def add_contents(self, alicia, my_label, contents):
"""
cid = client.add_contents(
policy_pubkey=policy_pub_key
)
"""
policy_pubkey = alicia.get_policy_pubkey_from_label(my_label)
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
heart_rate = 80
now = time.time()
kits = list()
heart_rate = contents
now += 3
heart_rate_data = { 'heart_rate': heart_rate, 'timestamp': now, }
plaintext = msgpack.dumps(heart_rate_data, use_bin_type=True)
message_kit, _signature = data_source.encrypt_message(plaintext)
kit_bytes = message_kit.to_bytes()
kits.append(kit_bytes)
data = { 'data_source': data_source_public_key, 'kits': kits, }
# print("🚀 ADDING TO IPFS D-STORAGE NETWORK 🚀")
d = msgpack.dumps(data, use_bin_type=True)
### NETWORK ERROR OUT ON FALLBACK
cid = self.ipfs_gateway_api.add_bytes(d)
# print("File Address:\t%s" % cid)
return cid
def enrico(click_config, action, policy_encrypting_key, dry_run, http_port,
message):
"""
"Enrico the Encryptor" management commands.
"""
#
# Validate
#
if not policy_encrypting_key:
raise click.BadArgumentUsage(
'--policy-encrypting-key is required to start Enrico.')
# Banner
emitter = click_config.emitter
emitter.clear()
emitter.banner(ENRICO_BANNER.format(policy_encrypting_key))
#
# Make Enrico
#
policy_encrypting_key = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_encrypting_key))
ENRICO = Enrico(policy_encrypting_key=policy_encrypting_key)
ENRICO.controller.emitter = emitter # TODO: set it on object creation? Or not set at all?
#
# Actions
#
if action == 'run':
# RPC
if click_config.json_ipc:
rpc_controller = ENRICO.make_rpc_controller()
_transport = rpc_controller.make_control_transport()
rpc_controller.start()
return
ENRICO.log.info('Starting HTTP Character Web Controller')
controller = ENRICO.make_web_controller()
return controller.start(http_port=http_port, dry_run=dry_run)
elif action == 'encrypt':
# Validate
if not message:
raise click.BadArgumentUsage(
'--message is a required flag to encrypt.')
# Request
encryption_request = {'message': message}
response = ENRICO.controller.encrypt_message(
request=encryption_request)
return response
else:
raise click.BadArgumentUsage
def uploadData(self, label, file):
policy_pubkey = self.Alice.get_policy_encrypting_key_from_label(label.encode("utf-8"))
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
now = time.time()
kits = list()
now += 5
data_representation = { 'data': file, 'timestamp': now, }
plaintext = msgpack.dumps(data_representation, use_bin_type=True)
message_kit, _signature = data_source.encrypt_message(plaintext)
kit_bytes = message_kit.to_bytes()
kits.append(kit_bytes)
data = { 'data_source': data_source_public_key, 'kits': kits, }
d = msgpack.dumps(data, use_bin_type=True)
ipfs_hash = self.ipfs_gateway_api.add_bytes(d)
receipt = {
"data_source_public_key" : data_source_public_key.hex(),
"hash_key" : ipfs_hash
}
return receipt
def __call__(self):
enrico = Enrico(
policy_encrypting_key=enacted_blockchain_policy.public_key)
message = "Welcome to flippering number {}.".format(
len(self.messages)).encode()
message_kit, _signature = enrico.encrypt_message(message)
self.messages.append((message_kit, enrico))
return message_kit, enrico
def enrico(click_config, action, policy_encrypting_key, dry_run, http_port, message):
"""
Start and manage an "Enrico" character control HTTP server
"""
#
# Validate
#
if not policy_encrypting_key:
raise click.BadArgumentUsage('--policy-encrypting-key is required to start Enrico.')
# Banner
click.clear()
if not click_config.json_ipc and not click_config.quiet:
click.secho(ENRICO_BANNER)
#
# Make Enrico
#
policy_encrypting_key = UmbralPublicKey.from_bytes(bytes.fromhex(policy_encrypting_key))
ENRICO = Enrico(policy_encrypting_key=policy_encrypting_key)
if click_config.json_ipc:
ENRICO.controller.emitter = JSONRPCStdoutEmitter(quiet=click_config.quiet)
#
# Actions
#
if action == 'run':
# RPC
if click_config.json_ipc:
rpc_controller = ENRICO.make_rpc_controller()
_transport = rpc_controller.make_control_transport()
rpc_controller.start()
return
ENRICO.log.info('Starting HTTP Character Web Controller')
controller = ENRICO.make_web_controller()
return controller.start(http_port=http_port, dry_run=dry_run)
elif action == 'encrypt':
# Validate
if not message:
raise click.BadArgumentUsage('--message is a required flag to encrypt.')
# Request
encryption_request = {'message': message}
response = ENRICO.controller.encrypt_message(request=encryption_request)
return response
else:
raise click.BadArgumentUsage
def post(self):
policy_key = request.json['policy_pubkey']
data = request.json['data']
enrico = Enrico(policy_encrypting_key=UmbralPublicKey.from_bytes(
bytes.fromhex(policy_key)))
message_kit, _signature = enrico.encrypt_message(data.encode())
result = {}
result["ciphertext"] = message_kit.to_bytes().hex()
result["enrico"] = bytes(enrico.stamp).hex()
return json.dumps(result)
def _make_message_kits(policy_pubkey):
messages = [b"plaintext1", b"plaintext2", b"plaintext3"]
message_kits = []
for message in messages:
# Using different Enricos, because why not.
enrico = Enrico(policy_encrypting_key=policy_pubkey)
message_kit = enrico.encrypt_message(message)
message_kits.append(message_kit)
return messages, message_kits
def test_alice_can_decrypt(federated_alice):
label = b"boring test label"
policy_pubkey = federated_alice.get_policy_encrypting_key_from_label(label)
enrico = Enrico(policy_encrypting_key=policy_pubkey)
message = b"boring test message"
message_kit = enrico.encrypt_message(plaintext=message)
# Interesting thing: if Alice wants to decrypt, she needs to provide the label directly.
cleartexts = federated_alice.decrypt_message_kit(label=label,
message_kit=message_kit)
assert cleartexts == [message]
def reencrypt_segment(enc_data, policy_metadata, listener):
policy_pubkey = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_metadata["policy_pubkey"]))
alices_sig_pubkey = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_metadata["alice_sig_pubkey"]))
label = policy_metadata["label"].encode()
data = msgpack.loads(enc_data)
message_kit = UmbralMessageKit.from_bytes((data[b'track_segment_data']))
data_source = Enrico.from_public_keys(verifying_key=data[b'data_source'],
policy_encrypting_key=policy_pubkey)
plaintext = None
try:
start = timer()
retrieved_plaintexts = listener.retrieve(
message_kit,
label=label,
enrico=data_source,
alice_verifying_key=alices_sig_pubkey)
end = timer()
plaintext = retrieved_plaintexts[0]
except Exception as e:
# We just want to know what went wrong and continue the demo
traceback.print_exc()
return plaintext
def decrypt(self, channel_reader: object) -> bytes:
'''
Decrypt extsting message using ChannelReader instance
:param BOB:
:return:
'''
policy_pubkey_restored = UmbralPublicKey.from_bytes(
self.policy_pubkey_bytes)
data_source_restored = Enrico.from_public_keys(
{SigningPower: self.data_source_pubkey_bytes},
policy_encrypting_key=policy_pubkey_restored)
channel_reader.BOB.join_policy(self.label_bytes,
self.alice_pubkey_bytes)
alices_sig_pubkey = UmbralPublicKey.from_bytes(
bytes(self.alice_pubkey_bytes))
message_kit_object = UmbralMessageKit.from_bytes(self.kit_bytes)
return channel_reader.BOB.retrieve(
message_kit=message_kit_object,
data_source=data_source_restored,
alice_verifying_key=alices_sig_pubkey,
label=self.label_bytes)
def decrypt_data(self, data_source_public_key, data, policy_info):
"""
Decrypt data
Args:
data_source_public_key (bytes): data_source_public_key
data (bytes): encrypted data
policy_info (dict): dict containing policy_pubkey, alice_sig_pubkey and label keys
Returns:
retrieved_plaintexts (list): list of str
"""
policy_pubkey = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_info["policy_pubkey"]))
alice_sig_pubkey = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_info["alice_sig_pubkey"]))
label = policy_info["label"].encode()
self.bob.join_policy(label, alice_sig_pubkey)
message_kit = UmbralMessageKit.from_bytes(data)
data_source = Enrico.from_public_keys(
verifying_key=data_source_public_key,
policy_encrypting_key=policy_pubkey)
retrieved_plaintexts = self.bob.retrieve(
message_kit,
label=label,
enrico=data_source,
alice_verifying_key=alice_sig_pubkey)
retrieved_plaintexts = [
x.decode('utf-8') for x in retrieved_plaintexts
]
return retrieved_plaintexts
def enrico_control_from_alice(federated_alice, random_policy_label):
enrico = Enrico.from_alice(federated_alice, random_policy_label)
enrico_control = enrico.make_wsgi_app()
enrico_control.config['DEBUG'] = True
enrico_control.config['TESTING'] = True
yield enrico_control.test_client()
def ensure_correct_sender(
self,
enrico: Optional["Enrico"] = None,
policy_encrypting_key: Optional[UmbralPublicKey] = None):
"""
Make sure that the sender of the message kit is set and corresponds to
the given ``enrico``, or create it from the given ``policy_encrypting_key``.
"""
if self.sender:
if enrico and self.sender != enrico:
raise ValueError(
f"Mismatched sender: the object has {self.sender}, provided {enrico}"
)
elif enrico:
self.sender = enrico
elif self.sender_verifying_key and policy_encrypting_key:
# Well, after all, this is all we *really* need.
from nucypher.characters.lawful import Enrico
self.sender = Enrico.from_public_keys(
verifying_key=self.sender_verifying_key,
policy_encrypting_key=policy_encrypting_key)
else:
raise ValueError(
"No information provided to set the message kit sender. "
"Need eiter `enrico` or `policy_encrypting_key` to be given.")
def reset(self, plaintext_passthrough=False):
self.enrico = Enrico(
policy_encrypting_key=enacted_blockchain_policy.public_key)
self.messages = []
self.plaintexts = []
self.plaintext_passthrough = plaintext_passthrough
return self(), self.enrico
def decrypt(self, bob, item_cid, pol, sig, lab):
policy_pubkey = UmbralPublicKey.from_bytes(bytes.fromhex(pol))
alices_sig_pubkey = UmbralPublicKey.from_bytes(bytes.fromhex(sig))
label = lab.encode()
dat = self.ipfs_gateway_api.cat(item_cid)
doctor = bob
doctor.join_policy(label, alices_sig_pubkey)
data = msgpack.loads(dat, raw=False)
message_kits = (UmbralMessageKit.from_bytes(k) for k in data['kits'])
data_source = Enrico.from_public_keys(
{SigningPower: data['data_source']},
policy_encrypting_key=policy_pubkey
)
message_kit = next(message_kits)
start = timer()
retrieved_plaintexts = doctor.retrieve(
label=label,
message_kit=message_kit,
data_source=data_source,
alice_verifying_key=alices_sig_pubkey
)
end = timer()
plaintext = msgpack.loads(retrieved_plaintexts[0], raw=False)
heart_rate = plaintext['heart_rate']
timestamp = maya.MayaDT(plaintext['timestamp'])
terminal_size = shutil.get_terminal_size().columns
max_width = min(terminal_size, 120)
columns = max_width - 12 - 27
scale = columns / 40
retrieval_time = "Retrieval time: {:8.2f} ms".format(1000 * (end - start))
line = heart_rate# + " " + retrieval_time
return line
def decrypt(self, label: bytes, message_kit: bytes) -> dict:
"""
Character control endpoint to allow Alice to decrypt her own data.
"""
from nucypher.characters.lawful import Enrico
policy_encrypting_key = self.character.get_policy_encrypting_key_from_label(label)
# TODO #846: May raise UnknownOpenSSLError and InvalidTag.
message_kit = UmbralMessageKit.from_bytes(message_kit)
enrico = Enrico.from_public_keys(
verifying_key=message_kit.sender_verifying_key,
policy_encrypting_key=policy_encrypting_key,
label=label
)
plaintexts = self.character.decrypt_message_kit(
message_kit=message_kit,
data_source=enrico,
label=label
)
response = {'cleartexts': plaintexts}
return response
def retrieve(self,
label: bytes,
policy_encrypting_key: bytes,
alice_verifying_key: bytes,
message_kit: bytes,
treasure_map: Union[bytes, str, 'TreasureMap'] = None):
"""
Character control endpoint for re-encrypting and decrypting policy data.
"""
from nucypher.characters.lawful import Enrico
policy_encrypting_key = UmbralPublicKey.from_bytes(
policy_encrypting_key)
alice_verifying_key = UmbralPublicKey.from_bytes(alice_verifying_key)
message_kit = UmbralMessageKit.from_bytes(
message_kit
) # TODO #846: May raise UnknownOpenSSLError and InvalidTag.
enrico = Enrico.from_public_keys(
verifying_key=message_kit.sender_verifying_key,
policy_encrypting_key=policy_encrypting_key,
label=label)
self.character.join_policy(label=label,
alice_verifying_key=alice_verifying_key)
plaintexts = self.character.retrieve(
message_kit,
enrico=enrico,
alice_verifying_key=alice_verifying_key,
label=label,
treasure_map=treasure_map)
response_data = {'cleartexts': plaintexts}
return response_data
def _create_enrico(emitter, policy_encrypting_key):
policy_encrypting_key = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_encrypting_key))
ENRICO = Enrico(policy_encrypting_key=policy_encrypting_key)
ENRICO.controller.emitter = emitter # TODO: set it on object creation? Or not set at all?
return ENRICO
def retrieve(self,
label: bytes,
policy_encrypting_key: bytes,
alice_verifying_key: bytes,
message_kit: bytes):
"""
Character control endpoint for re-encrypting and decrypting policy data.
"""
from nucypher.characters.lawful import Enrico
policy_encrypting_key = UmbralPublicKey.from_bytes(policy_encrypting_key)
alice_pubkey_sig = UmbralPublicKey.from_bytes(alice_verifying_key)
message_kit = UmbralMessageKit.from_bytes(message_kit) # TODO: May raise UnknownOpenSSLError and InvalidTag.
data_source = Enrico.from_public_keys({SigningPower: message_kit.sender_pubkey_sig},
policy_encrypting_key=policy_encrypting_key,
label=label)
self.bob.join_policy(label=label, alice_pubkey_sig=alice_pubkey_sig)
plaintexts = self.bob.retrieve(message_kit=message_kit,
data_source=data_source,
alice_verifying_key=alice_pubkey_sig,
label=label)
response_data = {'cleartexts': plaintexts}
return response_data
def test_blockchain_ursulas_reencrypt(blockchain_ursulas, blockchain_alice,
blockchain_bob, policy_value):
label = b'bbo'
# TODO: Make sample selection buffer configurable - #1061
# Currently, it only supports N<=6, since for N=7, it tries to sample 11 ursulas due to wiggle room,
# and blockchain_ursulas only contains 10.
# For N >= 7 : NotEnoughBlockchainUrsulas: Cannot create policy with 7 arrangements: There are 10 active stakers, need at least 11.
m = n = 6
expiration = maya.now() + datetime.timedelta(days=5)
_policy = blockchain_alice.grant(bob=blockchain_bob,
label=label,
m=m,
n=n,
expiration=expiration,
value=policy_value)
enrico = Enrico.from_alice(blockchain_alice, label)
message = b"Oh, this isn't even BO. This is beyond BO. It's BBO."
message_kit, signature = enrico.encrypt_message(message)
blockchain_bob.join_policy(label, bytes(blockchain_alice.stamp))
plaintext = blockchain_bob.retrieve(message_kit, enrico,
blockchain_alice.stamp, label)
assert plaintext[0] == message
def _create_enrico(emitter, policy_encrypting_key):
policy_encrypting_key = UmbralPublicKey.from_bytes(
bytes.fromhex(policy_encrypting_key))
ENRICO = Enrico(policy_encrypting_key=policy_encrypting_key)
ENRICO.controller.emitter = emitter
return ENRICO
def test_federated_alice_can_decrypt(federated_alice, federated_bob):
"""
Test that alice can decrypt data encrypted by an enrico
for her own derived policy pubkey.
"""
# Setup the policy details
threshold, shares = 2, 3
policy_end_datetime = maya.now() + datetime.timedelta(days=5)
label = b"this_is_the_path_to_which_access_is_being_granted"
policy = federated_alice.create_policy(
bob=federated_bob,
label=label,
threshold=threshold,
shares=shares,
expiration=policy_end_datetime,
)
enrico = Enrico.from_alice(
federated_alice,
policy.label,
)
plaintext = b"this is the first thing i'm encrypting ever."
# use the enrico to encrypt the message
message_kit = enrico.encrypt_message(plaintext)
# decrypt the data
decrypted_data = federated_alice.decrypt_message_kit(
label=policy.label,
message_kit=message_kit,
)
assert [plaintext] == decrypted_data
def test_blockchain_ursulas_reencrypt(blockchain_ursulas, blockchain_alice,
blockchain_bob, policy_value):
label = b'bbo'
# TODO: Investigate issues with wiggle room and additional ursulas during sampling. See also #1061 and #1090
# 1 <= N <= 4 : OK, although for N=4 it can fail with very small probability (<1%)
# M = N = 5: Fails with prob. ~66% --> Cannot create policy with 5 arrangements: Selection failed after 5 attempts
# N == 6 : NotEnoughBlockchainUrsulas: Cannot create policy with 6 arrangements: Selection failed after 5 attempts
# N >= 7 : NotEnoughBlockchainUrsulas: Cannot create policy with 7 arrangements: Cannot create policy with 7 arrangements: 10 stakers are available, need 11 (for wiggle room)
m = n = 3
expiration = maya.now() + datetime.timedelta(days=5)
_policy = blockchain_alice.grant(bob=blockchain_bob,
label=label,
m=m,
n=n,
expiration=expiration,
value=policy_value)
enrico = Enrico.from_alice(blockchain_alice, label)
message = b"Oh, this isn't even BO. This is beyond BO. It's BBO."
message_kit, signature = enrico.encrypt_message(message)
blockchain_bob.join_policy(label, bytes(blockchain_alice.stamp))
plaintext = blockchain_bob.retrieve(message_kit, enrico,
blockchain_alice.stamp, label)
assert plaintext[0] == message
def encrypt_data(plain_text, datasource_filename):
POLICY_FILENAME = "policy-metadata.json"
POLICY_FILE = os.path.join(
settings.BASE_DIR,
'nucypher_utils',
'nucypher_data',
POLICY_FILENAME,
)
with open(POLICY_FILE, 'rb') as fp:
policy_pubkey_data = json.load(fp)
policy_pubkey_string = policy_pubkey_data['policy_pubkey']
policy_pubkey_bytes = unhexlify(policy_pubkey_string)
policy_pubkey = keys.UmbralPublicKey.from_bytes(policy_pubkey_bytes)
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
plain_text = bytes(plain_text, 'utf-8')
message_kit, _signature = data_source.encrypt_message(plain_text)
kit_bytes = message_kit.to_bytes()
kit = kit_bytes
data = {
'data_source_public_key': data_source_public_key,
'kits': kit,
}
# data souce pub key naming convention:
# author_name-article_title-article_id-datasource-pubkey.msgpack
DATA_SOURCE_DIR = os.path.join(
settings.BASE_DIR,
'nucypher_utils',
'nucypher_data',
)
DATA_SOURCE_FILE_NAME = datasource_filename
with open(os.path.join(DATA_SOURCE_DIR, DATA_SOURCE_FILE_NAME),
"wb") as file:
msgpack.dump(data, file, use_bin_type=True)
return kit_bytes
def test_alice_can_decrypt(federated_alice):
label = b"boring test label"
policy_pubkey = federated_alice.get_policy_pubkey_from_label(label)
enrico = Enrico(policy_encrypting_key=policy_pubkey)
message = b"boring test message"
message_kit, signature = enrico.encrypt_message(message=message)
# Interesting thing: if Alice wants to decrypt, she needs to provide the label directly.
cleartext = federated_alice.verify_from(stranger=enrico,
message_kit=message_kit,
signature=signature,
decrypt=True,
label=label)
assert cleartext == message
def mario_box_cli(plaintext_dir, alice_config, label, outfile):
# Derive Policy Encrypting Key
alice_configuration = AliceConfiguration.from_configuration_file(
filepath=alice_config)
alice = make_cli_character(character_config=alice_configuration)
alice_signing_key = alice.public_keys(SigningPower)
policy_encrypting_key = alice.get_policy_encrypting_key_from_label(
label=label.encode())
policy_encrypting_key_hex = bytes(policy_encrypting_key).hex()
output = list()
paths = list(plaintext_dir.iterdir())
click.secho(
f"Encrypting {len(paths)} files for policy {policy_encrypting_key_hex}",
fg='blue')
with click.progressbar(paths) as bar:
for path in bar:
filepath = Path(plaintext_dir, path)
with open(filepath, 'rb') as file:
plaintext = file.read()
encoded_plaintext = base64.b64encode(plaintext)
enrico = Enrico(policy_encrypting_key=policy_encrypting_key)
message_kit = enrico.encrypt_message(
plaintext=encoded_plaintext)
base64_message_kit = base64.b64encode(
bytes(message_kit)).decode()
# Collect Bob Retrieve JSON Requests
retrieve_payload = {
'label': label,
'policy-encrypting-key': policy_encrypting_key_hex,
'alice-verifying-key': bytes(alice_signing_key).hex(),
'message-kit': base64_message_kit
}
output.append(retrieve_payload)
if not outfile:
outfile = f'{policy_encrypting_key_hex}.json'
with open(outfile, 'w') as file:
file.write(json.dumps(output, indent=2))
click.secho(f"Successfully wrote output to {outfile}", fg='green')
def encrypt_data(self, plaintext):
"""
Encrypt data
Args:
plaintext (str): plaintext that should be encrypted
Returns:
label, data_source_public_key, data (bytes, bytes, byes): tuple containing label for the policy,
data source public_key & encrypted data
"""
label = ("policy️-" + os.urandom(8).hex()).encode()
policy_pubkey = self.alice.get_policy_encrypting_key_from_label(label)
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
message, _signature = data_source.encrypt_message(
plaintext.encode("utf-8"))
data = message.to_bytes()
return label, data_source_public_key, data
def encrypt_track(policy_pubkey, file_path):
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
print(file_path)
with open(file_path, "rb") as f:
plaintext = f.read()
ciphertext, signature = data_source.encrypt_message(plaintext)
print("Signature", signature)
data = {
'track_segment_data': ciphertext.to_bytes(),
'data_source': data_source_public_key
}
with open(file_path + '_encrypted', "wb") as f:
msgpack.dump(data, f, use_bin_type=True)
return True
def from_channel(cls, channel: Channel, data: bytes) -> object:
'''
Create EncryptedDataPackage from Channel & data. In other words it encrypts data usign Channel settings
:param channel: Channel instance
:param data: data to be encrypted
:return: EncryptedDataPackage instance
'''
label_bytes = channel.label_bytes
policy_pub_key_object = UmbralPublicKey.from_bytes(
channel.policy_pubkey_bytes)
data_source = Enrico(policy_encrypting_key=policy_pub_key_object)
data_source_pubkey_bytes = bytes(data_source.stamp)
message_kit, _signature = data_source.encrypt_message(data)
kit_bytes = message_kit.to_bytes()
return EncryptedDataPackage(
alice_pubkey_bytes=channel.alice_pubkey_bytes,
data_source_pubkey_bytes=data_source_pubkey_bytes,
kit_bytes=kit_bytes,
label_bytes=label_bytes,
policy_pubkey_bytes=channel.policy_pubkey_bytes)
def generate_heart_rate_samples(policy_pubkey,
samples: int = 500,
save_as_file: bool = False):
data_source = Enrico(policy_encrypting_key=policy_pubkey)
data_source_public_key = bytes(data_source.stamp)
heart_rate = 80
now = time.time()
kits = list()
for _ in range(samples):
# Simulated heart rate data
# Normal resting heart rate for adults: between 60 to 100 BPM
heart_rate = random.randint(max(60, heart_rate - 5),
min(100, heart_rate + 5))
now += 3
heart_rate_data = {
'heart_rate': heart_rate,
'timestamp': now,
}
plaintext = msgpack.dumps(heart_rate_data, use_bin_type=True)
message_kit = data_source.encrypt_message(plaintext)
kit_bytes = bytes(message_kit)
kits.append(kit_bytes)
data = {
'data_source': data_source_public_key,
'kits': kits,
}
if save_as_file:
with open(HEART_DATA_FILENAME, "wb") as file:
msgpack.dump(data, file, use_bin_type=True)
return data
