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authorJeffWDH <jeffwdh@github.com>2023-10-21 14:29:05 -0400
committerJeffWDH <jeffwdh@github.com>2023-10-21 14:29:05 -0400
commit8cdf6eb47052445cde3b4f22e422afa9422a9a73 (patch)
tree9015b9842f47a5a02d99f0d245330591bac17e60 /src/op_mode/ssh.py
parent69fb230ee022100234af233f2a2823f887c95059 (diff)
downloadvyos-1x-8cdf6eb47052445cde3b4f22e422afa9422a9a73.tar.gz
vyos-1x-8cdf6eb47052445cde3b4f22e422afa9422a9a73.zip
T5661: Add show show ssh dynamic-protection attacker and show log ssh dynamic-protection
Diffstat (limited to 'src/op_mode/ssh.py')
-rwxr-xr-xsrc/op_mode/ssh.py100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/op_mode/ssh.py b/src/op_mode/ssh.py
new file mode 100755
index 000000000..c09b2166f
--- /dev/null
+++ b/src/op_mode/ssh.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+#
+# Copyright 2017-2023 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+import json
+import sys
+import glob
+import vyos.opmode
+from vyos.utils.process import cmd
+from vyos.configquery import ConfigTreeQuery
+from tabulate import tabulate
+
+def show_fingerprints(raw: bool, ascii: bool):
+ config = ConfigTreeQuery()
+ if not config.exists("service ssh"):
+ raise vyos.opmode.UnconfiguredSubsystem("SSH server is not enabled.")
+
+ publickeys = glob.glob("/etc/ssh/*.pub")
+
+ if publickeys:
+ keys = []
+ for keyfile in publickeys:
+ try:
+ if ascii:
+ keydata = cmd("ssh-keygen -l -v -E sha256 -f " + keyfile).splitlines()
+ else:
+ keydata = cmd("ssh-keygen -l -E sha256 -f " + keyfile).splitlines()
+ type = keydata[0].split(None)[-1].strip("()")
+ key_size = keydata[0].split(None)[0]
+ fingerprint = keydata[0].split(None)[1]
+ comment = keydata[0].split(None)[2:-1][0]
+ if ascii:
+ ascii_art = "\n".join(keydata[1:])
+ keys.append({"type": type, "key_size": key_size, "fingerprint": fingerprint, "comment": comment, "ascii_art": ascii_art})
+ else:
+ keys.append({"type": type, "key_size": key_size, "fingerprint": fingerprint, "comment": comment})
+ except:
+ # Ignore invalid public keys
+ pass
+ if raw:
+ return keys
+ else:
+ headers = {"type": "Type", "key_size": "Key Size", "fingerprint": "Fingerprint", "comment": "Comment", "ascii_art": "ASCII Art"}
+ output = "SSH server public key fingerprints:\n\n" + tabulate(keys, headers=headers, tablefmt="simple")
+ return output
+ else:
+ if raw:
+ return []
+ else:
+ return "No SSH server public keys are found."
+
+def show_dynamic_protection(raw: bool):
+ config = ConfigTreeQuery()
+ if not config.exists("service ssh dynamic-protection"):
+ raise vyos.opmode.UnconfiguredSubsystem("SSH server dynamic-protection is not enabled.")
+
+ attackers = []
+ try:
+ # IPv4
+ attackers = attackers + json.loads(cmd("sudo nft -j list set ip sshguard attackers"))["nftables"][1]["set"]["elem"]
+ except:
+ pass
+ try:
+ # IPv6
+ attackers = attackers + json.loads(cmd("sudo nft -j list set ip6 sshguard attackers"))["nftables"][1]["set"]["elem"]
+ except:
+ pass
+ if attackers:
+ if raw:
+ return attackers
+ else:
+ output = "Blocked attackers:\n" + "\n".join(attackers)
+ return output
+ else:
+ if raw:
+ return []
+ else:
+ return "No blocked attackers."
+
+if __name__ == '__main__':
+ try:
+ res = vyos.opmode.run(sys.modules[__name__])
+ if res:
+ print(res)
+ except (ValueError, vyos.opmode.Error) as e:
+ print(e)
+ sys.exit(1)