1 | import os |
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2 | from string import atoi |
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3 | import md5 |
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4 | from random import randint |
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5 | from Products.qPloneCaptchas.data import basic_english |
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6 | from Products.qPloneCaptchas.config import havePIL, CAPTCHAS_COUNT |
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7 | from DateTime import DateTime |
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8 | import re |
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9 | try: |
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10 | import Crypto.Cipher.DES as Crypto |
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11 | except: |
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12 | import Crypto |
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13 | |
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14 | def encrypt1(s): |
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15 | return md5.new(s).hexdigest().upper() |
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16 | |
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17 | def gen_captcha(text, fnt_sz, fmt='JPEG'): |
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18 | """Generate a captcha image""" |
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19 | import ImageFile |
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20 | import Image |
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21 | import ImageFont |
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22 | import ImageDraw |
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23 | import ImageFilter |
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24 | from PIL import ImageFile as pyImageFile |
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25 | import sys |
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26 | sys.modules['ImageFile'] = pyImageFile |
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27 | from cStringIO import StringIO |
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28 | outFile = StringIO() |
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29 | |
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30 | DATA_PATH = os.path.abspath(os.path.dirname(__file__)) + '/data' |
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31 | FONT_PATH = DATA_PATH + '/fonts' |
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32 | |
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33 | # randomly select the foreground color |
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34 | fgcolor = randint(0x000000,0x000fff) |
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35 | # make the background color the opposite of fgcolor |
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36 | bgcolor = fgcolor ^ 0xffffff |
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37 | # create a font object |
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38 | import sys |
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39 | font = ImageFont.truetype(FONT_PATH+'/vera/Vera.ttf', fnt_sz) |
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40 | # determine dimensions of the text |
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41 | dim = font.getsize(text) |
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42 | # create a new image slightly larger that the text |
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43 | im = Image.new('RGB', (dim[0]+5,dim[1]+5), bgcolor) |
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44 | d = ImageDraw.Draw(im) |
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45 | x, y = im.size |
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46 | r = randint |
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47 | # draw 100 random colored boxes on the background |
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48 | |
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49 | for num in range(50): |
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50 | d.rectangle((r(0,x),r(0,y),r(0,x),r(0,y)),fill=r(0xfff000,0xffffff)) |
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51 | |
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52 | # add the text to the image |
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53 | d.text((3,3), text, font=font, fill=fgcolor) |
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54 | |
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55 | for num in range(10): |
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56 | d.line([(r(0,x), r(0,y)), (r(0,x), r(0,y))], fill=r(0xf0f000, 0xffffff)) |
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57 | |
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58 | im = im.filter(ImageFilter.EDGE_ENHANCE_MORE) |
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59 | |
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60 | # save the image to a file |
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61 | im.save(outFile, format=fmt) |
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62 | outFile.seek(0) |
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63 | src = outFile.read() |
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64 | size = len(src) |
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65 | sys.modules['ImageFile'] = ImageFile |
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66 | return {'src':src, 'size':size} |
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67 | |
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68 | |
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69 | def getWord(index): |
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70 | words = basic_english.words.split() |
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71 | return words[index] |
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72 | |
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73 | def getIndex(word): |
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74 | words = basic_english.words.split() |
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75 | try: |
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76 | res = words.index(word) |
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77 | except ValueError: |
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78 | res = getLen()+1 |
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79 | return res |
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80 | |
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81 | def getCaptchasCount(havePIL): |
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82 | def getLen(): |
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83 | return len(basic_english.words.split()) |
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84 | return havePIL and getLen() or CAPTCHAS_COUNT |
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85 | |
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86 | def formKey(num): |
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87 | def normalize(s): |
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88 | return (not len(s)%8 and s) or normalize(s+str(randint(0, 9))) |
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89 | |
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90 | return normalize('%s_%i_'%(str(DateTime().timeTime()), num)) |
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91 | |
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92 | def encrypt(key, s): |
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93 | return toHex(Crypto.new(key).encrypt(s)) |
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94 | |
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95 | def decrypt(key, s): |
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96 | return Crypto.new(key).decrypt(toStr(s)) |
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97 | |
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98 | def parseKey(s): |
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99 | ps = re.match('^(.+?)_(.+?)_', s) |
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100 | return {'date': ps.group(1), 'key':ps.group(2)} |
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101 | |
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102 | def addExpiredKey(context, key): |
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103 | context.portal_captchas.new(key) |
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104 | |
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105 | def toHex(s): |
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106 | lst = [] |
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107 | for ch in s: |
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108 | hv = hex(ord(ch)).replace('0x', '') |
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109 | if len(hv) == 1: |
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110 | hv = '0'+hv |
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111 | lst.append(hv) |
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112 | |
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113 | return reduce(lambda x,y:x+y, lst) |
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114 | |
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115 | def toStr(s): |
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116 | return s and chr(atoi(s[:2], base=16)) + toStr(s[2:]) or '' |
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