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)
  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                 ServerInstance->Modules->PublishInterface("SSLCertInfo", this);
 129         }
 130
 131         ~ModuleSSLInfo()
 132         {
 133                 ServerInstance->Modules->UnpublishInterface("SSLCertInfo", this);
 134         }
 135
 136         Version GetVersion()
 137         {
 138                 return Version("SSL Certificate Utilities", VF_VENDOR | VF_SERVICEPROVIDER);
 139         }
 140
 141         void OnWhois(User* source, User* dest)
 142         {
 143                 if (cmd.CertExt.get(dest))
 144                 {
 145                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
 146                 }
 147         }
 148
 149         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 150         {
 151                 std::stringstream hl(hostlist);
 152                 std::string xhost;
 153                 while (hl >> xhost)
 154                 {
 155                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 156                         {
 157                                 return true;
 158                         }
 159                 }
 160                 return false;
 161         }
 162
 163         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 164         {
 165                 irc::string pcmd = command.c_str();
 166
 167                 if ((pcmd == "OPER") && (validated))
 168                 {
 169                         ConfigReader cf;
 170                         char TheHost[MAXBUF];
 171                         char TheIP[MAXBUF];
 172                         std::string LoginName;
 173                         std::string Password;
 174                         std::string OperType;
 175                         std::string HostName;
 176                         std::string HashType;
 177                         std::string FingerPrint;
 178                         bool SSLOnly;
 179                         ssl_cert* cert = cmd.CertExt.get(user);
 180
 181                         snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
 182                         snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());
 183
 184                         for (int i = 0; i < cf.Enumerate("oper"); i++)
 185                         {
 186                                 LoginName = cf.ReadValue("oper", "name", i);
 187                                 Password = cf.ReadValue("oper", "password", i);
 188                                 OperType = cf.ReadValue("oper", "type", i);
 189                                 HostName = cf.ReadValue("oper", "host", i);
 190                                 HashType = cf.ReadValue("oper", "hash", i);
 191                                 FingerPrint = cf.ReadValue("oper", "fingerprint", i);
 192                                 SSLOnly = cf.ReadFlag("oper", "sslonly", i);
 193
 194                                 if (FingerPrint.empty() && !SSLOnly)
 195                                         continue;
 196
 197                                 if (LoginName != parameters[0])
 198                                         continue;
 199
 200                                 if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
 201                                         continue;
 202
 203                                 if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
 204                                         continue;
 205
 206                                 if (SSLOnly && !cert)
 207                                 {
 208                                         user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
 209                                         return MOD_RES_DENY;
 210                                 }
 211
 212                                 /*
 213                                  * No cert found or the fingerprint doesn't match
 214                                  */
 215                                 if ((!cert) || (cert->GetFingerprint() != FingerPrint))
 216                                 {
 217                                         user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
 218                                         ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
 219                                         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());
 220                                         return MOD_RES_DENY;
 221                                 }
 222                         }
 223                 }
 224
 225                 // Let core handle it for extra stuff
 226                 return MOD_RES_PASSTHRU;
 227         }
 228
 229         void OnRequest(Request& request)
 230         {
 231                 if (strcmp("GET_CERT", request.id) == 0)
 232                 {
 233                         SSLCertificateRequest& req = static_cast<SSLCertificateRequest&>(request);
 234                         req.cert = cmd.CertExt.get(req.item);
 235                 }
 236                 else if (strcmp("SET_CERT", request.id) == 0)
 237                 {
 238                         SSLCertSubmission& req = static_cast<SSLCertSubmission&>(request);
 239                         cmd.CertExt.set(req.item, req.cert);
 240                 }
 241         }
 242 };
 243
 244 MODULE_INIT(ModuleSSLInfo)
 245