "sipe", "realm NULL, so returning NULL signature string\n");
 122                 return NULL;
 123         }
 124
 125         response_str = msgbd->msg->response != 0 ? g_strdup_printf("<%d>", msgbd->msg->response) : empty_string;
 126         msg = g_strdup_printf(
 127                 "<%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s>" // 1 - 11
 128                 "<%s>%s", // 12 - 13
 129                 "NTLM", msgbd->rand, msgbd->num, msgbd->realm, msgbd->target_name, msgbd->call_id, msgbd->cseq,
 130                 msgbd->msg->method, msgbd->from_url, msgbd->from_tag, msgbd->to_tag,
 131                 msgbd->expires ? msgbd->expires : empty_string, response_str
 132         );
 133
 134         if (response_str != empty_string) {
 135                 g_free(response_str);
 136         }
 137
 138         return msg;
 139 }