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 <string.h>
  25 #ifdef _WIN32
  26 #include "internal.h"
  27 #endif
  28 #include "debug.h"
  29
  30 #include "sipe-sign.h"
  31
  32 static gchar * const empty_string = "";
  33
  34 void sipmsg_breakdown_parse(struct sipmsg_breakdown * msg, gchar * realm, gchar * target)
  35 {
  36         gchar * hdr;
  37         if (msg == NULL || msg->msg == NULL) {
  38                 purple_debug(PURPLE_DEBUG_MISC, "sipmsg_breakdown_parse msg or msg->msg is NULL", "\n");
  39                 return;
  40         }
  41
  42
  43         msg->rand = msg->num = msg->realm = msg->target_name = msg->call_id =
  44                 msg->cseq = msg->from_url = msg->from_tag = msg->to_tag = msg->expires = empty_string;
  45
  46         if ((hdr = sipmsg_find_header(msg->msg, "Proxy-Authorization")) ||
  47             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authenticate")) ||
  48             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authentication-Info")) ||
  49             (hdr = sipmsg_find_header(msg->msg, "Authentication-Info")) ) {
  50                 msg->protocol = sipmsg_find_part_of_header(hdr, NULL, " ", empty_string);
  51                 msg->rand   = sipmsg_find_part_of_header(hdr, "rand=\"", "\"", empty_string);
  52                 msg->num    = sipmsg_find_part_of_header(hdr, "num=\"", "\"", empty_string);
  53                 msg->realm  = sipmsg_find_part_of_header(hdr, "realm=\"", "\"", empty_string);
  54                 msg->target_name = sipmsg_find_part_of_header(hdr, "targetname=\"", "\"", empty_string);
  55         } else {
  56                 msg->protocol = strstr(target, "sip/") ? g_strdup("Kerberos") : g_strdup("NTLM");
  57                 msg->realm = g_strdup(realm);
  58                 msg->target_name = g_strdup(target);
  59         }
  60
  61         msg->call_id = sipmsg_find_header(msg->msg, "Call-ID");
  62
  63         hdr = sipmsg_find_header(msg->msg, "CSeq");
  64         if (NULL != hdr) {
  65                 msg->cseq = sipmsg_find_part_of_header(hdr, NULL, " ", empty_string);
  66         }
  67
  68         hdr = sipmsg_find_header(msg->msg, "From");
  69         if (NULL != hdr) {
  70                 msg->from_url = sipmsg_find_part_of_header(hdr, "<", ">", empty_string);
  71                 msg->from_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  72         }
  73
  74         hdr = sipmsg_find_header(msg->msg, "To");
  75         if (NULL != hdr) {
  76                 msg->to_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  77         }
  78
  79         msg->expires = sipmsg_find_header(msg->msg, "Expires");
  80 }
  81
  82 void
  83 sipmsg_breakdown_free(struct sipmsg_breakdown * msg)
  84 {
  85         if (msg->protocol != empty_string)
  86                 g_free(msg->protocol);
  87         if (msg->rand != empty_string)
  88                 g_free(msg->rand);
  89         if (msg->num != empty_string)
  90                 g_free(msg->num);
  91         if (msg->realm != empty_string)
  92                 g_free(msg->realm);
  93         if (msg->target_name != empty_string)
  94                 g_free(msg->target_name);
  95
  96         // straight from header
  97         //g_free(msg->call_id);
  98
  99         if (msg->cseq != empty_string)
 100                 g_free(msg->cseq);
 101         if (msg->from_url != empty_string)
 102                 g_free(msg->from_url);
 103         if (msg->from_tag != empty_string)
 104                 g_free(msg->from_tag);
 105         if (msg->to_tag != empty_string)
 106                 g_free(msg->to_tag);
 107
 108         // straight from header
 109         //g_free (msg->expires);
 110 }
 111
 112 gchar *
 113 sipmsg_breakdown_get_string(struct sipmsg_breakdown * msgbd)
 114 {
 115         gchar *response_str;
 116         gchar *msg;
 117         if (msgbd->realm == empty_string || msgbd->realm == NULL) {
 118                 purple_debug(PURPLE_DEBUG_MISC, "sipe", "realm NULL, so returning NULL signature string\n");
 119                 return NULL;
 120         }
 121
 122         response_str = msgbd->msg->response != 0 ? g_strdup_printf("<%d>", msgbd->msg->response) : empty_string;
 123         msg = g_strdup_printf(
 124                 "<%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s>" // 1 - 11
 125                 "<%s>%s", // 12 - 13
 126                 msgbd->protocol, msgbd->rand, msgbd->num, msgbd->realm, msgbd->target_name, msgbd->call_id, msgbd->cseq,
 127                 msgbd->msg->method, msgbd->from_url, msgbd->from_tag, msgbd->to_tag,
 128                 msgbd->expires ? msgbd->expires : empty_string, response_str
 129         );
 130
 131         if (response_str != empty_string) {
 132                 g_free(response_str);
 133         }
 134
 135         return msg;
 136 }