/usr/lib/python2.7/dist-packages/captcha/helpers.py is in python-django-captcha 0.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | # -*- coding: utf-8 -*-
import random
from captcha.conf import settings
from django.core.urlresolvers import reverse
from six import u, text_type
def math_challenge():
operators = ('+', '*', '-',)
operands = (random.randint(1, 10), random.randint(1, 10))
operator = random.choice(operators)
if operands[0] < operands[1] and '-' == operator:
operands = (operands[1], operands[0])
challenge = '%d%s%d' % (operands[0], operator, operands[1])
return '%s=' % (challenge), text_type(eval(challenge))
def random_char_challenge():
chars, ret = u('abcdefghijklmnopqrstuvwxyz'), u('')
for i in range(settings.CAPTCHA_LENGTH):
ret += random.choice(chars)
return ret.upper(), ret
def unicode_challenge():
chars, ret = u('äàáëéèïíîöóòüúù'), u('')
for i in range(settings.CAPTCHA_LENGTH):
ret += random.choice(chars)
return ret.upper(), ret
def word_challenge():
fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb')
l = fd.readlines()
fd.close()
while True:
word = random.choice(l).strip()
if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH:
break
return word.upper(), word.lower()
def huge_words_and_punctuation_challenge():
"Yay, undocumneted. Mostly used to test Issue 39 - http://code.google.com/p/django-simple-captcha/issues/detail?id=39"
fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb')
l = fd.readlines()
fd.close()
word = ''
while True:
word1 = random.choice(l).strip()
word2 = random.choice(l).strip()
punct = random.choice(settings.CAPTCHA_PUNCTUATION)
word = '%s%s%s' % (word1, punct, word2)
if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH:
break
return word.upper(), word.lower()
def noise_arcs(draw, image):
size = image.size
draw.arc([-20, -20, size[0], 20], 0, 295, fill=settings.CAPTCHA_FOREGROUND_COLOR)
draw.line([-20, 20, size[0] + 20, size[1] - 20], fill=settings.CAPTCHA_FOREGROUND_COLOR)
draw.line([-20, 0, size[0] + 20, size[1]], fill=settings.CAPTCHA_FOREGROUND_COLOR)
return draw
def noise_dots(draw, image):
size = image.size
for p in range(int(size[0] * size[1] * 0.1)):
draw.point((random.randint(0, size[0]), random.randint(0, size[1])), fill=settings.CAPTCHA_FOREGROUND_COLOR)
return draw
def noise_null(draw, image):
return draw
def post_smooth(image):
try:
import ImageFilter
except ImportError:
from PIL import ImageFilter
return image.filter(ImageFilter.SMOOTH)
def captcha_image_url(key):
""" Return url to image. Need for ajax refresh and, etc"""
return reverse('captcha-image', args=[key])
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