-/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r#include "inspircd.h"\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r#include "m_hash.h"\r\r/* $ModDesc: Provides masking of user hostnames */\r/* $ModDep: m_hash.h */\r\r/* Used to vary the output a little more depending on the cloak keys */\rstatic const char* xtab[] = {"F92E45D871BCA630", "A1B9D80C72E653F4", "1ABC078934DEF562", "ABCDEF5678901234"};\r\r/** Handles user mode +x\r */\rclass CloakUser : public ModeHandler\r{\r \r std::string prefix;\r unsigned int key1;\r unsigned int key2;\r unsigned int key3;\r unsigned int key4;\r Module* Sender;\r Module* HashProvider;\r\r /** This function takes a domain name string and returns just the last two domain parts,\r * or the last domain part if only two are available. Failing that it just returns what it was given.\r *\r * For example, if it is passed "svn.inspircd.org" it will return ".inspircd.org".\r * If it is passed "brainbox.winbot.co.uk" it will return ".co.uk",\r * and if it is passed "localhost.localdomain" it will return ".localdomain".\r * \r * This is used to ensure a significant part of the host is always cloaked (see Bug #216)\r */\r std::string LastTwoDomainParts(const std::string &host)\r {\r int dots = 0;\r std::string::size_type splitdot = host.length();\r\r for (std::string::size_type x = host.length() - 1; x; --x)\r {\r if (host[x] == '.')\r {\r splitdot = x;\r dots++;\r }\r if (dots >= 3)\r break;\r }\r\r if (splitdot == host.length())\r return host;\r else\r return host.substr(splitdot);\r }\r \r public:\r CloakUser(InspIRCd* Instance, Module* Source, Module* Hash) : ModeHandler(Instance, 'x', 0, 0, false, MODETYPE_USER, false), Sender(Source), HashProvider(Hash)\r {\r }\r\r ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)\r {\r if (source != dest)\r return MODEACTION_DENY;\r\r /* For remote clients, we dont take any action, we just allow it.\r * The local server where they are will set their cloak instead.\r */\r if (!IS_LOCAL(dest))\r return MODEACTION_ALLOW;\r\r if (adding)\r {\r if(!dest->IsModeSet('x'))\r {\r /* The mode is being turned on - so attempt to\r * allocate the user a cloaked host using a non-reversible\r * algorithm (its simple, but its non-reversible so the\r * simplicity doesnt really matter). This algorithm\r * will not work if the user has only one level of domain\r * naming in their hostname (e.g. if they are on a lan or\r * are connecting via localhost) -- this doesnt matter much.\r */\r\r char* n1 = strchr(dest->host,'.');\r char* n2 = strchr(dest->host,':');\r \r if (n1 || n2)\r {\r /* InspIRCd users have two hostnames; A displayed\r * hostname which can be modified by modules (e.g.\r * to create vhosts, implement chghost, etc) and a\r * 'real' hostname which you shouldnt write to.\r */\r\r unsigned int iv[] = { key1, key2, key3, key4 };\r std::string a = LastTwoDomainParts(dest->host);\r std::string b;\r\r /** Reset the Hash module, and send it our IV and hex table */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r HashHexRequest(Sender, HashProvider, xtab[(*dest->host) % 4]);\r\r /* Generate a cloak using specialized Hash */\r std::string hostcloak = prefix + "-" + std::string(HashSumRequest(Sender, HashProvider, dest->host).Send()).substr(0,8) + a;\r\r /* Fix by brain - if the cloaked host is > the max length of a host (64 bytes\r * according to the DNS RFC) then tough titty, they get cloaked as an IP. \r * Their ISP shouldnt go to town on subdomains, or they shouldnt have a kiddie\r * vhost.\r */\r#ifdef IPV6\r in6_addr testaddr;\r in_addr testaddr2;\r if ((dest->GetProtocolFamily() == AF_INET6) && (inet_pton(AF_INET6,dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv6 address, and ipv6 user (resolved host) */\r b = hostcloak;\r else if ((dest->GetProtocolFamily() == AF_INET) && (inet_aton(dest->host,&testaddr2) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv4 address, and ipv4 user (resolved host) */\r b = hostcloak;\r else\r /* Valid ipv6 or ipv4 address (not resolved) ipv4 or ipv6 user */\r b = ((!strchr(dest->host,':')) ? Cloak4(dest->host) : Cloak6(dest->host));\r#else\r in_addr testaddr;\r if ((inet_aton(dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv4 address, and ipv4 user (resolved host) */\r b = hostcloak;\r else\r /* Valid ipv4 address (not resolved) ipv4 user */\r b = Cloak4(dest->host);\r#endif\r\r dest->ChangeDisplayedHost(b.c_str());\r }\r \r dest->SetMode('x',true);\r return MODEACTION_ALLOW;\r }\r }\r else\r {\r if (dest->IsModeSet('x'))\r {\r /* User is removing the mode, so just restore their real host\r * and make it match the displayed one.\r */\r dest->ChangeDisplayedHost(dest->host);\r dest->SetMode('x',false);\r return MODEACTION_ALLOW;\r }\r }\r\r return MODEACTION_DENY;\r }\r\r std::string Cloak4(const char* ip)\r {\r unsigned int iv[] = { key1, key2, key3, key4 };\r irc::sepstream seps(ip, '.');\r std::string ra[4];;\r std::string octet[4];\r int i[4];\r\r for (int j = 0; j < 4; j++)\r {\r octet[j] = seps.GetToken();\r i[j] = atoi(octet[j].c_str());\r }\r\r octet[3] = octet[0] + "." + octet[1] + "." + octet[2] + "." + octet[3];\r octet[2] = octet[0] + "." + octet[1] + "." + octet[2];\r octet[1] = octet[0] + "." + octet[1];\r\r /* Reset the Hash module and send it our IV */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r for (int k = 0; k < 4; k++)\r {\r HashHexRequest(Sender, HashProvider, xtab[(iv[k]+i[k]) % 4]).Send();\r ra[k] = std::string(HashSumRequest(Sender, HashProvider, octet[k]).Send()).substr(0,6);\r }\r /* Stick them all together */\r return std::string().append(ra[0]).append(".").append(ra[1]).append(".").append(ra[2]).append(".").append(ra[3]);\r }\r\r std::string Cloak6(const char* ip)\r {\r /* Theyre using 4in6 (YUCK). Translate as ipv4 cloak */\r if (!strncmp(ip, "0::ffff:", 8))\r return Cloak4(ip + 8);\r\r /* If we get here, yes it really is an ipv6 ip */\r unsigned int iv[] = { key1, key2, key3, key4 };\r std::vector<std::string> hashies;\r std::string item;\r int rounds = 0;\r\r /* Reset the Hash module and send it our IV */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r\r for (const char* input = ip; *input; input++)\r {\r item += *input;\r if (item.length() > 7)\r {\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();\r hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));\r item.clear();\r }\r rounds++;\r }\r if (!item.empty())\r {\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();\r hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));\r item.clear();\r }\r /* Stick them all together */\r return irc::stringjoiner(":", hashies, 0, hashies.size() - 1).GetJoined();\r }\r \r void DoRehash()\r {\r ConfigReader Conf(ServerInstance);\r key1 = key2 = key3 = key4 = 0;\r key1 = Conf.ReadInteger("cloak","key1",0,true);\r key2 = Conf.ReadInteger("cloak","key2",0,true);\r key3 = Conf.ReadInteger("cloak","key3",0,true);\r key4 = Conf.ReadInteger("cloak","key4",0,true);\r prefix = Conf.ReadValue("cloak","prefix",0);\r\r if (prefix.empty())\r prefix = ServerInstance->Config->Network;\r\r if (!key1 && !key2 && !key3 && !key4)\r throw ModuleException("You have not defined cloak keys for m_cloaking!!! THIS IS INSECURE AND SHOULD BE CHECKED!");\r }\r};\r\r\rclass ModuleCloaking : public Module\r{\r private:\r \r CloakUser* cu;\r Module* HashModule;\r\r public:\r ModuleCloaking(InspIRCd* Me)\r : Module(Me)\r {\r ServerInstance->UseInterface("HashRequest");\r\r /* Attempt to locate the md5 service provider, bail if we can't find it */\r HashModule = ServerInstance->FindModule("m_md5.so");\r if (!HashModule)\r throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_cloaking.so.");\r\r /* Create new mode handler object */\r cu = new CloakUser(ServerInstance, this, HashModule);\r\r /* Register it with the core */ \r if (!ServerInstance->AddMode(cu, 'x'))\r throw ModuleException("Could not add new modes!");\r\r OnRehash(NULL,"");\r }\r \r virtual ~ModuleCloaking()\r {\r ServerInstance->Modes->DelMode(cu);\r DELETE(cu);\r ServerInstance->DoneWithInterface("HashRequest");\r }\r \r virtual Version GetVersion()\r {\r // returns the version number of the module to be\r // listed in /MODULES\r return Version(1,1,0,2,VF_COMMON|VF_VENDOR,API_VERSION);\r }\r\r virtual void OnRehash(userrec* user, const std::string ¶meter)\r {\r cu->DoRehash();\r }\r\r void Implements(char* List)\r {\r List[I_OnRehash] = 1;\r }\r};\r\rMODULE_INIT(ModuleCloaking)\r
\ No newline at end of file
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2006-2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
+ * Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 John Brooks <john.brooks@dereferenced.net>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
+ *
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "inspircd.h"
+#include "modules/hash.h"
+
+enum CloakMode
+{
+ /** 2.0 cloak of "half" of the hostname plus the full IP hash */
+ MODE_HALF_CLOAK,
+
+ /** 2.0 cloak of IP hash, split at 2 common CIDR range points */
+ MODE_OPAQUE
+};
+
+// lowercase-only encoding similar to base64, used for hash output
+static const char base32[] = "0123456789abcdefghijklmnopqrstuv";
+
+// The minimum length of a cloak key.
+static const size_t minkeylen = 30;
+
+struct CloakInfo
+{
+ // The method used for cloaking users.
+ CloakMode mode;
+
+ // The number of parts of the hostname shown when using half cloaking.
+ unsigned int domainparts;
+
+ // The secret used for generating cloaks.
+ std::string key;
+
+ // The prefix for cloaks (e.g. MyNet-).
+ std::string prefix;
+
+ // The suffix for IP cloaks (e.g. .IP).
+ std::string suffix;
+
+ CloakInfo(CloakMode Mode, const std::string& Key, const std::string& Prefix, const std::string& Suffix, unsigned int DomainParts = 0)
+ : mode(Mode)
+ , domainparts(DomainParts)
+ , key(Key)
+ , prefix(Prefix)
+ , suffix(Suffix)
+ {
+ }
+};
+
+typedef std::vector<std::string> CloakList;
+
+/** Handles user mode +x
+ */
+class CloakUser : public ModeHandler
+{
+ public:
+ bool active;
+ SimpleExtItem<CloakList> ext;
+ std::string debounce_uid;
+ time_t debounce_ts;
+ int debounce_count;
+
+ CloakUser(Module* source)
+ : ModeHandler(source, "cloak", 'x', PARAM_NONE, MODETYPE_USER)
+ , active(false)
+ , ext("cloaked_host", ExtensionItem::EXT_USER, source)
+ , debounce_ts(0)
+ , debounce_count(0)
+ {
+ }
+
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& parameter, bool adding) CXX11_OVERRIDE
+ {
+ LocalUser* user = IS_LOCAL(dest);
+
+ /* For remote clients, we don't take any action, we just allow it.
+ * The local server where they are will set their cloak instead.
+ * This is fine, as we will receive it later.
+ */
+ if (!user)
+ {
+ // Remote setters broadcast mode before host while local setters do the opposite, so this takes that into account
+ active = IS_LOCAL(source) ? adding : !adding;
+ dest->SetMode(this, adding);
+ return MODEACTION_ALLOW;
+ }
+
+ if (user->uuid == debounce_uid && debounce_ts == ServerInstance->Time())
+ {
+ // prevent spamming using /mode user +x-x+x-x+x-x
+ if (++debounce_count > 2)
+ return MODEACTION_DENY;
+ }
+ else
+ {
+ debounce_uid = user->uuid;
+ debounce_count = 1;
+ debounce_ts = ServerInstance->Time();
+ }
+
+ if (adding == user->IsModeSet(this))
+ return MODEACTION_DENY;
+
+ /* don't allow this user to spam modechanges */
+ if (source == dest)
+ user->CommandFloodPenalty += 5000;
+
+ if (adding)
+ {
+ // assume this is more correct
+ if (user->registered != REG_ALL && user->GetRealHost() != user->GetDisplayedHost())
+ return MODEACTION_DENY;
+
+ CloakList* cloaks = ext.get(user);
+ if (!cloaks)
+ {
+ /* Force creation of missing cloak */
+ creator->OnUserConnect(user);
+ cloaks = ext.get(user);
+ }
+
+ // If we have a cloak then set the hostname.
+ if (cloaks && !cloaks->empty())
+ {
+ user->ChangeDisplayedHost(cloaks->front());
+ user->SetMode(this, true);
+ return MODEACTION_ALLOW;
+ }
+ else
+ return MODEACTION_DENY;
+ }
+ else
+ {
+ /* User is removing the mode, so restore their real host
+ * and make it match the displayed one.
+ */
+ user->SetMode(this, false);
+ user->ChangeDisplayedHost(user->GetRealHost().c_str());
+ return MODEACTION_ALLOW;
+ }
+ }
+};
+
+class CommandCloak : public Command
+{
+ public:
+ CommandCloak(Module* Creator) : Command(Creator, "CLOAK", 1)
+ {
+ flags_needed = 'o';
+ syntax = "<host>";
+ }
+
+ CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE;
+};
+
+class ModuleCloaking : public Module
+{
+ public:
+ CloakUser cu;
+ CommandCloak ck;
+ std::vector<CloakInfo> cloaks;
+ dynamic_reference<HashProvider> Hash;
+
+ ModuleCloaking()
+ : cu(this)
+ , ck(this)
+ , Hash(this, "hash/md5")
+ {
+ }
+
+ /** Takes a domain name and retrieves the subdomain which should be visible.
+ * This is usually the last \p domainparts labels but if not enough are
+ * present then all but the most specific label are used. If the domain name
+ * consists of one label only then none are used.
+ *
+ * Here are some examples for how domain names will be shortened assuming
+ * \p domainparts is set to the default of 3.
+ *
+ * "this.is.an.example.com" => ".an.example.com"
+ * "an.example.com" => ".example.com"
+ * "example.com" => ".com"
+ * "localhost" => ""
+ *
+ * @param host The hostname to cloak.
+ * @param domainparts The number of domain labels that should be visible.
+ * @return The visible segment of the hostname.
+ */
+ std::string VisibleDomainParts(const std::string& host, unsigned int domainparts)
+ {
+ // The position at which we found the last dot.
+ std::string::const_reverse_iterator dotpos;
+
+ // The number of dots we have seen so far.
+ unsigned int seendots = 0;
+
+ for (std::string::const_reverse_iterator iter = host.rbegin(); iter != host.rend(); ++iter)
+ {
+ if (*iter != '.')
+ continue;
+
+ // We have found a dot!
+ dotpos = iter;
+ seendots += 1;
+
+ // Do we have enough segments to stop?
+ if (seendots >= domainparts)
+ break;
+ }
+
+ // We only returns a domain part if more than one label is
+ // present. See above for a full explanation.
+ if (!seendots)
+ return "";
+ return std::string(dotpos.base() - 1, host.end());
+ }
+
+ /**
+ * 2.0-style cloaking function
+ * @param item The item to cloak (part of an IP or hostname)
+ * @param id A unique ID for this type of item (to make it unique if the item matches)
+ * @param len The length of the output. Maximum for MD5 is 16 characters.
+ */
+ std::string SegmentCloak(const CloakInfo& info, const std::string& item, char id, size_t len)
+ {
+ std::string input;
+ input.reserve(info.key.length() + 3 + item.length());
+ input.append(1, id);
+ input.append(info.key);
+ input.append(1, '\0'); // null does not terminate a C++ string
+ input.append(item);
+
+ std::string rv = Hash->GenerateRaw(input).substr(0,len);
+ for(size_t i = 0; i < len; i++)
+ {
+ // this discards 3 bits per byte. We have an
+ // overabundance of bits in the hash output, doesn't
+ // matter which ones we are discarding.
+ rv[i] = base32[rv[i] & 0x1F];
+ }
+ return rv;
+ }
+
+ std::string SegmentIP(const CloakInfo& info, const irc::sockets::sockaddrs& ip, bool full)
+ {
+ std::string bindata;
+ size_t hop1, hop2, hop3;
+ size_t len1, len2;
+ std::string rv;
+ if (ip.family() == AF_INET6)
+ {
+ bindata = std::string((const char*)ip.in6.sin6_addr.s6_addr, 16);
+ hop1 = 8;
+ hop2 = 6;
+ hop3 = 4;
+ len1 = 6;
+ len2 = 4;
+ // pfx s1.s2.s3. (xxxx.xxxx or s4) sfx
+ // 6 4 4 9/6
+ rv.reserve(info.prefix.length() + 26 + info.suffix.length());
+ }
+ else
+ {
+ bindata = std::string((const char*)&ip.in4.sin_addr, 4);
+ hop1 = 3;
+ hop2 = 0;
+ hop3 = 2;
+ len1 = len2 = 3;
+ // pfx s1.s2. (xxx.xxx or s3) sfx
+ rv.reserve(info.prefix.length() + 15 + info.suffix.length());
+ }
+
+ rv.append(info.prefix);
+ rv.append(SegmentCloak(info, bindata, 10, len1));
+ rv.append(1, '.');
+ bindata.erase(hop1);
+ rv.append(SegmentCloak(info, bindata, 11, len2));
+ if (hop2)
+ {
+ rv.append(1, '.');
+ bindata.erase(hop2);
+ rv.append(SegmentCloak(info, bindata, 12, len2));
+ }
+
+ if (full)
+ {
+ rv.append(1, '.');
+ bindata.erase(hop3);
+ rv.append(SegmentCloak(info, bindata, 13, 6));
+ rv.append(info.suffix);
+ }
+ else
+ {
+ if (ip.family() == AF_INET6)
+ {
+ rv.append(InspIRCd::Format(".%02x%02x.%02x%02x%s",
+ ip.in6.sin6_addr.s6_addr[2], ip.in6.sin6_addr.s6_addr[3],
+ ip.in6.sin6_addr.s6_addr[0], ip.in6.sin6_addr.s6_addr[1], info.suffix.c_str()));
+ }
+ else
+ {
+ const unsigned char* ip4 = (const unsigned char*)&ip.in4.sin_addr;
+ rv.append(InspIRCd::Format(".%d.%d%s", ip4[1], ip4[0], info.suffix.c_str()));
+ }
+ }
+ return rv;
+ }
+
+ ModResult OnCheckBan(User* user, Channel* chan, const std::string& mask) CXX11_OVERRIDE
+ {
+ LocalUser* lu = IS_LOCAL(user);
+ if (!lu)
+ return MOD_RES_PASSTHRU;
+
+ // Force the creation of cloaks if not already set.
+ OnUserConnect(lu);
+
+ // If the user has no cloaks (i.e. UNIX socket) then we do nothing here.
+ CloakList* cloaklist = cu.ext.get(user);
+ if (!cloaklist || cloaklist->empty())
+ return MOD_RES_PASSTHRU;
+
+ // Check if they have a cloaked host but are not using it.
+ for (CloakList::const_iterator iter = cloaklist->begin(); iter != cloaklist->end(); ++iter)
+ {
+ const std::string& cloak = *iter;
+ if (cloak != user->GetDisplayedHost())
+ {
+ const std::string cloakMask = user->nick + "!" + user->ident + "@" + cloak;
+ if (InspIRCd::Match(cloakMask, mask))
+ return MOD_RES_DENY;
+ }
+ }
+ return MOD_RES_PASSTHRU;
+ }
+
+ void Prioritize() CXX11_OVERRIDE
+ {
+ /* Needs to be after m_banexception etc. */
+ ServerInstance->Modules->SetPriority(this, I_OnCheckBan, PRIORITY_LAST);
+ }
+
+ // this unsets umode +x on every host change. If we are actually doing a +x
+ // mode change, we will call SetMode back to true AFTER the host change is done.
+ void OnChangeHost(User* u, const std::string& host) CXX11_OVERRIDE
+ {
+ if (u->IsModeSet(cu) && !cu.active)
+ {
+ u->SetMode(cu, false);
+
+ if (!IS_LOCAL(u))
+ return;
+ Modes::ChangeList modechangelist;
+ modechangelist.push_remove(&cu);
+ ClientProtocol::Events::Mode modeevent(ServerInstance->FakeClient, NULL, u, modechangelist);
+ static_cast<LocalUser*>(u)->Send(modeevent);
+ }
+ cu.active = false;
+ }
+
+ Version GetVersion() CXX11_OVERRIDE
+ {
+ std::string testcloak = "broken";
+ if (Hash && !cloaks.empty())
+ {
+ const CloakInfo& info = cloaks.front();
+ switch (info.mode)
+ {
+ case MODE_HALF_CLOAK:
+ // Use old cloaking verification to stay compatible with 2.0
+ // But verify domainparts when use 3.0-only features
+ if (info.domainparts == 3)
+ testcloak = info.prefix + SegmentCloak(info, "*", 3, 8) + info.suffix;
+ else
+ {
+ irc::sockets::sockaddrs sa;
+ testcloak = GenCloak(info, sa, "", testcloak + ConvToStr(info.domainparts));
+ }
+ break;
+ case MODE_OPAQUE:
+ testcloak = info.prefix + SegmentCloak(info, "*", 4, 8) + info.suffix;
+ }
+ }
+ return Version("Provides masking of user hostnames", VF_COMMON|VF_VENDOR, testcloak);
+ }
+
+ void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
+ {
+ ConfigTagList tags = ServerInstance->Config->ConfTags("cloak");
+ if (tags.first == tags.second)
+ throw ModuleException("You have loaded the cloaking module but not configured any <cloak> tags!");
+
+ std::vector<CloakInfo> newcloaks;
+ for (ConfigIter i = tags.first; i != tags.second; ++i)
+ {
+ ConfigTag* tag = i->second;
+
+ // Ensure that we have the <cloak:key> parameter.
+ const std::string key = tag->getString("key");
+ if (key.empty())
+ throw ModuleException("You have not defined a cloaking key. Define <cloak:key> as a " + ConvToStr(minkeylen) + "+ character network-wide secret, at " + tag->getTagLocation());
+
+ // If we are the first cloak method then mandate a strong key.
+ if (i == tags.first && key.length() < minkeylen)
+ throw ModuleException("Your cloaking key is not secure. It should be at least " + ConvToStr(minkeylen) + " characters long, at " + tag->getTagLocation());
+
+ const std::string mode = tag->getString("mode");
+ const std::string prefix = tag->getString("prefix");
+ const std::string suffix = tag->getString("suffix", ".IP");
+ if (stdalgo::string::equalsci(mode, "half"))
+ {
+ unsigned int domainparts = tag->getUInt("domainparts", 3, 1, 10);
+ newcloaks.push_back(CloakInfo(MODE_HALF_CLOAK, key, prefix, suffix, domainparts));
+ }
+ else if (stdalgo::string::equalsci(mode, "full"))
+ newcloaks.push_back(CloakInfo(MODE_OPAQUE, key, prefix, suffix));
+ else
+ throw ModuleException(mode + " is an invalid value for <cloak:mode>; acceptable values are 'half' and 'full', at " + tag->getTagLocation());
+ }
+
+ // The cloak configuration was valid so we can apply it.
+ cloaks.swap(newcloaks);
+ }
+
+ std::string GenCloak(const CloakInfo& info, const irc::sockets::sockaddrs& ip, const std::string& ipstr, const std::string& host)
+ {
+ std::string chost;
+
+ irc::sockets::sockaddrs hostip;
+ bool host_is_ip = irc::sockets::aptosa(host, ip.port(), hostip) && hostip == ip;
+
+ switch (info.mode)
+ {
+ case MODE_HALF_CLOAK:
+ {
+ if (!host_is_ip)
+ chost = info.prefix + SegmentCloak(info, host, 1, 6) + VisibleDomainParts(host, info.domainparts);
+ if (chost.empty() || chost.length() > 50)
+ chost = SegmentIP(info, ip, false);
+ break;
+ }
+ case MODE_OPAQUE:
+ default:
+ chost = SegmentIP(info, ip, true);
+ }
+ return chost;
+ }
+
+ void OnSetUserIP(LocalUser* user) CXX11_OVERRIDE
+ {
+ // Connecting users are handled in OnUserConnect not here.
+ if (user->registered != REG_ALL)
+ return;
+
+ // Remove the cloaks and generate new ones.
+ cu.ext.unset(user);
+ OnUserConnect(user);
+
+ // If a user is using a cloak then update it.
+ if (user->IsModeSet(cu))
+ {
+ CloakList* cloaklist = cu.ext.get(user);
+ user->ChangeDisplayedHost(cloaklist->front());
+ }
+ }
+
+ void OnUserConnect(LocalUser* dest) CXX11_OVERRIDE
+ {
+ if (cu.ext.get(dest))
+ return;
+
+ // TODO: decide how we are going to cloak AF_UNIX hostnames.
+ if (dest->client_sa.family() != AF_INET && dest->client_sa.family() != AF_INET6)
+ return;
+
+ CloakList cloaklist;
+ for (std::vector<CloakInfo>::const_iterator iter = cloaks.begin(); iter != cloaks.end(); ++iter)
+ cloaklist.push_back(GenCloak(*iter, dest->client_sa, dest->GetIPString(), dest->GetRealHost()));
+ cu.ext.set(dest, cloaklist);
+ }
+};
+
+CmdResult CommandCloak::Handle(User* user, const Params& parameters)
+{
+ ModuleCloaking* mod = (ModuleCloaking*)(Module*)creator;
+
+ // If we're cloaking an IP address we pass it in the IP field too.
+ irc::sockets::sockaddrs sa;
+ const char* ipaddr = irc::sockets::aptosa(parameters[0], 0, sa) ? parameters[0].c_str() : "";
+
+ unsigned int id = 0;
+ for (std::vector<CloakInfo>::const_iterator iter = mod->cloaks.begin(); iter != mod->cloaks.end(); ++iter)
+ {
+ const std::string cloak = mod->GenCloak(*iter, sa, ipaddr, parameters[0]);
+ user->WriteNotice(InspIRCd::Format("*** Cloak #%u for %s is %s", ++id, parameters[0].c_str(), cloak.c_str()));
+ }
+ return CMD_SUCCESS;
+}
+
+MODULE_INIT(ModuleCloaking)
projects / user / henk / code / inspircd.git / blobdiff