-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
- *
- * InspIRCd: (C) 2002-2007 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
- *
- * This program is free but copyrighted software; see
- * the file COPYING for details.
- *
- * ---------------------------------------------------
- */
-
-#include "inspircd.h"
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "m_hash.h"
-
-/* $ModDesc: Provides masking of user hostnames */
-/* $ModDep: m_hash.h */
-
-/* Used to vary the output a little more depending on the cloak keys */
-static const char* xtab[] = {"F92E45D871BCA630", "A1B9D80C72E653F4", "1ABC078934DEF562", "ABCDEF5678901234"};
-
-/** Handles user mode +x
- */
-class CloakUser : public ModeHandler
-{
-
- std::string prefix;
- unsigned int key1;
- unsigned int key2;
- unsigned int key3;
- unsigned int key4;
- Module* Sender;
- Module* HashProvider;
-
- /** 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)
- {
- int dots = 0;
- std::string::size_type splitdot = host.length();
-
- for (std::string::size_type x = host.length() - 1; x; --x)
- {
- if (host[x] == '.')
- {
- splitdot = x;
- dots++;
- }
- if (dots >= 3)
- break;
- }
-
- if (splitdot == host.length())
- return 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)
- {
- }
-
- ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* 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.
- */
- if (!IS_LOCAL(dest))
- return MODEACTION_ALLOW;
-
- if (adding)
- {
- if(!dest->IsModeSet('x'))
- {
- /* The mode is being turned on - so attempt to
- * allocate the user a cloaked host using a non-reversible
- * algorithm (its simple, but its non-reversible so the
- * simplicity doesnt really matter). This algorithm
- * will not work if the user has only one level of domain
- * naming in their hostname (e.g. if they are on a lan or
- * are connecting via localhost) -- this doesnt matter much.
- */
-
- char* n1 = strchr(dest->host,'.');
- char* n2 = strchr(dest->host,':');
-
- if (n1 || n2)
- {
- /* 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.
- */
-
- unsigned int iv[] = { key1, key2, key3, key4 };
- std::string a = LastTwoDomainParts(dest->host);
- std::string b;
-
- /** 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
-
- dest->ChangeDisplayedHost(b.c_str());
- }
-
- 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.
- */
- dest->ChangeDisplayedHost(dest->host);
- dest->SetMode('x',false);
- return MODEACTION_ALLOW;
- }
- }
-
- return MODEACTION_DENY;
- }
-
- std::string Cloak4(const char* ip)
- {
- unsigned int iv[] = { key1, key2, key3, key4 };
- irc::sepstream seps(ip, '.');
- std::string ra[4];;
- std::string octet[4];
- int i[4];
-
- for (int j = 0; j < 4; j++)
- {
- octet[j] = seps.GetToken();
- i[j] = atoi(octet[j].c_str());
- }
-
- octet[3] = octet[0] + "." + octet[1] + "." + octet[2] + "." + octet[3];
- octet[2] = octet[0] + "." + octet[1] + "." + octet[2];
- octet[1] = octet[0] + "." + octet[1];
-
- /* Reset the Hash module and send it our IV */
- HashResetRequest(Sender, HashProvider).Send();
- HashKeyRequest(Sender, 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);
- }
- /* 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();
-
- for (const char* input = ip; *input; input++)
- {
- item += *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));
- 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));
- item.clear();
- }
- /* Stick them all together */
- return irc::stringjoiner(":", hashies, 0, hashies.size() - 1).GetJoined();
- }
-
- void DoRehash()
- {
- ConfigReader Conf(ServerInstance);
- key1 = key2 = key3 = key4 = 0;
- key1 = Conf.ReadInteger("cloak","key1",0,true);
- key2 = Conf.ReadInteger("cloak","key2",0,true);
- key3 = Conf.ReadInteger("cloak","key3",0,true);
- key4 = Conf.ReadInteger("cloak","key4",0,true);
- prefix = Conf.ReadValue("cloak","prefix",0);
-
- if (prefix.empty())
- prefix = ServerInstance->Config->Network;
-
- if (!key1 && !key2 && !key3 && !key4)
- throw ModuleException("You have not defined cloak keys for m_cloaking!!! THIS IS INSECURE AND SHOULD BE CHECKED!");
- }
-};
-
-
-class ModuleCloaking : public Module
-{
- private:
-
- CloakUser* cu;
- Module* HashModule;
-
- public:
- ModuleCloaking(InspIRCd* Me)
- : Module(Me)
- {
- ServerInstance->UseInterface("HashRequest");
-
- /* Attempt to locate the md5 service provider, bail if we can't find it */
- HashModule = ServerInstance->FindModule("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);
-
- /* Register it with the core */
- if (!ServerInstance->AddMode(cu, 'x'))
- throw ModuleException("Could not add new modes!");
-
- OnRehash(NULL,"");
- }
-
- virtual ~ModuleCloaking()
- {
- ServerInstance->Modes->DelMode(cu);
- DELETE(cu);
- ServerInstance->DoneWithInterface("HashRequest");
- }
-
- virtual 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);
- }
-
- virtual void OnRehash(userrec* user, const std::string ¶meter)
- {
- cu->DoRehash();
- }
-
- void Implements(char* List)
- {
- List[I_OnRehash] = 1;
- }
-};
-
-MODULE_INIT(ModuleCloaking)
+/* +------------------------------------+\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
projects / user / henk / code / inspircd.git / blobdiff