Work on bundles

RNS/Bundle.py

@@ -1,7 +1,117 @@
 import RNS
+import time
+import os
+import os.path
+from .vendor import umsgpack as umsgpack
 
 class Bundle:
-	pass
+	NO_CUSTODY     = 0x00;
+	TAKING_CUSTODY = 0x01;
+	FULL_CUSTODY   = 0x02;
+
+	CHUNK_SIZE     = RNS.Resource.MAX_EFFICIENT_SIZE / 4
+
+	def __init__(self, destination = None, data = None, filepath = None, advertised_id = None):
+		self.destination  = destination
+		self.state        = None
+		self.data_file    = None
+		self.meta_file    = None
+		self.id           = None
+		self.storagepath  = None
+		self.size         = None
+		self.chunks       = 0
+		self.heartbeat    = time.time()
+		self.resources    = []
+
+		try:
+			if data != None or filepath != None:
+
+				if filepath == None and data != None:
+					try:
+						self.id = RNS.Identity.fullHash(data)
+						self.storagepath  = Reticulum.bundlepath+"/"+self.id.hex()
+						self.datapath     = self.storagepath+"/data"
+						self.metadatapath = self.storagepath+"/metadata"
+
+						if not os.path.isdir(self.storagepath):
+							os.makedirs(self.storagepath)
+						else:
+							RNS.log("Warning, bundle already exists in storage location, recreating", RNS.LOG_DEBUG)
+
+						self.data_file = open(self.datapath, "wb")
+						self.data_file.write(data)
+						self.data_file.close()
+					except Exception as e:
+						RNS.log("Error while initialising bundle from data, the contained exception was:", RNS.LOG_ERROR)
+						RNS.log(str(e))
+
+					self.state = Bundle.FULL_CUSTODY
+
+				elif data == None and filepath != None:
+					try:
+						input_file = open(filepath, "rb")
+						self.id = RNS.Identity.fullHash(input_file.read())
+						input_file.seek(0)
+
+						self.storagepath  = RNS.Reticulum.bundlepath+"/"+self.id.hex()
+						self.datapath     = self.storagepath+"/data"
+						self.metadatapath = self.storagepath+"/metadata"
+
+						if not os.path.isdir(self.storagepath):
+							os.makedirs(self.storagepath)
+						else:
+							RNS.log("Warning, bundle already exists in storage location, recreating", RNS.LOG_DEBUG)
+
+						self.data_file = open(self.datapath, "wb")
+						self.data_file.write(input_file.read())
+						self.data_file.close()
+						input_file.close()
+
+					except Exception as e:
+						RNS.log("Error while reading input file for bundle, the contained exception was:", RNS.LOG_ERROR)
+						RNS.log(str(e))
+
+					self.state = Bundle.FULL_CUSTODY
+
+				else:
+					raise ValueError("Bundle cannot be created from data and file path at the same time")
+
+			elif advertised_id != None:
+				# Incoming bundle transfer
+				self.state = Bundle.TAKING_CUSTODY
+			else:
+				raise ValueError("No source of data specified for bundle initialisation")
+
+			# Prepare file handles and metadata
+			self.size = os.stat(self.datapath).st_size
+			if self.size < 1:
+				raise IOError("Bundle data is empty")
+
+			self.chunks = ((self.size-1)//Bundle.CHUNK_SIZE)+1
+			self.data_file = open(self.datapath, "rb")
+			self.flush_metadata()
+
+		except Exception as e:
+			RNS.log("Error while initialising bundle. The contained exception was:", RNS.LOG_ERROR)
+			RNS.log(str(e), RNS.LOG_ERROR)
+			raise e
+
+	def flush_metadata(self):
+		try:
+			metadata = {
+				"destination": self.destination,
+				"heartbeat": self.heartbeat,
+				"size": self.size,
+				"chunks": self.chunks,
+				"state": self.state}
+
+			self.meta_file = open(self.metadatapath, "wb")
+			self.meta_file.write(umsgpack.packb(metadata))
+			self.meta_file.close()
+
+		except Exception as e:
+			RNS.log("Error while flushing metadata for bundle "+RNS.prettyhexrep(self.id), RNS.LOG_ERROR)
+			RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
 
 class BundleAdvertisement:
 	pass

RNS/Identity.py

@@ -79,10 +79,11 @@ class Identity:
 
 	@staticmethod
 	def truncatedHash(data):
-		digest = hashes.Hash(hashes.SHA256(), backend=default_backend())
-		digest.update(data)
+		# TODO: Remove
+		# digest = hashes.Hash(hashes.SHA256(), backend=default_backend())
+		# digest.update(data)
 
-		return digest.finalize()[:(Identity.TRUNCATED_HASHLENGTH//8)]
+		return Identity.fullHash(data)[:(Identity.TRUNCATED_HASHLENGTH//8)]
 
 	@staticmethod
 	def getRandomHash():

RNS/Reticulum.py

@@ -9,8 +9,6 @@ import os.path
 import os
 import RNS
 
-#import traceback
-
 class Reticulum:
 	MTU            = 500
 	HEADER_MAXSIZE = 23
@@ -36,6 +34,7 @@ class Reticulum:
 		Reticulum.configpath  = Reticulum.configdir+"/config"
 		Reticulum.storagepath = Reticulum.configdir+"/storage"
 		Reticulum.cachepath   = Reticulum.configdir+"/storage/cache"
+		Reticulum.bundlepath  = Reticulum.configdir+"/storage/bundles"
 
 		Reticulum.__allow_unencrypted = False
 		Reticulum.__transport_enabled = False
@@ -54,6 +53,9 @@ class Reticulum:
 		if not os.path.isdir(Reticulum.cachepath):
 			os.makedirs(Reticulum.cachepath)
 
+		if not os.path.isdir(Reticulum.bundlepath):
+			os.makedirs(Reticulum.bundlepath)
+
 		if os.path.isfile(self.configpath):
 			try:
 				self.config = ConfigObj(self.configpath)