src/modules/m_sslinfo.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "ssl.h"
  16
  17 /* $ModDesc: Provides SSL metadata, including /WHOIS information and /SSLINFO command */
  18
  19 class SSLCertExt : public ExtensionItem {
  20  public:
  21         SSLCertExt(Module* parent) : ExtensionItem("ssl_cert", parent) {}
  22         ssl_cert* get(const Extensible* item) const
  23         {
  24                 return static_cast<ssl_cert*>(get_raw(item));
  25         }
  26         void set(Extensible* item, ssl_cert* value)
  27         {
  28                 value->refcount_inc();
  29                 ssl_cert* old = static_cast<ssl_cert*>(set_raw(item, value));
  30                 if (old && old->refcount_dec())
  31                         delete old;
  32         }
  33
  34         std::string serialize(SerializeFormat format, const Extensible* container, void* item) const
  35         {
  36                 return static_cast<ssl_cert*>(item)->GetMetaLine();
  37         }
  38
  39         void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
  40         {
  41                 ssl_cert* cert = new ssl_cert;
  42                 set(container, cert);
  43
  44                 std::stringstream s(value);
  45                 std::string v;
  46                 getline(s,v,' ');
  47
  48                 cert->invalid = (v.find('v') != std::string::npos);
  49                 cert->trusted = (v.find('T') != std::string::npos);
  50                 cert->revoked = (v.find('R') != std::string::npos);
  51                 cert->unknownsigner = (v.find('s') != std::string::npos);
  52                 if (v.find('E') != std::string::npos)
  53                 {
  54                         getline(s,cert->error,'\n');
  55                 }
  56                 else
  57                 {
  58                         getline(s,cert->fingerprint,' ');
  59                         getline(s,cert->dn,' ');
  60                         getline(s,cert->issuer,'\n');
  61                 }
  62         }
  63
  64         void free(void* item)
  65         {
  66                 ssl_cert* old = static_cast<ssl_cert*>(item);
  67                 if (old && old->refcount_dec())
  68                         delete old;
  69         }
  70 };
  71
  72 /** Handle /SSLINFO
  73  */
  74 class CommandSSLInfo : public Command
  75 {
  76  public:
  77         SSLCertExt CertExt;
  78
  79         CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator)
  80         {
  81                 this->syntax = "<nick>";
  82         }
  83
  84         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  85         {
  86                 User* target = ServerInstance->FindNick(parameters[0]);
  87
  88                 if (target)
  89                 {
  90                         ssl_cert* cert = CertExt.get(target);
  91                         if (cert)
  92                         {
  93                                 if (cert->GetError().length())
  94                                 {
  95                                         user->WriteServ("NOTICE %s :*** No SSL certificate information for this user (%s).", user->nick.c_str(), cert->GetError().c_str());
  96                                 }
  97                                 else
  98                                 {
  99                                         user->WriteServ("NOTICE %s :*** Distinguised Name: %s", user->nick.c_str(), cert->GetDN().c_str());
 100                                         user->WriteServ("NOTICE %s :*** Issuer:            %s", user->nick.c_str(), cert->GetIssuer().c_str());
 101                                         user->WriteServ("NOTICE %s :*** Key Fingerprint:   %s", user->nick.c_str(), cert->GetFingerprint().c_str());
 102                                 }
 103                                 return CMD_SUCCESS;
 104                         }
 105                         else
 106                         {
 107                                 user->WriteServ("NOTICE %s :*** No SSL certificate information for this user.", user->nick.c_str());
 108                                 return CMD_FAILURE;
 109                         }
 110                 }
 111                 else
 112                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str());
 113
 114                 return CMD_FAILURE;
 115         }
 116 };
 117
 118 class ModuleSSLInfo : public Module
 119 {
 120         CommandSSLInfo cmd;
 121
 122  public:
 123         ModuleSSLInfo()
 124                 : cmd(this)
 125         {
 126                 ServerInstance->AddCommand(&cmd);
 127
 128                 ServerInstance->Extensions.Register(&cmd.CertExt);
 129
 130                 Implementation eventlist[] = { I_OnWhois, I_OnPreCommand };
 131                 ServerInstance->Modules->Attach(eventlist, this, 2);
 132                 ServerInstance->Modules->PublishInterface("SSLCertInfo", this);
 133         }
 134
 135         ~ModuleSSLInfo()
 136         {
 137                 ServerInstance->Modules->UnpublishInterface("SSLCertInfo", this);
 138         }
 139
 140         Version GetVersion()
 141         {
 142                 return Version("SSL Certificate Utilities", VF_VENDOR);
 143         }
 144
 145         void OnWhois(User* source, User* dest)
 146         {
 147                 if (cmd.CertExt.get(dest))
 148                 {
 149                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
 150                 }
 151         }
 152
 153         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 154         {
 155                 std::stringstream hl(hostlist);
 156                 std::string xhost;
 157                 while (hl >> xhost)
 158                 {
 159                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 160                         {
 161                                 return true;
 162                         }
 163                 }
 164                 return false;
 165         }
 166
 167         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 168         {
 169                 irc::string pcmd = command.c_str();
 170
 171                 if ((pcmd == "OPER") && (validated))
 172                 {
 173                         ConfigReader cf;
 174                         char TheHost[MAXBUF];
 175                         char TheIP[MAXBUF];
 176                         std::string LoginName;
 177                         std::string Password;
 178                         std::string OperType;
 179                         std::string HostName;
 180                         std::string HashType;
 181                         std::string FingerPrint;
 182                         bool SSLOnly;
 183                         ssl_cert* cert = cmd.CertExt.get(user);
 184
 185                         snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
 186                         snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());
 187
 188                         for (int i = 0; i < cf.Enumerate("oper"); i++)
 189                         {
 190                                 LoginName = cf.ReadValue("oper", "name", i);
 191                                 Password = cf.ReadValue("oper", "password", i);
 192                                 OperType = cf.ReadValue("oper", "type", i);
 193                                 HostName = cf.ReadValue("oper", "host", i);
 194                                 HashType = cf.ReadValue("oper", "hash", i);
 195                                 FingerPrint = cf.ReadValue("oper", "fingerprint", i);
 196                                 SSLOnly = cf.ReadFlag("oper", "sslonly", i);
 197
 198                                 if (FingerPrint.empty() && !SSLOnly)
 199                                         continue;
 200
 201                                 if (LoginName != parameters[0])
 202                                         continue;
 203
 204                                 if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
 205                                         continue;
 206
 207                                 if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
 208                                         continue;
 209
 210                                 if (SSLOnly && !cert)
 211                                 {
 212                                         user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
 213                                         return MOD_RES_DENY;
 214                                 }
 215
 216                                 /*
 217                                  * No cert found or the fingerprint doesn't match
 218                                  */
 219                                 if ((!cert) || (cert->GetFingerprint() != FingerPrint))
 220                                 {
 221                                         user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
 222                                         ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
 223                                         ServerInstance->Logs->Log("m_ssl_oper_cert",DEFAULT,"OPER: Failed oper attempt by %s!%s@%s: credentials valid, but wrong fingerprint.", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
 224                                         return MOD_RES_DENY;
 225                                 }
 226                         }
 227                 }
 228
 229                 // Let core handle it for extra stuff
 230                 return MOD_RES_PASSTHRU;
 231         }
 232
 233         void OnRequest(Request& request)
 234         {
 235                 if (strcmp("GET_USER_CERT", request.id) == 0)
 236                 {
 237                         UserCertificateRequest& req = static_cast<UserCertificateRequest&>(request);
 238                         req.cert = cmd.CertExt.get(req.user);
 239                 }
 240                 else if (strcmp("SET_CERT", request.id) == 0)
 241                 {
 242                         SSLCertSubmission& req = static_cast<SSLCertSubmission&>(request);
 243                         cmd.CertExt.set(req.item, req.cert);
 244                 }
 245         }
 246 };
 247
 248 MODULE_INIT(ModuleSSLInfo)
 249