* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * InspIRCd: (C) 2002-2007 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
- * the file COPYING for details.
+ * the file COPYING for details.
*
* ---------------------------------------------------
*/
*/
class CloakUser : public ModeHandler
{
+ public:
std::string prefix;
unsigned int key1;
unsigned int key2;
unsigned int key3;
unsigned int key4;
bool ipalways;
- Module* Sender;
Module* HashProvider;
const char *xtab[4];
+ LocalStringExt ext;
/** This function takes a domain name string and returns just the last two domain parts,
* or the last domain part if only two are available. Failing that it just returns what it was given.
* For example, if it is passed "svn.inspircd.org" it will return ".inspircd.org".
* If it is passed "brainbox.winbot.co.uk" it will return ".co.uk",
* and if it is passed "localhost.localdomain" it will return ".localdomain".
- *
+ *
* This is used to ensure a significant part of the host is always cloaked (see Bug #216)
*/
std::string LastTwoDomainParts(const std::string &host)
else
return host.substr(splitdot);
}
-
- public:
- CloakUser(InspIRCd* Instance, Module* Source, Module* Hash) : ModeHandler(Instance, 'x', 0, 0, false, MODETYPE_USER, false), Sender(Source), HashProvider(Hash)
+
+ CloakUser(Module* source, Module* Hash)
+ : ModeHandler(source, 'x', PARAM_NONE, MODETYPE_USER), HashProvider(Hash),
+ ext("cloaked_host", source)
{
}
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
- if (source != dest)
- return MODEACTION_DENY;
-
/* For remote clients, we dont take any action, we just allow it.
* The local server where they are will set their cloak instead.
+ * This is fine, as we will recieve it later.
*/
if (!IS_LOCAL(dest))
+ {
+ dest->SetMode('x',adding);
return MODEACTION_ALLOW;
+ }
/* don't allow this user to spam modechanges */
dest->IncreasePenalty(5);
* are connecting via localhost) -- this doesnt matter much.
*/
- char* n1 = strchr(dest->host,'.');
- char* n2 = strchr(dest->host,':');
-
- if (n1 || n2)
+ std::string* cloak = ext.get(dest);
+
+ if (!cloak)
{
- unsigned int iv[] = { key1, key2, key3, key4 };
- std::string a = LastTwoDomainParts(dest->host);
- std::string b;
-
- /* InspIRCd users have two hostnames; A displayed
- * hostname which can be modified by modules (e.g.
- * to create vhosts, implement chghost, etc) and a
- * 'real' hostname which you shouldnt write to.
- */
-
- /* 2007/08/18: add <cloak:ipalways> which always cloaks
- * the IP, for anonymity. --nenolod
- */
- if (!ipalways)
- {
- /** Reset the Hash module, and send it our IV and hex table */
- HashResetRequest(Sender, HashProvider).Send();
- HashKeyRequest(Sender, HashProvider, iv).Send();
- HashHexRequest(Sender, HashProvider, xtab[(*dest->host) % 4]);
-
- /* Generate a cloak using specialized Hash */
- std::string hostcloak = prefix + "-" + std::string(HashSumRequest(Sender, HashProvider, dest->host).Send()).substr(0,8) + a;
-
- /* Fix by brain - if the cloaked host is > the max length of a host (64 bytes
- * according to the DNS RFC) then tough titty, they get cloaked as an IP.
- * Their ISP shouldnt go to town on subdomains, or they shouldnt have a kiddie
- * vhost.
- */
-#ifdef IPV6
- in6_addr testaddr;
- in_addr testaddr2;
- if ((dest->GetProtocolFamily() == AF_INET6) && (inet_pton(AF_INET6,dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))
- /* Invalid ipv6 address, and ipv6 user (resolved host) */
- b = hostcloak;
- else if ((dest->GetProtocolFamily() == AF_INET) && (inet_aton(dest->host,&testaddr2) < 1) && (hostcloak.length() <= 64))
- /* Invalid ipv4 address, and ipv4 user (resolved host) */
- b = hostcloak;
- else
- /* Valid ipv6 or ipv4 address (not resolved) ipv4 or ipv6 user */
- b = ((!strchr(dest->host,':')) ? Cloak4(dest->host) : Cloak6(dest->host));
-#else
- in_addr testaddr;
- if ((inet_aton(dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))
- /* Invalid ipv4 address, and ipv4 user (resolved host) */
- b = hostcloak;
- else
- /* Valid ipv4 address (not resolved) ipv4 user */
- b = Cloak4(dest->host);
-#endif
- }
- else
- {
-#ifdef IPV6
- if (dest->GetProtocolFamily() == AF_INET6)
- b = Cloak6(dest->GetIPString());
-#endif
- if (dest->GetProtocolFamily() == AF_INET)
- b = Cloak4(dest->GetIPString());
- }
-
- dest->ChangeDisplayedHost(b.c_str());
+ /* Force creation of missing cloak */
+ creator->OnUserConnect(dest);
+ cloak = ext.get(dest);
+ }
+ if (cloak)
+ {
+ dest->ChangeDisplayedHost(cloak->c_str());
+ dest->SetMode('x',true);
+ return MODEACTION_ALLOW;
}
-
- dest->SetMode('x',true);
- return MODEACTION_ALLOW;
}
}
else
- {
+ {
if (dest->IsModeSet('x'))
{
- /* User is removing the mode, so just restore their real host
- * and make it match the displayed one.
+ /* User is removing the mode, so just restore their real host
+ * and make it match the displayed one.
*/
- dest->ChangeDisplayedHost(dest->host);
+ dest->ChangeDisplayedHost(dest->host.c_str());
dest->SetMode('x',false);
return MODEACTION_ALLOW;
}
octet[1] = octet[0] + "." + octet[1];
/* Reset the Hash module and send it our IV */
- HashResetRequest(Sender, HashProvider).Send();
- HashKeyRequest(Sender, HashProvider, iv).Send();
+ HashResetRequest(creator, HashProvider).Send();
+ HashKeyRequest(creator, HashProvider, iv).Send();
/* Send the Hash module a different hex table for each octet group's Hash sum */
for (int k = 0; k < 4; k++)
{
- HashHexRequest(Sender, HashProvider, xtab[(iv[k]+i[k]) % 4]).Send();
- ra[k] = std::string(HashSumRequest(Sender, HashProvider, octet[k]).Send()).substr(0,6);
+ HashHexRequest(creator, HashProvider, xtab[(iv[k]+i[k]) % 4]).Send();
+ ra[k] = std::string(HashSumRequest(creator, HashProvider, octet[k]).Send()).substr(0,6);
}
/* Stick them all together */
return std::string().append(ra[0]).append(".").append(ra[1]).append(".").append(ra[2]).append(".").append(ra[3]);
std::string Cloak6(const char* ip)
{
- /* Theyre using 4in6 (YUCK). Translate as ipv4 cloak */
- if (!strncmp(ip, "0::ffff:", 8))
- return Cloak4(ip + 8);
-
- /* If we get here, yes it really is an ipv6 ip */
unsigned int iv[] = { key1, key2, key3, key4 };
std::vector<std::string> hashies;
std::string item;
int rounds = 0;
/* Reset the Hash module and send it our IV */
- HashResetRequest(Sender, HashProvider).Send();
- HashKeyRequest(Sender, HashProvider, iv).Send();
+ HashResetRequest(creator, HashProvider).Send();
+ HashKeyRequest(creator, HashProvider, iv).Send();
for (const char* input = ip; *input; input++)
{
if (item.length() > 7)
{
/* Send the Hash module a different hex table for each octet group's Hash sum */
- HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();
- hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));
+ HashHexRequest(creator, HashProvider, xtab[(key1+rounds) % 4]).Send();
+ hashies.push_back(std::string(HashSumRequest(creator, HashProvider, item).Send()).substr(0,8));
item.clear();
}
rounds++;
if (!item.empty())
{
/* Send the Hash module a different hex table for each octet group's Hash sum */
- HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();
- hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));
+ HashHexRequest(creator, HashProvider, xtab[(key1+rounds) % 4]).Send();
+ hashies.push_back(std::string(HashSumRequest(creator, HashProvider, item).Send()).substr(0,8));
item.clear();
}
/* Stick them all together */
return irc::stringjoiner(":", hashies, 0, hashies.size() - 1).GetJoined();
}
-
+
void DoRehash()
{
- ConfigReader Conf(ServerInstance);
+ ConfigReader Conf;
bool lowercase;
-
- /* These are *not* using the need_positive parameter of ReadInteger -
+
+ /* These are *not* using the need_positive parameter of ReadInteger -
* that will limit the valid values to only the positive values in a
* signed int. Instead, accept any value that fits into an int and
* cast it to an unsigned int. That will, a bit oddly, give us the full
prefix = Conf.ReadValue("cloak","prefix",0);
ipalways = Conf.ReadFlag("cloak", "ipalways", 0);
lowercase = Conf.ReadFlag("cloak", "lowercase", 0);
-
+
if (!lowercase)
{
xtab[0] = "F92E45D871BCA630";
class ModuleCloaking : public Module
{
private:
-
CloakUser* cu;
- Module* HashModule;
public:
- ModuleCloaking(InspIRCd* Me)
- : Module(Me)
+ ModuleCloaking()
{
- ServerInstance->Modules->UseInterface("HashRequest");
-
/* Attempt to locate the md5 service provider, bail if we can't find it */
- HashModule = ServerInstance->Modules->Find("m_md5.so");
+ Module* HashModule = ServerInstance->Modules->Find("m_md5.so");
if (!HashModule)
throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_cloaking.so.");
- /* Create new mode handler object */
- cu = new CloakUser(ServerInstance, this, HashModule);
+ cu = new CloakUser(this, HashModule);
- OnRehash(NULL,"");
+ try
+ {
+ OnRehash(NULL);
+ }
+ catch (ModuleException &e)
+ {
+ delete cu;
+ throw e;
+ }
/* Register it with the core */
- if (!ServerInstance->AddMode(cu))
+ if (!ServerInstance->Modes->AddMode(cu))
+ {
+ delete cu;
throw ModuleException("Could not add new modes!");
+ }
+
+ ServerInstance->Modules->UseInterface("HashRequest");
+ Extensible::Register(&cu->ext);
- Implementation eventlist[] = { I_OnRehash };
- ServerInstance->Modules->Attach(eventlist, this, 1);
+ Implementation eventlist[] = { I_OnRehash, I_OnCheckBan, I_OnUserConnect };
+ ServerInstance->Modules->Attach(eventlist, this, 3);
+
+ CloakExistingUsers();
}
-
- virtual ~ModuleCloaking()
+
+ void CloakExistingUsers()
+ {
+ std::string* cloak;
+ for (std::vector<User*>::iterator u = ServerInstance->Users->local_users.begin(); u != ServerInstance->Users->local_users.end(); u++)
+ {
+ cloak = cu->ext.get(*u);
+ if (!cloak)
+ {
+ OnUserConnect(*u);
+ }
+ }
+ }
+
+ ModResult OnCheckBan(User* user, Channel* chan, const std::string& mask)
+ {
+ char cmask[MAXBUF];
+ std::string* cloak = cu->ext.get(user);
+ /* Check if they have a cloaked host, but are not using it */
+ if (cloak && *cloak != user->dhost)
+ {
+ snprintf(cmask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), cloak->c_str());
+ if (InspIRCd::Match(cmask,mask))
+ return MOD_RES_DENY;
+ }
+ return MOD_RES_PASSTHRU;
+ }
+
+ void Prioritize()
+ {
+ /* Needs to be after m_banexception etc. */
+ ServerInstance->Modules->SetPriority(this, I_OnCheckBan, PRIORITY_LAST);
+
+ /* but before m_conn_umodes, so host is generated ready to apply */
+ Module *um = ServerInstance->Modules->Find("m_conn_umodes.so");
+ ServerInstance->Modules->SetPriority(this, I_OnUserConnect, PRIORITY_AFTER, &um);
+ }
+
+ ~ModuleCloaking()
{
ServerInstance->Modes->DelMode(cu);
delete cu;
ServerInstance->Modules->DoneWithInterface("HashRequest");
}
-
- virtual Version GetVersion()
+
+ Version GetVersion()
{
// returns the version number of the module to be
// listed in /MODULES
- return Version(1,1,0,2,VF_COMMON|VF_VENDOR,API_VERSION);
+ return Version("Provides masking of user hostnames", VF_COMMON|VF_VENDOR,API_VERSION);
}
- virtual void OnRehash(User* user, const std::string ¶meter)
+ void OnRehash(User* user)
{
cu->DoRehash();
}
+ void OnUserConnect(User* dest)
+ {
+ std::string* cloak = cu->ext.get(dest);
+ if (cloak)
+ return;
+
+ if (dest->host.find('.') != std::string::npos || dest->host.find(':') != std::string::npos)
+ {
+ unsigned int iv[] = { cu->key1, cu->key2, cu->key3, cu->key4 };
+ std::string a = cu->LastTwoDomainParts(dest->host);
+ std::string b;
+
+ /* InspIRCd users have two hostnames; A displayed
+ * hostname which can be modified by modules (e.g.
+ * to create vhosts, implement chghost, etc) and a
+ * 'real' hostname which you shouldnt write to.
+ */
+
+ /* 2008/08/18: add <cloak:ipalways> which always cloaks
+ * the IP, for anonymity. --nenolod
+ */
+ if (!cu->ipalways)
+ {
+ /** Reset the Hash module, and send it our IV and hex table */
+ HashResetRequest(this, cu->HashProvider).Send();
+ HashKeyRequest(this, cu->HashProvider, iv).Send();
+ HashHexRequest(this, cu->HashProvider, cu->xtab[(dest->host[0]) % 4]);
+
+ /* Generate a cloak using specialized Hash */
+ std::string hostcloak = cu->prefix + "-" + std::string(HashSumRequest(this, cu->HashProvider, dest->host.c_str()).Send()).substr(0,8) + a;
+
+ /* Fix by brain - if the cloaked host is > the max length of a host (64 bytes
+ * according to the DNS RFC) then tough titty, they get cloaked as an IP.
+ * Their ISP shouldnt go to town on subdomains, or they shouldnt have a kiddie
+ * vhost.
+ */
+ std::string testaddr;
+ int testport;
+ if (!irc::sockets::satoap(&dest->client_sa, testaddr, testport) && (hostcloak.length() <= 64))
+ /* not a valid address, must have been a host, so cloak as a host */
+ b = hostcloak;
+ else if (dest->client_sa.sa.sa_family == AF_INET6)
+ b = cu->Cloak6(dest->GetIPString());
+ else
+ b = cu->Cloak4(dest->GetIPString());
+ }
+ else
+ {
+ if (dest->client_sa.sa.sa_family == AF_INET6)
+ b = cu->Cloak6(dest->GetIPString());
+ else
+ b = cu->Cloak4(dest->GetIPString());
+ }
+
+ cu->ext.set(dest,b);
+ }
+ }
+
};
MODULE_INIT(ModuleCloaking)
projects / user / henk / code / inspircd.git / blobdiff