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Date: Tue, 07 Sep 2010 13:06:35 -0400
From: Brad Tilley <brad@...ystems.com>
To: john-users@...ts.openwall.com
Subject: bug in netscreen.py I sent earlier
I wasn't checking for Python < 2.6 correctly. Still rough, but seems to
work OK on Python 2 or 3:
----------------
# netscreen.py
# Generate passwords in netscreen format.
import sys
def net(user, password):
b64 =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
middle = "Administration Tools"
s = "%s:%s:%s" % (user, middle, password)
# For versions of Python 2.5 and older
if sys.version_info[0] == 2 and sys.version_info[1] < 6:
import md5
m = md5.new(s).digest()
else:
import hashlib
m = hashlib.md5(s.encode('latin_1')).digest()
narray = []
for i in range(8):
if sys.version_info[0] == 2:
n1 = ord(m[2*i])
n2 = ord(m[2*i+1])
narray.append( (n1<<8 & 0xff00) | (n2 & 0xff) )
if sys.version_info[0] == 3:
n1 = ord(chr(m[2*i]))
n2 = ord(chr(m[2*i+1]))
narray.append( (n1<<8 & 0xff00) | (n2 & 0xff) )
res = ""
for i in narray:
p1 = i >> 12 & 0xf
p2 = i >> 6 & 0x3f
p3 = i & 0x3f
res = res + b64[p1] + b64[p2] + b64[p3]
for c, n in zip("nrcstn", [0, 6, 12, 17, 23, 29]):
res = res[:n] + c + res[n:]
return res
if __name__ == '__main__':
user = sys.argv[1]
password = sys.argv[2]
ciphertext = net(user,password)
print(("%s:%s$%s" % (user,user,ciphertext)))
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