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Validate peering key on incoming sync offer

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This commit is contained in:
Mark Qvist 2025-10-31 17:02:34 +01:00
commit a44c1f368a
3 changed files with 42 additions and 18 deletions
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16
LXMF/LXStamper.py
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@ -8,8 +8,8 @@ import itertools
import multiprocessing
WORKBLOCK_EXPAND_ROUNDS = 3000
WORKBLOCK_EXPAND_ROUNDS_PEERING = 20000
WORKBLOCK_EXPAND_ROUNDS_PN = 1000
WORKBLOCK_EXPAND_ROUNDS_PEERING = 25
STAMP_SIZE = RNS.Identity.HASHLENGTH
PN_VALIDATION_POOL_MIN_SIZE = 256
@ -45,6 +45,11 @@ def stamp_valid(stamp, target_cost, workblock):
if int.from_bytes(result, byteorder="big") > target: return False
else: return True
def validate_peering_key(peering_id, peering_key, target_cost):
workblock = stamp_workblock(peering_id, expand_rounds=WORKBLOCK_EXPAND_ROUNDS_PEERING)
if not stamp_valid(peering_key, target_cost, workblock): return False
else: return True
def validate_pn_stamp(transient_data, target_cost):
from .LXMessage import LXMessage
if len(transient_data) <= LXMessage.LXMF_OVERHEAD+STAMP_SIZE: return False, None, None
@ -348,6 +353,13 @@ def job_android(stamp_cost, workblock, message_id):
return stamp, total_rounds
# def stamp_value_linear(workblock, stamp):
# value = 0
# bits = 256
# material = RNS.Identity.full_hash(workblock+stamp)
# s = int.from_bytes(material, byteorder="big")
# return s.bit_count()
if __name__ == "__main__":
import sys
if len(sys.argv) < 2:
@ -365,10 +377,12 @@ if __name__ == "__main__":
message_id = os.urandom(32)
generate_stamp(message_id, cost)
RNS.log("", RNS.LOG_DEBUG)
RNS.log("Testing propagation stamp generation", RNS.LOG_DEBUG)
message_id = os.urandom(32)
generate_stamp(message_id, cost, expand_rounds=WORKBLOCK_EXPAND_ROUNDS_PN)
RNS.log("", RNS.LOG_DEBUG)
RNS.log("Testing peering key generation", RNS.LOG_DEBUG)
message_id = os.urandom(32)
generate_stamp(message_id, cost, expand_rounds=WORKBLOCK_EXPAND_ROUNDS_PEERING)