kopia lustrzana https://github.com/markqvist/reticulum
Truncate name_hash to 80 bits. Take all array slices from Identity.NAME_HASH_LENGTH constant.
Mark Qvist
rodzic
0b98a9bff4
commit
cb55189e5c
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@ -94,7 +94,7 @@ class Destination:
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"""
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:returns: A destination name in adressable hash form, for an app_name and a number of aspects.
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"""
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name_hash = RNS.Identity.full_hash(Destination.expand_name(None, app_name, *aspects).encode("utf-8"))
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name_hash = RNS.Identity.full_hash(Destination.expand_name(None, app_name, *aspects).encode("utf-8"))[:(RNS.Identity.NAME_HASH_LENGTH//8)]
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addr_hash_material = name_hash
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if identity != None:
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addr_hash_material += identity.hash
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@ -146,7 +146,7 @@ class Destination:
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# Generate the destination address hash
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self.hash = Destination.hash(self.identity, app_name, *aspects)
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self.name_hash = RNS.Identity.full_hash(self.expand_name(None, app_name, *aspects).encode("utf-8"))
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self.name_hash = RNS.Identity.full_hash(self.expand_name(None, app_name, *aspects).encode("utf-8"))[:(RNS.Identity.NAME_HASH_LENGTH//8)]
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self.hexhash = self.hash.hex()
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self.default_app_data = None
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@ -185,8 +185,6 @@ class Destination:
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if isinstance(returned_app_data, bytes):
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app_data = returned_app_data
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# TODO: It is probably possible truncate the name_hash to 16 bytes to
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# save bandwidth without any practical impact on collision resistance
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signed_data = self.hash+self.identity.get_public_key()+self.name_hash+random_hash
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if app_data != None:
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signed_data += app_data
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@ -58,6 +58,7 @@ class Identity:
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HASHLENGTH = 256 # In bits
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SIGLENGTH = KEYSIZE # In bits
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NAME_HASH_LENGTH = 80
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TRUNCATED_HASHLENGTH = RNS.Reticulum.TRUNCATED_HASHLENGTH
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"""
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Constant specifying the truncated hash length (in bits) used by Reticulum
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@ -214,16 +215,16 @@ class Identity:
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if packet.packet_type == RNS.Packet.ANNOUNCE:
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destination_hash = packet.destination_hash
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public_key = packet.data[:Identity.KEYSIZE//8]
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name_hash = packet.data[Identity.KEYSIZE//8:Identity.KEYSIZE//8+Identity.HASHLENGTH//8]
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random_hash = packet.data[Identity.KEYSIZE//8+Identity.HASHLENGTH//8:Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10]
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signature = packet.data[Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10:Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10+Identity.SIGLENGTH//8]
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name_hash = packet.data[Identity.KEYSIZE//8:Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8]
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random_hash = packet.data[Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8:Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10]
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signature = packet.data[Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10:Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10+Identity.SIGLENGTH//8]
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app_data = b""
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if len(packet.data) > Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10+Identity.SIGLENGTH//8:
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app_data = packet.data[Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10+Identity.SIGLENGTH//8:]
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if len(packet.data) > Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10+Identity.SIGLENGTH//8:
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app_data = packet.data[Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10+Identity.SIGLENGTH//8:]
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signed_data = destination_hash+public_key+name_hash+random_hash+app_data
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if not len(packet.data) > Identity.KEYSIZE//8+Identity.HASHLENGTH//8+10+Identity.SIGLENGTH//8:
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if not len(packet.data) > Identity.KEYSIZE//8+Identity.NAME_HASH_LENGTH//8+10+Identity.SIGLENGTH//8:
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app_data = None
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announced_identity = Identity(create_keys=False)
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@ -1084,7 +1084,7 @@ class Transport:
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if (not any(packet.destination_hash == d.hash for d in Transport.destinations) and packet.hops < Transport.PATHFINDER_M+1):
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announce_emitted = Transport.announce_emitted(packet)
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random_blob = packet.data[RNS.Identity.KEYSIZE//8+RNS.Identity.HASHLENGTH//8:RNS.Identity.KEYSIZE//8+RNS.Identity.HASHLENGTH//8+10]
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random_blob = packet.data[RNS.Identity.KEYSIZE//8+RNS.Identity.NAME_HASH_LENGTH//8:RNS.Identity.KEYSIZE//8+RNS.Identity.NAME_HASH_LENGTH//8+10]
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random_blobs = []
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if packet.destination_hash in Transport.destination_table:
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random_blobs = Transport.destination_table[packet.destination_hash][4]
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@ -2054,7 +2054,7 @@ class Transport:
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@staticmethod
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def announce_emitted(packet):
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random_blob = packet.data[RNS.Identity.KEYSIZE//8+RNS.Identity.HASHLENGTH//8:RNS.Identity.KEYSIZE//8+RNS.Identity.HASHLENGTH//8+10]
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random_blob = packet.data[RNS.Identity.KEYSIZE//8+RNS.Identity.NAME_HASH_LENGTH//8:RNS.Identity.KEYSIZE//8+RNS.Identity.NAME_HASH_LENGTH//8+10]
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announce_emitted = int.from_bytes(random_blob[5:10], "big")
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return announce_emitted
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@ -89,7 +89,7 @@ class TestLink(unittest.TestCase):
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -109,7 +109,7 @@ class TestLink(unittest.TestCase):
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -176,7 +176,7 @@ class TestLink(unittest.TestCase):
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -211,7 +211,7 @@ class TestLink(unittest.TestCase):
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -245,7 +245,7 @@ class TestLink(unittest.TestCase):
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self.assertEqual(id1.hash, bytes.fromhex(fixed_keys[0][1]))
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -284,7 +284,7 @@ class TestLink(unittest.TestCase):
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self.assertEqual(id1.hash, bytes.fromhex(fixed_keys[0][1]))
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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@ -322,7 +322,7 @@ class TestLink(unittest.TestCase):
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self.assertEqual(id1.hash, bytes.fromhex(fixed_keys[0][1]))
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dest = RNS.Destination(id1, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, "link", "establish")
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self.assertEqual(dest.hash, bytes.fromhex("46238cb662b2fc7342de77d7c84abb5c"))
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self.assertEqual(dest.hash, bytes.fromhex("fb48da0e82e6e01ba0c014513f74540d"))
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l1 = RNS.Link(dest)
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time.sleep(0.5)
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