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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SRC_TLS_WRAP_H_
#define SRC_TLS_WRAP_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "node.h"
#include "node_crypto.h" // SSLWrap
#include "async_wrap.h"
#include "env.h"
#include "stream_wrap.h"
#include "v8.h"
#include <openssl/ssl.h>
#include <string>
namespace node {
// Forward-declarations
class WriteWrap;
namespace crypto {
class SecureContext;
class NodeBIO;
}
class TLSWrap : public AsyncWrap,
public crypto::SSLWrap<TLSWrap>,
public StreamBase,
public StreamListener {
public:
~TLSWrap() override;
static void Initialize(v8::Local<v8::Object> target,
v8::Local<v8::Value> unused,
v8::Local<v8::Context> context,
void* priv);
// Implement StreamBase:
bool IsAlive() override;
bool IsClosing() override;
bool IsIPCPipe() override;
int GetFD() override;
ShutdownWrap* CreateShutdownWrap(
v8::Local<v8::Object> req_wrap_object) override;
AsyncWrap* GetAsyncWrap() override;
// Implement StreamResource:
int ReadStart() override; // Exposed to JS
int ReadStop() override; // Exposed to JS
int DoShutdown(ShutdownWrap* req_wrap) override;
int DoWrite(WriteWrap* w,
uv_buf_t* bufs,
size_t count,
uv_stream_t* send_handle) override;
// Return error_ string or nullptr if it's empty.
const char* Error() const override;
// Reset error_ string to empty. Not related to "clear text".
void ClearError() override;
// Called by the done() callback of the 'newSession' event.
void NewSessionDoneCb();
// Implement MemoryRetainer:
void MemoryInfo(MemoryTracker* tracker) const override;
SET_MEMORY_INFO_NAME(TLSWrap)
SET_SELF_SIZE(TLSWrap)
protected:
// Alternative to StreamListener::stream(), that returns a StreamBase instead
// of a StreamResource.
inline StreamBase* underlying_stream() {
return static_cast<StreamBase*>(stream_);
}
static const int kClearOutChunkSize = 16384;
// Maximum number of bytes for hello parser
static const int kMaxHelloLength = 16384;
// Usual ServerHello + Certificate size
static const int kInitialClientBufferLength = 4096;
// Maximum number of buffers passed to uv_write()
static const int kSimultaneousBufferCount = 10;
TLSWrap(Environment* env,
v8::Local<v8::Object> obj,
Kind kind,
StreamBase* stream,
crypto::SecureContext* sc);
static void SSLInfoCallback(const SSL* ssl_, int where, int ret);
void InitSSL();
// SSL has a "clear" text (unencrypted) side (to/from the node API) and
// encrypted ("enc") text side (to/from the underlying socket/stream).
// On each side data flows "in" or "out" of SSL context.
//
// EncIn() doesn't exist. Encrypted data is pushed from underlying stream into
// enc_in_ via the stream listener's OnStreamAlloc()/OnStreamRead() interface.
void EncOut(); // Write encrypted data from enc_out_ to underlying stream.
void ClearIn(); // SSL_write() clear data "in" to SSL.
void ClearOut(); // SSL_read() clear text "out" from SSL.
// Call Done() on outstanding WriteWrap request.
bool InvokeQueued(int status, const char* error_str = nullptr);
// Drive the SSL state machine by attempting to SSL_read() and SSL_write() to
// it. Transparent handshakes mean SSL_read() might trigger I/O on the
// underlying stream even if there is no clear text to read or write.
inline void Cycle() {
// Prevent recursion
if (++cycle_depth_ > 1)
return;
for (; cycle_depth_ > 0; cycle_depth_--) {
ClearIn();
ClearOut();
// EncIn() doesn't exist, it happens via stream listener callbacks.
EncOut();
}
}
// Implement StreamListener:
// Returns buf that points into enc_in_.
uv_buf_t OnStreamAlloc(size_t size) override;
void OnStreamRead(ssize_t nread, const uv_buf_t& buf) override;
void OnStreamAfterWrite(WriteWrap* w, int status) override;
v8::Local<v8::Value> GetSSLError(int status, int* err, std::string* msg);
static void OnClientHelloParseEnd(void* arg);
static void Wrap(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Receive(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Start(const v8::FunctionCallbackInfo<v8::Value>& args);
static void SetVerifyMode(const v8::FunctionCallbackInfo<v8::Value>& args);
static void EnableSessionCallbacks(
const v8::FunctionCallbackInfo<v8::Value>& args);
static void EnableCertCb(const v8::FunctionCallbackInfo<v8::Value>& args);
static void DestroySSL(const v8::FunctionCallbackInfo<v8::Value>& args);
static void GetServername(const v8::FunctionCallbackInfo<v8::Value>& args);
static void SetServername(const v8::FunctionCallbackInfo<v8::Value>& args);
static int SelectSNIContextCallback(SSL* s, int* ad, void* arg);
crypto::SecureContext* sc_;
// BIO buffers hold encrypted data.
BIO* enc_in_ = nullptr; // StreamListener fills this for SSL_read().
BIO* enc_out_ = nullptr; // SSL_write()/handshake fills this for EncOut().
// Waiting for ClearIn() to pass to SSL_write().
std::vector<uv_buf_t> pending_cleartext_input_;
size_t write_size_ = 0;
WriteWrap* current_write_ = nullptr;
WriteWrap* current_empty_write_ = nullptr;
bool write_callback_scheduled_ = false;
bool started_ = false;
bool established_ = false;
bool shutdown_ = false;
std::string error_;
int cycle_depth_ = 0;
// If true - delivered EOF to the js-land, either after `close_notify`, or
// after the `UV_EOF` on socket.
bool eof_ = false;
private:
static void GetWriteQueueSize(
const v8::FunctionCallbackInfo<v8::Value>& info);
};
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_TLS_WRAP_H_
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