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IocpHttpsProxyServer.cpp
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#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <assert.h>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <memory>
#include <openssl/applink.c>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <string>
#include <thread>
#include <vector>
#include <winsock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "libssl.lib")
#pragma comment(lib, "libcrypto.lib")
#include "Util.h"
#include "SslUtil.h"
#include "spdlog/spdlog.h"
#include "spdlog/sinks/basic_file_sink.h"
// to set the default logger file
// *create an empty text file and add the path in basic_logger_mt() function*
void replace_default_logger_example()
{
auto new_logger = spdlog::basic_logger_mt("new_default_logger", "C:\\Users\\user\\OneDrive\\Desktop\\output_logs.txt", true);
spdlog::set_default_logger(new_logger);
spdlog::flush_every(std::chrono::seconds(3));
}
using namespace std;
#pragma warning(disable : 4996)
#define SERVICE_NAME TEXT("Example Service")
SERVICE_STATUS ServiceStatus = {0};
SERVICE_STATUS_HANDLE hServiceStatusHandle = NULL;
HANDLE hServiceEvent = NULL;
#define BUFFER_SIZE 4096
#define PORT 8080
HANDLE ProxyCompletionPort;
X509 *caCert;
EVP_PKEY *caKey;
SOCKET proxySocket;
BOOL verbose = TRUE;
static INT ID = 0;
typedef enum _IO_OPERATION
{
CLIENT_ACCEPT,
HTTP_S_RECV,
HTTP_S_SEND,
HTTP_C_RECV,
HTTP_C_SEND,
CLIENT_IO,
SERVER_IO,
IO,
SSL_SERVER_IO,
SSL_CLIENT_IO,
} IO_OPERATION,
*PERIO_OPERATIONS;
enum MODE
{
CLIENT,
SERVER,
};
// struct to store IOCP data
typedef struct _PER_IO_DATA
{
WSAOVERLAPPED overlapped;
DWORD key = ++ID;
SOCKET clientSocket, serverSocket;
WSABUF wsaClientSendBuf, wsaClientRecvBuf, wsaServerSendBuf, wsaServerRecvBuf;
char cSendBuffer[BUFFER_SIZE], cRecvBuffer[BUFFER_SIZE], sSendBuffer[BUFFER_SIZE], sRecvBuffer[BUFFER_SIZE];
DWORD bytesSend, bytesRecv;
IO_OPERATION ioOperation;
SSL *clientSSL, *targetSSL;
X509 *clientCert, *targetCert;
SSL_CTX *clientCTX;
string hostname;
EVP_PKEY *pkey;
BIO *srBio, *swBio, *crBio, *cwBio;
BOOL bioCFlag = FALSE, bioSFlag = FALSE;
BOOL clientRecvFlag = FALSE, serverRecvFlag = FALSE;
BOOL clientSendFlag = FALSE, serverSendFlag = FALSE;
} PER_IO_DATA, *LPPER_IO_DATA;
LPPER_IO_DATA UpdateIoCompletionPort(SOCKET socket, SOCKET peerSocket, IO_OPERATION ioOperation);
static DWORD WINAPI WorkerThread(LPVOID lparameter);
VOID StartProxyServer(VOID);
VOID cleanupSSL(VOID);
VOID WINAPI ServiceMain(DWORD dwArgc, LPSTR *lpArgv); // service main function
VOID WINAPI ServiceControlHandler(DWORD dwControl); // service control handler
VOID ServiceReportStatus(
DWORD dwCurrentState,
DWORD dwWin32ExitCode,
DWORD dwWaitHint);
VOID ServiceInit(DWORD dwArgc, LPSTR *lpArgv);
VOID ServiceInstall(VOID);
VOID ServiceDelete(VOID);
VOID ServiceStart(VOID);
VOID ServiceStop(VOID);
int main(int argc, CHAR *argv[])
{
BOOL bStServiceCtrlDispatcher = FALSE;
if (lstrcmpiA(argv[1], "install") == 0)
{
ServiceInstall();
cout << "Installation success" << endl;
}
else if (lstrcmpiA(argv[1], "start") == 0)
{
ServiceStart();
cout << "start success" << endl;
}
else if (lstrcmpiA(argv[1], "stop") == 0)
{
ServiceStop();
cout << "stop success" << endl;
}
else if (lstrcmpiA(argv[1], "delete") == 0)
{
ServiceDelete();
cout << "delete success" << endl;
}
else
{
SERVICE_TABLE_ENTRY DispatchTable[] =
{
{(LPWSTR)SERVICE_NAME, (LPSERVICE_MAIN_FUNCTION)ServiceMain},
{NULL, NULL}};
bStServiceCtrlDispatcher = StartServiceCtrlDispatcher(DispatchTable);
if (FALSE == bStServiceCtrlDispatcher)
{
cout << "bStServiceCtrlDispatcher failed " << GetLastError() << endl;
}
else
{
cout << "bStServiceCtrlDispatcher success" << endl;
}
}
system("PAUSE");
return 0;
}
// main logic starts here -->
VOID StartProxyServer()
{
initializeWinsock();
initializeOpenSSL();
replace_default_logger_example();
// we need to create a rootCA certificate and install it in our local device. refer https://superuser.com/questions/126121/how-to-create-my-own-certificate-chain.
FILE *ca_cert_file = fopen("C:\\Users\\user\\OneDrive\\Desktop\\Certs\\rootCA.crt", "r");
if (!ca_cert_file)
{
spdlog::info("[-]Error opening CA certificate file");
exit(EXIT_FAILURE);
}
caCert = PEM_read_X509(ca_cert_file, NULL, NULL, NULL);
fclose(ca_cert_file);
if (!caCert)
{
spdlog::info("[-]Error reading CA certificate");
exit(EXIT_FAILURE);
}
// private key for CA
FILE *ca_pkey_file = fopen("C:\\Users\\user\\OneDrive\\Desktop\\Certs\\rootCA.key", "r");
if (!ca_pkey_file)
{
spdlog::info("[-]Error opening CA certificate file");
exit(EXIT_FAILURE);
}
caKey = PEM_read_PrivateKey(ca_pkey_file, NULL, NULL, NULL);
fclose(ca_pkey_file);
if (!caKey)
{
spdlog::info("[-]Error reading CA private key");
exit(EXIT_FAILURE);
}
ProxyCompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
if (!ProxyCompletionPort)
{
spdlog::info("[-]Cannot create ProxyCompletionPort");
WSACleanup();
return;
}
SYSTEM_INFO systemInfo;
GetSystemInfo(&systemInfo);
for (DWORD i = 0; i < systemInfo.dwNumberOfProcessors; i++)
{
HANDLE pThread = CreateThread(NULL, 0, WorkerThread, ProxyCompletionPort, 0, NULL);
if (pThread == NULL)
{
spdlog::info("[-]Failed to create worker thread");
WSACleanup();
return;
}
CloseHandle(pThread);
}
proxySocket = createSocket(PORT);
while (TRUE)
{
SOCKET clientSocket = WSAAccept(proxySocket, NULL, NULL, NULL, 0);
if (clientSocket == INVALID_SOCKET)
{
spdlog::info("[-]WSAAccept failed - {}", WSAGetLastError());
continue;
}
else if (verbose)
{
spdlog::info("[+]client accepted");
}
struct sockaddr_in peer_addr;
socklen_t peer_addr_len = sizeof(peer_addr);
if (getpeername(clientSocket, (struct sockaddr *)&peer_addr, &peer_addr_len) == -1)
{
spdlog::info("[-]getpeername failed");
}
else
{
char peer_ip[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &peer_addr.sin_addr, peer_ip, INET_ADDRSTRLEN);
spdlog::info("[+]Connected client's Port: {}", ntohs(peer_addr.sin_port));
}
LPPER_IO_DATA clientData = UpdateIoCompletionPort(clientSocket, INVALID_SOCKET, CLIENT_ACCEPT);
if (!clientData)
{
spdlog::info("[-]UpdateIoCompletionPort failed");
closesocket(clientSocket);
continue;
}
else
{
spdlog::info("[+]UpdateIoCompletionPort done");
}
DWORD flags = 0;
if (WSARecv(clientData->clientSocket, &clientData->wsaClientRecvBuf, 1, &clientData->bytesRecv, &flags, &clientData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSARecv() pending");
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv failed - {}", error);
closesocket(clientData->clientSocket);
delete clientData;
continue;
}
}
else
{
spdlog::info("[+]From client - {} bytes.", clientData->bytesRecv);
cout << clientData->cRecvBuffer << endl;
clientData->bytesRecv = 0;
}
}
closesocket(proxySocket);
cleanupSSL();
WSACleanup();
return;
}
// initialize the IOCP struct with server and client sockets
LPPER_IO_DATA UpdateIoCompletionPort(SOCKET socket, SOCKET peerSocket, IO_OPERATION ioOperation)
{
LPPER_IO_DATA ioData = new PER_IO_DATA;
memset(&ioData->overlapped, '\0', sizeof(WSAOVERLAPPED));
ioData->clientSocket = socket;
ioData->serverSocket = peerSocket;
ioData->bytesRecv = 0;
ioData->bytesSend = 0;
ioData->ioOperation = ioOperation;
memset(ioData->cRecvBuffer, '\0', BUFFER_SIZE);
memset(ioData->sRecvBuffer, '\0', BUFFER_SIZE);
memset(ioData->cSendBuffer, '\0', BUFFER_SIZE);
memset(ioData->sSendBuffer, '\0', BUFFER_SIZE);
ioData->wsaClientRecvBuf.buf = ioData->cRecvBuffer;
ioData->wsaClientRecvBuf.len = sizeof(ioData->cRecvBuffer);
ioData->wsaClientSendBuf.buf = ioData->cSendBuffer;
ioData->wsaClientSendBuf.len = sizeof(ioData->cSendBuffer);
ioData->wsaServerRecvBuf.buf = ioData->sRecvBuffer;
ioData->wsaServerRecvBuf.len = sizeof(ioData->sRecvBuffer);
ioData->wsaServerSendBuf.buf = ioData->sSendBuffer;
ioData->wsaServerSendBuf.len = sizeof(ioData->sSendBuffer);
ioData->targetSSL = NULL;
ioData->clientSSL = NULL;
ioData->clientCert = NULL;
ioData->targetCert = NULL;
ioData->clientCTX = NULL;
ioData->pkey = NULL;
ioData->crBio = NULL;
ioData->cwBio = NULL;
ioData->srBio = NULL;
ioData->swBio = NULL;
if (CreateIoCompletionPort((HANDLE)socket, ProxyCompletionPort, (ULONG_PTR)ioData, 0) == NULL)
{
delete ioData;
return NULL;
}
return ioData;
}
// adding SNI functionality to retrieve the host name from client hello
int ServerNameCallback(SSL *ssl, int *ad, LPPER_IO_DATA ioData)
{
const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (servername)
{
if (verbose)
{
spdlog::info("[=]SNI: {}", servername);
}
ioData->hostname = servername;
// Generate key for new certificate
ioData->pkey = EVP_PKEY_new();
RSA *rsa = RSA_generate_key(2048, RSA_F4, NULL, NULL);
EVP_PKEY_assign_RSA(ioData->pkey, rsa);
// Generate new certificate
ioData->clientCert = create_certificate(caCert, caKey, ioData->pkey, ioData->targetCert, ioData->hostname);
// Assign new certificate and private key to SSL context
SSL_use_certificate(ssl, ioData->clientCert);
SSL_use_PrivateKey(ssl, ioData->pkey);
}
else
{
spdlog::info("[-]No SNI");
}
return SSL_TLSEXT_ERR_OK;
}
static DWORD WINAPI WorkerThread(LPVOID workerThreadContext)
{
HANDLE completionPort = (HANDLE)workerThreadContext;
LPPER_IO_DATA socketData = NULL;
LPWSAOVERLAPPED overlapped = NULL;
DWORD flags = 0;
DWORD bytesTransferred = 0;
while (TRUE)
{
BOOL result = GetQueuedCompletionStatus(completionPort,
&bytesTransferred,
(PDWORD_PTR)&socketData,
(LPOVERLAPPED *)&overlapped,
INFINITE);
LPPER_IO_DATA ioData = (LPPER_IO_DATA)overlapped;
if (!result)
{
spdlog::info("[-]GetQueuedCompletionStatus failed - {}", GetLastError());
}
if (ioData == NULL)
{
spdlog::info("[-]IO_DATA NULL");
cout << "[-]IO_DATA NULL" << endl;
return 0;
}
if (!result || bytesTransferred == 0)
{
spdlog::info("[-]Connection closed. ID - {}", ioData->key);
if (ioData)
{
closesocket(ioData->clientSocket);
ioData->serverSocket = INVALID_SOCKET;
delete ioData;
}
return 0;
}
switch (ioData->ioOperation)
{
/*
Client accept ->
for HTTP connections - simple send-recv cycles.
for HTTPS connections - parse request and create new SSL object for connections
*/
case CLIENT_ACCEPT:
{
ioData->bytesRecv = bytesTransferred;
int port = 0;
string request(ioData->cRecvBuffer, ioData->bytesRecv);
if (strncmp(ioData->cRecvBuffer, "CONNECT", 7) == 0)
{
ioData->ioOperation = SSL_SERVER_IO;
string hostname;
if (!parseConnectRequest(request, hostname, port))
{
spdlog::info("[-]Invalid CONNECT request");
closesocket(ioData->clientSocket);
delete ioData;
break;
}
if (!hostname.empty())
{
ioData->hostname = hostname;
ioData->serverSocket = connectToTarget(hostname, port);
spdlog::info("[+]Connected to server - {}, on port - {}. ID - {}", hostname, port, ioData->key);
if (ioData->serverSocket != INVALID_SOCKET)
{
if (CreateIoCompletionPort((HANDLE)ioData->serverSocket, ProxyCompletionPort, NULL, 0) == NULL)
{
spdlog::info("[-]CreateIoCompletionPort for server failed");
closesocket(ioData->serverSocket);
ioData->serverSocket = INVALID_SOCKET;
closesocket(ioData->clientSocket);
ioData->clientSocket = INVALID_SOCKET;
delete ioData;
break;
}
else if (verbose)
{
spdlog::info("[+]Updated Io completion port. ID - {}", ioData->key);
}
}
// using BIO memory buffers to transfer data between sockets
ioData->crBio = BIO_new(BIO_s_mem());
ioData->cwBio = BIO_new(BIO_s_mem());
ioData->srBio = BIO_new(BIO_s_mem());
ioData->swBio = BIO_new(BIO_s_mem());
if (!ioData->crBio || !ioData->cwBio || !ioData->srBio || !ioData->swBio)
{
spdlog::info("[-]BIO_new failed. ID - ", ioData->key);
break;
}
else
{
// set the memory BIOs to non-blocking mode
BIO_set_nbio(ioData->crBio, 1);
BIO_set_nbio(ioData->cwBio, 1);
BIO_set_nbio(ioData->srBio, 1);
BIO_set_nbio(ioData->swBio, 1);
}
SSL_CTX *targetCTX = SSL_CTX_new(TLS_client_method());
ioData->targetSSL = SSL_new(targetCTX);
if (!SSL_set_tlsext_host_name(ioData->targetSSL, ioData->hostname.c_str()))
{
spdlog::info("[-]SSL_set_tlsext_host_name() failed. ID - {}", ioData->key);
ERR_print_errors_fp(stderr);
break;
}
// to act as CLIENT
SSL_set_connect_state(ioData->targetSSL);
SSL_CTX_set_verify(targetCTX, SSL_VERIFY_NONE, NULL); // no verifications required
SSL_set_bio(ioData->targetSSL, ioData->srBio, ioData->swBio);
char response[] = "HTTP/1.1 200 Connection Established\r\n\r\n";
memcpy(ioData->wsaClientSendBuf.buf, response, sizeof(response));
ioData->wsaClientSendBuf.len = sizeof(response);
if (WSASend(ioData->clientSocket, &ioData->wsaClientSendBuf, 1, &ioData->bytesSend, 0, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend() failed. ID - {}", ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]Failed to send response - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]Connection established with client. ID - {}", ioData->key);
}
}
}
else
{
ioData->hostname = extractHost(request);
if (sizeof(ioData->hostname) > 0)
{
ioData->ioOperation = HTTP_S_RECV;
ioData->serverSocket = connectToTarget(ioData->hostname, 80);
if (ioData->serverSocket != INVALID_SOCKET)
{
if (CreateIoCompletionPort((HANDLE)ioData->serverSocket, ProxyCompletionPort, NULL, 0) == NULL)
{
spdlog::info("[-]CreateIoCompletionPort for server failed. ID - {}", ioData->key);
closesocket(ioData->serverSocket);
closesocket(ioData->clientSocket);
delete ioData;
break;
}
else if (verbose)
{
spdlog::info("[+]Updated Io completion port. ID - {}", ioData->key);
}
}
memcpy(ioData->sSendBuffer, ioData->cRecvBuffer, bytesTransferred);
ioData->wsaServerSendBuf.len = bytesTransferred;
if (WSASend(ioData->serverSocket, &ioData->wsaServerSendBuf, 1, &ioData->bytesSend, 0, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend() IO pending. ID - {}", ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]Failed to send response - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSASend() server - {} bytes. ID - {}", ioData->bytesSend, ioData->key);
}
}
}
break;
}
case HTTP_S_RECV:
{
ioData->ioOperation = HTTP_C_SEND;
if (WSARecv(ioData->serverSocket, &ioData->wsaServerRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSARecv() HTTP_S_RECV - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]Failed to send response - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
continue;
}
}
else
{
spdlog::info("[+]WSARecv() HTTP_S_RECV - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
}
break;
}
case HTTP_C_SEND:
{
ioData->ioOperation = CLIENT_ACCEPT;
memcpy(ioData->cSendBuffer, ioData->sRecvBuffer, bytesTransferred);
ioData->wsaClientSendBuf.len = bytesTransferred;
if (WSASend(ioData->clientSocket, &ioData->wsaClientSendBuf, 1, &ioData->bytesSend, 0, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend() IO pending. ID - {}", ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]Failed to send response - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
continue;
}
}
else
{
spdlog::info("[+]WSASend() HTTP_C_SEND - {} bytes. ID - {}", ioData->bytesSend, ioData->key);
}
break;
}
case HTTP_C_RECV:
{
ioData->ioOperation = CLIENT_ACCEPT;
if (WSARecv(ioData->clientSocket, &ioData->wsaClientRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend() IO pending. ID - {}", ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]Failed to send response - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
continue;
}
}
else
{
spdlog::info("[+]WSARecv() HTTP_C_RECV - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
}
break;
}
case SSL_SERVER_IO:
{
if (strlen(ioData->sRecvBuffer) > 0)
{
int bio_write = BIO_write(ioData->srBio, ioData->sRecvBuffer, bytesTransferred);
if (bio_write > 0)
{
spdlog::info("[+]BIO_write() server - {} bytes. ID - {}", bio_write, ioData->key);
}
memset(ioData->sRecvBuffer, '\0', BUFFER_SIZE);
}
// SSL handshake with server
if (!SSL_is_init_finished(ioData->targetSSL))
{
char Buf[BUFFER_SIZE] = {};
int bio_read = 0, ret_server, status;
ret_server = SSL_do_handshake(ioData->targetSSL);
if (ret_server == 1)
{
// SSL handshake with client
ioData->ioOperation = SSL_CLIENT_IO;
// Extract certificate of Server
ioData->targetCert = SSL_get_peer_certificate(ioData->targetSSL);
if (!ioData->targetCert)
{
spdlog::info("[-]Cert of server not extracted. ID - {}", ioData->key);
SSL_shutdown(ioData->targetSSL);
SSL_free(ioData->targetSSL);
}
ioData->clientCTX = SSL_CTX_new(TLS_server_method());
SSL_CTX_set_tlsext_servername_callback(ioData->clientCTX, ServerNameCallback);
SSL_CTX_set_tlsext_servername_arg(ioData->clientCTX, ioData);
SSL_CTX_set_info_callback(ioData->clientCTX, myInfoCallback);
SSL_CTX_set_keylog_callback(ioData->clientCTX, SSL_CTX_keylog_callback_func);
if (!ioData->clientCTX)
{
spdlog::info("[-]Failed to create client SSL CTX. ID - {}", ioData->key);
}
ioData->clientSSL = SSL_new(ioData->clientCTX);
SSL_set_accept_state(ioData->clientSSL); // to act as SERVER
SSL_set_bio(ioData->clientSSL, ioData->crBio, ioData->cwBio);
if (!SSL_is_init_finished(ioData->clientSSL))
{
int ret_client = SSL_do_handshake(ioData->clientSSL);
if (WSARecv(ioData->clientSocket, &ioData->wsaClientRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
DWORD error = WSAGetLastError();
spdlog::info("[-]WSARecv() failed - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv() failed - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSARecv() client - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
}
}
break;
}
status = SSL_get_error(ioData->targetSSL, ret_server);
spdlog::info("[=]SSL_get_error() - {}. ID - {}", status, ioData->key);
if (status == SSL_ERROR_WANT_READ || status == SSL_ERROR_WANT_WRITE)
{
bio_read = BIO_read(ioData->swBio, Buf, BUFFER_SIZE);
if (bio_read > 0)
{
if (verbose)
{
spdlog::info("[+]BIO_read() server - {} bytes. ID - {}", bio_read, ioData->key);
}
memcpy(ioData->wsaServerSendBuf.buf, Buf, bio_read);
ioData->wsaServerSendBuf.len = bio_read;
if (WSASend(ioData->serverSocket, &ioData->wsaServerSendBuf, 1, &ioData->bytesSend, 0, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend error - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSASend error - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSASend() server - {} bytes. ID - {}", ioData->bytesSend, ioData->key);
}
}
else
{
ioData->bytesRecv = 0;
ioData->wsaServerRecvBuf.len = BUFFER_SIZE;
if (WSARecv(ioData->serverSocket, &ioData->wsaServerRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSARecv error - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv error - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSARecv() server - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
}
}
}
else if (status == SSL_ERROR_SSL)
{
spdlog::info("[-]SSL_get_error() - {}. ID - {}", ERR_error_string(ERR_get_error(), NULL), ioData->key);
break;
}
else
{
spdlog::info("[-]SSL_get_error() -{}. ID - {}", status, ioData->key);
break;
}
}
else if (verbose)
{
spdlog::info("[+]SSL handshake with server done. ID - {}", ioData->key);
}
break;
}
case SSL_CLIENT_IO:
{
if (strlen(ioData->cRecvBuffer) > 0)
{
// ioData->clientRecvFlag = FALSE;
int bio_write = BIO_write(ioData->crBio, ioData->cRecvBuffer, bytesTransferred);
if (bio_write > 0 && verbose)
{
spdlog::info("[+]BIO_write() client - {} bytes. ID - {}", bio_write, ioData->key);
}
else
{
spdlog::info("[-]BIO_write() client. ID - {}", ioData->key);
}
memset(ioData->cRecvBuffer, '\0', BUFFER_SIZE);
}
// SSL handshake with client
if (!SSL_is_init_finished(ioData->clientSSL))
{
char Buf[BUFFER_SIZE] = {};
int bio_read = 0, ret_client, status;
ret_client = SSL_do_handshake(ioData->clientSSL);
if (ret_client == 1)
{
ioData->ioOperation = IO;
ioData->clientRecvFlag = TRUE;
memset(ioData->cRecvBuffer, '\0', BUFFER_SIZE);
if (WSARecv(ioData->clientSocket, &ioData->wsaClientRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
if (WSAGetLastError() != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv() failed. ID - {}", ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSARecv() client - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
}
break;
}
status = SSL_get_error(ioData->clientSSL, ret_client);
spdlog::info("[=]SSL_get_error() - {}. ID - {}", status, ioData->key);
if (status == SSL_ERROR_WANT_READ || status == SSL_ERROR_WANT_WRITE)
{
bio_read = BIO_read(ioData->cwBio, Buf, BUFFER_SIZE);
if (bio_read > 0)
{
if (verbose)
{
spdlog::info("[+]BIO_read() client - {} bytes. ID - {}", bio_read, ioData->key);
}
memcpy(ioData->wsaClientSendBuf.buf, Buf, bio_read);
ioData->wsaClientSendBuf.len = bio_read;
if (WSASend(ioData->clientSocket, &ioData->wsaClientSendBuf, 1, &ioData->bytesSend, 0, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSASend() error - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSASend() error - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSASend() client - {} bytes. ID - {}", ioData->bytesSend, ioData->key);
}
}
else
{
ioData->bytesRecv = 0;
ioData->clientRecvFlag = TRUE;
ioData->wsaClientRecvBuf.len = BUFFER_SIZE;
if (WSARecv(ioData->clientSocket, &ioData->wsaClientRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSARecv() error - {}. ID - {}", error, ioData->key);
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv() error - {}. ID - {}", error, ioData->key);
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSARecv() client - {} bytes. ID - {}", ioData->key);
}
}
}
else if (status == SSL_ERROR_SSL)
{
spdlog::info("[-]SSL_get_error() - {}. ID - {}", ERR_error_string(ERR_get_error(), NULL), ioData->key);
break;
}
else
{
spdlog::info("[-]SSL_get_error() - {}. ID - {}", status, ioData->key);
break;
}
}
else
{
spdlog::info("[+]SSL handshake with client done. ID - {}", ioData->key);
}
break;
}
case IO:
{
int bioRead = 0, bioWrite = 0, sslRead = 0, sslWrite = 0, ret, error;
if (strlen(ioData->cRecvBuffer) > 0 && !ioData->bioCFlag)
{
cout << "[+]Bytestransferred client - " << bytesTransferred << " ID - " << ioData->key << endl;
bioWrite = BIO_write(ioData->crBio, ioData->cRecvBuffer, bytesTransferred);
if (bioWrite > 0)
{
ioData->clientRecvFlag = FALSE;
// spdlog::info("[+]BIO_write() client - {} bytes. ID - {}\n{}", bioWrite, ioData->key, toHex(ioData->cRecvBuffer, bioWrite));
memset(ioData->cRecvBuffer, '\0', BUFFER_SIZE);
sslRead = SSL_read(ioData->clientSSL, ioData->cRecvBuffer, BUFFER_SIZE);
if (sslRead <= 0)
{
error = SSL_get_error(ioData->clientSSL, sslRead);
spdlog::info("[-]SSL_read error - {}. ID - {}", error, ioData->key);
cout << "[=]SSL_read error - " << error << " ID - " << ioData->key << endl;
if (error == SSL_ERROR_WANT_READ || error == SSL_ERROR_WANT_WRITE)
{
ioData->bytesRecv = 0;
ioData->clientRecvFlag = TRUE;
memset(ioData->cRecvBuffer, '\0', BUFFER_SIZE);
if (WSARecv(ioData->clientSocket, &ioData->wsaClientRecvBuf, 1, &ioData->bytesRecv, &flags, &ioData->overlapped, NULL) == SOCKET_ERROR)
{
int error = WSAGetLastError();
spdlog::info("[-]WSARecv() client IO pending. ID - {}", ioData->key);
cout << "[-]WSARecv() client IO - " << error << " ID - " << ioData->key << endl;
if (error != WSA_IO_PENDING)
{
spdlog::info("[-]WSARecv() client IO - {}. ID - {}", error, ioData->key);
cerr << "[-]WSARecv() client IO - " << error << " ID - " << ioData->key << endl;
closesocket(ioData->clientSocket);
closesocket(ioData->serverSocket);
SSL_free(ioData->clientSSL);
SSL_free(ioData->targetSSL);
SSL_CTX_free(ioData->clientCTX);
delete ioData;
break;
}
}
else
{
spdlog::info("[+]WSARecv() client IO - {} bytes. ID - {}", ioData->bytesRecv, ioData->key);
cout << "[+]WSARecv() client IO - " << ioData->bytesRecv << " bytes. ID - " << ioData->key << endl;
}
break;
}