def decrypt_data(encryption_key, data, iv=None):
"""
Function to decrypt the outData in the result
Parameters:
- encryption_key is the key used to decrypt the encrypted data of the
response.
- iv is an initialization vector if required by the data encryption
algorithm.
The default is all zeros.
- data is the parameter data in outData part of workorder request as
per TCF API 6.1.7 Work Order Data Formats.
Returns decrypted data as a string
"""
if not data:
logger.debug("Outdata is empty, nothing to decrypt")
return data
data_byte = crypto.base64_to_byte_array(data)
logger.debug("encryption_key: %s", encryption_key)
if iv is not None:
decrypt_result = crypto.SKENC_DecryptMessage(encryption_key, iv,
data_byte)
else:
decrypt_result = crypto.SKENC_DecryptMessage(encryption_key, data_byte)
result = crypto.byte_array_to_string(decrypt_result)
logger.info("Decryption result at client - %s", result)
return result
def evaluate(self) :
serialized_byte_array = crypto.string_to_byte_array(self.work_order)
encrypted_request = crypto.byte_array_to_base64(serialized_byte_array)
try :
encoded_encrypted_response = self.enclave_service.send_to_sgx_worker(encrypted_request)
assert encoded_encrypted_response
except :
logger.exception('workorder request invocation failed')
raise
try :
decrypted_response = crypto.base64_to_byte_array(encoded_encrypted_response)
response_string = crypto.byte_array_to_string(decrypted_response)
response_parsed = json.loads(response_string[0:-1])
except :
logger.exception('workorder response is invalid')
raise
return response_parsed