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28 lines
938 B
28 lines
938 B
try: |
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import cPickle as pickle |
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except ImportError: |
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import pickle |
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from django.conf import settings |
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from django.utils.hashcompat import md5_constructor |
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from django.forms import BooleanField |
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def security_hash(request, form, *args): |
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""" |
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Calculates a security hash for the given Form instance. |
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This creates a list of the form field names/values in a deterministic |
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order, pickles the result with the SECRET_KEY setting, then takes an md5 |
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hash of that. |
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""" |
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data = [(bf.name, bf.field.clean(bf.data) or '') for bf in form] |
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data.extend(args) |
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data.append(settings.SECRET_KEY) |
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# Use HIGHEST_PROTOCOL because it's the most efficient. It requires |
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# Python 2.3, but Django requires 2.3 anyway, so that's OK. |
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pickled = pickle.dumps(data, pickle.HIGHEST_PROTOCOL) |
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return md5_constructor(pickled).hexdigest() |
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