1 files changed, 84 insertions, 0 deletions
diff --git a/src/ssh_audit/ssh1_kexdb.py b/src/ssh_audit/ssh1_kexdb.py
new file mode 100644
index 0000000..3a7de1b
--- /dev/null
+++ b/src/ssh_audit/ssh1_kexdb.py
@@ -0,0 +1,84 @@
+"""
+   The MIT License (MIT)
+
+   Copyright (C) 2017 Andris Raugulis (moo@arthepsy.eu)
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+"""
+# pylint: disable=unused-import
+import copy
+import threading
+
+from typing import Dict, List, Set, Sequence, Tuple, Iterable  # noqa: F401
+from typing import Callable, Optional, Union, Any  # noqa: F401
+
+
+class SSH1_KexDB:  # pylint: disable=too-few-public-methods
+
+    FAIL_PLAINTEXT = 'no encryption/integrity'
+    FAIL_OPENSSH37_REMOVE = 'removed since OpenSSH 3.7'
+    FAIL_NA_BROKEN = 'not implemented in OpenSSH, broken algorithm'
+    FAIL_NA_UNSAFE = 'not implemented in OpenSSH (server), unsafe algorithm'
+    TEXT_CIPHER_IDEA = 'cipher used by commercial SSH'
+
+    DB_PER_THREAD: Dict[int, Dict[str, Dict[str, List[List[Optional[str]]]]]] = {}
+
+    MASTER_DB: Dict[str, Dict[str, List[List[Optional[str]]]]] = {
+        'key': {
+            'ssh-rsa1': [['1.2.2']],
+        },
+        'enc': {
+            'none': [['1.2.2'], [FAIL_PLAINTEXT]],
+            'idea': [[None], [], [], [TEXT_CIPHER_IDEA]],
+            'des': [['2.3.0C'], [FAIL_NA_UNSAFE]],
+            '3des': [['1.2.2']],
+            'tss': [[''], [FAIL_NA_BROKEN]],
+            'rc4': [[], [FAIL_NA_BROKEN]],
+            'blowfish': [['1.2.2']],
+        },
+        'aut': {
+            'rhosts': [['1.2.2', '3.6'], [FAIL_OPENSSH37_REMOVE]],
+            'rsa': [['1.2.2']],
+            'password': [['1.2.2']],
+            'rhosts_rsa': [['1.2.2']],
+            'tis': [['1.2.2']],
+            'kerberos': [['1.2.2', '3.6'], [FAIL_OPENSSH37_REMOVE]],
+        }
+    }
+
+
+    @staticmethod
+    def get_db() -> Dict[str, Dict[str, List[List[Optional[str]]]]]:
+        '''Returns a copy of the MASTER_DB that is private to the calling thread.  This prevents multiple threads from polluting the results of other threads.'''
+        calling_thread_id = threading.get_ident()
+
+        if calling_thread_id not in SSH1_KexDB.DB_PER_THREAD:
+            SSH1_KexDB.DB_PER_THREAD[calling_thread_id] = copy.deepcopy(SSH1_KexDB.MASTER_DB)
+
+        return SSH1_KexDB.DB_PER_THREAD[calling_thread_id]
+
+
+    @staticmethod
+    def thread_exit() -> None:
+        '''Deletes the calling thread's copy of the MASTER_DB.  This is needed because, in rare circumstances, a terminated thread's ID can be re-used by new threads.'''
+
+        calling_thread_id = threading.get_ident()
+
+        if calling_thread_id in SSH1_KexDB.DB_PER_THREAD:
+            del SSH1_KexDB.DB_PER_THREAD[calling_thread_id]