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Recognize LANcom LCOS software and support ed448 key extraction (#277)

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* Include raw hostkey bytes in debug output

* Recognize LANcom LCOS software and support extraction of ssh-ed448 key type

LANcom router devices appear to be primarily used in Germany (see [1]
for examples on the public Internet), and they appear to support the
`ssh-ed448` key type which is documented in [2], but which has never
been supported by any as-yet-released version of OpenSSH.

[1] https://www.shodan.io/search?query=ssh+%22ed448%22
[2] https://datatracker.ietf.org/doc/html/rfc8709#name-public-key-format
This commit is contained in:
Daniel Lenski
2024-07-06 17:56:24 -07:00
committed by GitHub
parent 92db5f0138
commit bbbdf71e50
3 changed files with 11 additions and 0 deletions
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src/ssh_audit/kexdh.py
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@@ -134,6 +134,9 @@ class KexDH: # pragma: nocover
if self.__hostkey_type == 'ssh-ed25519':
self.out.d("%s has a fixed host key modulus of 32." % self.__hostkey_type)
self.__hostkey_n_len = 32
elif self.__hostkey_type == 'ssh-ed448':
self.out.d("%s has a fixed host key modulus of 57." % self.__hostkey_type)
self.__hostkey_n_len = 57
else:
# Here is the modulus size & actual modulus of the host key public key.
hostkey_n, self.__hostkey_n_len, ptr = KexDH.__get_bytes(hostkey, ptr)