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Added plaintext link support

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This commit is contained in:
Mark Qvist 2018-04-16 22:04:28 +02:00
parent 75e0cb039d
commit 8772db6736
3 changed files with 46 additions and 3 deletions
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17
RNS/Link.py
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@ -41,7 +41,6 @@ class Link:
except Exception as e:
RNS.log("Validating link request failed", RNS.LOG_VERBOSE)
return None
else:
RNS.log("Invalid link request payload size, dropping request", RNS.LOG_VERBOSE)
@ -49,12 +48,15 @@ class Link:
def __init__(self, destination=None, owner=None, peer_pub_bytes = None):
if destination != None and destination.type != RNS.Destination.SINGLE:
raise TypeError("Links can only be established to the \"single\" destination type")
self.callbacks = LinkCallbacks()
self.status = Link.PENDING
self.type = RNS.Destination.LINK
self.owner = owner
self.destination = destination
self.attached_interface = None
self.__encryption_disabled = False
if self.destination == None:
self.initiator = False
else:
@ -142,6 +144,8 @@ class Link:
self.callbacks.packet(plaintext, packet)
def encrypt(self, plaintext):
if self.__encryption_disabled:
return plaintext
try:
fernet = Fernet(base64.urlsafe_b64encode(self.derived_key))
ciphertext = base64.urlsafe_b64decode(fernet.encrypt(plaintext))
@ -151,6 +155,8 @@ class Link:
def decrypt(self, ciphertext):
if self.__encryption_disabled:
return ciphertext
try:
fernet = Fernet(base64.urlsafe_b64encode(self.derived_key))
plaintext = fernet.decrypt(base64.urlsafe_b64encode(ciphertext))
@ -170,5 +176,14 @@ class Link:
def resource_completed_callback(self, callback):
self.callbacks.resource_completed = callback
def disableEncryption(self):
if (RNS.Reticulum.should_allow_unencrypted()):
RNS.log("The link "+str(self)+" was downgraded to an encryptionless link", RNS.LOG_NOTICE)
self.__encryption_disabled = True
else:
RNS.log("Attempt to disable encryption on link, but encryptionless links are not allowed by config.", RNS.LOG_CRITICAL)
RNS.log("Shutting down Reticulum now!", RNS.LOG_CRITICAL)
RNS.panic()
def __str__(self):
return RNS.prettyhexrep(self.link_id)