src/core/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
  26 #include "debug.h"
  27
  28 #include "sipe-sign.h"
  29
  30 static gchar * const empty_string = "";
  31
  32 void sipmsg_breakdown_parse(struct sipmsg_breakdown * msg, gchar * realm, gchar * target)
  33 {
  34         const gchar * hdr;
  35         if (msg == NULL || msg->msg == NULL) {
  36                 purple_debug(PURPLE_DEBUG_MISC, "sipmsg_breakdown_parse msg or msg->msg is NULL", "\n");
  37                 return;
  38         }
  39
  40         msg->rand = msg->num = msg->realm = msg->target_name =
  41                 msg->cseq = msg->from_url = msg->from_tag = msg->to_url = msg->to_tag =
  42                 msg->p_assertet_identity_sip_uri = msg->p_assertet_identity_tel_uri = empty_string;
  43         msg->call_id = msg->expires = empty_string;
  44
  45         if ((hdr = sipmsg_find_header(msg->msg, "Proxy-Authorization")) ||
  46             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authenticate")) ||
  47             (hdr = sipmsg_find_header(msg->msg, "Proxy-Authentication-Info")) ||
  48             (hdr = sipmsg_find_header(msg->msg, "Authentication-Info")) ) {
  49                 msg->protocol = sipmsg_find_part_of_header(hdr, NULL, " ", empty_string);
  50                 msg->rand   = sipmsg_find_part_of_header(hdr, "rand=\"", "\"", empty_string);
  51                 msg->num    = sipmsg_find_part_of_header(hdr, "num=\"", "\"", empty_string);
  52                 msg->realm  = sipmsg_find_part_of_header(hdr, "realm=\"", "\"", empty_string);
  53                 msg->target_name = sipmsg_find_part_of_header(hdr, "targetname=\"", "\"", empty_string);
  54         } else {
  55                 msg->protocol = strstr(target, "sip/") ? g_strdup("Kerberos") : g_strdup("NTLM");
  56                 msg->realm = g_strdup(realm);
  57                 msg->target_name = g_strdup(target);
  58         }
  59
  60         msg->call_id = sipmsg_find_header(msg->msg, "Call-ID");
  61
  62         hdr = sipmsg_find_header(msg->msg, "CSeq");
  63         if (NULL != hdr) {
  64                 msg->cseq = sipmsg_find_part_of_header(hdr, NULL, " ", empty_string);
  65         }
  66
  67         hdr = sipmsg_find_header(msg->msg, "From");
  68         if (NULL != hdr) {
  69                 msg->from_url = sipmsg_find_part_of_header(hdr, "<", ">", empty_string);
  70                 msg->from_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  71         }
  72
  73         hdr = sipmsg_find_header(msg->msg, "To");
  74         if (NULL != hdr) {
  75                 msg->to_url = sipmsg_find_part_of_header(hdr, "<", ">", empty_string);
  76                 msg->to_tag = sipmsg_find_part_of_header(hdr, ";tag=", ";", empty_string);
  77         }
  78         /*
  79            P-Asserted-Identity: "Cullen Jennings" <sip:fluffy@cisco.com>
  80            P-Asserted-Identity: tel:+14085264000
  81         */
  82         hdr = sipmsg_find_header(msg->msg, "P-Asserted-Identity");
  83         if (NULL == hdr) {
  84                 hdr = sipmsg_find_header(msg->msg, "P-Preferred-Identity");
  85         }
  86         if (NULL != hdr) {
  87                 gchar *tmp = sipmsg_find_part_of_header(hdr, "<", ">", empty_string);
  88                 if (g_str_has_prefix(tmp, "sip:")) {
  89                         msg->p_assertet_identity_sip_uri = tmp;
  90                 } else if (g_str_has_prefix(tmp, "tel:")){
  91                         msg->p_assertet_identity_tel_uri = tmp;
  92                 } else {
  93                         g_free(tmp);
  94                 }
  95         }
  96
  97         msg->expires = sipmsg_find_header(msg->msg, "Expires");
  98 }
  99
 100 void
 101 sipmsg_breakdown_free(struct sipmsg_breakdown * msg)
 102 {
 103         if (msg->protocol != empty_string)
 104                 g_free(msg->protocol);
 105         if (msg->rand != empty_string)
 106                 g_free(msg->rand);
 107         if (msg->num != empty_string)
 108                 g_free(msg->num);
 109         if (msg->realm != empty_string)
 110                 g_free(msg->realm);
 111         if (msg->target_name != empty_string)
 112                 g_free(msg->target_name);
 113
 114         // straight from header
 115         //g_free(msg->call_id);
 116
 117         if (msg->cseq != empty_string)
 118                 g_free(msg->cseq);
 119         if (msg->from_url != empty_string)
 120                 g_free(msg->from_url);
 121         if (msg->from_tag != empty_string)
 122                 g_free(msg->from_tag);
 123         if (msg->to_url != empty_string)
 124                 g_free(msg->to_url);
 125         if (msg->to_tag != empty_string)
 126                 g_free(msg->to_tag);
 127
 128         if (msg->p_assertet_identity_sip_uri != empty_string)
 129                 g_free(msg->p_assertet_identity_sip_uri);
 130         if (msg->p_assertet_identity_tel_uri != empty_string)
 131                 g_free(msg->p_assertet_identity_tel_uri);
 132
 133         // straight from header
 134         //g_free (msg->expires);
 135 }
 136
 137 gchar *
 138 sipmsg_breakdown_get_string(int version,
 139                             struct sipmsg_breakdown * msgbd)
 140 {
 141         gchar *response_str;
 142         gchar *msg;
 143         if (msgbd->realm == empty_string || msgbd->realm == NULL) {
 144                 purple_debug(PURPLE_DEBUG_MISC, "sipe", "realm NULL, so returning NULL signature string\n");
 145                 return NULL;
 146         }
 147
 148         response_str = msgbd->msg->response != 0 ? g_strdup_printf("<%d>", msgbd->msg->response) : empty_string;
 149         if (version < 3) {
 150                 msg = g_strdup_printf(
 151                         "<%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s>" // 1 - 11
 152                         "<%s>%s", // 12 - 13
 153                         msgbd->protocol, msgbd->rand, msgbd->num, msgbd->realm, msgbd->target_name, msgbd->call_id, msgbd->cseq,
 154                         msgbd->msg->method, msgbd->from_url, msgbd->from_tag, msgbd->to_tag,
 155                         msgbd->expires ? msgbd->expires : empty_string, response_str
 156                 );
 157         } else {
 158                 msg = g_strdup_printf(
 159                         "<%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s><%s>" // 1 - 14
 160                         "<%s>%s", // 15 - 16
 161                         msgbd->protocol, msgbd->rand, msgbd->num, msgbd->realm, msgbd->target_name, msgbd->call_id, msgbd->cseq,
 162                         msgbd->msg->method, msgbd->from_url, msgbd->from_tag, msgbd->to_url, msgbd->to_tag,
 163                         msgbd->p_assertet_identity_sip_uri, msgbd->p_assertet_identity_tel_uri,
 164                         msgbd->expires ? msgbd->expires : empty_string, response_str
 165                 );
 166         }
 167
 168         if (response_str != empty_string) {
 169                 g_free(response_str);
 170         }
 171
 172         return msg;
 173 }
 174
 175 /*
 176   Local Variables:
 177   mode: c
 178   c-file-style: "bsd"
 179   indent-tabs-mode: t
 180   tab-width: 8
 181   End:
 182 */