Fix exploit on chrome

[mpgn]

On chrome, the exploit doesn't work because of multiple exceptions that break completely the socket connection. Those errors were not raised on firefox.

Edit: fix

try:
       (content_type, version, length) = struct.unpack('>BHH', ssl_header)
except struct.error as err:
       return

[mpgn]

Another problem:

Chrome (2 requests) VS Firefox (1 request)

Every request send to the server with chrome is followed by another request, the favivon !

[mpgn]

Well, chrome doesn't handle data like firefox... After sending multiple request with javascript, the server always return hmac error even if there is no hmac error. Very very strange