implement ssh key support

app/functions/netmiko.py

@@ -0,0 +1,77 @@
+import logging, os
+from netmiko import ConnectHandler, NetmikoTimeoutException, NetmikoAuthenticationException
+
+logger = logging.getLogger(__name__)
+
+# Establish connection to network device
+def establish_connection(device_config):
+    try:
+        return ConnectHandler(**device_config)
+    except Exception as e:
+        logger.error(f"Failed to establish connection to {device_config['host']}: {e}")
+        raise
+
+
+# Execute command on network device
+def execute_command(device, command_format, target, ip_version):
+    device_config = {
+        'device_type': device['type'],
+        'host': device['host'],
+        'port': device['port'],
+        'username': device['username'],
+        'timeout': 10,
+        'session_timeout': 60,
+        'conn_timeout': 10,
+        'auth_timeout': 10,
+    }
+
+    # Use SSH key if provided
+    if "ssh_key" in device:
+        key_path = os.path.join("/instance/ssh-keys", device['ssh_key'])
+
+        if not os.path.exists(key_path):
+            logger.error(f"SSH file not found: {key_path} for {device['host']}")
+            return {'error': True, 'message': 'Authentication failed'}
+        
+        device_config['use_keys'] = True
+        device_config['key_file'] =  os.path.join("/instance/ssh-keys", device['ssh_key'])
+
+    else:
+        device_config['password'] = device['password']
+
+    command_timeout = 30
+
+    try:
+        with establish_connection(device_config) as connection:
+            # Format the command
+            command = str(command_format.format(ip_version=ip_version, target=target).strip())
+
+            # Execute the command
+            output = connection.send_command(
+                command,
+                read_timeout=command_timeout,
+                strip_command=True,
+                strip_prompt=True,
+                max_loops=int(command_timeout * 10)
+            )
+
+            # Clean output
+            output = output.strip() if output else ""
+
+            if not output:
+                logger.error(f"No response from {device['host']}")
+                return {'error': True, 'message': 'No response from device'}
+
+            return {'error': False, 'message': output}
+
+    except NetmikoTimeoutException as e:
+        logger.error(f"Timeout error on {device['host']}: {e}")
+        return {'error': True, 'message': 'Timeout error'}
+    
+    except NetmikoAuthenticationException as e:
+        logger.error(f"Authentication failed for {device['host']}: {e}")
+        return {'error': True, 'message': 'Authentication failed'}
+    
+    except Exception as e:
+        logger.error(f"An unexpected error occurred on {device['host']}: {e}")
+        return {'error': True, 'message': 'Unexpected error'}

app/functions/utils.py

@@ -1,6 +1,5 @@
 import os, yaml, logging, requests
 from functools import wraps
-from netmiko import ConnectHandler, NetmikoTimeoutException, NetmikoAuthenticationException
 from flask import request
 
 logger = logging.getLogger(__name__)
@@ -71,64 +70,3 @@ def get_client_ip():
     if not request.headers.getlist("X-Forwarded-For"):
         return request.remote_addr
     return request.headers.getlist("X-Forwarded-For")[0]
-
-
-# Establish connection to network device
-def establish_connection(device_config):
-    try:
-        return ConnectHandler(**device_config)
-    except Exception as e:
-        logger.error(f"Failed to establish connection to {device_config['host']}: {e}")
-        raise
-
-
-# Execute command on network device
-def execute_command(device, command_format, target, ip_version):
-    device_config = {
-        'device_type': device['type'],
-        'host': device['host'],
-        'port': device['port'],
-        'username': device['username'],
-        'password': device['password'],
-        'timeout': 10,
-        'session_timeout': 60,
-        'conn_timeout': 10,
-        'auth_timeout': 10,
-    }
-
-    command_timeout = 30
-
-    try:
-        with establish_connection(device_config) as connection:
-            # Format the command
-            command = str(command_format.format(ip_version=ip_version, target=target).strip())
-
-            # Execute the command
-            output = connection.send_command(
-                command,
-                read_timeout=command_timeout,
-                strip_command=True,
-                strip_prompt=True,
-                max_loops=int(command_timeout * 10)
-            )
-
-            # Clean output
-            output = output.strip() if output else ""
-
-            if not output:
-                logger.error(f"No response from {device['host']}")
-                return {'error': True, 'message': 'No response from device'}
-
-            return {'error': False, 'message': output}
-
-    except NetmikoTimeoutException as e:
-        logger.error(f"Timeout error on {device['host']}: {e}")
-        return {'error': True, 'message': 'Timeout error'}
-    
-    except NetmikoAuthenticationException as e:
-        logger.error(f"Authentication failed for {device['host']}: {e}")
-        return {'error': True, 'message': 'Authentication failed'}
-    
-    except Exception as e:
-        logger.error(f"An unexpected error occurred on {device['host']}: {e}")
-        return {'error': True, 'message': 'Unexpected error'}

app/views/main.py

@@ -2,7 +2,8 @@ import logging
 
 from flask import Blueprint, request, render_template
 
-from app.functions.utils import exception_handler, load_yaml, send_webhook, get_client_ip, execute_command
+from app.functions.utils import exception_handler, load_yaml, send_webhook, get_client_ip
+from app.functions.netmiko import execute_command
 
 logger = logging.getLogger(__name__)