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https://github.com/markqvist/Reticulum.git
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Expanded address space to 128 bits
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Mark Qvist
parent
2be1c7633d
commit
5faf13d505
@ -29,8 +29,7 @@ from RNS.Cryptography.AES import AES_128_CBC
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class Fernet():
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FERNET_VERSION = 0x80
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FERNET_OVERHEAD = 57 # In bytes
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OPTIMISED_FERNET_OVERHEAD = 54 # In bytes
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FERNET_OVERHEAD = 48 # In bytes
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@staticmethod
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def generate_key():
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@ -73,7 +72,7 @@ class Fernet():
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iv = iv,
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)
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signed_parts = b"\x80"+current_time.to_bytes(length=8, byteorder="big")+iv+ciphertext
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signed_parts = iv+ciphertext
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return signed_parts + HMAC.new(self._signing_key, signed_parts).digest()
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@ -85,8 +84,8 @@ class Fernet():
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if not self.verify_hmac(token):
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raise ValueError("Fernet token HMAC was invalid")
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iv = token[9:25]
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ciphertext = token[25:-32]
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iv = token[:16]
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ciphertext = token[16:-32]
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try:
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plaintext = PKCS7.unpad(
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@ -55,7 +55,6 @@ class Identity:
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# Non-configurable constants
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FERNET_VERSION = RNS.Cryptography.Fernet.FERNET_VERSION
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FERNET_OVERHEAD = RNS.Cryptography.Fernet.FERNET_OVERHEAD
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OPTIMISED_FERNET_OVERHEAD = RNS.Cryptography.Fernet.OPTIMISED_FERNET_OVERHEAD
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AES128_BLOCKSIZE = 16 # In bytes
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HASHLENGTH = 256 # In bits
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SIGLENGTH = KEYSIZE # In bits
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17
RNS/Link.py
17
RNS/Link.py
@ -59,7 +59,7 @@ class Link:
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ECPUBSIZE = 32+32
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KEYSIZE = 32
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MDU = math.floor((RNS.Reticulum.MTU-RNS.Reticulum.IFAC_MIN_SIZE-RNS.Reticulum.HEADER_MINSIZE-RNS.Identity.OPTIMISED_FERNET_OVERHEAD)/RNS.Identity.AES128_BLOCKSIZE)*RNS.Identity.AES128_BLOCKSIZE - 1
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MDU = math.floor((RNS.Reticulum.MTU-RNS.Reticulum.IFAC_MIN_SIZE-RNS.Reticulum.HEADER_MINSIZE-RNS.Identity.FERNET_OVERHEAD)/RNS.Identity.AES128_BLOCKSIZE)*RNS.Identity.AES128_BLOCKSIZE - 1
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ESTABLISHMENT_TIMEOUT_PER_HOP = RNS.Reticulum.DEFAULT_PER_HOP_TIMEOUT
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"""
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@ -788,16 +788,7 @@ class Link:
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RNS.log("Could not "+str(self)+" instantiate Fernet while performin encryption on link. The contained exception was: "+str(e), RNS.LOG_ERROR)
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raise e
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# The fernet token VERSION field is stripped here and
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# reinserted on the receiving end, since it is always
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# set to 0x80.
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#
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# Since we're also quite content with supporting time-
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# stamps until the year 8921556 AD, we'll also strip 2
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# bytes from the timestamp field and reinsert those as
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# 0x00 when received.
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ciphertext = self.fernet.encrypt(plaintext)[3:]
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return ciphertext
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return self.fernet.encrypt(plaintext)
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except Exception as e:
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RNS.log("Encryption on link "+str(self)+" failed. The contained exception was: "+str(e), RNS.LOG_ERROR)
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@ -809,8 +800,8 @@ class Link:
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if not self.fernet:
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self.fernet = Fernet(self.derived_key)
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plaintext = self.fernet.decrypt(bytes([RNS.Identity.FERNET_VERSION, 0x00, 0x00]) + ciphertext)
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return plaintext
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return self.fernet.decrypt(ciphertext)
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except Exception as e:
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RNS.log("Decryption failed on link "+str(self)+". The contained exception was: "+str(e), RNS.LOG_ERROR)
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@ -216,16 +216,18 @@ class Packet:
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self.destination_type = (self.flags & 0b00001100) >> 2
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self.packet_type = (self.flags & 0b00000011)
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DST_LEN = RNS.Reticulum.TRUNCATED_HASHLENGTH//8
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if self.header_type == Packet.HEADER_2:
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self.transport_id = self.raw[2:12]
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self.destination_hash = self.raw[12:22]
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self.context = ord(self.raw[22:23])
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self.data = self.raw[23:]
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self.transport_id = self.raw[2:DST_LEN+2]
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self.destination_hash = self.raw[DST_LEN+2:2*DST_LEN+2]
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self.context = ord(self.raw[2*DST_LEN+2:2*DST_LEN+3])
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self.data = self.raw[2*DST_LEN+3:]
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else:
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self.transport_id = None
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self.destination_hash = self.raw[2:12]
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self.context = ord(self.raw[12:13])
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self.data = self.raw[13:]
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self.destination_hash = self.raw[2:DST_LEN+2]
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self.context = ord(self.raw[DST_LEN+2:DST_LEN+3])
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self.data = self.raw[DST_LEN+3:]
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self.packed = False
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self.update_hash()
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@ -117,7 +117,7 @@ class Reticulum:
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DEFAULT_PER_HOP_TIMEOUT = 5
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# Length of truncated hashes in bits.
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TRUNCATED_HASHLENGTH = 80
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TRUNCATED_HASHLENGTH = 128
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HEADER_MINSIZE = 2+1+(TRUNCATED_HASHLENGTH//8)*1
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HEADER_MAXSIZE = 2+1+(TRUNCATED_HASHLENGTH//8)*2
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@ -212,7 +212,7 @@ def send(configdir, verbosity = 0, quietness = 0, destination = None, file = Non
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temp_file.write(real_file.read())
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temp_file.seek(0)
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print("\r \r", end="")
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print("\r \r", end="")
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reticulum = RNS.Reticulum(configdir=configdir, loglevel=targetloglevel)
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@ -240,10 +240,10 @@ def send(configdir, verbosity = 0, quietness = 0, destination = None, file = Non
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i = (i+1)%len(syms)
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if not RNS.Transport.has_path(destination_hash):
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print("\r \rPath not found")
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print("\r \rPath not found")
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exit(1)
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else:
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print("\r \rEstablishing link with "+RNS.prettyhexrep(destination_hash)+" ", end=" ")
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print("\r \rEstablishing link with "+RNS.prettyhexrep(destination_hash)+" ", end=" ")
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receiver_identity = RNS.Identity.recall(destination_hash)
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receiver_destination = RNS.Destination(
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@ -262,10 +262,10 @@ def send(configdir, verbosity = 0, quietness = 0, destination = None, file = Non
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i = (i+1)%len(syms)
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if not RNS.Transport.has_path(destination_hash):
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print("\r \rCould not establish link with "+RNS.prettyhexrep(destination_hash))
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print("\r \rCould not establish link with "+RNS.prettyhexrep(destination_hash))
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exit(1)
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else:
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print("\r \rAdvertising file resource ", end=" ")
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print("\r \rAdvertising file resource ", end=" ")
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link.identify(identity)
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resource = RNS.Resource(temp_file, link, callback = sender_progress, progress_callback = sender_progress)
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@ -279,10 +279,10 @@ def send(configdir, verbosity = 0, quietness = 0, destination = None, file = Non
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if resource.status > RNS.Resource.COMPLETE:
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print("\r \rFile was not accepted by "+RNS.prettyhexrep(destination_hash))
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print("\r \rFile was not accepted by "+RNS.prettyhexrep(destination_hash))
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exit(1)
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else:
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print("\r \rTransferring file ", end=" ")
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print("\r \rTransferring file ", end=" ")
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while not resource_done:
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time.sleep(0.1)
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@ -294,7 +294,7 @@ def send(configdir, verbosity = 0, quietness = 0, destination = None, file = Non
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i = (i+1)%len(syms)
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if current_resource.status != RNS.Resource.COMPLETE:
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print("\r \rThe transfer failed")
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print("\r \rThe transfer failed")
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exit(1)
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else:
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print("\r \r"+str(file_path)+" copied to "+RNS.prettyhexrep(destination_hash))
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@ -172,6 +172,15 @@ def prettysize(num, suffix='B'):
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return "%.2f%s%s" % (num, last_unit, suffix)
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def phyparams():
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print("Required Physical Layer MTU : "+str(Reticulum.MTU)+" bytes")
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print("Plaintext Packet MDU : "+str(Packet.PLAIN_MDU)+" bytes")
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print("Encrypted Packet MDU : "+str(Packet.ENCRYPTED_MDU)+" bytes")
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print("Link Curve : "+str(Link.CURVE))
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print("Link Packet MDU : "+str(Packet.ENCRYPTED_MDU)+" bytes")
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print("Link Public Key Size : "+str(Link.ECPUBSIZE*8)+" bits")
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print("Link Private Key Size : "+str(Link.KEYSIZE*8)+" bits")
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def panic():
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os._exit(255)
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