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Migrated all asymmetric crypto operations to ECIES on Curve25519.

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This commit is contained in:
Mark Qvist 2021-05-20 15:31:38 +02:00
parent 7f5625a526
commit ce405b9252
10 changed files with 231 additions and 185 deletions
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37
RNS/Packet.py
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@ -6,8 +6,16 @@ import RNS
class Packet:
"""
The Packet class is used to create packet instances that can be
sent over a Reticulum network.
The Packet class is used to create packet instances that can be sent
over a Reticulum network. Packets to will automatically be encrypted if
they are adressed to a ``RNS.Destination.SINGLE`` destination,
``RNS.Destination.GROUP`` destination or a :ref:`RNS.Link<api-link>`.
For ``RNS.Destination.GROUP`` destinations, Reticulum will use the
pre-shared key configured for the destination.
For ``RNS.Destination.SINGLE`` destinations and :ref:`RNS.Link<api-link>`
destinations, reticulum will use ephemeral keys, and offers **Forward Secrecy**.
:param destination: A :ref:`RNS.Destination<api-destination>` instance to which the packet will be sent.
:param data: The data payload to be included in the packet as *bytes*.
@ -56,14 +64,21 @@ class Packet:
# This is used to calculate allowable
# payload sizes
HEADER_MAXSIZE = 23
HEADER_MAXSIZE = RNS.Reticulum.HEADER_MAXSIZE
MDU = RNS.Reticulum.MDU
# With an MTU of 500, the maximum RSA-encrypted
# amount of data we can send in a single packet
# is given by the below calculation; 258 bytes.
RSA_MDU = math.floor(MDU/RNS.Identity.DECRYPT_CHUNKSIZE)*RNS.Identity.ENCRYPT_CHUNKSIZE
PLAIN_MDU = MDU
# TODO: Update this
# With an MTU of 500, the maximum of data we can
# send in a single encrypted packet is given by
# the below calculation; 383 bytes.
ENCRYPTED_MDU = math.floor((RNS.Reticulum.MDU-RNS.Identity.AES_HMAC_OVERHEAD-RNS.Identity.KEYSIZE//16)/RNS.Identity.AES128_BLOCKSIZE)*RNS.Identity.AES128_BLOCKSIZE - 1
"""
The maximum size of the payload data in a single encrypted packet
"""
PLAIN_MDU = MDU
"""
The maximum size of the payload data in a single unencrypted packet
"""
# TODO: This should be calculated
# more intelligently
@ -406,7 +421,7 @@ class PacketReceipt:
else:
return False
def rtt(self):
def get_rtt(self):
"""
:returns: The round-trip-time in seconds
"""
@ -439,7 +454,7 @@ class PacketReceipt:
"""
self.timeout = float(timeout)
def delivery_callback(self, callback):
def set_delivery_callback(self, callback):
"""
Sets a function that gets called if a successfull delivery has been proven.
@ -449,7 +464,7 @@ class PacketReceipt:
# Set a function that gets called if the
# delivery times out
def timeout_callback(self, callback):
def set_timeout_callback(self, callback):
"""
Sets a function that gets called if the delivery times out.