kopia lustrzana https://github.com/espressif/esp-idf
54 wiersze
1.8 KiB
Python
54 wiersze
1.8 KiB
Python
# SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD
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# SPDX-License-Identifier: Apache-2.0
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#
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# APIs for interpreting and creating protobuf packets for
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# protocomm endpoint with security type protocomm_security0
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import proto
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from utils import str_to_bytes
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from .security import Security
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class Security0(Security):
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def __init__(self, verbose):
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# Initialize state of the security1 FSM
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self.session_state = 0
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self.verbose = verbose
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Security.__init__(self, self.security0_session)
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def security0_session(self, response_data):
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# protocomm security0 FSM which interprets/forms
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# protobuf packets according to present state of session
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if (self.session_state == 0):
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self.session_state = 1
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return self.setup0_request()
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if (self.session_state == 1):
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self.setup0_response(response_data)
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return None
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def setup0_request(self):
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# Form protocomm security0 request packet
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setup_req = proto.session_pb2.SessionData()
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setup_req.sec_ver = 0
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session_cmd = proto.sec0_pb2.S0SessionCmd()
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setup_req.sec0.sc.MergeFrom(session_cmd)
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return setup_req.SerializeToString().decode('latin-1')
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def setup0_response(self, response_data):
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# Interpret protocomm security0 response packet
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setup_resp = proto.session_pb2.SessionData()
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setup_resp.ParseFromString(str_to_bytes(response_data))
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# Check if security scheme matches
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if setup_resp.sec_ver != proto.session_pb2.SecScheme0:
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raise RuntimeError('Incorrect security scheme')
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def encrypt_data(self, data):
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# Passive. No encryption when security0 used
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return data
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def decrypt_data(self, data):
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# Passive. No encryption when security0 used
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return data
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