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