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test: Check that disconnection happens when garbage sent/received are different

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This test type is represented using WRONG_GARBAGE.
Here, garbage bytes sent to TestNode are assumed to be tampered with and
do not correspond to the garbage bytes which P2PInterface calculated and
uses.
This commit is contained in:
stratospher 2024-02-13 20:57:17 +05:30
parent ad1482d5a2
commit b5e6238fdb
1 changed files with 14 additions and 0 deletions
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14
test/functional/p2p_v2_misbehaving.py
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@ -23,10 +23,12 @@ class TestType(Enum):
consisting of network magic followed by "version\x00\x00\x00\x00\x00" before sending out its ellswift + garbage bytes consisting of network magic followed by "version\x00\x00\x00\x00\x00" before sending out its ellswift + garbage bytes
2. EXCESS_GARBAGE - Disconnection happens when > MAX_GARBAGE_LEN bytes garbage is sent 2. EXCESS_GARBAGE - Disconnection happens when > MAX_GARBAGE_LEN bytes garbage is sent
3. WRONG_GARBAGE_TERMINATOR - Disconnection happens when incorrect garbage terminator is sent 3. WRONG_GARBAGE_TERMINATOR - Disconnection happens when incorrect garbage terminator is sent
4. WRONG_GARBAGE - Disconnection happens when garbage bytes that is sent is different from what the peer receives
""" """
EARLY_KEY_RESPONSE = 0 EARLY_KEY_RESPONSE = 0
EXCESS_GARBAGE = 1 EXCESS_GARBAGE = 1
WRONG_GARBAGE_TERMINATOR = 2 WRONG_GARBAGE_TERMINATOR = 2
WRONG_GARBAGE = 3
class EarlyKeyResponseState(EncryptedP2PState): class EarlyKeyResponseState(EncryptedP2PState):
@ -61,6 +63,15 @@ class WrongGarbageTerminatorState(EncryptedP2PState):
return length, wrong_garbage_terminator + handshake_bytes[16:] return length, wrong_garbage_terminator + handshake_bytes[16:]
class WrongGarbageState(EncryptedP2PState):
"""Generate tampered garbage bytes"""
def generate_keypair_and_garbage(self):
garbage_len = random.randrange(1, MAX_GARBAGE_LEN)
ellswift_garbage_bytes = super().generate_keypair_and_garbage(garbage_len)
# assume that garbage bytes sent to TestNode were tampered with
return ellswift_garbage_bytes[:64] + random_bitflip(ellswift_garbage_bytes[64:])
class MisbehavingV2Peer(P2PInterface): class MisbehavingV2Peer(P2PInterface):
"""Custom implementation of P2PInterface which uses modified v2 P2P protocol functions for testing purposes.""" """Custom implementation of P2PInterface which uses modified v2 P2P protocol functions for testing purposes."""
def __init__(self, test_type): def __init__(self, test_type):
@ -74,6 +85,8 @@ class MisbehavingV2Peer(P2PInterface):
self.v2_state = ExcessGarbageState(initiating=True, net='regtest') self.v2_state = ExcessGarbageState(initiating=True, net='regtest')
elif self.test_type == TestType.WRONG_GARBAGE_TERMINATOR: elif self.test_type == TestType.WRONG_GARBAGE_TERMINATOR:
self.v2_state = WrongGarbageTerminatorState(initiating=True, net='regtest') self.v2_state = WrongGarbageTerminatorState(initiating=True, net='regtest')
elif self.test_type == TestType.WRONG_GARBAGE:
self.v2_state = WrongGarbageState(initiating=True, net='regtest')
super().connection_made(transport) super().connection_made(transport)
def data_received(self, t): def data_received(self, t):
@ -116,6 +129,7 @@ class EncryptedP2PMisbehaving(BitcoinTestFramework):
[], # EARLY_KEY_RESPONSE [], # EARLY_KEY_RESPONSE
["V2 transport error: missing garbage terminator, peer=1"], # EXCESS_GARBAGE ["V2 transport error: missing garbage terminator, peer=1"], # EXCESS_GARBAGE
["V2 handshake timeout peer=2"], # WRONG_GARBAGE_TERMINATOR ["V2 handshake timeout peer=2"], # WRONG_GARBAGE_TERMINATOR
["V2 transport error: packet decryption failure"], # WRONG_GARBAGE
] ]
for test_type in TestType: for test_type in TestType:
if test_type == TestType.EARLY_KEY_RESPONSE: if test_type == TestType.EARLY_KEY_RESPONSE: