python - Creating a valid heartbeat request -


i've been messing around heartbleed bug (mainly cloudflare challenge) , creating invalid heartbeat has been easy, i've been sending follows:

### heatbeat ###  0x18,       # content type (heartbeat) 0x03, 0x01,  # tls version 0x00, 0x03,  # length # payload 0x01,       # type (request) 0xff, 0xff  # payload length             # no payload  ### end hearbeat ###

however, when tried send valid heartbeat, server doesn't respond.

### heatbeat ###  0x18,       # content type (heartbeat) 0x03, 0x01,  # tls version 0x00, 0x03,  # length # payload 0x01,       # type (request) 0x00, 0x03  # payload length 0x68, 0x61, 0x74, # payload: hat  ### end hearbeat ###

i've tried jiggling around payload length , neither +1 or -1 work. lengths higher actual length don't work. ideas i'm doing wrong?

here's full code interested (it's based off of this)

edit: in response @warren-dew, doesn't work:

### heatbeat ###  0x18,       # content type (heartbeat) 0x03, 0x01,  # tls version 0x00, 0x03,  # length # payload 0x01,       # type (request) 0x00, 0x03  # payload length 0x68, 0x61, 0x74, # payload: hat 0x34, 0x90, 0xf0, 0xf3, # padding 0xe3, 0xb4, 0x5c, 0x9c, # padding 0x80, 0xff, 0x95, 0x74, # padding 0x9d, 0x81, 0xfa, 0xa0  # padding ### end hearbeat ###

edit: in response @warren-dew, adjusted again still not work:

### heatbeat ###  0x18,       # content type (heartbeat) 0x03, 0x01,  # tls version 0x00, 0x16,  # length <- changed # payload 0x01,       # type (request) 0x00, 0x03  # payload length 0x68, 0x61, 0x74, # payload: hat 0x34, 0x90, 0xf0, 0xf3, # padding 0xe3, 0xb4, 0x5c, 0x9c, # padding 0x80, 0xff, 0x95, 0x74, # padding 0x9d, 0x81, 0xfa, 0xa0  # padding ### end hearbeat ###

a legal heartbeat message has, in addition payload, 3 bytes of metadata - message type , payload length - , minimum of 16 bytes of padding. result, message length has exceed payload length @ least 19 bytes, rather merely being equal it. see rfc 6520 more detail.


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