/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
*
* 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/ssl.h"
class SSLCertExt : public ExtensionItem {
public:
SSLCertExt(Module* parent)
: ExtensionItem("ssl_cert", ExtensionItem::EXT_USER, parent)
{
}
ssl_cert* get(const Extensible* item) const
{
return static_cast<ssl_cert*>(get_raw(item));
}
void set(Extensible* item, ssl_cert* value)
{
value->refcount_inc();
ssl_cert* old = static_cast<ssl_cert*>(set_raw(item, value));
if (old && old->refcount_dec())
delete old;
}
std::string serialize(SerializeFormat format, const Extensible* container, void* item) const
{
return static_cast<ssl_cert*>(item)->GetMetaLine();
}
void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
{
ssl_cert* cert = new ssl_cert;
set(container, cert);
std::stringstream s(value);
std::string v;
getline(s,v,' ');
cert->invalid = (v.find('v') != std::string::npos);
cert->trusted = (v.find('T') != std::string::npos);
cert->revoked = (v.find('R') != std::string::npos);
cert->unknownsigner = (v.find('s') != std::string::npos);
if (v.find('E') != std::string::npos)
{
getline(s,cert->error,'\n');
}
else
{
getline(s,cert->fingerprint,' ');
getline(s,cert->dn,' ');
getline(s,cert->issuer,'\n');
}
}
void free(void* item)
{
ssl_cert* old = static_cast<ssl_cert*>(item);
if (old && old->refcount_dec())
delete old;
}
};
/** Handle /SSLINFO
*/
class CommandSSLInfo : public Command
{
public:
SSLCertExt CertExt;
CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator)
{
this->syntax = "<nick>";
}
CmdResult Handle (const std::vector<std::string> ¶meters, User *user)
{
User* target = ServerInstance->FindNickOnly(parameters[0]);
if ((!target) || (target->registered != REG_ALL))
{
user->WriteNumeric(Numerics::NoSuchNick(parameters[0]));
return CMD_FAILURE;
}
bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
if (operonlyfp && !user->IsOper() && target != user)
{
user->WriteNotice("*** You cannot view SSL certificate information for other users");
return CMD_FAILURE;
}
ssl_cert* cert = CertExt.get(target);
if (!cert)
{
user->WriteNotice("*** No SSL certificate for this user");
}
else if (cert->GetError().length())
{
user->WriteNotice("*** No SSL certificate information for this user (" + cert->GetError() + ").");
}
else
{
user->WriteNotice("*** Distinguished Name: " + cert->GetDN());
user->WriteNotice("*** Issuer: " + cert->GetIssuer());
user->WriteNotice("*** Key Fingerprint: " + cert->GetFingerprint());
}
return CMD_SUCCESS;
}
};
class UserCertificateAPIImpl : public UserCertificateAPIBase
{
SSLCertExt& ext;
public:
UserCertificateAPIImpl(Module* mod, SSLCertExt& certext)
: UserCertificateAPIBase(mod), ext(certext)
{
}
ssl_cert* GetCertificate(User* user) CXX11_OVERRIDE
{
return ext.get(user);
}
};
class ModuleSSLInfo : public Module, public Whois::EventListener
{
CommandSSLInfo cmd;
UserCertificateAPIImpl APIImpl;
public:
ModuleSSLInfo()
: Whois::EventListener(this)
, cmd(this)
, APIImpl(this, cmd.CertExt)
{
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("SSL Certificate Utilities", VF_VENDOR);
}
void OnWhois(Whois::Context& whois) CXX11_OVERRIDE
{
ssl_cert* cert = cmd.CertExt.get(whois.GetTarget());
if (cert)
{
whois.SendLine(671, "is using a secure connection");
bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
if ((!operonlyfp || whois.IsSelfWhois() || whois.GetSource()->IsOper()) && !cert->fingerprint.empty())
whois.SendLine(276, InspIRCd::Format("has client certificate fingerprint %s", cert->fingerprint.c_str()));
}
}
ModResult OnPreCommand(std::string &command, std::vector<std::string> ¶meters, LocalUser *user, bool validated, const std::string &original_line) CXX11_OVERRIDE
{
if ((command == "OPER") && (validated))
{
ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]);
if (i != ServerInstance->Config->oper_blocks.end())
{
OperInfo* ifo = i->second;
ssl_cert* cert = cmd.CertExt.get(user);
if (ifo->oper_block->getBool("sslonly") && !cert)
{
user->WriteNumeric(491, "This oper login requires an SSL connection.");
user->CommandFloodPenalty += 10000;
return MOD_RES_DENY;
}
std::string fingerprint;
if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint))
{
user->WriteNumeric(491, "This oper login requires a matching SSL certificate fingerprint.");
user->CommandFloodPenalty += 10000;
return MOD_RES_DENY;
}
}
}
// Let core handle it for extra stuff
return MOD_RES_PASSTHRU;
}
void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
{
ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
if (cert)
cmd.CertExt.set(user, cert);
}
void OnPostConnect(User* user) CXX11_OVERRIDE
{
LocalUser* const localuser = IS_LOCAL(user);
if (!localuser)
return;
const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(&localuser->eh);
if (!ssliohook)
return;
ssl_cert* const cert = ssliohook->GetCertificate();
{
std::string text = "*** You are connected to ";
if (!ssliohook->GetServerName(text))
text.append(ServerInstance->Config->ServerName);
text.append(" using SSL cipher '");
ssliohook->GetCiphersuite(text);
text.push_back('\'');
if ((cert) && (!cert->GetFingerprint().empty()))
text.append(" and your SSL certificate fingerprint is ").append(cert->GetFingerprint());
user->WriteNotice(text);
}
if (!cert)
return;
// find an auto-oper block for this user
for (ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); ++i)
{
OperInfo* ifo = i->second;
std::string fp = ifo->oper_block->getString("fingerprint");
if (fp == cert->fingerprint && ifo->oper_block->getBool("autologin"))
user->Oper(ifo);
}
}
ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE
{
ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
bool ok = true;
if (myclass->config->getString("requiressl") == "trusted")
{
ok = (cert && cert->IsCAVerified());
}
else if (myclass->config->getBool("requiressl"))
{
ok = (cert != NULL);
}
if (!ok)
return MOD_RES_DENY;
return MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModuleSSLInfo)
