Improved --config handling and user accounts from the command line

If all of the necessary options are passed as command line flags, you may no longer even need a config file. in this case, don't complain that a config file wasn't provided.  As part of this, allow the user to set the user account(s) using the -u flag.

SSH/config.ini.TEMPLATE

@@ -6,6 +6,10 @@
 # The name of the file you wish to write the honeypot log to.
 log_file = ssh_log.log 
 
+# The name of the sensor, used to identify this honeypot in the logs.
+# If you leave this blank, the honeypot will use the system's hostname.
+sensor_name = deceive
+
 # Settings for the SSH honeypot
 [ssh]
 # The port the SSH honeypot will listen on. You will probably want to set 
@@ -14,8 +18,10 @@ port = 8022
 # The host key to use for the SSH server. This should be a private key.
 # See the README for how to generate this key.
 host_priv_key = ssh_host_key
-# The server version string to send to clients.
+# The server version string to send to clients. The SSH server automatically 
-server_version_string = SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
+# prepends "SSH-2.0-" to this. So "OpenSSH_8.2p1 Ubuntu-4ubuntu0.3" will 
+# be transformed to "SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3".
+server_version_string = OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
 
 # Settings to configure which LLM backend to use.  Only one stanza 
 # should be uncommented at a time.
@@ -24,6 +30,10 @@ server_version_string = SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
 llm_provider = openai
 model_name = gpt-4o
 
+##### ollama llama3
+#llm_provider = ollama
+#model_name = llama3.3
+
 ##### Any model via Amazon Bedrock
 # Valid AWS model names can be found here: https://docs.aws.amazon.com/bedrock/latest/userguide/model-ids.html
 #llm_provider = AWS

SSH/ssh_server.py

@@ -18,14 +18,20 @@ from operator import itemgetter
 from langchain_openai import ChatOpenAI
 from langchain_aws import ChatBedrock, ChatBedrockConverse
 from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_ollama import ChatOllama 
 from langchain_core.messages import HumanMessage, SystemMessage, trim_messages
 from langchain_core.chat_history import BaseChatMessageHistory, InMemoryChatMessageHistory
 from langchain_core.runnables.history import RunnableWithMessageHistory
 from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain_core.runnables import RunnablePassthrough
 from asyncssh.misc import ConnectionLost
+import socket
 
 class JSONFormatter(logging.Formatter):
+    def __init__(self, sensor_name, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.sensor_name = sensor_name
+
     def format(self, record):
         log_record = {
             "timestamp": datetime.datetime.fromtimestamp(record.created, datetime.timezone.utc).isoformat(sep="T", timespec="milliseconds"),
@@ -35,7 +41,9 @@ class JSONFormatter(logging.Formatter):
             "src_port": record.src_port,
             "dst_ip": record.dst_ip,
             "dst_port": record.dst_port,
-            "message": record.getMessage()
+            "message": record.getMessage(),
+            "sensor_name": self.sensor_name,
+            "sensor_protocol": "ssh"
         }
         if hasattr(record, 'interactive'):
             log_record["interactive"] = record.interactive
@@ -168,6 +176,7 @@ representative examples.
         judgement = "MALICIOUS"
 
     logger.info("Session summary", extra={"details": llm_response.content, "judgement": judgement})
+
     server.summary_generated = True
 
 async def handle_client(process: asyncssh.SSHServerProcess, server: MySSHServer) -> None:
@@ -269,7 +278,7 @@ class ContextFilter(logging.Filter):
         if task:
             task_name = task.get_name()
         else:
-            task_name = "-"
+            task_name = thread_local.__dict__.get('session_id', '-')
 
         record.src_ip = thread_local.__dict__.get('src_ip', '-')
         record.src_port = thread_local.__dict__.get('src_port', '-')   
@@ -277,7 +286,7 @@ class ContextFilter(logging.Filter):
         record.dst_port = thread_local.__dict__.get('dst_port', '-')
 
         record.task_name = task_name
-
+        
         return True
 
 def llm_get_session_history(session_id: str) -> BaseChatMessageHistory:
@@ -296,15 +305,19 @@ def get_user_accounts() -> dict:
 
     return accounts
 
-def choose_llm():
+def choose_llm(llm_provider: Optional[str] = None, model_name: Optional[str] = None):
-    llm_provider_name = config['llm'].get("llm_provider", "openai")
+    llm_provider_name = llm_provider or config['llm'].get("llm_provider", "openai")
     llm_provider_name = llm_provider_name.lower()
-    model_name = config['llm'].get("model_name", "gpt-3.5-turbo")
+    model_name = model_name or config['llm'].get("model_name", "gpt-3.5-turbo")
 
     if llm_provider_name == 'openai':
         llm_model = ChatOpenAI(
             model=model_name
         )
+    elif llm_provider_name == 'ollama':
+            llm_model = ChatOllama(
+            model=model_name
+        )
     elif llm_provider_name == 'aws':
         llm_model = ChatBedrockConverse(
             model=model_name,
@@ -347,25 +360,79 @@ def get_prompts(prompt: Optional[str], prompt_file: Optional[str]) -> dict:
 try:
     # Parse command line arguments
     parser = argparse.ArgumentParser(description='Start the SSH honeypot server.')
-    parser.add_argument('-c', '--config', type=str, default='config.ini', help='Path to the configuration file')
+    parser.add_argument('-c', '--config', type=str, default=None, help='Path to the configuration file')
     parser.add_argument('-p', '--prompt', type=str, help='The entire text of the prompt')
     parser.add_argument('-f', '--prompt-file', type=str, default='prompt.txt', help='Path to the prompt file')
+    parser.add_argument('-l', '--llm-provider', type=str, help='The LLM provider to use')
+    parser.add_argument('-m', '--model-name', type=str, help='The model name to use')
+    parser.add_argument('-t', '--trimmer-max-tokens', type=int, help='The maximum number of tokens to send to the LLM backend in a single request')
+    parser.add_argument('-s', '--system-prompt', type=str, help='System prompt for the LLM')
+    parser.add_argument('-P', '--port', type=int, help='The port the SSH honeypot will listen on')
+    parser.add_argument('-k', '--host-priv-key', type=str, help='The host key to use for the SSH server')
+    parser.add_argument('-v', '--server-version-string', type=str, help='The server version string to send to clients')
+    parser.add_argument('-L', '--log-file', type=str, help='The name of the file you wish to write the honeypot log to')
+    parser.add_argument('-S', '--sensor-name', type=str, help='The name of the sensor, used to identify this honeypot in the logs')
+    parser.add_argument('-u', '--user-account', action='append', help='User account in the form username=password. Can be repeated.')
     args = parser.parse_args()
 
-    # Check if the config file exists
+    # Determine which config file to load
-    if not os.path.exists(args.config):
+    config = ConfigParser()
-        print(f"Error: The specified config file '{args.config}' does not exist.", file=sys.stderr)
+    if args.config is not None:
-        sys.exit(1)
+        # User explicitly set a config file; error if it doesn't exist.
+        if not os.path.exists(args.config):
+            print(f"Error: The specified config file '{args.config}' does not exist.", file=sys.stderr)
+            sys.exit(1)
+        config.read(args.config)
+    else:
+        default_config = "config.ini"
+        if os.path.exists(default_config):
+            config.read(default_config)
+        else:
+            # Use defaults when no config file found.
+            config['honeypot'] = {'log_file': 'ssh_log.log', 'sensor_name': socket.gethostname()}
+            config['ssh'] = {'port': '8022', 'host_priv_key': 'ssh_host_key', 'server_version_string': 'SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3'}
+            config['llm'] = {'llm_provider': 'openai', 'model_name': 'gpt-3.5-turbo', 'trimmer_max_tokens': '64000', 'system_prompt': ''}
+            config['user_accounts'] = {}
+
+    # Override config values with command line arguments if provided
+    if args.llm_provider:
+        config['llm']['llm_provider'] = args.llm_provider
+    if args.model_name:
+        config['llm']['model_name'] = args.model_name
+    if args.trimmer_max_tokens:
+        config['llm']['trimmer_max_tokens'] = str(args.trimmer_max_tokens)
+    if args.system_prompt:
+        config['llm']['system_prompt'] = args.system_prompt
+    if args.port:
+        config['ssh']['port'] = str(args.port)
+    if args.host_priv_key:
+        config['ssh']['host_priv_key'] = args.host_priv_key
+    if args.server_version_string:
+        config['ssh']['server_version_string'] = args.server_version_string
+    if args.log_file:
+        config['honeypot']['log_file'] = args.log_file
+    if args.sensor_name:
+        config['honeypot']['sensor_name'] = args.sensor_name
+
+    # Merge command-line user accounts into the config
+    if args.user_account:
+        if 'user_accounts' not in config:
+            config['user_accounts'] = {}
+        for account in args.user_account:
+            if '=' in account:
+                key, value = account.split('=', 1)
+                config['user_accounts'][key.strip()] = value.strip()
+            else:
+                config['user_accounts'][account.strip()] = ''
+
+    # Read the user accounts from the configuration
+    accounts = get_user_accounts()
 
     # Always use UTC for logging
     logging.Formatter.formatTime = (lambda self, record, datefmt=None: datetime.datetime.fromtimestamp(record.created, datetime.timezone.utc).isoformat(sep="T",timespec="milliseconds"))
 
-    # Read our configuration file
+    # Get the sensor name from the config or use the system's hostname
-    config = ConfigParser()
+    sensor_name = config['honeypot'].get('sensor_name', socket.gethostname())
-    config.read(args.config)
-
-    # Read the user accounts from the configuration file
-    accounts = get_user_accounts()
 
     # Set up the honeypot logger
     logger = logging.getLogger(__name__)  
@@ -374,7 +441,7 @@ try:
     log_file_handler = logging.FileHandler(config['honeypot'].get("log_file", "ssh_log.log"))
     logger.addHandler(log_file_handler)
 
-    log_file_handler.setFormatter(JSONFormatter())
+    log_file_handler.setFormatter(JSONFormatter(sensor_name))
 
     f = ContextFilter()
     logger.addFilter(f)
@@ -385,7 +452,7 @@ try:
     llm_system_prompt = prompts["system_prompt"]
     llm_user_prompt = prompts["user_prompt"]
 
-    llm = choose_llm()
+    llm = choose_llm(config['llm'].get("llm_provider"), config['llm'].get("model_name"))
 
     llm_sessions = dict()
 

requirements.txt

@@ -7,7 +7,8 @@ langchain_community
 langchain_openai
 # For Google's Gemini models
 langchain_google_genai
-
+# For Ollama models
+langchain_ollama
 # For AWS
 langchain_aws
 transformers