Add support of manual aut_methods for SSH2 connection

Exscript/protocols/protocol.py

@@ -224,7 +224,8 @@ def __init__(self,
                  verify_fingerprint=True,
                  account_factory=None,
                  banner_timeout=20,
-                 encoding='latin-1'):
+                 encoding='latin-1',
+                 auth_methods=[]):
         """
         Constructor.
         The following events are provided:
@@ -252,6 +253,9 @@ def __init__(self,
         :keyword banner_timeout: The time to wait for the banner.
         :type encoding: str
         :keyword encoding: The encoding of data received from the remote host.
+        :type auth_methods: list
+        :keyword auth_methods: The SSH authentication method to process (default to all supported
+            by the remote device)
         """
         self.data_received_event = Event()
         self.otp_requested_event = Event()
@@ -282,6 +286,8 @@ def __init__(self,
         self.banner_timeout = banner_timeout
         self.encoding = encoding
         self.send_data = None
+        self.auth_methods = auth_methods
+
         if stdout is None:
             self.stdout = StringIO()
         else:
@@ -611,6 +617,24 @@ def get_timeout(self):
         """
         return self.timeout
 
+    def set_auth_methods(self, methods):
+        """
+        Defines the SSH2 list of authentication methods allowed
+
+        :type  methods: list
+        :param methods: A list of authentication methods (check Exscript.protocols.ssh2.auth_type)
+        """
+        self.auth_methods = methods
+
+    def get_auth_methods(self):
+        """
+        Returns the current SSH2 authentication methods allowed.
+
+        :rtype:  list
+        :return: A list of authentication SSH2 methods allowed.
+        """
+        return self.auth_methods
+
     def _connect_hook(self, host, port):
         """
         Should be overwritten.

Exscript/protocols/ssh2.py

@@ -269,6 +269,8 @@ def _paramiko_auth_autokey(self, username, password):
 
     def _get_auth_methods(self, allowed_types):
         auth_methods = []
+        if self.auth_methods:
+            allowed_types = self.auth_methods
         for method in allowed_types:
             for type_name in auth_types[method]:
                 auth_methods.append(getattr(self, type_name))

tests/Exscript/protocols/ProtocolTest.py

@@ -171,6 +171,20 @@ def testSetDriver(self):
     def testGetDriver(self):
         pass  # Already tested in testSetDriver()
 
+    def testSetAuthMethods(self):
+        self.assertListEqual(self.protocol.get_auth_methods(), [])
+
+        self.protocol.set_auth_methods([])
+        self.assertTrue(self.protocol.get_auth_methods() is not None)
+        self.assertListEqual(self.protocol.get_auth_methods(), [])
+
+        self.protocol.set_auth_methods(['password', 'publickey'])
+        self.assertTrue(self.protocol.get_auth_methods() is not None)
+        self.assertListEqual(self.protocol.get_auth_methods(), ['password', 'publickey'])
+
+    def testGetAuthMethods(self):
+        pass
+
     def testGetBanner(self):
         self.assertEqual(self.protocol.get_banner(), None)
         if self.protocol.__class__ == Protocol: