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#include <cassert>
#include "resip/dum/DumFeature.hxx"
#include "resip/dum/DumFeatureChain.hxx"
#include "resip/dum/DialogUsageManager.hxx"
#include "resip/dum/TargetCommand.hxx"
#include "resip/dum/WsCookieAuthManager.hxx"
#include "resip/stack/Helper.hxx"
#include "rutil/Logger.hxx"
#include "rutil/WinLeakCheck.hxx"
#define RESIPROCATE_SUBSYSTEM Subsystem::DUM
using namespace resip;
using namespace std;
WsCookieAuthManager::WsCookieAuthManager(DialogUsageManager& dum, TargetCommand::Target& target) :
DumFeature(dum, target)
{
}
WsCookieAuthManager::~WsCookieAuthManager()
{
InfoLog(<< "~WsCookieAuthManager");
}
// !bwc! We absolutely, positively, MUST NOT throw here. This is because in
// DialogUsageManager::process(), we do not know if a DumFeature has taken
// ownership of msg until we get a return. If we throw, the ownership of msg
// is unknown. This is unacceptable.
DumFeature::ProcessingResult
WsCookieAuthManager::process(Message* msg)
{
SipMessage* sipMessage = dynamic_cast<SipMessage*>(msg);
if (sipMessage)
{
//!dcm! -- unecessary happens in handle
switch ( handle(sipMessage) )
{
case WsCookieAuthManager::Rejected:
InfoLog(<< "WsCookieAuth rejected request " << sipMessage->brief());
return DumFeature::ChainDoneAndEventDone;
default: // includes Authorized, Skipped
return DumFeature::FeatureDone;
}
}
// Catch-all (handles something that was not a SipMessage)
return FeatureDone;
}
bool
WsCookieAuthManager::cookieUriMatch(const resip::Uri &first, const resip::Uri &second)
{
return(
(isEqualNoCase(first.user(), second.user()) || first.user() == "*") &&
(isEqualNoCase(first.host(), second.host()) || first.host() == "*")
);
}
bool
WsCookieAuthManager::authorizedForThisIdentity(
const MethodTypes method,
const WsCookieContext &wsCookieContext,
const resip::Uri &fromUri,
const resip::Uri &toUri)
{
if(difftime(wsCookieContext.getExpiresTime(), time(NULL)) < 0)
{
WarningLog(<< "Received expired cookie");
return false;
}
Uri wsFromUri = wsCookieContext.getWsFromUri();
Uri wsDestUri = wsCookieContext.getWsDestUri();
if(cookieUriMatch(wsFromUri, fromUri))
{
DebugLog(<< "Matched cookie source URI field" << wsFromUri << " against request From header field URI " << fromUri);
// When registering, "From" URI == "To" URI, so we can ignore the
// "To" URI restriction from the cookie when processing REGISTER
if(method == REGISTER && isEqualNoCase(fromUri.user(), toUri.user()) && isEqualNoCase(fromUri.host(), toUri.host()))
{
return true;
}
if(cookieUriMatch(wsDestUri, toUri))
{
DebugLog(<< "Matched cookie destination URI field" << wsDestUri << " against request To header field URI " << toUri);
return true;
}
}
// catch-all: access denied
return false;
}
// return true if request has been consumed
WsCookieAuthManager::Result
WsCookieAuthManager::handle(SipMessage* sipMessage)
{
// Only check message coming over WebSockets
if(!isWebSocket(sipMessage->getReceivedTransport()->transport()))
{
return Skipped;
}
//InfoLog( << "trying to do auth" );
if (!sipMessage->isRequest() ||
sipMessage->header(h_RequestLine).method() == ACK ||
sipMessage->header(h_RequestLine).method() == CANCEL)
{
// Do not inspect ACKs or CANCELs
return Skipped;
}
if(!sipMessage->header(h_From).isWellFormed() ||
sipMessage->header(h_From).isAllContacts() )
{
InfoLog(<<"Malformed From header: cannot verify against cookie. Rejecting.");
SharedPtr<SipMessage> response(new SipMessage);
Helper::makeResponse(*response, *sipMessage, 400, "Malformed From header");
mDum.send(response);
return Rejected;
}
const WsCookieContext &wsCookieContext = *(sipMessage->getWsCookieContext());
if (mDum.isMyDomain(sipMessage->header(h_From).uri().host()))
{
if (requiresAuthorization(*sipMessage))
{
if(authorizedForThisIdentity(sipMessage->header(h_RequestLine).method(), wsCookieContext, sipMessage->header(h_From).uri(), sipMessage->header(h_To).uri()))
{
return Authorized;
}
SharedPtr<SipMessage> response(new SipMessage);
Helper::makeResponse(*response, *sipMessage, 403, "Cookie-based authorization failed");
mDum.send(response);
return Rejected;
}
else
{
return Skipped;
}
}
else
{
SharedPtr<SipMessage> response(new SipMessage);
Helper::makeResponse(*response, *sipMessage, 403, "Cookie-based authorization failed");
mDum.send(response);
return Rejected;
}
InfoLog(<< "Skipping some message that we didn't explicitly handle");
return Skipped;
}
bool
WsCookieAuthManager::requiresAuthorization(const SipMessage& msg)
{
// everything must be authorized, over-ride this method
// to implement some other policy
return true;
}
/* ====================================================================
* BSD License
*
* Copyright (c) 2013 Catalin Constantin Usurelu All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. Neither the name of the author(s) nor the names of any contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* ====================================================================
*
*/
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