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import werkzeug.security
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import base64
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import website.utils.colour
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from website.constants import BACKGROUND_COLOUR
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FOREGROUND_COLOURS = (b'\0\0\0', b'\x3f\x3f\x3f', b'\x7f\x7f\x7f', b'\xbf\xbf\xbf', b'\xff\xff\xff')
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def default():
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return {'string': None, 'background_colour': None, 'foreground_colour': None}
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def gen_tripcode(password):
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tripcode = default()
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pwhash = werkzeug.security._hash_internal('pbkdf2:sha256', b'\0', password)[0]
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tripcode_data = bytes.fromhex(pwhash)[:6]
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tripcode['string'] = base64.b64encode(tripcode_data).decode()
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tripcode['background_colour'] = website.utils.colour.gen_colour(tripcode_data, BACKGROUND_COLOUR)
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tripcode['foreground_colour'] = max(FOREGROUND_COLOURS, key=lambda c: website.utils.colour._distance_sq(c, tripcode['background_colour']))
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return tripcode
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