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-rw-r--r--src/Bindings/LuaState.cpp12
-rw-r--r--src/Bindings/LuaState.h2
-rw-r--r--src/Bindings/LuaTCPLink.cpp201
-rw-r--r--src/Bindings/LuaTCPLink.h55
-rw-r--r--src/Bindings/ManualBindings_Network.cpp56
-rw-r--r--src/Globals.h3
-rw-r--r--src/HTTPServer/SslHTTPConnection.cpp9
-rw-r--r--src/HTTPServer/SslHTTPConnection.h2
-rw-r--r--src/PolarSSL++/CryptoKey.cpp2
9 files changed, 335 insertions, 7 deletions
diff --git a/src/Bindings/LuaState.cpp b/src/Bindings/LuaState.cpp
index 73b114599..81770058c 100644
--- a/src/Bindings/LuaState.cpp
+++ b/src/Bindings/LuaState.cpp
@@ -343,6 +343,18 @@ bool cLuaState::PushFunction(const cTableRef & a_TableRef)
+void cLuaState::PushNil(void)
+{
+ ASSERT(IsValid());
+
+ lua_pushnil(m_LuaState);
+ m_NumCurrentFunctionArgs += 1;
+}
+
+
+
+
+
void cLuaState::Push(const AString & a_String)
{
ASSERT(IsValid());
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index f68b022ea..7fc3197eb 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -184,6 +184,8 @@ public:
/** Returns true if a_FunctionName is a valid Lua function that can be called */
bool HasFunction(const char * a_FunctionName);
+ void PushNil(void);
+
// Push a const value onto the stack (keep alpha-sorted):
void Push(const AString & a_String);
void Push(const AStringVector & a_Vector);
diff --git a/src/Bindings/LuaTCPLink.cpp b/src/Bindings/LuaTCPLink.cpp
index 6b8395806..7e2c10e13 100644
--- a/src/Bindings/LuaTCPLink.cpp
+++ b/src/Bindings/LuaTCPLink.cpp
@@ -64,6 +64,13 @@ cLuaTCPLink::~cLuaTCPLink()
bool cLuaTCPLink::Send(const AString & a_Data)
{
+ // If running in SSL mode, push the data into the SSL context instead:
+ if (m_SslContext != nullptr)
+ {
+ m_SslContext->Send(a_Data);
+ return true;
+ }
+
// Safely grab a copy of the link:
cTCPLinkPtr Link = m_Link;
if (Link == nullptr)
@@ -179,6 +186,58 @@ void cLuaTCPLink::Close(void)
+AString cLuaTCPLink::StartTLSClient(
+ const AString & a_OwnCertData,
+ const AString & a_OwnPrivKeyData,
+ const AString & a_OwnPrivKeyPassword
+)
+{
+ // Check preconditions:
+ if (m_SslContext != nullptr)
+ {
+ return "TLS is already active on this link";
+ }
+ if (
+ (a_OwnCertData.empty() && !a_OwnPrivKeyData.empty()) ||
+ (!a_OwnCertData.empty() && a_OwnPrivKeyData.empty())
+ )
+ {
+ return "Either provide both the certificate and private key, or neither";
+ }
+
+ // Create the SSL context:
+ m_SslContext = std::make_unique<cLinkSslContext>(*this);
+ m_SslContext->Initialize(true);
+
+ // Create the peer cert, if required:
+ if (!a_OwnCertData.empty() && !a_OwnPrivKeyData.empty())
+ {
+ auto OwnCert = std::make_shared<cX509Cert>();
+ int res = OwnCert->Parse(a_OwnCertData.data(), a_OwnCertData.size());
+ if (res != 0)
+ {
+ m_SslContext.reset();
+ return Printf("Cannot parse peer certificate: -0x%x", res);
+ }
+ auto OwnPrivKey = std::make_shared<cCryptoKey>();
+ res = OwnPrivKey->ParsePrivate(a_OwnPrivKeyData.data(), a_OwnPrivKeyData.size(), a_OwnPrivKeyPassword);
+ if (res != 0)
+ {
+ m_SslContext.reset();
+ return Printf("Cannot parse peer private key: -0x%x", res);
+ }
+ m_SslContext->SetOwnCert(OwnCert, OwnPrivKey);
+ }
+
+ // Start the handshake:
+ m_SslContext->Handshake();
+ return "";
+}
+
+
+
+
+
void cLuaTCPLink::Terminated(void)
{
// Disable the callbacks:
@@ -207,6 +266,26 @@ void cLuaTCPLink::Terminated(void)
+void cLuaTCPLink::ReceivedCleartextData(const char * a_Data, size_t a_NumBytes)
+{
+ // Check if we're still valid:
+ if (!m_Callbacks.IsValid())
+ {
+ return;
+ }
+
+ // Call the callback:
+ cPluginLua::cOperation Op(m_Plugin);
+ if (!Op().Call(cLuaState::cTableRef(m_Callbacks, "OnReceivedData"), this, AString(a_Data, a_NumBytes)))
+ {
+ LOGINFO("cTCPLink OnReceivedData callback failed in plugin %s.", m_Plugin.GetName().c_str());
+ }
+}
+
+
+
+
+
void cLuaTCPLink::OnConnected(cTCPLink & a_Link)
{
// Check if we're still valid:
@@ -269,6 +348,13 @@ void cLuaTCPLink::OnReceivedData(const char * a_Data, size_t a_Length)
return;
}
+ // If we're running in SSL mode, put the data into the SSL decryptor:
+ if (m_SslContext != nullptr)
+ {
+ m_SslContext->StoreReceivedData(a_Data, a_Length);
+ return;
+ }
+
// Call the callback:
cPluginLua::cOperation Op(m_Plugin);
if (!Op().Call(cLuaState::cTableRef(m_Callbacks, "OnReceivedData"), this, AString(a_Data, a_Length)))
@@ -302,3 +388,118 @@ void cLuaTCPLink::OnRemoteClosed(void)
+
+////////////////////////////////////////////////////////////////////////////////
+// cLuaTCPLink::cLinkSslContext:
+
+cLuaTCPLink::cLinkSslContext::cLinkSslContext(cLuaTCPLink & a_Link):
+ m_Link(a_Link)
+{
+}
+
+
+
+
+
+void cLuaTCPLink::cLinkSslContext::StoreReceivedData(const char * a_Data, size_t a_NumBytes)
+{
+ m_EncryptedData.append(a_Data, a_NumBytes);
+
+ // Try to finish a pending handshake:
+ TryFinishHandshaking();
+
+ // Flush any cleartext data that can be "received":
+ FlushBuffers();
+}
+
+
+
+
+
+void cLuaTCPLink::cLinkSslContext::FlushBuffers(void)
+{
+ // If the handshake didn't complete yet, bail out:
+ if (!HasHandshaken())
+ {
+ return;
+ }
+
+ char Buffer[1024];
+ int NumBytes;
+ while ((NumBytes = ReadPlain(Buffer, sizeof(Buffer))) > 0)
+ {
+ m_Link.ReceivedCleartextData(Buffer, static_cast<size_t>(NumBytes));
+ }
+}
+
+
+
+
+
+void cLuaTCPLink::cLinkSslContext::TryFinishHandshaking(void)
+{
+ // If the handshake hasn't finished yet, retry:
+ if (!HasHandshaken())
+ {
+ Handshake();
+ }
+
+ // If the handshake succeeded, write all the queued plaintext data:
+ if (HasHandshaken())
+ {
+ WritePlain(m_CleartextData.data(), m_CleartextData.size());
+ m_CleartextData.clear();
+ }
+}
+
+
+
+
+
+void cLuaTCPLink::cLinkSslContext::Send(const AString & a_Data)
+{
+ // If the handshake hasn't completed yet, queue the data:
+ if (!HasHandshaken())
+ {
+ m_CleartextData.append(a_Data);
+ TryFinishHandshaking();
+ return;
+ }
+
+ // The connection is all set up, write the cleartext data into the SSL context:
+ WritePlain(a_Data.data(), a_Data.size());
+ FlushBuffers();
+}
+
+
+
+
+
+int cLuaTCPLink::cLinkSslContext::ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes)
+{
+ // If there's nothing queued in the buffer, report empty buffer:
+ if (m_EncryptedData.empty())
+ {
+ return POLARSSL_ERR_NET_WANT_READ;
+ }
+
+ // Copy as much data as possible to the provided buffer:
+ size_t BytesToCopy = std::min(a_NumBytes, m_EncryptedData.size());
+ memcpy(a_Buffer, m_EncryptedData.data(), BytesToCopy);
+ m_EncryptedData.erase(0, BytesToCopy);
+ return static_cast<int>(BytesToCopy);
+}
+
+
+
+
+
+int cLuaTCPLink::cLinkSslContext::SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes)
+{
+ m_Link.m_Link->Send(a_Buffer, a_NumBytes);
+ return static_cast<int>(a_NumBytes);
+}
+
+
+
+
diff --git a/src/Bindings/LuaTCPLink.h b/src/Bindings/LuaTCPLink.h
index f2af911ec..9536c052b 100644
--- a/src/Bindings/LuaTCPLink.h
+++ b/src/Bindings/LuaTCPLink.h
@@ -11,6 +11,7 @@
#include "../OSSupport/Network.h"
#include "PluginLua.h"
+#include "../PolarSSL++/SslContext.h"
@@ -62,7 +63,53 @@ public:
Sends the RST packet, queued outgoing and incoming data is lost. */
void Close(void);
+ /** Starts a TLS handshake as a client connection.
+ If a client certificate should be used for the connection, set the certificate into a_OwnCertData and
+ its corresponding private key to a_OwnPrivKeyData. If both are empty, no client cert is presented.
+ a_OwnPrivKeyPassword is the password to be used for decoding PrivKey, empty if not passworded.
+ Returns empty string on success, non-empty error description on failure. */
+ AString StartTLSClient(
+ const AString & a_OwnCertData,
+ const AString & a_OwnPrivKeyData,
+ const AString & a_OwnPrivKeyPassword
+ );
+
protected:
+ /** Wrapper around cSslContext that is used when this link is being encrypted by SSL. */
+ class cLinkSslContext :
+ public cSslContext
+ {
+ cLuaTCPLink & m_Link;
+
+ /** Buffer for storing the incoming encrypted data until it is requested by the SSL decryptor. */
+ AString m_EncryptedData;
+
+ /** Buffer for storing the outgoing cleartext data until the link has finished handshaking. */
+ AString m_CleartextData;
+
+ public:
+ cLinkSslContext(cLuaTCPLink & a_Link);
+
+ /** Stores the specified block of data into the buffer of the data to be decrypted (incoming from remote).
+ Also flushes the SSL buffers by attempting to read any data through the SSL context. */
+ void StoreReceivedData(const char * a_Data, size_t a_NumBytes);
+
+ /** Tries to read any cleartext data available through the SSL, reports it in the link. */
+ void FlushBuffers(void);
+
+ /** Tries to finish handshaking the SSL. */
+ void TryFinishHandshaking(void);
+
+ /** Sends the specified cleartext data over the SSL to the remote peer.
+ If the handshake hasn't been completed yet, queues the data for sending when it completes. */
+ void Send(const AString & a_Data);
+
+ // cSslContext overrides:
+ virtual int ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes) override;
+ virtual int SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes) override;
+ };
+
+
/** The plugin for which the link is created. */
cPluginLua & m_Plugin;
@@ -76,11 +123,19 @@ protected:
/** The server that is responsible for this link, if any. */
cLuaServerHandleWPtr m_Server;
+ /** The SSL context used for encryption, if this link uses SSL.
+ If valid, the link uses encryption through this context. */
+ UniquePtr<cLinkSslContext> m_SslContext;
+
/** Common code called when the link is considered as terminated.
Releases m_Link, m_Callbacks and this from m_Server, each when applicable. */
void Terminated(void);
+ /** Called by the SSL context when there's incoming data available in the cleartext.
+ Reports the data via the Lua callback function. */
+ void ReceivedCleartextData(const char * a_Data, size_t a_NumBytes);
+
// cNetwork::cConnectCallbacks overrides:
virtual void OnConnected(cTCPLink & a_Link) override;
virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override;
diff --git a/src/Bindings/ManualBindings_Network.cpp b/src/Bindings/ManualBindings_Network.cpp
index 902f687c8..ff0f3568c 100644
--- a/src/Bindings/ManualBindings_Network.cpp
+++ b/src/Bindings/ManualBindings_Network.cpp
@@ -389,6 +389,51 @@ static int tolua_cTCPLink_GetRemotePort(lua_State * L)
+/** Binds cLuaTCPLink::StartTLSClient */
+static int tolua_cTCPLink_StartTLSClient(lua_State * L)
+{
+ // Function signature:
+ // LinkInstance:StartTLSClient(OwnCert, OwnPrivKey, OwnPrivKeyPassword) -> [true] or [nil, ErrMsg]
+
+ cLuaState S(L);
+ if (
+ !S.CheckParamUserType(1, "cTCPLink") ||
+ !S.CheckParamString(2, 4) ||
+ !S.CheckParamEnd(5)
+ )
+ {
+ return 0;
+ }
+
+ // Get the link:
+ cLuaTCPLink * Link;
+ if (lua_isnil(L, 1))
+ {
+ LOGWARNING("cTCPLink:StartTLSClient(): invalid link object. Stack trace:");
+ S.LogStackTrace();
+ return 0;
+ }
+ Link = *static_cast<cLuaTCPLink **>(lua_touserdata(L, 1));
+
+ // Read the params:
+ AString OwnCert, OwnPrivKey, OwnPrivKeyPassword;
+ S.GetStackValues(2, OwnCert, OwnPrivKey, OwnPrivKeyPassword);
+
+ // Start the TLS handshake:
+ AString res = Link->StartTLSClient(OwnCert, OwnPrivKey, OwnPrivKeyPassword);
+ if (!res.empty())
+ {
+ S.PushNil();
+ S.Push(Printf("Cannot start TLS on link to %s:%d: %s", Link->GetRemoteIP().c_str(), Link->GetRemotePort(), res.c_str()));
+ return 2;
+ }
+ return 1;
+}
+
+
+
+
+
////////////////////////////////////////////////////////////////////////////////
// cServerHandle bindings (routed through cLuaServerHandle):
@@ -495,11 +540,12 @@ void ManualBindings::BindNetwork(lua_State * tolua_S)
tolua_endmodule(tolua_S);
tolua_beginmodule(tolua_S, "cTCPLink");
- tolua_function(tolua_S, "Send", tolua_cTCPLink_Send);
- tolua_function(tolua_S, "GetLocalIP", tolua_cTCPLink_GetLocalIP);
- tolua_function(tolua_S, "GetLocalPort", tolua_cTCPLink_GetLocalPort);
- tolua_function(tolua_S, "GetRemoteIP", tolua_cTCPLink_GetRemoteIP);
- tolua_function(tolua_S, "GetRemotePort", tolua_cTCPLink_GetRemotePort);
+ tolua_function(tolua_S, "Send", tolua_cTCPLink_Send);
+ tolua_function(tolua_S, "GetLocalIP", tolua_cTCPLink_GetLocalIP);
+ tolua_function(tolua_S, "GetLocalPort", tolua_cTCPLink_GetLocalPort);
+ tolua_function(tolua_S, "GetRemoteIP", tolua_cTCPLink_GetRemoteIP);
+ tolua_function(tolua_S, "GetRemotePort", tolua_cTCPLink_GetRemotePort);
+ tolua_function(tolua_S, "StartTLSClient", tolua_cTCPLink_StartTLSClient);
tolua_endmodule(tolua_S);
tolua_beginmodule(tolua_S, "cServerHandle");
diff --git a/src/Globals.h b/src/Globals.h
index 29eaac871..7c2ab38d8 100644
--- a/src/Globals.h
+++ b/src/Globals.h
@@ -379,9 +379,10 @@ void inline LOG(const char * a_Format, ...)
#define assert_test(x) ( !!(x) || (assert(!#x), exit(1), 0))
#endif
-// Unified shared ptr from before C++11. Also no silly undercores.
+// Unified ptr types from before C++11. Also no silly undercores.
#define SharedPtr std::shared_ptr
#define WeakPtr std::weak_ptr
+#define UniquePtr std::unique_ptr
diff --git a/src/HTTPServer/SslHTTPConnection.cpp b/src/HTTPServer/SslHTTPConnection.cpp
index f09daac8f..f8dea0731 100644
--- a/src/HTTPServer/SslHTTPConnection.cpp
+++ b/src/HTTPServer/SslHTTPConnection.cpp
@@ -25,6 +25,15 @@ cSslHTTPConnection::cSslHTTPConnection(cHTTPServer & a_HTTPServer, const cX509Ce
+cSslHTTPConnection::~cSslHTTPConnection()
+{
+ m_Ssl.NotifyClose();
+}
+
+
+
+
+
void cSslHTTPConnection::OnReceivedData(const char * a_Data, size_t a_Size)
{
// Process the received data:
diff --git a/src/HTTPServer/SslHTTPConnection.h b/src/HTTPServer/SslHTTPConnection.h
index dc54b1eff..c461a3a24 100644
--- a/src/HTTPServer/SslHTTPConnection.h
+++ b/src/HTTPServer/SslHTTPConnection.h
@@ -25,6 +25,8 @@ public:
/** Creates a new connection on the specified server.
Sends the specified cert as the server certificate, uses the private key for decryption. */
cSslHTTPConnection(cHTTPServer & a_HTTPServer, const cX509CertPtr & a_Cert, const cCryptoKeyPtr & a_PrivateKey);
+
+ ~cSslHTTPConnection();
protected:
cBufferedSslContext m_Ssl;
diff --git a/src/PolarSSL++/CryptoKey.cpp b/src/PolarSSL++/CryptoKey.cpp
index 7c4f021b3..9354ddf50 100644
--- a/src/PolarSSL++/CryptoKey.cpp
+++ b/src/PolarSSL++/CryptoKey.cpp
@@ -45,7 +45,7 @@ cCryptoKey::cCryptoKey(const AString & a_PrivateKeyData, const AString & a_Passw
if (res != 0)
{
LOGWARNING("Failed to parse private key: -0x%x", res);
- ASSERT(!"Cannot parse PubKey");
+ ASSERT(!"Cannot parse PrivKey");
return;
}
}