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Refactor timeframe and compatibility functions.

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This commit is contained in:
Andris Raugulis 2016-09-17 00:58:06 +03:00
parent 11ee9ecd05
commit adba0ea08a
1 changed files with 26 additions and 15 deletions
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41
ssh-audit.py
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@ -1000,7 +1000,7 @@ def get_ssh_version(version_desc):
return (SSH.Product.OpenSSH, version_desc)
def get_alg_timeframe(alg_desc, result={}):
def get_alg_timeframe(alg_desc, for_server=True, result={}):
versions = alg_desc[0]
vlen = len(versions)
for i in range(3):
@ -1015,6 +1015,12 @@ def get_alg_timeframe(alg_desc, result={}):
continue
for v in cversions.split(','):
ssh_prefix, ssh_version = get_ssh_version(v)
if not ssh_version:
continue
if ssh_version.endswith('C'):
if for_server:
continue
ssh_version = ssh_version[:-1]
if ssh_prefix not in result:
result[ssh_prefix] = [None, None, None]
prev, push = result[ssh_prefix][i], False
@ -1029,19 +1035,17 @@ def get_alg_timeframe(alg_desc, result={}):
return result
def get_ssh_timeframe(kex):
alg_timeframe = {}
algs = {'kex': kex.kex_algorithms,
'key': kex.key_algorithms,
'enc': kex.server.encryption,
'mac': kex.server.mac}
for alg_type, alg_list in algs.items():
for alg_name in alg_list:
alg_desc = KexDB.ALGORITHMS[alg_type].get(alg_name)
if alg_desc is None:
continue
alg_timeframe = get_alg_timeframe(alg_desc, alg_timeframe)
return alg_timeframe
def get_ssh_timeframe(alg_pairs, for_server=True):
timeframe = {}
for alg_pair in alg_pairs:
alg_db, algs = alg_pair
for alg_type, alg_list in algs.items():
for alg_name in alg_list:
alg_desc = alg_db[alg_type].get(alg_name)
if alg_desc is None:
continue
timeframe = get_alg_timeframe(alg_desc, for_server, timeframe)
return timeframe
def get_alg_since_text(alg_desc):
@ -1110,7 +1114,14 @@ def output_algorithm(alg_type, alg_name, alg_max_len=0):
def output_compatibility(kex, for_server=True):
ssh_timeframe = get_ssh_timeframe(kex)
alg_pairs = []
if kex is not None:
alg_pairs.append((KexDB.ALGORITHMS,
{'kex': kex.kex_algorithms,
'key': kex.key_algorithms,
'enc': kex.server.encryption,
'mac': kex.server.mac}))
ssh_timeframe = get_ssh_timeframe(alg_pairs, for_server)
vp = 1 if for_server else 2
comp_text = []
for sshd_name in [SSH.Product.OpenSSH, SSH.Product.DropbearSSH]: