/* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
/* $LinkerFlags: rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto") */
+#if ((OPENSSL_VERSION_NUMBER >= 0x10000000L) && (!(defined(OPENSSL_NO_ECDH))))
+// OpenSSL 0.9.8 includes some ECC support, but it's unfinished. Enable only for 1.0.0 and later.
+#define INSPIRCD_OPENSSL_ENABLE_ECDH
+#endif
+
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
static bool SelfSigned = false;
#endif
ctx_options = SSL_CTX_set_options(ctx, opts);
- SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+
+ long mode = SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
+#ifdef SSL_MODE_RELEASE_BUFFERS
+ mode |= SSL_MODE_RELEASE_BUFFERS;
+#endif
+ SSL_CTX_set_mode(ctx, mode);
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
SSL_CTX_set_info_callback(ctx, StaticSSLInfoCallback);
return SSL_CTX_clear_options(ctx, clearoptions);
}
- SSL* CreateSession()
+ SSL* CreateServerSession()
+ {
+ SSL* sess = SSL_new(ctx);
+ SSL_set_accept_state(sess); // Act as server
+ return sess;
+ }
+
+ SSL* CreateClientSession()
{
- return SSL_new(ctx);
+ SSL* sess = SSL_new(ctx);
+ SSL_set_connect_state(sess); // Act as client
+ return sess;
}
};
*/
const bool allowrenego;
+ /** Rough max size of records to send
+ */
+ const unsigned int outrecsize;
+
static int error_callback(const char* str, size_t len, void* u)
{
Profile* profile = reinterpret_cast<Profile*>(u);
long setoptions = tag->getInt(ctxname + "setoptions");
long clearoptions = tag->getInt(ctxname + "clearoptions");
#ifdef SSL_OP_NO_COMPRESSION
- if (!tag->getBool("compression", true))
+ if (!tag->getBool("compression", false)) // Disable compression by default
setoptions |= SSL_OP_NO_COMPRESSION;
#endif
- if (!tag->getBool("sslv3", true))
+ if (!tag->getBool("sslv3", false)) // Disable SSLv3 by default
setoptions |= SSL_OP_NO_SSLv3;
if (!tag->getBool("tlsv1", true))
setoptions |= SSL_OP_NO_TLSv1;
, dh(ServerInstance->Config->Paths.PrependConfig(tag->getString("dhfile", "dh.pem")))
, ctx(SSL_CTX_new(SSLv23_server_method()))
, clictx(SSL_CTX_new(SSLv23_client_method()))
- , allowrenego(tag->getBool("renegotiation", true))
+ , allowrenego(tag->getBool("renegotiation")) // Disallow by default
+ , outrecsize(tag->getInt("outrecsize", 2048, 512, 16384))
{
if ((!ctx.SetDH(dh)) || (!clictx.SetDH(dh)))
throw Exception("Couldn't set DH parameters");
}
const std::string& GetName() const { return name; }
- SSL* CreateServerSession() { return ctx.CreateSession(); }
- SSL* CreateClientSession() { return clictx.CreateSession(); }
+ SSL* CreateServerSession() { return ctx.CreateServerSession(); }
+ SSL* CreateClientSession() { return clictx.CreateClientSession(); }
const EVP_MD* GetDigest() { return digest; }
bool AllowRenegotiation() const { return allowrenego; }
+ unsigned int GetOutgoingRecordSize() const { return outrecsize; }
};
+
+ namespace BIOMethod
+ {
+ static int create(BIO* bio)
+ {
+ bio->init = 1;
+ return 1;
+ }
+
+ static int destroy(BIO* bio)
+ {
+ // XXX: Dummy function to avoid a memory leak in OpenSSL.
+ // The memory leak happens in BIO_free() (bio_lib.c) when the destroy func of the BIO is NULL.
+ // This is fixed in OpenSSL but some distros still ship the unpatched version hence we provide this workaround.
+ return 1;
+ }
+
+ static long ctrl(BIO* bio, int cmd, long num, void* ptr)
+ {
+ if (cmd == BIO_CTRL_FLUSH)
+ return 1;
+ return 0;
+ }
+
+ static int read(BIO* bio, char* buf, int len);
+ static int write(BIO* bio, const char* buf, int len);
+ }
}
+static BIO_METHOD biomethods =
+{
+ (100 | BIO_TYPE_SOURCE_SINK),
+ "inspircd",
+ OpenSSL::BIOMethod::write,
+ OpenSSL::BIOMethod::read,
+ NULL, // puts
+ NULL, // gets
+ OpenSSL::BIOMethod::ctrl,
+ OpenSSL::BIOMethod::create,
+ OpenSSL::BIOMethod::destroy, // destroy, does nothing, see function body for more info
+ NULL // callback_ctrl
+};
+
static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
{
/* XXX: This will allow self signed certificates.
private:
SSL* sess;
issl_status status;
- const bool outbound;
bool data_to_write;
reference<OpenSSL::Profile> profile;
- bool Handshake(StreamSocket* user)
+ // Returns 1 if handshake succeeded, 0 if it is still in progress, -1 if it failed
+ int Handshake(StreamSocket* user)
{
- int ret;
-
ERR_clear_error();
- if (outbound)
- ret = SSL_connect(sess);
- else
- ret = SSL_accept(sess);
-
+ int ret = SSL_do_handshake(sess);
if (ret < 0)
{
int err = SSL_get_error(sess, ret);
{
SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
this->status = ISSL_HANDSHAKING;
- return true;
+ return 0;
}
else if (err == SSL_ERROR_WANT_WRITE)
{
SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
this->status = ISSL_HANDSHAKING;
- return true;
+ return 0;
}
else
{
CloseSession();
+ return -1;
}
-
- return false;
}
else if (ret > 0)
{
SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
- return true;
+ return 1;
}
else if (ret == 0)
{
CloseSession();
}
- return false;
+ return -1;
}
void CloseSession()
X509_free(cert);
}
-#ifdef INSPIRCD_OPENSSL_ENABLE_RENEGO_DETECTION
void SSLInfoCallback(int where, int rc)
{
if ((where & SSL_CB_HANDSHAKE_START) && (status == ISSL_OPEN))
// The other side is trying to renegotiate, kill the connection and change status
// to ISSL_NONE so CheckRenego() closes the session
status = ISSL_NONE;
- SocketEngine::Shutdown(SSL_get_fd(sess), 2);
+ BIO* bio = SSL_get_rbio(sess);
+ EventHandler* eh = static_cast<StreamSocket*>(bio->ptr);
+ SocketEngine::Shutdown(eh, 2);
}
}
sock->SetError("Renegotiation is not allowed");
return false;
}
-#endif
+
+ // Returns 1 if application I/O should proceed, 0 if it must wait for the underlying protocol to progress, -1 on fatal error
+ int PrepareIO(StreamSocket* sock)
+ {
+ if (status == ISSL_OPEN)
+ return 1;
+ else if (status == ISSL_HANDSHAKING)
+ {
+ // The handshake isn't finished, try to finish it
+ return Handshake(sock);
+ }
+
+ CloseSession();
+ return -1;
+ }
// Calls our private SSLInfoCallback()
friend void StaticSSLInfoCallback(const SSL* ssl, int where, int rc);
public:
- OpenSSLIOHook(IOHookProvider* hookprov, StreamSocket* sock, bool is_outbound, SSL* session, const reference<OpenSSL::Profile>& sslprofile)
+ OpenSSLIOHook(IOHookProvider* hookprov, StreamSocket* sock, SSL* session, const reference<OpenSSL::Profile>& sslprofile)
: SSLIOHook(hookprov)
, sess(session)
, status(ISSL_NONE)
- , outbound(is_outbound)
, data_to_write(false)
, profile(sslprofile)
{
- if (sess == NULL)
- return;
- if (SSL_set_fd(sess, sock->GetFd()) == 0)
- throw ModuleException("Can't set fd with SSL_set_fd: " + ConvToStr(sock->GetFd()));
+ // Create BIO instance and store a pointer to the socket in it which will be used by the read and write functions
+ BIO* bio = BIO_new(&biomethods);
+ bio->ptr = sock;
+ SSL_set_bio(sess, bio, bio);
SSL_set_ex_data(sess, exdataindex, this);
sock->AddIOHook(this);
int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
{
- if (!sess)
- {
- CloseSession();
- return -1;
- }
-
- if (status == ISSL_HANDSHAKING)
- {
- // The handshake isn't finished and it wants to read, try to finish it.
- if (!Handshake(user))
- {
- // Couldn't resume handshake.
- if (status == ISSL_NONE)
- return -1;
- return 0;
- }
- }
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
// If we resumed the handshake then this->status will be ISSL_OPEN
-
- if (status == ISSL_OPEN)
{
ERR_clear_error();
char* buffer = ServerInstance->GetReadBuffer();
size_t bufsiz = ServerInstance->Config->NetBufferSize;
int ret = SSL_read(sess, buffer, bufsiz);
-#ifdef INSPIRCD_OPENSSL_ENABLE_RENEGO_DETECTION
if (!CheckRenego(user))
return -1;
-#endif
if (ret > 0)
{
user->SetError("Connection closed");
return -1;
}
- else if (ret < 0)
+ else // if (ret < 0)
{
int err = SSL_get_error(sess, ret);
}
}
}
-
- return 0;
}
- int OnStreamSocketWrite(StreamSocket* user, std::string& buffer) CXX11_OVERRIDE
+ int OnStreamSocketWrite(StreamSocket* user) CXX11_OVERRIDE
{
- if (!sess)
- {
- CloseSession();
- return -1;
- }
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
data_to_write = true;
- if (status == ISSL_HANDSHAKING)
- {
- if (!Handshake(user))
- {
- // Couldn't resume handshake.
- if (status == ISSL_NONE)
- return -1;
- return 0;
- }
- }
-
- if (status == ISSL_OPEN)
+ // Session is ready for transferring application data
+ StreamSocket::SendQueue& sendq = user->GetSendQ();
+ while (!sendq.empty())
{
ERR_clear_error();
+ FlattenSendQueue(sendq, profile->GetOutgoingRecordSize());
+ const StreamSocket::SendQueue::Element& buffer = sendq.front();
int ret = SSL_write(sess, buffer.data(), buffer.size());
-#ifdef INSPIRCD_OPENSSL_ENABLE_RENEGO_DETECTION
if (!CheckRenego(user))
return -1;
-#endif
if (ret == (int)buffer.length())
{
- data_to_write = false;
- SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
- return 1;
+ // Wrote entire record, continue sending
+ sendq.pop_front();
}
else if (ret > 0)
{
- buffer = buffer.substr(ret);
+ sendq.erase_front(ret);
SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
return 0;
}
CloseSession();
return -1;
}
- else if (ret < 0)
+ else // if (ret < 0)
{
int err = SSL_get_error(sess, ret);
}
}
}
- return 0;
+
+ data_to_write = false;
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+ return 1;
}
void TellCiphersAndFingerprint(LocalUser* user)
{
if (sess)
{
- std::string text = "*** You are connected using SSL cipher '" + std::string(SSL_get_cipher(sess)) + "'";
+ std::string text = "*** You are connected using SSL cipher '";
+ GetCiphersuite(text);
+ text += '\'';
const std::string& fingerprint = certificate->fingerprint;
if (!fingerprint.empty())
text += " and your SSL certificate fingerprint is " + fingerprint;
user->WriteNotice(text);
}
}
+
+ void GetCiphersuite(std::string& out) const
+ {
+ out.append(SSL_get_version(sess)).push_back('-');
+ out.append(SSL_get_cipher(sess));
+ }
+
+ bool IsHandshakeDone() const { return (status == ISSL_OPEN); }
};
static void StaticSSLInfoCallback(const SSL* ssl, int where, int rc)
{
-#ifdef INSPIRCD_OPENSSL_ENABLE_RENEGO_DETECTION
OpenSSLIOHook* hook = static_cast<OpenSSLIOHook*>(SSL_get_ex_data(ssl, exdataindex));
hook->SSLInfoCallback(where, rc);
-#endif
+}
+
+static int OpenSSL::BIOMethod::write(BIO* bio, const char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
+
+ StreamSocket* sock = static_cast<StreamSocket*>(bio->ptr);
+ if (sock->GetEventMask() & FD_WRITE_WILL_BLOCK)
+ {
+ // Writes blocked earlier, don't retry syscall
+ BIO_set_retry_write(bio);
+ return -1;
+ }
+
+ int ret = SocketEngine::Send(sock, buffer, size, 0);
+ if ((ret < size) && ((ret > 0) || (SocketEngine::IgnoreError())))
+ {
+ // Blocked, set retry flag for OpenSSL
+ SocketEngine::ChangeEventMask(sock, FD_WRITE_WILL_BLOCK);
+ BIO_set_retry_write(bio);
+ }
+
+ return ret;
+}
+
+static int OpenSSL::BIOMethod::read(BIO* bio, char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
+
+ StreamSocket* sock = static_cast<StreamSocket*>(bio->ptr);
+ if (sock->GetEventMask() & FD_READ_WILL_BLOCK)
+ {
+ // Reads blocked earlier, don't retry syscall
+ BIO_set_retry_read(bio);
+ return -1;
+ }
+
+ int ret = SocketEngine::Recv(sock, buffer, size, 0);
+ if ((ret < size) && ((ret > 0) || (SocketEngine::IgnoreError())))
+ {
+ // Blocked, set retry flag for OpenSSL
+ SocketEngine::ChangeEventMask(sock, FD_READ_WILL_BLOCK);
+ BIO_set_retry_read(bio);
+ }
+
+ return ret;
}
class OpenSSLIOHookProvider : public refcountbase, public IOHookProvider
void OnAccept(StreamSocket* sock, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
{
- new OpenSSLIOHook(this, sock, false, profile->CreateServerSession(), profile);
+ new OpenSSLIOHook(this, sock, profile->CreateServerSession(), profile);
}
void OnConnect(StreamSocket* sock) CXX11_OVERRIDE
{
- new OpenSSLIOHook(this, sock, true, profile->CreateClientSession(), profile);
+ new OpenSSLIOHook(this, sock, profile->CreateClientSession(), profile);
}
};
void init() CXX11_OVERRIDE
{
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "OpenSSL lib version \"%s\" module was compiled for \"" OPENSSL_VERSION_TEXT "\"", SSLeay_version(SSLEAY_VERSION));
+
// Register application specific data
char exdatastr[] = "inspircd";
exdataindex = SSL_get_ex_new_index(0, exdatastr, NULL, NULL, NULL);
}
}
+ ModResult OnCheckReady(LocalUser* user) CXX11_OVERRIDE
+ {
+ if ((user->eh.GetIOHook()) && (user->eh.GetIOHook()->prov->creator == this))
+ {
+ OpenSSLIOHook* iohook = static_cast<OpenSSLIOHook*>(user->eh.GetIOHook());
+ if (!iohook->IsHandshakeDone())
+ return MOD_RES_DENY;
+ }
+
+ return MOD_RES_PASSTHRU;
+ }
+
Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides SSL support for clients", VF_VENDOR);
projects / user / henk / code / inspircd.git / blobdiff