mirror of
https://github.com/trezor/trezor-firmware.git
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74 lines
1.7 KiB
Python
74 lines
1.7 KiB
Python
import struct
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EVENT_TYPE_START = 2
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EVENT_TYPE_STOP = 3
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EVENT_TYPE_OPEN = 4
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EVENT_TYPE_CLOSE = 5
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EVENT_TYPE_OUTPUT = 6
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EVENT_TYPE_CREATE2 = 11
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EVENT_TYPE_INTPUT2 = 12
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DATA_MAX = 4096
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EVENT_LENGTH = 4380
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INPUT2_REQ_FMT = f"< H {DATA_MAX}s"
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CREATE2_REQ_FMT = f"< 128s 64s 64s H H L L L L {DATA_MAX}s"
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START_REQ_FMT = "< Q"
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OUTPUT_REQ_FMT = f"< {DATA_MAX}s H B"
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def pack_event(ev_type, request):
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return ev_type.to_bytes(4, byteorder="little") + request
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def unpack_event(buf):
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return int.from_bytes(buf[:4], byteorder="little"), buf[4:]
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def parse_event(event):
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assert len(event) == EVENT_LENGTH
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ev_type, request = unpack_event(event)
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if ev_type == EVENT_TYPE_START:
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request = struct.unpack_from(START_REQ_FMT, request)
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elif ev_type == EVENT_TYPE_STOP:
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request = []
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elif ev_type == EVENT_TYPE_OPEN:
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request = []
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elif ev_type == EVENT_TYPE_CLOSE:
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request = []
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elif ev_type == EVENT_TYPE_OUTPUT:
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data, size, rtype = struct.unpack_from(OUTPUT_REQ_FMT, request)
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data = data[:size]
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request = [data, size, rtype]
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return ev_type, request
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def create_create2_event(
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name, phys, uniq, bus, vendor, product, version, country, rd_data
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):
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uhid_create2_req = struct.pack(
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CREATE2_REQ_FMT,
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name,
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phys,
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uniq,
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len(rd_data),
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bus,
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vendor,
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product,
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version,
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country,
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rd_data,
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)
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event = pack_event(EVENT_TYPE_CREATE2, uhid_create2_req)
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return event
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def create_input2_event(data):
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uhid_input2_req = struct.pack(INPUT2_REQ_FMT, len(data), data)
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event = pack_event(EVENT_TYPE_INTPUT2, uhid_input2_req)
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return event
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