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gkauth.cxx
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gkauth.cxx
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//////////////////////////////////////////////////////////////////
//
// gkauth.cxx
//
// Copyright (c) 2001-2021, Jan Willamowius
//
// This work is published under the GNU Public License version 2 (GPLv2)
// see file COPYING for details.
// We also explicitly grant the right to link this code
// with the OpenH323/H323Plus and OpenSSL library.
//
//////////////////////////////////////////////////////////////////
#include "config.h"
#include <ptlib.h>
#include <h235.h>
#include <h323pdu.h>
#include <h235auth.h>
#include "gk_const.h"
#include "h323util.h"
#include "stl_supp.h"
#include "Toolkit.h"
#include "RasTbl.h"
#include "RasPDU.h"
#include "sigmsg.h"
#include "Routing.h"
#include "gkauth.h"
#if H323_H350
extern const char *H350Section;
#include <ptclib/pldap.h>
#include "h350/h350.h"
#endif // H323_H350
#ifdef HAS_H46018
#include <h460/h4601.h>
#endif
#ifdef P_SSL
#include <openssl/rand.h>
#endif // P_SSL
#include <ptclib/http.h>
#ifdef HAS_LIBCURL
#include <curl/curl.h>
#endif // HAS_LIBCURL
namespace {
const char* const GkAuthSectionName = "Gatekeeper::Auth";
}
using std::stable_sort;
using std::for_each;
using std::find_if;
using std::greater;
ARQAuthData::ARQAuthData(
/// an endpoint requesting admission
const endptr & ep,
/// call record matching this ARQ (if any)
const callptr & call
) : m_rejectReason(-1), m_callDurationLimit(-1),
m_requestingEP(ep), m_call(call), m_billingMode(-1),
m_proxyMode(CallRec::ProxyDetect),
m_clientAuthId(0)
{
}
ARQAuthData::ARQAuthData(const ARQAuthData & obj)
: m_rejectReason(obj.m_rejectReason),
m_callDurationLimit(obj.m_callDurationLimit),
m_requestingEP(obj.m_requestingEP), m_call(obj.m_call),
m_billingMode(obj.m_billingMode), m_routeToAlias(obj.m_routeToAlias),
m_destinationRoutes(obj.m_destinationRoutes), m_proxyMode(obj.m_proxyMode),
m_clientAuthId(0)
{
}
ARQAuthData & ARQAuthData::operator=(const ARQAuthData & obj)
{
if (this != &obj) {
m_rejectReason = obj.m_rejectReason;
m_callDurationLimit = obj.m_callDurationLimit;
m_requestingEP = obj.m_requestingEP;
m_call = obj.m_call;
m_billingMode = obj.m_billingMode;
m_proxyMode = obj.m_proxyMode;
m_clientAuthId = obj.m_clientAuthId;
m_routeToAlias = obj.m_routeToAlias;
m_destinationRoutes = obj.m_destinationRoutes;
}
return *this;
}
void ARQAuthData::SetRouteToAlias(const H225_ArrayOf_AliasAddress & alias)
{
m_routeToAlias = alias;
}
void ARQAuthData::SetRouteToAlias(const PString & alias, int tag)
{
m_routeToAlias.SetSize(1);
H323SetAliasAddress(alias, m_routeToAlias[0], tag);
}
SetupAuthData::SetupAuthData(
/// call associated with the message (if any)
const callptr & call,
/// is the Setup message from a registered endpoint
bool fromRegistered,
/// did the Setup come in over TLS
bool overTLS,
/// did the Setup come from a neighbor gatekeeper
bool fromNeighbor
) : m_rejectReason(-1), m_rejectCause(-1), m_callDurationLimit(-1),
m_call(call), m_fromRegistered(fromRegistered),
m_proxyMode(CallRec::ProxyDetect),
m_clientAuthId(0), m_overTLS(overTLS), m_fromNeighbor(fromNeighbor)
{
}
SetupAuthData::SetupAuthData(const SetupAuthData & obj)
: m_rejectReason(obj.m_rejectReason), m_rejectCause(obj.m_rejectCause),
m_callDurationLimit(obj.m_callDurationLimit), m_call(obj.m_call),
m_fromRegistered(obj.m_fromRegistered),
m_routeToAlias(obj.m_routeToAlias), m_destinationRoutes(obj.m_destinationRoutes),
m_proxyMode(obj.m_proxyMode), m_clientAuthId(0), m_overTLS(false),
m_fromNeighbor(obj.m_fromNeighbor)
{
}
SetupAuthData & SetupAuthData::operator=(const SetupAuthData & obj)
{
if (this != &obj) {
m_rejectReason = obj.m_rejectReason;
m_rejectCause = obj.m_rejectCause;
m_callDurationLimit = obj.m_callDurationLimit;
m_call = obj.m_call;
m_fromRegistered = obj.m_fromRegistered;
m_proxyMode = obj.m_proxyMode;
m_clientAuthId = obj.m_clientAuthId;
m_routeToAlias = obj.m_routeToAlias;
m_destinationRoutes = obj.m_destinationRoutes;
m_overTLS = obj.m_overTLS;
m_fromNeighbor = obj.m_fromNeighbor;
}
return *this;
}
SetupAuthData::~SetupAuthData()
{
}
void SetupAuthData::SetRouteToAlias(const H225_ArrayOf_AliasAddress & alias)
{
m_routeToAlias = alias;
}
void SetupAuthData::SetRouteToAlias(const PString & alias, int tag)
{
m_routeToAlias.SetSize(1);
H323SetAliasAddress(alias, m_routeToAlias[0], tag);
}
// class GkAuthenticator
GkAuthenticator::GkAuthenticator(
const char* name, /// a name for the module (to be used in the config file)
unsigned supportedRasChecks, /// RAS checks supported by this module
unsigned supportedMiscChecks /// non-RAS checks supported by this module
)
: NamedObject(name), m_defaultStatus(e_fail), m_controlFlag(e_Required),
m_enabledRasChecks(~0U), m_supportedRasChecks(supportedRasChecks),
m_enabledMiscChecks(~0U), m_supportedMiscChecks(supportedMiscChecks),
m_config(GkConfig())
{
const PStringArray control(m_config->GetString(GkAuthSectionName, name, "").Tokenise(";,"));
if (control.GetSize() > 0) {
const PString controlStr = control[0].Trim();
if (strcasecmp(name, "default") == 0)
m_controlFlag = e_Sufficient,
m_defaultStatus = Toolkit::AsBool(controlStr) ? e_ok : e_fail;
else if (controlStr *= "optional")
m_controlFlag = e_Optional, m_defaultStatus = e_next;
else if (controlStr *= "required")
m_controlFlag = e_Required, m_defaultStatus = e_fail;
else if (controlStr *= "sufficient")
m_controlFlag = e_Sufficient, m_defaultStatus = e_fail;
else if (controlStr *= "alternative")
m_controlFlag = e_Alternative, m_defaultStatus = e_next;
else
PTRACE(1, "GKAUTH\tInvalid control flag '" << controlStr
<< "' specified in the config for " << GetName());
} else
PTRACE(1, "GKAUTH\tNo control flag specified in the config for module '"
<< GetName() << '\'');
std::map<PString, unsigned> rasmap;
rasmap["GRQ"] = RasInfo<H225_GatekeeperRequest>::flag,
rasmap["RRQ"] = RasInfo<H225_RegistrationRequest>::flag,
rasmap["URQ"] = RasInfo<H225_UnregistrationRequest>::flag,
rasmap["ARQ"] = RasInfo<H225_AdmissionRequest>::flag,
rasmap["BRQ"] = RasInfo<H225_BandwidthRequest>::flag,
rasmap["DRQ"] = RasInfo<H225_DisengageRequest>::flag,
rasmap["LRQ"] = RasInfo<H225_LocationRequest>::flag,
rasmap["IRQ"] = RasInfo<H225_InfoRequest>::flag;
rasmap["RAI"] = RasInfo<H225_ResourcesAvailableIndicate>::flag;
std::map<PString, unsigned> miscmap;
miscmap["SETUP"] = e_Setup;
miscmap["SETUPUNREG"] = e_SetupUnreg;
miscmap["CONNECT"] = e_Connect;
miscmap["CALLPROCEEDING"] = e_CallProceeding;
miscmap["ALERTING"] = e_Alerting;
miscmap["INFORMATION"] = e_Information;
miscmap["RELEASECOMPLETE"] = e_ReleaseComplete;
miscmap["FACILITY"] = e_Facility;
miscmap["PROGRESS"] = e_Progress;
miscmap["EMPTY"] = e_Empty;
miscmap["STATUS"] = e_Status;
miscmap["STATUSINQUIRY"] = e_StatusEnquiry;
miscmap["SETUPACK"] = e_SetupAck;
miscmap["NOTIFY"] = e_Notify;
if (control.GetSize() > 1) {
m_enabledRasChecks = 0;
m_enabledMiscChecks = 0;
for (PINDEX i = 1; i < control.GetSize(); ++i) {
const PString checkStr = control[i].Trim().ToUpper();
if (rasmap.find(checkStr) != rasmap.end()) {
m_enabledRasChecks |= rasmap[checkStr];
if ((m_supportedRasChecks & rasmap[checkStr]) != rasmap[checkStr]) {
PTRACE(1, "GKAUTH\t" << GetName() << " does not support '"
<< control[i] << "' check");
}
} else if(miscmap.find(checkStr) != miscmap.end()) {
m_enabledMiscChecks |= miscmap[checkStr];
if ((m_supportedMiscChecks & miscmap[checkStr]) != miscmap[checkStr]) {
PTRACE(1, "GKAUTH\t" << GetName() << " does not support '"
<< control[i] << "' check");
}
} else {
PTRACE(1, "GKAUTH\tInvalid check flag '" << control[i]
<< "' specified in the config for " << GetName());
}
}
if ((m_enabledRasChecks & m_supportedRasChecks) == 0
&& (m_enabledMiscChecks & m_supportedMiscChecks) == 0) {
PTRACE(1, "GKAUTH\tNo check flags have been specified "
"in the config for " << GetName() << " - it will be disabled");
}
}
// convert bit flags to human readable names
PString rasFlagsStr, miscFlagsStr;
std::map<PString, unsigned>::const_iterator iter = rasmap.begin();
while (iter != rasmap.end()) {
if (m_enabledRasChecks & iter->second) {
if (!rasFlagsStr)
rasFlagsStr += ' ';
rasFlagsStr += iter->first;
}
++iter;
}
iter = miscmap.begin();
while (iter != miscmap.end()) {
if (m_enabledMiscChecks & iter->second) {
if (!miscFlagsStr)
miscFlagsStr += ' ';
miscFlagsStr += iter->first;
}
++iter;
}
if (rasFlagsStr.IsEmpty())
rasFlagsStr = "NONE";
if (miscFlagsStr.IsEmpty())
miscFlagsStr = "NONE";
PTRACE(1, "GKAUTH\t" << GetName() << " rule added to check RAS: "
<< rasFlagsStr << ", OTHER: " << miscFlagsStr);
m_h235Authenticators = NULL;
}
GkAuthenticator::~GkAuthenticator()
{
delete m_h235Authenticators;
PTRACE(1, "GKAUTH\t" << GetName() << " rule removed");
}
PString GkAuthenticator::StatusAsString(int status) const
{
switch(status)
{
case e_ok: return "accept";
case e_fail: return "reject";
case e_next: return "next";
}
return "invalid";
}
int GkAuthenticator::Check(RasPDU<H225_GatekeeperRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_GatekeeperRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(
/// a request to be authenticated
RasPDU<H225_RegistrationRequest> & /*request*/,
/// authorization data (reject reason, ...)
RRQAuthData & /*authData*/)
{
return IsRasCheckEnabled(RasInfo<H225_RegistrationRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_UnregistrationRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_UnregistrationRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(
/// a request to be authenticated
RasPDU<H225_AdmissionRequest> & /*req*/,
/// authorization data (call duration limit, reject reason, ...)
ARQAuthData & /*authData*/)
{
return IsRasCheckEnabled(RasInfo<H225_AdmissionRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_BandwidthRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_BandwidthRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_DisengageRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_DisengageRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_LocationRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_LocationRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_InfoRequest> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_InfoRequest>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(RasPDU<H225_ResourcesAvailableIndicate> &, unsigned &)
{
return IsRasCheckEnabled(RasInfo<H225_ResourcesAvailableIndicate>::flag)
? m_defaultStatus : e_next;
}
int GkAuthenticator::Check(
SetupMsg & /*setup*/,
/// authorization data (call duration limit, reject reason, ...)
SetupAuthData & /*authData*/)
{
return (IsMiscCheckEnabled(e_Setup) || IsMiscCheckEnabled(e_SetupUnreg))
? m_defaultStatus : e_next;
}
int GkAuthenticator::AuthEnum(unsigned msgCode) const
{
switch (msgCode) {
case Q931::AlertingMsg:
return e_Alerting;
case Q931::CallProceedingMsg:
return e_CallProceeding;
case Q931::ConnectMsg:
return e_Connect;
case Q931::ProgressMsg:
return e_Progress;
case Q931::SetupMsg:
return e_Setup;
case Q931::SetupAckMsg:
return e_SetupAck;
case Q931::ReleaseCompleteMsg:
return e_ReleaseComplete;
case Q931::InformationMsg:
return e_Information;
case Q931::NotifyMsg:
return e_Notify;
case Q931::StatusMsg:
return e_Status;
case Q931::StatusEnquiryMsg:
return e_StatusEnquiry;
case Q931::FacilityMsg:
return e_Facility;
default:
return -1;
}
}
// this method is called for authentication checks not implemented by individual authenticators
int GkAuthenticator::Check(
Q931 & msg,
/// authorization data
Q931AuthData & /*authData*/)
{
int code = AuthEnum(msg.GetMessageType());
if (code > 0) {
return IsMiscCheckEnabled(e_Facility) ? m_defaultStatus : e_next;
} else {
return e_next;
}
}
bool GkAuthenticator::IsH235Capability(
/// authentication mechanism
const H235_AuthenticationMechanism & mechanism,
/// algorithm OID for the given authentication mechanism
const PASN_ObjectId & algorithmOID
) const
{
if (m_h235Authenticators) {
for (PINDEX i = 0; i < m_h235Authenticators->GetSize(); i++) {
if ((*m_h235Authenticators)[i].IsCapability(mechanism, algorithmOID)) {
return true;
}
}
}
return false;
}
bool GkAuthenticator::IsH235Capable() const
{
return m_h235Authenticators && m_h235Authenticators->GetSize() > 0;
}
void GkAuthenticator::AppendH235Authenticator(
H235Authenticator * h235Auth /// H.235 authenticator to append
)
{
if (h235Auth) {
if (m_h235Authenticators == NULL)
m_h235Authenticators = new H235Authenticators();
m_h235Authenticators->Append(h235Auth);
}
}
PString GkAuthenticator::GetUsername(
/// RRQ message with additional data
const RasPDU<H225_RegistrationRequest> & request
) const
{
const H225_RegistrationRequest & rrq = request;
PString username;
if (rrq.HasOptionalField(H225_RegistrationRequest::e_terminalAlias))
username = GetBestAliasAddressString(rrq.m_terminalAlias, false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (username.IsEmpty()) {
PIPSocket::Address addr;
if (rrq.m_callSignalAddress.GetSize() > 0
&& GetIPFromTransportAddr(rrq.m_callSignalAddress[0], addr)
&& addr.IsValid())
username = addr.AsString();
else if (rrq.m_rasAddress.GetSize() > 0
&& GetIPFromTransportAddr(rrq.m_rasAddress[0], addr)
&& addr.IsValid())
username = addr.AsString();
}
return username;
}
PString GkAuthenticator::GetUsername(
/// ARQ message with additional data
const RasPDU<H225_AdmissionRequest> & request,
/// additional data
ARQAuthData & authData
) const
{
const H225_AdmissionRequest& arq = request;
const bool hasCall = authData.m_call.operator->() != NULL;
PString username;
/// try to find h323_ID, email_ID or url_ID to use for User-Name
if (!arq.m_answerCall)
username = GetBestAliasAddressString(arq.m_srcInfo, true,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID)
);
else if (hasCall)
username = GetBestAliasAddressString(authData.m_call->GetSourceAddress(), true,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (authData.m_requestingEP && (username.IsEmpty()
|| FindAlias(authData.m_requestingEP->GetAliases(), username) == P_MAX_INDEX))
username = GetBestAliasAddressString(authData.m_requestingEP->GetAliases(), false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
/// if no h323_ID, email_ID or url_ID has been found, try to find any alias
if (username.IsEmpty()) {
if (!arq.m_answerCall) {
username = GetBestAliasAddressString(arq.m_srcInfo, false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
} else if (hasCall) {
username = GetBestAliasAddressString(
authData.m_call->GetSourceAddress(), true,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
}
}
if (username.IsEmpty()) {
PIPSocket::Address addr;
if (arq.HasOptionalField(H225_AdmissionRequest::e_srcCallSignalAddress)
&& GetIPFromTransportAddr(arq.m_srcCallSignalAddress, addr)
&& addr.IsValid())
username = addr.AsString();
else if (authData.m_requestingEP
&& GetIPFromTransportAddr(authData.m_requestingEP->GetCallSignalAddress(), addr)
&& addr.IsValid())
username = addr.AsString();
}
return username;
}
PString GkAuthenticator::GetUsername(
const SetupMsg & setup,
/// additional data
SetupAuthData & authData
) const
{
const bool hasCall = authData.m_call.operator->() != NULL;
PString username;
endptr callingEP;
Q931& q931pdu = setup.GetQ931();
H225_Setup_UUIE &setupBody = setup.GetUUIEBody();
if (hasCall)
callingEP = authData.m_call->GetCallingParty();
if (setupBody.HasOptionalField(H225_Setup_UUIE::e_sourceAddress)) {
username = GetBestAliasAddressString(setupBody.m_sourceAddress, true,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID)
);
if (!username && callingEP
&& FindAlias(callingEP->GetAliases(), username) == P_MAX_INDEX)
username = PString::Empty();
}
if (username.IsEmpty() && hasCall) {
username = GetBestAliasAddressString(
authData.m_call->GetSourceAddress(), true,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (!username && callingEP
&& FindAlias(callingEP->GetAliases(), username) == P_MAX_INDEX)
username = PString::Empty();
}
if (username.IsEmpty() && callingEP)
username = GetBestAliasAddressString(callingEP->GetAliases(), false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (username.IsEmpty() && hasCall)
username = GetBestAliasAddressString(
authData.m_call->GetSourceAddress(), false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (username.IsEmpty() && setupBody.HasOptionalField(H225_Setup_UUIE::e_sourceAddress))
username = GetBestAliasAddressString(setupBody.m_sourceAddress, false,
AliasAddressTagMask(H225_AliasAddress::e_h323_ID),
AliasAddressTagMask(H225_AliasAddress::e_email_ID)
| AliasAddressTagMask(H225_AliasAddress::e_url_ID));
if (username.IsEmpty())
q931pdu.GetCallingPartyNumber(username);
if (username.IsEmpty()) {
PIPSocket::Address addr(0);
WORD port = 0;
bool addrValid = false;
if (hasCall)
addrValid = authData.m_call->GetSrcSignalAddr(addr, port) && addr.IsValid();
if (!addrValid && setupBody.HasOptionalField(H225_Setup_UUIE::e_sourceCallSignalAddress) && setupBody.m_sourceCallSignalAddress.IsValid())
addrValid = GetIPFromTransportAddr(setupBody.m_sourceCallSignalAddress, addr)
&& addr.IsValid();
if (!addrValid && callingEP)
addrValid = GetIPFromTransportAddr(callingEP->GetCallSignalAddress(), addr)
&& addr.IsValid();
if (addrValid)
username = addr.AsString();
}
return username;
}
PString GkAuthenticator::GetCallingStationId(
/// RRQ message
const RasPDU<H225_RegistrationRequest> & request,
/// additional data
RRQAuthData & /* authData */
) const
{
PString id;
const H225_RegistrationRequest & rrq = request;
if (rrq.HasOptionalField(H225_RegistrationRequest::e_terminalAlias)) {
id = GetBestAliasAddressString(rrq.m_terminalAlias, false,
AliasAddressTagMask(H225_AliasAddress::e_dialedDigits)
| AliasAddressTagMask(H225_AliasAddress::e_partyNumber));
};
return id;
}
PString GkAuthenticator::GetCallingStationId(
/// ARQ message with additional data
const RasPDU<H225_AdmissionRequest> & /*request*/,
/// additional data
ARQAuthData & authData
) const
{
return authData.m_callingStationId;
}
PString GkAuthenticator::GetCallingStationId(
const SetupMsg & /*setup*/,
/// additional data
SetupAuthData & authData
) const
{
return authData.m_callingStationId;
}
PString GkAuthenticator::GetCalledStationId(
/// ARQ message with additional data
const RasPDU<H225_AdmissionRequest> & /*request*/,
/// additional data
ARQAuthData & authData
) const
{
return authData.m_calledStationId;
}
PString GkAuthenticator::GetCalledStationId(
const SetupMsg & /*setup*/,
/// additional data
SetupAuthData & authData
) const
{
return authData.m_calledStationId;
}
PString GkAuthenticator::GetDialedNumber(
/// ARQ message with additional data
const RasPDU<H225_AdmissionRequest> & /*request*/,
/// additional data
ARQAuthData & authData
) const
{
return authData.m_dialedNumber;
}
PString GkAuthenticator::GetDialedNumber(
const SetupMsg & /*setup*/,
/// additional data
SetupAuthData & authData
) const
{
return authData.m_dialedNumber;
}
PString GkAuthenticator::GetInfo()
{
return "No information available\r\n";
}
PString GkAuthenticator::ReplaceAuthParams(
/// parametrized string
const PString & str,
/// parameter values
const std::map<PString, PString> & params
)
{
PString finalStr((const char*)str);
PINDEX len = finalStr.GetLength();
PINDEX pos = 0;
while (pos != P_MAX_INDEX && pos < len) {
pos = finalStr.Find('%', pos);
if (pos == P_MAX_INDEX || pos++ == P_MAX_INDEX)
break;
if (pos >= len) // strings ending with '%' - special case
break;
const char c = finalStr[pos]; // char next after '%'
if (c == '%') { // replace %% with %
finalStr.Delete(pos, 1);
len--;
} else if (c == '{') { // escaped syntax (%{Name})
const PINDEX closingBrace = finalStr.Find('}', ++pos);
if (closingBrace != P_MAX_INDEX) {
const PINDEX paramLen = closingBrace - pos;
std::map<PString, PString>::const_iterator i = params.find(finalStr.Mid(pos, paramLen));
if (i != params.end()) {
const PINDEX escapedLen = (i->second).GetLength();
finalStr.Splice(i->second, pos - 2, paramLen + 3);
len = len + escapedLen - paramLen - 3;
pos = pos - 2 + escapedLen;
} else {
// leave unknown placeholders intact so a 2nd stage can replace them
}
}
} else { // simple syntax (%c)
std::map<PString, PString>::const_iterator i = params.find(c);
if (i != params.end()) {
const PINDEX escapedLen = (i->second).GetLength();
finalStr.Splice(i->second, pos - 1, 2);
len = len + escapedLen - 2;
pos = pos - 1 + escapedLen;
} else {
// leave unknown placeholders intact so a 2nd stage can replace them
}
}
}
return finalStr;
}
// class GkAuthenticatorList
GkAuthenticatorList::GkAuthenticatorList()
{
// TODO: should we move this into OnReload() so it can be dynamically changed ?
PFactory<H235Authenticator>::KeyList_T keyList = PFactory<H235Authenticator>::GetKeyList();
PFactory<H235Authenticator>::KeyList_T::const_iterator r;
// if a global list of authenticators is configured, use it in the priority order supplied
PStringList authlist = Toolkit::Instance()->GetAuthenticatorList();
if (authlist.GetSize() > 0) {
for (PINDEX i = 0; i < authlist.GetSize(); ++i) {
for (r = keyList.begin(); r != keyList.end(); ++r) {
H235Authenticator * Auth = PFactory<H235Authenticator>::CreateInstance(*r);
if (Auth && (PCaselessString(Auth->GetName()) == authlist[i])) {
m_h235authenticators.Append(Auth);
} else {
delete Auth;
}
}
}
} else {
for (r = keyList.begin(); r != keyList.end(); ++r) {
H235Authenticator * Auth = PFactory<H235Authenticator>::CreateInstance(*r);
if (Auth) {
if ((Auth->GetApplication() == H235Authenticator::EPAuthentication)
||(Auth->GetApplication() == H235Authenticator::GKAdmission)
||(Auth->GetApplication() == H235Authenticator::AnyApplication) ) {
m_h235authenticators.Append(Auth);
} else {
delete Auth;
}
}
}
}
}
GkAuthenticatorList::~GkAuthenticatorList()
{
WriteLock lock(m_reloadMutex);
DeleteObjectsInContainer(m_authenticators);
m_authenticators.clear();
}
void GkAuthenticatorList::OnReload()
{
// lock here to prevent too early authenticator destruction
// from another thread
WriteLock lock(m_reloadMutex);
// first destroy old authenticators
DeleteObjectsInContainer(m_authenticators);
m_authenticators.clear();
std::list<GkAuthenticator*> authenticators;
const PStringArray authRules = GkConfig()->GetKeys(GkAuthSectionName);
for (PINDEX r = 0; r < authRules.GetSize(); r++) {
GkAuthenticator * auth = Factory<GkAuthenticator>::Create(authRules[r]);
if (auth) {
authenticators.push_back(auth);
}
}
m_authenticators = authenticators;
}
void GkAuthenticatorList::SelectH235Capability(
const H225_GatekeeperRequest & grq,
H225_GatekeeperConfirm & gcf)
{
ReadLock lock(m_reloadMutex);
if (m_authenticators.empty()) {
return;
}
// if GRQ does not contain a list of authentication mechanisms simply return
if (!(grq.HasOptionalField(H225_GatekeeperRequest::e_authenticationCapability)
&& grq.HasOptionalField(H225_GatekeeperRequest::e_algorithmOIDs)
&& grq.m_authenticationCapability.GetSize() > 0
&& grq.m_algorithmOIDs.GetSize() > 0)) {
return;
}
for (PINDEX auth = 0; auth < m_h235authenticators.GetSize(); auth++) {
for (PINDEX cap = 0; cap < grq.m_authenticationCapability.GetSize(); cap++) {
for (PINDEX alg = 0; alg < grq.m_algorithmOIDs.GetSize(); alg++) {
if (m_h235authenticators[auth].IsCapability(grq.m_authenticationCapability[cap], grq.m_algorithmOIDs[alg])) {
std::list<GkAuthenticator*>::const_iterator iter = m_authenticators.begin();
while (iter != m_authenticators.end()) {
GkAuthenticator* gkauth = *iter++;
if (gkauth->IsH235Capable() && gkauth->IsH235Capability(grq.m_authenticationCapability[cap], grq.m_algorithmOIDs[alg])) {
PTRACE(4, "GKAUTH\tGRQ accepted on " << H323TransportAddress(gcf.m_rasAddress) << " for " << H323TransportAddress(grq.m_rasAddress)
<< " using authenticator " << m_h235authenticators[auth]);
// TODO: return authenticator or put it into tmp EPRec if we want to add tokens to GCF
gcf.IncludeOptionalField(H225_GatekeeperConfirm::e_authenticationMode);
gcf.m_authenticationMode = grq.m_authenticationCapability[cap];
gcf.IncludeOptionalField(H225_GatekeeperConfirm::e_algorithmOID);
gcf.m_algorithmOID = grq.m_algorithmOIDs[alg];
if (gcf.m_authenticationMode.GetTag() == H235_AuthenticationMechanism::e_pwdSymEnc) {
// add the challenge token
gcf.IncludeOptionalField(H225_GatekeeperConfirm::e_tokens);
// make sure we don't overwrite other tokens, eg. H.235.TSSM
gcf.m_tokens.SetSize(gcf.m_tokens.GetSize() + 1);
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_tokenOID = "0.0";
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].IncludeOptionalField(H235_ClearToken::e_timeStamp);
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_timeStamp = (unsigned)time(NULL); // Avaya seems to send a different timestamp that is 34 years back, but accepts this as well
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].IncludeOptionalField(H235_ClearToken::e_random);
#ifdef PSSL
// if we have OpenSSL, use it for random number generation, fall back on stdlib rand()
if(RAND_bytes(gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_random, sizeof(gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_random)) != 1) {
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_random = rand();
}
#else
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_random = rand();
#endif // PSSL
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].IncludeOptionalField(H235_ClearToken::e_generalID);
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_generalID = Toolkit::GKName();
#ifdef HAS_AVAYA_SUPPORT
if (gcf.m_algorithmOID == "2.16.840.1.114187.1.3") {
gcf.m_tokens[gcf.m_tokens.GetSize() - 1].m_generalID = "DEFINITY-GK";
PTRACE(4, "GKAUTH\tGatekeeper generalID changed for interworking with Avaya endpoint");
}
#endif
}
return;
}
}
}
}
}
}
}
bool GkAuthenticatorList::Validate(
/// RRQ to be validated by authenticators
RasPDU<H225_RegistrationRequest> & request,
/// authorization data (reject reason, ...)
RRQAuthData & authData
)
{
ReadLock lock(m_reloadMutex);
std::list<GkAuthenticator*>::const_iterator i = m_authenticators.begin();
while (i != m_authenticators.end()) {
GkAuthenticator* auth = *i++;
if (auth->IsRasCheckEnabled(RasInfo<H225_RegistrationRequest>::flag)) {
const int result = auth->Check(request, authData);
if (result == GkAuthenticator::e_ok) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " RRQ check ok");
if (auth->GetControlFlag() == GkAuthenticator::e_Sufficient
|| auth->GetControlFlag() == GkAuthenticator::e_Alternative)
return true;
} else if (result == GkAuthenticator::e_fail) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " RRQ check failed");
SNMP_TRAP(8, SNMPError, Authentication, auth->GetName() + " RRQ check failed");
return false;
}
}
}
return true;
}
bool GkAuthenticatorList::Validate(
/// ARQ to be validated by authenticators
RasPDU<H225_AdmissionRequest> & request,
/// authorization data (call duration limit, reject reason, ...)
ARQAuthData & authData)
{
ReadLock lock(m_reloadMutex);
std::list<GkAuthenticator*>::const_iterator i = m_authenticators.begin();
while (i != m_authenticators.end()) {
GkAuthenticator* auth = *i++;
if (auth->IsRasCheckEnabled(RasInfo<H225_AdmissionRequest>::flag)) {
const long oldDurationLimit = authData.m_callDurationLimit;
const int result = auth->Check(request, authData);
if (authData.m_callDurationLimit == 0) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " ARQ check failed: "
"call duration 0");
SNMP_TRAP(8, SNMPError, Authentication, auth->GetName() + " ARQ check failed");
return false;
}
if (authData.m_callDurationLimit >= 0 && oldDurationLimit >= 0)
authData.m_callDurationLimit = PMIN(
authData.m_callDurationLimit, oldDurationLimit
);
else
authData.m_callDurationLimit = PMAX(
authData.m_callDurationLimit, oldDurationLimit
);
if (result == GkAuthenticator::e_ok) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " ARQ check ok");
if (auth->GetControlFlag() == GkAuthenticator::e_Sufficient
|| auth->GetControlFlag() == GkAuthenticator::e_Alternative)
return true;
} else if (result == GkAuthenticator::e_fail) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " ARQ check failed");
SNMP_TRAP(8, SNMPError, Authentication, auth->GetName() + " ARQ check failed");
return false;
}
}
}
return true;
}
bool GkAuthenticatorList::Validate(
SetupMsg & setup,
/// authorization data (call duration limit, reject reason, ...)
SetupAuthData & authData)
{
ReadLock lock(m_reloadMutex);
std::list<GkAuthenticator*>::const_iterator i = m_authenticators.begin();
while (i != m_authenticators.end()) {
GkAuthenticator* auth = *i++;
if (auth->IsMiscCheckEnabled(GkAuthenticator::e_Setup)
|| (!authData.m_fromRegistered
&& auth->IsMiscCheckEnabled(GkAuthenticator::e_SetupUnreg))) {
const long oldDurationLimit = authData.m_callDurationLimit;
const int result = auth->Check(setup, authData);
if (authData.m_callDurationLimit == 0) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " Setup check failed: "
"call duration limit 0");
SNMP_TRAP(8, SNMPError, Authentication, auth->GetName() + " Setup check failed");
return false;
}
if (authData.m_callDurationLimit >= 0 && oldDurationLimit >= 0) {
authData.m_callDurationLimit = PMIN(authData.m_callDurationLimit, oldDurationLimit);
} else {
authData.m_callDurationLimit = PMAX(authData.m_callDurationLimit, oldDurationLimit);
}
if (result == GkAuthenticator::e_ok) {
PTRACE(3, "GKAUTH\t" << auth->GetName() << " Setup check ok");
if (auth->GetControlFlag() == GkAuthenticator::e_Sufficient
|| auth->GetControlFlag() == GkAuthenticator::e_Alternative)