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Allow to generate the challenges from more than 2 wordlist entries.

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Change-Id: I94a84e703a4072eb083177158690de190bee53fa
This commit is contained in:
Platonides 2012-07-28 01:54:17 +02:00 committed by Gerrit Code Review
parent 008c232ca6
commit 8cfde58450
1 changed files with 11 additions and 7 deletions
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18
captcha.py
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@ -124,10 +124,13 @@ def gen_subdir(basedir, md5hash, levels):
os.mkdir(fulldir)
return subdir
def try_pick_word(words, blacklist, verbose, min_length, max_length):
word1 = words[random.randint(0,len(words)-1)]
word2 = words[random.randint(0,len(words)-1)]
word = word1+word2
def try_pick_word(words, blacklist, verbose, nwords, min_length, max_length):
word = words[random.randint(0,len(words)-1)]
while nwords > 1:
word2 = words[random.randint(0,len(words)-1)]
word = word+word2
nwords = nwords - 1
if verbose:
print "word is %s" % word
@ -153,9 +156,9 @@ def try_pick_word(words, blacklist, verbose, min_length, max_length):
return None
return word
def pick_word(words, blacklist, verbose, min_length, max_length):
def pick_word(words, blacklist, verbose, nwords, min_length, max_length):
for x in range(1000): # If we can't find a valid combination in 1000 tries, just give up
word = try_pick_word(words, blacklist, verbose, min_length, max_length)
word = try_pick_word(words, blacklist, verbose, nwords, min_length, max_length)
if word:
return word
sys.exit("Unable to find valid word combinations")
@ -182,6 +185,7 @@ if __name__ == '__main__':
parser.add_option("--fill", help="Fill the output directory to contain N files, overrides count, cannot be used with --dirs", metavar="N", type='int')
parser.add_option("--dirs", help="Put the images into subdirectories N levels deep - $wgCaptchaDirectoryLevels", metavar="N", type='int')
parser.add_option("--verbose", "-v", help="Show debugging information", action='store_true')
parser.add_option("--number-words", help="Number of words from the wordlist which make a captcha challenge (default 2)", type='int', default=2)
parser.add_option("--min-length", help="Minimum length for a captcha challenge", type='int', default=1)
parser.add_option("--max-length", help="Maximum length for a captcha challenge", type='int', default=-1)
@ -225,7 +229,7 @@ if __name__ == '__main__':
blacklist = []
for i in range(count):
word = pick_word(words, blacklist, verbose, opts.min_length, opts.max_length)
word = pick_word(words, blacklist, verbose, opts.number_words, opts.min_length, opts.max_length)
salt = "%08x" % random.randrange(2**32)
# 64 bits of hash is plenty for this purpose
md5hash = hashlib.md5(key+salt+word+key+salt).hexdigest()[:16]