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apps.fido_u2f: remove exception classes

This commit is contained in:
Jan Pochyla 2017-05-23 15:30:03 +02:00
parent a8bb8089a6
commit fab5b9a98c
1 changed files with 13 additions and 18 deletions
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31
src/apps/fido_u2f/__init__.py
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@ -74,16 +74,6 @@ _APDU_LC3 = const(6) # uint8_t lc3; // Length field, LSB
_APDU_DATA = const(7) # uint8_t data[1]; // Data field
class HidError(Exception):
'''Raised on U2F HID error with a HID error code.'''
pass
class StatusError(Exception):
'''Raised on U2F protocol error with a command status.'''
pass
def frame_init() -> dict:
# uint32_t cid; // Channel identifier
# uint8_t cmd; // Command - b7 set
@ -208,12 +198,13 @@ def read_cmd(iface: int) -> Cmd:
cfrm = overlay_struct(buf, desc_cont)
if cfrm.seq != seq:
raise HidError(_ERR_INVALID_SEQ)
if cfrm.cid != cid:
# TODO: send a reply and continue
raise HidError(_ERR_CHANNEL_BUSY)
send_cmd(cmd_error(cfrm.cid, _ERR_CHANNEL_BUSY), iface)
continue
if cfrm.seq != seq:
send_cmd(cmd_error(cfrm.cid, _ERR_INVALID_SEQ), iface)
raise Exception(_ERR_INVALID_SEQ)
datalen += utils.memcpy(data, datalen, cfrm.data, 0, bcnt - datalen)
seq += 1
@ -294,12 +285,12 @@ async def dispatch_cmd(req: Cmd) -> Cmd:
return req
else:
log.warning(__name__, '_ERR_INVALID_CMD: %d', req.cmd)
raise HidError(_ERR_INVALID_CMD)
return cmd_error(req.cid, _ERR_INVALID_CMD)
def cmd_init(req: Cmd) -> Cmd:
if req.cid == 0:
raise HidError(_ERR_INVALID_CID)
return cmd_error(req.cid, _ERR_INVALID_CID)
elif req.cid == _CID_BROADCAST:
resp_cid = random.uniform(0xfffffffe) + 1 # uint32_t except 0 and 0xffffffff
else:
@ -321,7 +312,7 @@ async def msg_register(req: Msg) -> Cmd:
from apps.common import storage
if not storage.is_initialized():
raise StatusError(_SW_CONDITIONS_NOT_SATISFIED)
return msg_error(req, _SW_CONDITIONS_NOT_SATISFIED)
chal = req.data[:32]
app_id = req.data[32:]
@ -389,3 +380,7 @@ def msg_version(req: Msg) -> Cmd:
def msg_error(req: Msg, code: int) -> Cmd:
return Cmd(req.cid, _CMD_MSG, ustruct.pack('>H', code))
def cmd_error(cid: int, code: int) -> Cmd:
return Cmd(cid, _CMD_ERROR, ustruct.pack('>B', code))