Agent: Remove known_hosts from SSH Credential Collector

It is not used anywhere.

monkey/infection_monkey/credential_collectors/ssh_collector/SSH_credentials_collector.py

@@ -35,7 +35,7 @@ class SSHCollector(ICredentialCollector):
                 credentials_obj.identities.append(Username(info["name"]))
 
             ssh_keypair = {}
-            for key in ["public_key", "private_key", "known_hosts"]:
+            for key in ["public_key", "private_key"]:
                 if key in info and info.get(key) is not None:
                     ssh_keypair[key] = info[key]
 

monkey/infection_monkey/credential_collectors/ssh_collector/ssh_handler.py

@@ -31,12 +31,10 @@ def _get_home_dirs() -> Iterable[Dict]:
 def _get_ssh_struct(name: str, home_dir: str) -> Dict:
     """
     Construct the SSH info. It consisted of: name, home_dir,
-    public_key, private_key and known_hosts.
+    public_key and private_key.
 
     public_key: contents of *.pub file (public key)
     private_key: contents of * file (private key)
-    known_hosts: contents of known_hosts file(all the servers keys are good for,
-    possibly hashed)
 
     :param name: username of user, for whom the keys belong
     :param home_dir: users home directory
@@ -49,7 +47,6 @@ def _get_ssh_struct(name: str, home_dir: str) -> Dict:
         "home_dir": home_dir,
         "public_key": None,
         "private_key": None,
-        "known_hosts": None,
     }
 
 
@@ -88,15 +85,6 @@ def _get_ssh_files(usr_info: Iterable[Dict]) -> Iterable[Dict]:
                                             continue
                                 except (IOError, OSError):
                                     pass
-                            # By default, known hosts file is called 'known_hosts'
-                            known_hosts = os.path.join(current_path, "known_hosts")
-                            if os.path.exists(known_hosts):
-                                try:
-                                    with open(known_hosts) as f:
-                                        info["known_hosts"] = f.read()
-                                        logger.info("Found known_hosts in %s" % known_hosts)
-                                except (IOError, OSError):
-                                    pass
                             # If private key found don't search more
                             if info["private_key"]:
                                 break
@@ -104,9 +92,5 @@ def _get_ssh_files(usr_info: Iterable[Dict]) -> Iterable[Dict]:
                             pass
                 except OSError:
                     pass
-    usr_info = [
-        info
-        for info in usr_info
-        if info["private_key"] or info["known_hosts"] or info["public_key"]
-    ]
+    usr_info = [info for info in usr_info if info["private_key"] or info["public_key"]]
     return usr_info

monkey/tests/unit_tests/infection_monkey/credential_collectors/linux_credentials_collector/test_ssh_credentials_collector.py

@@ -14,9 +14,7 @@ def test_ssh_credentials_empty_results(monkeypatch):
     collected = SSHCollector().collect_credentials()
     assert [] == collected
 
-    ssh_creds = [
-        {"name": "", "home_dir": "", "public_key": None, "private_key": None, "known_hosts": None}
-    ]
+    ssh_creds = [{"name": "", "home_dir": "", "public_key": None, "private_key": None}]
     patch_ssh_handler(ssh_creds, monkeypatch)
     expected = []
     collected = SSHCollector().collect_credentials()
@@ -31,45 +29,33 @@ def test_ssh_info_result_parsing(monkeypatch):
             "home_dir": "/home/ubuntu",
             "public_key": "SomePublicKeyUbuntu",
             "private_key": "ExtremelyGoodPrivateKey",
-            "known_hosts": "MuchKnownHosts",
         },
         {
             "name": "mcus",
             "home_dir": "/home/mcus",
             "public_key": "AnotherPublicKey",
-            "private_key": "NotSoGoodPrivateKey",
-            "known_hosts": None,
-        },
-        {
-            "name": "",
-            "home_dir": "/",
-            "public_key": None,
             "private_key": None,
-            "known_hosts": "VeryGoodHosts1",
         },
+        {"name": "guest", "home_dir": "/", "public_key": None, "private_key": None},
     ]
     patch_ssh_handler(ssh_creds, monkeypatch)
 
     # Expected credentials
     username = Username("ubuntu")
     username2 = Username("mcus")
+    username3 = Username("guest")
 
     ssh_keypair1 = SSHKeypair(
-        {
-            "public_key": "SomePublicKeyUbuntu",
-            "private_key": "ExtremelyGoodPrivateKey",
-            "known_hosts": "MuchKnownHosts",
-        }
+        {"public_key": "SomePublicKeyUbuntu", "private_key": "ExtremelyGoodPrivateKey"}
     )
     ssh_keypair2 = SSHKeypair(
         {"public_key": "AnotherPublicKey", "private_key": "NotSoGoodPrivateKey"}
     )
-    ssh_keypair3 = SSHKeypair({"known_hosts": "VeryGoodHosts"})
 
     expected = [
         Credentials(identities=[username], secrets=[ssh_keypair1]),
         Credentials(identities=[username2], secrets=[ssh_keypair2]),
-        Credentials(identities=[], secrets=[ssh_keypair3]),
+        Credentials(identities=[username3], secrets=[]),
     ]
     collected = SSHCollector().collect_credentials()
     assert expected == collected