]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/modules/extra/m_ssl_openssl.cpp
m_ssl_openssl Use the system default cipher list if no cipher list is specifed
[user/henk/code/inspircd.git] / src / modules / extra / m_ssl_openssl.cpp
index 25d1cd9dd1864c82838fe5e3996374457a47a0b1..649b425c2335a8eb22e90ac30a5b69c3c71823dd 100644 (file)
@@ -1,26 +1,42 @@
-/*       +------------------------------------+
- *       | Inspire Internet Relay Chat Daemon |
- *       +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
  *
- *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
+ *   Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
+ *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
  *
- * This program is free but copyrighted software; see
- *            the file COPYING for details.
+ * 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 <openssl/ssl.h>
 #include <openssl/err.h>
 #include "ssl.h"
 
 #ifdef WINDOWS
-#pragma comment(lib, "libeay32MTd")
-#pragma comment(lib, "ssleay32MTd")
-#undef MAX_DESCRIPTORS
-#define MAX_DESCRIPTORS 10000
+# pragma comment(lib, "libcrypto.lib")
+# pragma comment(lib, "libssl.lib")
+# pragma comment(lib, "user32.lib")
+# pragma comment(lib, "advapi32.lib")
+# pragma comment(lib, "libgcc.lib")
+# pragma comment(lib, "libmingwex.lib")
+# pragma comment(lib, "gdi32.lib")
+# undef MAX_DESCRIPTORS
+# define MAX_DESCRIPTORS 10000
 #endif
 
 /* $ModDesc: Provides SSL support for clients */
 /* $CompileFlags: if(!"USE_FREEBSD_BASE_SSL") pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
 /* $LinkerFlags: if(!"USE_FREEBSD_BASE_SSL") rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
 
-/* $ModDep: transport.h */
 /* $NoPedantic */
-/* $CopyInstall: conf/key.pem $(CONPATH) */
-/* $CopyInstall: conf/cert.pem $(CONPATH) */
 
 
 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
@@ -53,6 +66,7 @@ class issl_session
 public:
        SSL* sess;
        issl_status status;
+       reference<ssl_cert> cert;
 
        int fd;
        bool outbound;
@@ -89,19 +103,14 @@ class ModuleSSLOpenSSL : public Module
 
        char cipher[MAXBUF];
 
-       std::string keyfile;
-       std::string certfile;
-       std::string cafile;
-       // std::string crlfile;
-       std::string dhfile;
        std::string sslports;
+       bool use_sha;
 
+       ServiceProvider iohook;
  public:
 
-       ModuleSSLOpenSSL()
+       ModuleSSLOpenSSL() : iohook(this, "ssl/openssl", SERVICE_IOHOOK)
        {
-               ServerInstance->Modules->PublishInterface("BufferedSocketHook", this);
-
                sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
 
                // Not rehashable...because I cba to reduce all the sizes of existing buffers.
@@ -122,13 +131,15 @@ class ModuleSSLOpenSSL : public Module
 
                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
                SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
+       }
 
+       void init()
+       {
                // Needs the flag as it ignores a plain /rehash
                OnModuleRehash(NULL,"ssl");
-               Implementation eventlist[] = {
-                       I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnPostConnect,
-                       I_OnHookIO };
+               Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect };
                ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
+               ServerInstance->Modules->AddService(iohook);
        }
 
        void OnHookIO(StreamSocket* user, ListenSocket* lsb)
@@ -142,24 +153,27 @@ class ModuleSSLOpenSSL : public Module
 
        void OnRehash(User* user)
        {
-               ConfigReader Conf;
-
                sslports.clear();
 
-               for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+               ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
+               
+               if (Conf->getBool("showports", true))
                {
-                       ListenSocket* port = ServerInstance->ports[i];
-                       if (port->bind_tag->getString("ssl") != "openssl")
-                               continue;
-
-                       std::string portid = port->bind_desc;
-                       ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
-                       if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
-                               sslports.append(portid).append(";");
-               }
+                       for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+                       {
+                               ListenSocket* port = ServerInstance->ports[i];
+                               if (port->bind_tag->getString("ssl") != "openssl")
+                                       continue;
+
+                               std::string portid = port->bind_desc;
+                               ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
+                               if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
+                                       sslports.append(portid).append(";");
+                       }
 
-               if (!sslports.empty())
-                       sslports.erase(sslports.end() - 1);
+                       if (!sslports.empty())
+                               sslports.erase(sslports.end() - 1);
+               }
        }
 
        void OnModuleRehash(User* user, const std::string &param)
@@ -167,27 +181,33 @@ class ModuleSSLOpenSSL : public Module
                if (param != "ssl")
                        return;
 
+               std::string keyfile;
+               std::string certfile;
+               std::string cafile;
+               std::string dhfile;
                OnRehash(user);
 
-               ConfigReader Conf;
-
-               cafile   = Conf.ReadValue("openssl", "cafile", 0);
-               certfile = Conf.ReadValue("openssl", "certfile", 0);
-               keyfile  = Conf.ReadValue("openssl", "keyfile", 0);
-               dhfile   = Conf.ReadValue("openssl", "dhfile", 0);
-
-               // Set all the default values needed.
-               if (cafile.empty())
-                       cafile = "conf/ca.pem";
+               ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 
-               if (certfile.empty())
-                       certfile = "conf/cert.pem";
+               cafile   = conf->getString("cafile", "conf/ca.pem");
+               certfile = conf->getString("certfile", "conf/cert.pem");
+               keyfile  = conf->getString("keyfile", "conf/key.pem");
+               dhfile   = conf->getString("dhfile", "conf/dhparams.pem");
+               std::string hash = conf->getString("hash", "md5");
+               if (hash != "sha1" && hash != "md5")
+                       throw ModuleException("Unknown hash type " + hash);
+               use_sha = (hash == "sha1");
 
-               if (keyfile.empty())
-                       keyfile = "conf/key.pem";
+               std::string ciphers = conf->getString("ciphers", "");
 
-               if (dhfile.empty())
-                       dhfile = "conf/dhparams.pem";
+               if (!ciphers.empty())
+               {
+                       if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
+                       {
+                               ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
+                               ERR_print_errors_cb(error_callback, this);
+                       }
+               }
 
                /* Load our keys and certificates
                 * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
@@ -242,22 +262,35 @@ class ModuleSSLOpenSSL : public Module
        {
                SSL_CTX_free(ctx);
                SSL_CTX_free(clictx);
-               ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this);
                delete[] sessions;
        }
 
+       void OnUserConnect(LocalUser* user)
+       {
+               if (user->eh.GetIOHook() == this)
+               {
+                       if (sessions[user->eh.GetFd()].sess)
+                       {
+                               if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
+                                       user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
+                                               " and your SSL fingerprint is %s", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess), sessions[user->eh.GetFd()].cert->fingerprint.c_str());
+                               else
+                                       user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess));
+                       }
+               }
+       }
+
        void OnCleanup(int target_type, void* item)
        {
                if (target_type == TYPE_USER)
                {
-                       User* user = (User*)item;
+                       LocalUser* user = IS_LOCAL((User*)item);
 
-                       if (user->GetIOHook() == this)
+                       if (user && user->eh.GetIOHook() == this)
                        {
                                // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
                                // Potentially there could be multiple SSL modules loaded at once on different ports.
                                ServerInstance->Users->QuitUser(user, "SSL module unloading");
-                               user->DelIOHook();
                        }
                }
        }
@@ -267,14 +300,17 @@ class ModuleSSLOpenSSL : public Module
                return Version("Provides SSL support for clients", VF_VENDOR);
        }
 
-
        void OnRequest(Request& request)
        {
-               Module* sslinfo = ServerInstance->Modules->Find("m_sslinfo.so");
-               if (sslinfo)
-                       sslinfo->OnRequest(request);
-       }
+               if (strcmp("GET_SSL_CERT", request.id) == 0)
+               {
+                       SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
+                       int fd = req.sock->GetFd();
+                       issl_session* session = &sessions[fd];
 
+                       req.cert = session->cert;
+               }
+       }
 
        void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
        {
@@ -286,6 +322,7 @@ class ModuleSSLOpenSSL : public Module
                session->sess = SSL_new(ctx);
                session->status = ISSL_NONE;
                session->outbound = false;
+               session->cert = NULL;
 
                if (session->sess == NULL)
                        return;
@@ -369,10 +406,12 @@ class ModuleSSLOpenSSL : public Module
                        char* buffer = ServerInstance->GetReadBuffer();
                        size_t bufsiz = ServerInstance->Config->NetBufferSize;
                        int ret = SSL_read(session->sess, buffer, bufsiz);
-                       
+
                        if (ret > 0)
                        {
                                recvq.append(buffer, ret);
+                               if (session->data_to_write)
+                                       ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
                                return 1;
                        }
                        else if (ret == 0)
@@ -462,7 +501,7 @@ class ModuleSSLOpenSSL : public Module
                                }
                                else if (err == SSL_ERROR_WANT_READ)
                                {
-                                       ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+                                       ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
                                        return 0;
                                }
                                else
@@ -475,7 +514,7 @@ class ModuleSSLOpenSSL : public Module
                return 0;
        }
 
-       bool Handshake(EventHandler* user, issl_session* session)
+       bool Handshake(StreamSocket* user, issl_session* session)
        {
                int ret;
 
@@ -540,27 +579,23 @@ class ModuleSSLOpenSSL : public Module
                errno = EIO;
        }
 
-       void VerifyCertificate(issl_session* session, Extensible* user)
+       void VerifyCertificate(issl_session* session, StreamSocket* user)
        {
                if (!session->sess || !user)
                        return;
 
-               Module* sslinfo = ServerInstance->Modules->Find("m_sslinfo.so");
-               if (!sslinfo)
-                       return;
-
                X509* cert;
                ssl_cert* certinfo = new ssl_cert;
+               session->cert = certinfo;
                unsigned int n;
                unsigned char md[EVP_MAX_MD_SIZE];
-               const EVP_MD *digest = EVP_md5();
+               const EVP_MD *digest = use_sha ? EVP_sha1() : EVP_md5();
 
                cert = SSL_get_peer_certificate((SSL*)session->sess);
 
                if (!cert)
                {
                        certinfo->error = "Could not get peer certificate: "+std::string(get_error());
-                       SSLCertSubmission(user, this, sslinfo, certinfo);
                        return;
                }
 
@@ -595,15 +630,7 @@ class ModuleSSLOpenSSL : public Module
                }
 
                X509_free(cert);
-               SSLCertSubmission(user, this, sslinfo, certinfo);
        }
-
-       void Prioritize()
-       {
-               Module* server = ServerInstance->Modules->Find("m_spanningtree.so");
-               ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIORITY_AFTER, &server);
-       }
-
 };
 
 static int error_callback(const char *str, size_t len, void *u)