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https://github.com/aljazceru/python-teos.git
synced 2026-01-25 09:14:23 +01:00
Updates get_appointment status messages and small changes
This commit is contained in:
Sergi Delgado Segura
51
pisa-btc/apps/cli/blob.py
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51
pisa-btc/apps/cli/blob.py
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from binascii import hexlify, unhexlify
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from hashlib import sha256
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from cryptography.hazmat.primitives.ciphers.aead import AESGCM
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from conf import SUPPORTED_HASH_FUNCTIONS, SUPPORTED_CIPHERS
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class Blob:
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def __init__(self, data, cipher, hash_function):
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self.data = data
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self.cipher = cipher
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self.hash_function = hash_function
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# FIXME: We only support SHA256 for now
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if self.hash_function.upper() not in SUPPORTED_HASH_FUNCTIONS:
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raise Exception("Hash function not supported ({}). Supported Hash functions: {}"
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.format(self.hash_function, SUPPORTED_HASH_FUNCTIONS))
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# FIXME: We only support AES-GCM-128 for now
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if self.cipher.upper() not in SUPPORTED_CIPHERS:
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raise Exception("Cipher not supported ({}). Supported ciphers: {}".format(self.hash_function,
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SUPPORTED_CIPHERS))
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def encrypt(self, tx_id, debug, logging):
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# Transaction to be encrypted
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# FIXME: The blob data should contain more things that just the transaction. Leaving like this for now.
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tx = unhexlify(self.data)
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# FIXME: tx_id should not be necessary (can be derived from tx SegWit-like). Passing it for now
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# Extend the key using HKDF
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tx_id = unhexlify(tx_id)
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# master_key = H(tx_id | tx_id)
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master_key = sha256(tx_id + tx_id).digest()
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# The 16 MSB of the master key will serve as the AES GCM 128 secret key. The 16 LSB will serve as the IV.
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sk = master_key[:16]
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nonce = master_key[16:]
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# Encrypt the data
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aesgcm = AESGCM(sk)
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encrypted_blob = aesgcm.encrypt(nonce=nonce, data=tx, associated_data=None)
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encrypted_blob = hexlify(encrypted_blob).decode()
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if debug:
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logging.info("[Client] creating new blob")
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logging.info("[Client] master key: {}".format(hexlify(master_key).decode()))
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logging.info("[Client] sk: {}".format(hexlify(sk).decode()))
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logging.info("[Client] nonce: {}".format(hexlify(nonce).decode()))
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logging.info("[Client] encrypted_blob: {}".format(encrypted_blob))
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return encrypted_blob
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188
pisa-btc/apps/cli/pisa-cli.py
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188
pisa-btc/apps/cli/pisa-cli.py
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import requests
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import re
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import os
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import sys
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import json
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from getopt import getopt, GetoptError
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from sys import argv
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import logging
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from conf import CLIENT_LOG_FILE
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from hashlib import sha256
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from binascii import unhexlify
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from apps.blob import Blob
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from requests import ConnectTimeout, ConnectionError
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from apps import DEFAULT_PISA_API_SERVER, DEFAULT_PISA_API_PORT
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def add_appointment(args):
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use_help = "Use 'help add_appointment' for help of how to use the command."
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if args:
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arg_opt = args.pop(0)
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try:
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if arg_opt in ['-h', '--help']:
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sys.exit(help_add_appointment())
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if arg_opt in ['-f', '--file']:
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if args:
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fin = args.pop(0)
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if os.path.isfile(fin):
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appointment_data = json.load(open(fin))
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else:
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sys.exit("Can't find file " + fin)
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else:
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sys.exit("No file provided as appointment. " + use_help)
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else:
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appointment_data = json.loads(arg_opt)
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except json.JSONDecodeError:
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sys.exit("Non-JSON encoded data provided as appointment. " + use_help)
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else:
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sys.exit("No appointment data provided. " + use_help)
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valid_locator = check_txid_format(appointment_data.get('tx_id'))
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if valid_locator:
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pisa_url = "http://{}:{}".format(pisa_api_server, pisa_api_port)
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appointment = build_appointment(appointment_data.get('tx'), appointment_data.get('tx_id'),
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appointment_data.get('start_time'), appointment_data.get('end_time'),
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appointment_data.get('dispute_delta'), debug, logging)
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if debug:
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logging.info("[Client] sending appointment to PISA")
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try:
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r = requests.post(url=pisa_url, json=json.dumps(appointment), timeout=5)
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if debug:
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logging.info("[Client] {} (code: {})".format(r.text, r.status_code))
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else:
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print("{} (code: {}).".format(r.text, r.status_code))
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except ConnectTimeout:
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if debug:
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logging.info("[Client] can't connect to pisa API. Connection timeout")
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else:
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sys.exit("Can't connect to pisa API. Connection timeout.")
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except ConnectionError:
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if debug:
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logging.info("[Client] can't connect to pisa API. Server cannot be reached")
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else:
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sys.exit("Can't connect to pisa API. Server cannot be reached.")
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else:
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raise sys.exit("The provided locator is not valid.")
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def build_appointment(tx, tx_id, start_block, end_block, dispute_delta, debug, logging):
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locator = sha256(unhexlify(tx_id)).hexdigest()
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cipher = "AES-GCM-128"
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hash_function = "SHA256"
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# FIXME: The blob data should contain more things that just the transaction. Leaving like this for now.
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blob = Blob(tx, cipher, hash_function)
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# FIXME: tx_id should not be necessary (can be derived from tx SegWit-like). Passing it for now
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encrypted_blob = blob.encrypt(tx_id, debug, logging)
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appointment = {"locator": locator, "start_time": start_block, "end_time": end_block,
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"dispute_delta": dispute_delta, "encrypted_blob": encrypted_blob, "cipher": cipher, "hash_function":
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hash_function}
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return appointment
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def check_txid_format(txid):
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if len(txid) != 64:
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raise Exception("txid does not matches the expected size (32-byte / 64 hex chars).")
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return re.search(r'^[0-9A-Fa-f]+$', txid) is not None
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def show_usage(show_and_quit=False):
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print("USAGE: "
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"\n\tpython pisa-cli.py [global options] command [command options] [arguments]"
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"\n\nCOMMANDS:"
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"\n\tadd_appointment \tRegisters a json formatted appointment to the PISA server."
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"\n\tget_appointment \tGets json formatted data about an appointment from the PISA server."
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"\n\thelp \t\t\tShows a list of commands or help for a specific command."
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"\n\nGLOBAL OPTIONS:"
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"\n\t-s, --server \tAPI server where to send the requests. Defaults to localhost (modifiable in __init__.py)"
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"\n\t-p, --port \tAPI port where to send the requests. Defaults to 9814 (modifiable in __init__.py)"
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"\n\t-d, --debug \tshows debug information and stores it in pisa.log"
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"\n\t-h --help \tshows this message.")
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if show_and_quit:
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exit(-1)
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if __name__ == '__main__':
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debug = False
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command = None
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appointment_data = None
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pisa_api_server = DEFAULT_PISA_API_SERVER
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pisa_api_port = DEFAULT_PISA_API_PORT
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commands = ['add_appointment', 'get_appointment', 'help']
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try:
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opts, args = getopt(argv[1:], 's:p:dh', ['server', 'port', 'debug', 'help'])
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for opt, arg in opts:
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if opt in ['-s', 'server']:
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if arg:
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pisa_api_server = arg
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if opt in ['-p', '--port']:
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if arg:
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pisa_api_port = int(arg)
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if opt in ['-d', '--debug']:
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debug = True
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if opt in ['-h', '--help']:
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show_usage()
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if args:
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command = args.pop(0)
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if command in commands:
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if command == 'add_appointment':
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appointment_data = add_appointment(args)
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elif command == 'get_appointment':
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pass
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elif command == 'help':
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if args:
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command = args.pop(0)
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if command == 'add_appointment':
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pass
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elif command == "get_appointment":
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pass
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else:
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sys.exit("Unknown command. Use help to check the list of available commands.")
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else:
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show_usage()
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else:
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sys.exit("Unknown command. Use help to check the list of available commands.")
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except GetoptError as e:
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print(e)
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except json.JSONDecodeError as e:
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print('Non-JSON encoded appointment passed as parameter.')
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# Configure logging
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logging.basicConfig(format='%(asctime)s %(message)s', level=logging.INFO, handlers=[
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logging.FileHandler(CLIENT_LOG_FILE),
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logging.StreamHandler()
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])
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