[2058] | 1 | from DateTime import DateTime |
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| 2 | |
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| 3 | from zope.component import getMultiAdapter |
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| 4 | from zope.app.form.browser import ASCIIWidget |
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| 5 | from zope.app.form.interfaces import ConversionError |
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| 6 | from zope.app.form.browser.textwidgets import renderElement |
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| 7 | from zope.i18n import MessageFactory |
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| 8 | |
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| 9 | from Acquisition import aq_inner |
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| 10 | |
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| 11 | from Products.CMFCore.utils import getToolByName |
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| 12 | |
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| 13 | from quintagroup.captcha.core.utils import decrypt, parseKey, encrypt1, getWord |
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| 14 | |
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| 15 | _ = MessageFactory('quintagroup.formlib.captcha') |
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| 16 | |
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| 17 | |
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| 18 | class CaptchaWidget(ASCIIWidget): |
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| 19 | def __call__(self): |
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| 20 | context = self.context.context |
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| 21 | |
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| 22 | kwargs = {'type': self.type, |
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| 23 | 'name': self.name, |
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| 24 | 'id': self.name, |
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| 25 | 'cssClass': self.cssClass, |
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| 26 | 'style': self.style, |
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| 27 | 'size': self.displayWidth, |
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| 28 | 'extra': self.extra} |
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| 29 | |
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| 30 | portal_url = getToolByName(context, 'portal_url')() |
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| 31 | key = context.getCaptcha() |
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| 32 | |
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| 33 | if self._prefix: |
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| 34 | prefix = '%s.' % self._prefix |
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| 35 | else: |
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| 36 | prefix = '' |
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| 37 | |
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| 38 | return u"""<input type="hidden" value="%s" name="%shashkey" /> |
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| 39 | %s |
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| 40 | <img src="%s/getCaptchaImage/%s" alt="Enter the word"/>""" % (key, |
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| 41 | prefix, |
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| 42 | renderElement(self.tag, **kwargs), |
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| 43 | portal_url, |
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| 44 | key) |
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| 45 | |
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| 46 | def _toFieldValue(self, input): |
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| 47 | # Verify the user input against the captcha |
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| 48 | context = self.context.context |
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| 49 | request = context.REQUEST |
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| 50 | |
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| 51 | # get captcha type (static or dynamic) |
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| 52 | captcha_type = context.getCaptchaType() |
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| 53 | |
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| 54 | # validate captcha input |
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| 55 | if input and captcha_type in ['static', 'dynamic']: |
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| 56 | # make up form prefix |
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| 57 | if self._prefix: |
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| 58 | prefix = '%s.' % self._prefix |
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| 59 | else: |
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| 60 | prefix = '' |
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| 61 | |
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| 62 | hashkey = request.get('%shashkey' % prefix, '') |
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| 63 | decrypted_key = decrypt(context.captcha_key, hashkey) |
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| 64 | parsed_key = parseKey(decrypted_key) |
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| 65 | |
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| 66 | index = parsed_key['key'] |
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| 67 | date = parsed_key['date'] |
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| 68 | |
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| 69 | if captcha_type == 'static': |
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| 70 | img = getattr(context, '%s.jpg' % index) |
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| 71 | solution = img.title |
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| 72 | enc = encrypt1(input) |
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| 73 | else: |
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| 74 | enc = input |
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| 75 | solution = getWord(int(index)) |
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| 76 | |
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| 77 | captcha_tool = getToolByName(context, 'portal_captchas') |
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| 78 | if (enc != solution) or (captcha_tool.has_key(decrypted_key)) or (DateTime().timeTime() - float(date) > 3600): |
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| 79 | raise ConversionError(_(u'Please re-enter validation code.')) |
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| 80 | else: |
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| 81 | captcha_tool.addExpiredKey(decrypted_key) |
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| 82 | |
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| 83 | return super(CaptchaWidget, self)._toFieldValue(input) |
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