async def _do_wait_peer(self) -> Tuple[SASCode, SASCode, SecretKey]:
claimer_private_key = PrivateKey.generate()
rep = await self._cmds.invite_1_claimer_wait_peer(
claimer_public_key=claimer_private_key.public_key)
_check_rep(rep, step_name="step 1")
shared_secret_key = generate_shared_secret_key(
our_private_key=claimer_private_key,
peer_public_key=rep["greeter_public_key"])
claimer_nonce = generate_nonce()
rep = await self._cmds.invite_2a_claimer_send_hashed_nonce(
claimer_hashed_nonce=HashDigest.from_data(claimer_nonce))
_check_rep(rep, step_name="step 2a")
claimer_sas, greeter_sas = generate_sas_codes(
claimer_nonce=claimer_nonce,
greeter_nonce=rep["greeter_nonce"],
shared_secret_key=shared_secret_key,
)
rep = await self._cmds.invite_2b_claimer_send_nonce(
claimer_nonce=claimer_nonce)
_check_rep(rep, step_name="step 2b")
return claimer_sas, greeter_sas, shared_secret_key
async def _do_wait_peer(self) -> Tuple[SASCode, SASCode, SecretKey]:
claimer_private_key = PrivateKey.generate()
rep = await self._cmds.invite_1_claimer_wait_peer(
claimer_public_key=claimer_private_key.public_key)
if rep["status"] != "ok":
raise InviteError(f"Backend error during step 1: {rep}")
shared_secret_key = generate_shared_secret_key(
our_private_key=claimer_private_key,
peer_public_key=rep["greeter_public_key"])
claimer_nonce = generate_nonce()
rep = await self._cmds.invite_2a_claimer_send_hashed_nonce(
claimer_hashed_nonce=HashDigest.from_data(claimer_nonce))
if rep["status"] == "invalid_state":
raise InvitePeerResetError()
elif rep["status"] != "ok":
raise InviteError(f"Backend error during step 2a: {rep}")
claimer_sas, greeter_sas = generate_sas_codes(
claimer_nonce=claimer_nonce,
greeter_nonce=rep["greeter_nonce"],
shared_secret_key=shared_secret_key,
)
rep = await self._cmds.invite_2b_claimer_send_nonce(
claimer_nonce=claimer_nonce)
if rep["status"] == "invalid_state":
raise InvitePeerResetError()
elif rep["status"] != "ok":
raise InviteError(f"Backend error during step 2b: {rep}")
return claimer_sas, greeter_sas, shared_secret_key
async def _do_wait_peer(self) -> Tuple[SASCode, SASCode, SecretKey]:
greeter_private_key = PrivateKey.generate()
rep = await self._cmds.invite_1_greeter_wait_peer(
token=self.token,
greeter_public_key=greeter_private_key.public_key)
if rep["status"] in ("not_found", "already_deleted"):
raise InviteNotAvailableError()
elif rep["status"] != "ok":
raise InviteError(f"Backend error during step 1: {rep}")
shared_secret_key = generate_shared_secret_key(
our_private_key=greeter_private_key,
peer_public_key=rep["claimer_public_key"])
greeter_nonce = generate_nonce()
rep = await self._cmds.invite_2a_greeter_get_hashed_nonce(
token=self.token)
if rep["status"] in ("not_found", "already_deleted"):
raise InviteNotAvailableError()
elif rep["status"] == "invalid_state":
raise InvitePeerResetError()
elif rep["status"] != "ok":
raise InviteError(f"Backend error during step 2a: {rep}")
claimer_hashed_nonce = rep["claimer_hashed_nonce"]
rep = await self._cmds.invite_2b_greeter_send_nonce(
token=self.token, greeter_nonce=greeter_nonce)
if rep["status"] in ("not_found", "already_deleted"):
raise InviteNotAvailableError()
elif rep["status"] == "invalid_state":
raise InvitePeerResetError()
elif rep["status"] != "ok":
raise InviteError(f"Backend error during step 2b: {rep}")
if HashDigest.from_data(rep["claimer_nonce"]) != claimer_hashed_nonce:
raise InviteError("Invitee nonce and hashed nonce doesn't match")
claimer_sas, greeter_sas = generate_sas_codes(
claimer_nonce=rep["claimer_nonce"],
greeter_nonce=greeter_nonce,
shared_secret_key=shared_secret_key,
)
return claimer_sas, greeter_sas, shared_secret_key
