def verify_multiple(
pubkeys: Sequence[BLSPubkey],
message_hashes: Sequence[Hash32],
signature: BLSSignature,
domain: Domain,
) -> bool:
len_msgs = len(message_hashes)
len_pubkeys = len(pubkeys)
if len_pubkeys != len_msgs:
raise ValueError(
"len(pubkeys) (%s) should be equal to len(message_hashes) (%s)" %
(len_pubkeys, len_msgs))
message_hashes_with_domain = [
combine_domain(message_hash, domain) for message_hash in message_hashes
]
pubkeys_chia = map(_pubkey_from_bytes, pubkeys)
aggregate_infos = [
AggregationInfo.from_msg(pubkey_chia, message_hash) for pubkey_chia,
message_hash in zip(pubkeys_chia, message_hashes_with_domain)
]
merged_info = AggregationInfo.merge_infos(aggregate_infos)
signature_chia = _signature_from_bytes(signature)
signature_chia.set_aggregation_info(merged_info)
return cast(bool, signature_chia.verify())
def reply_commit(blockchain, logger, values):
logger.debug("in reply_commit fxn")
signature = values.get('tc_signed')
node_address = values.get('address')
if signature is None or node_address is None:
return jsonify("Error: invalid json received, Bad request"), 400
if node_address not in blockchain.public_key_list:
return jsonify("Bad request"), 400
signature = BLS.deserialize(signature, Signature)
hash_of_priority_block = blockchain.proposed_block.get_hash()
temp_array = []
for c in hash_of_priority_block:
temp_array.append(ord(c))
msg = bytes(temp_array)
signature.set_aggregation_info(
AggregationInfo.from_msg(
PublicKey.from_bytes(
bytes(blockchain.public_key_list[node_address],
"ISO-8859-1")), msg))
verify_sign = signature.verify()
if verify_sign:
logger.debug("reply commit signature verified")
blockchain.commit_accepted[node_address] = signature
# print("commit accepted by ", len(blockchain.commit_accepted))
return jsonify("True"), 200
else:
logger.warning("reply commit signature tempered")
return jsonify("False"), 300
def verify(message_hash: Hash32, pubkey: BLSPubkey, signature: BLSSignature,
domain: Domain) -> bool:
pubkey_chia = _pubkey_from_bytes(pubkey)
signature_chia = _signature_from_bytes(signature)
signature_chia.set_aggregation_info(
AggregationInfo.from_msg(pubkey_chia,
combine_domain(message_hash, domain)))
return cast(bool, signature_chia.verify())
def verify_sign(_data, _signature, public_key_list):
if type(_signature) != Signature:
_signature = BLS.deserialize(_signature, Signature)
if type(_signature) != Signature:
return None
if type(_data) != str:
return None
temp_array = []
for c in _data:
temp_array.append(ord(c))
msg = bytes(temp_array)
agg_info_list = []
if type(public_key_list) == list:
for pk in public_key_list:
if type(pk) == PublicKey:
agg_info = AggregationInfo.from_msg(pk, msg)
agg_info_list.append(agg_info)
else:
pk = BLS.deserialize(pk, PublicKey)
if type(pk) == PublicKey:
agg_info = AggregationInfo.from_msg(pk, msg)
agg_info_list.append(agg_info)
else:
return None
else:
if type(public_key_list) == PrivateKey:
agg_info = AggregationInfo.from_msg(public_key_list, msg)
agg_info_list.append(agg_info)
else:
public_key_list = BLS.deserialize(public_key_list, PublicKey)
if type(public_key_list) == PublicKey:
agg_info = AggregationInfo.from_msg(public_key_list, msg)
agg_info_list.append(agg_info)
else:
return None
agg_public_key = AggregationInfo.merge_infos(agg_info_list)
_signature.set_aggregation_info(agg_public_key)
return _signature.verify()
def test2():
seed = bytes([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
seed2 = bytes([1, 20, 102, 229, 1, 157])
sk = BLSPrivateKey.from_seed(seed)
sk_cp = BLSPrivateKey.from_seed(seed)
sk2 = BLSPrivateKey.from_seed(seed2)
pk = sk.get_public_key()
pk2 = sk2.get_public_key()
assert (sk == sk_cp)
assert (sk != sk2)
assert (pk.get_fingerprint() == 0xddad59bb)
print(sk, sk2)
print(pk, pk2)
pk2_ser = pk2.serialize()
print(pk2_ser)
pk2_copy = BLSPublicKey.from_bytes(pk2_ser)
assert (pk2 == pk2_copy)
assert (pk != pk2)
assert (pk2.size() == 48)
assert (sk2.size() == 32)
message = bytes("this is the message", "utf-8")
sig = sk.sign(message)
sig_ser = sig.serialize()
print("Sig ser is", sig_ser)
sig_cp = BLSSignature.from_bytes(sig_ser)
a1 = AggregationInfo.from_msg(pk, message)
sig_cp.set_aggregation_info(a1)
a2 = sig_cp.get_aggregation_info()
assert (a1 == a2)
print(a2)
sig2 = sk2.sign(message)
assert (sig.size() == 96)
print(sig, sig2)
print(sig2.serialize())
print(sorted([sig, sig2]))
assert (sig != sig2)
assert (sig == sig_cp)
sig_agg = BLS.aggregate_sigs([sig, sig2])
result = BLS.verify(sig_cp)
result2 = BLS.verify(sig2)
result3 = BLS.verify(sig_agg)
assert (result)
assert (result2)
assert (result3)
sk2 = sk
print(sk)
def verified_commit(blockchain, logger, values):
block_hash = values.get('block')
if block_hash is None:
return jsonify("tempered Data"), 401
block = blockchain.commit_verified_list.get(block_hash)
if block is None:
return jsonify("verification block missing"), 402
signers = values.get('n_list')
co_sig = values.get('co_sig')
if (signers is None) or (co_sig is None):
return jsonify("tempered block data"), 403
co_sig = BLS.deserialize(co_sig, Signature)
flag = block.verify_block(blockchain)
if not flag:
return jsonify("invalid block!"), 301
node_address = block.harvester
block_hash_hexdigest = block.get_hash()
if node_address in blockchain.public_key_list:
if len(signers) / len(blockchain.public_key_list) > 0.66:
temp_array = []
for c in block_hash_hexdigest:
temp_array.append(ord(c))
msg = bytes(temp_array)
agg_info_list = []
for node in signers:
if node in blockchain.public_key_list:
agg_info = AggregationInfo.from_msg(
PublicKey.from_bytes(
bytes(blockchain.public_key_list[node],
"ISO-8859-1")), msg)
agg_info_list.append(agg_info)
else:
return jsonify("BlockChain couldn't updated "), 302
agg_public_key = AggregationInfo.merge_infos(agg_info_list)
co_sig.set_aggregation_info(agg_public_key)
verify_signature = co_sig.verify()
if verify_signature:
logger.debug("hey you verified commit block" +
block.get_hash())
block.signers = signers
block.signature = values.get('co_sig')
blockchain.update_blockchain(block)
return jsonify("BlockChain should be updated "), 200
else:
return jsonify("BlockChain couldn't updated "), 303
else:
logger.warning("you didn't get majority")
return jsonify("BlockChain couldn't updated "), 304
logger.debug("node address didn't exists")
return jsonify("BlockChain couldn't updated "), 305
def verify_sig(msg, _pub_key, _sig):
try:
sig = Signature.from_bytes(_sig)
except RuntimeError:
raise ValueError("Bad signature")
try:
pub_key = PublicKey.from_bytes(_pub_key)
except RuntimeError:
raise ValueError("Bad public key")
sig.set_aggregation_info(AggregationInfo.from_msg(pub_key, msg))
ok = sig.verify()
return ok
def verify_signature(self):
temp_array = []
msg = self.sender + self.to + str(self.amount) + str(self.timestamp)
for c in msg:
temp_array.append(ord(c))
msg = bytes(temp_array)
_signature = bytes(self.signature, "ISO-8859-1")
_signature = Signature.from_bytes(_signature)
public_key = PublicKey.from_bytes(bytes(self.sender, "ISO-8859-1"))
_signature.set_aggregation_info(
AggregationInfo.from_msg(public_key, msg))
return _signature.verify()
def verify(self):
aggregation_infos = []
sig = self.signature
in_value = 0
for input in self.inputs:
if input.verify() == False:
return false
aggregation_infos.append(AggregationInfo.from_msg(input.prevout.spendingkey.pk, input.hash()))
in_value = in_value + input.prevout.value
out_value = 0
for output in self.outputs:
if output.verify() == False:
return false
aggregation_infos.append(AggregationInfo.from_msg(output.blindingkey.pk, output.hash()))
out_value = out_value + output.value
sig.set_aggregation_info(AggregationInfo.merge_infos(aggregation_infos))
return sig.verify() and in_value >= out_value
def test_vectors():
sk1 = PrivateKey.from_seed(bytes([1, 2, 3, 4, 5]))
pk1 = sk1.get_public_key()
sig1 = sk1.sign(bytes([7, 8, 9]))
sk2 = PrivateKey.from_seed(bytes([1, 2, 3, 4, 5, 6]))
pk2 = sk2.get_public_key()
sig2 = sk2.sign(bytes([7, 8, 9]))
assert (sk1.serialize() == bytes.fromhex(
"022fb42c08c12de3a6af053880199806532e79515f94e83461612101f9412f9e"))
assert (pk1.get_fingerprint() == 0x26d53247)
assert (pk2.get_fingerprint() == 0x289bb56e)
assert (sig1.serialize() == bytes.fromhex(
"93eb2e1cb5efcfb31f2c08b235e8203a67265bc6a13d9f0ab77727293b74a357ff0459ac210dc851fcb8a60cb7d393a419915cfcf83908ddbeac32039aaa3e8fea82efcb3ba4f740f20c76df5e97109b57370ae32d9b70d256a98942e5806065"
))
assert (sig2.serialize() == bytes.fromhex(
"975b5daa64b915be19b5ac6d47bc1c2fc832d2fb8ca3e95c4805d8216f95cf2bdbb36cc23645f52040e381550727db420b523b57d494959e0e8c0c6060c46cf173872897f14d43b2ac2aec52fc7b46c02c5699ff7a10beba24d3ced4e89c821e"
))
agg_sig = Signature.aggregate([sig1, sig2])
agg_pk = PublicKey.aggregate([pk1, pk2])
agg_sk = PrivateKey.aggregate([sk1, sk2], [pk1, pk2])
assert (agg_sig.serialize() == bytes.fromhex(
"0a638495c1403b25be391ed44c0ab013390026b5892c796a85ede46310ff7d0e0671f86ebe0e8f56bee80f28eb6d999c0a418c5fc52debac8fc338784cd32b76338d629dc2b4045a5833a357809795ef55ee3e9bee532edfc1d9c443bf5bc658"
))
assert (agg_sk.sign(bytes([7, 8, 9])).serialize() == agg_sig.serialize())
assert (sig1.verify())
assert (agg_sig.verify())
agg_sig.set_aggregation_info(
AggregationInfo.from_msg(agg_pk, bytes([7, 8, 9])))
assert (agg_sig.verify())
sig1.set_aggregation_info(sig2.get_aggregation_info())
assert (not sig1.verify())
sig3 = sk1.sign(bytes([1, 2, 3]))
sig4 = sk1.sign(bytes([1, 2, 3, 4]))
sig5 = sk2.sign(bytes([1, 2]))
agg_sig2 = Signature.aggregate([sig3, sig4, sig5])
assert (agg_sig2.verify())
assert (agg_sig2.serialize() == bytes.fromhex(
"8b11daf73cd05f2fe27809b74a7b4c65b1bb79cc1066bdf839d96b97e073c1a635d2ec048e0801b4a208118fdbbb63a516bab8755cc8d850862eeaa099540cd83621ff9db97b4ada857ef54c50715486217bd2ecb4517e05ab49380c041e159b"
))
def verify_block_signature(self, blockchain):
if type(self.txn) == list:
txn_hash = self.txn
txn_hash.sort()
elif type(self.txn) == dict:
txn_hash = list(self.txn.keys())
txn_hash.sort()
else:
return False
msg = dumps({
"index": self.index,
"harvester": self.harvester,
"previous_hash": self.previous_hash,
"txn": txn_hash,
"signature": "",
"signers": "",
"timestamp": self.timestamp,
})
temp_array = []
for c in msg:
temp_array.append(ord(c))
msg = bytes(temp_array)
if type(self.signature) == Signature:
pass
else:
self.signature = BLS.deserialize(self.signature, Signature)
agg_info_list = []
for node in self.signers:
if node in blockchain.public_key_list:
agg_info = AggregationInfo.from_msg(
PublicKey.from_bytes(
bytes(blockchain.public_key_list[node], "ISO-8859-1")),
msg)
agg_info_list.append(agg_info)
else:
return False
agg_public_key = AggregationInfo.merge_infos(agg_info_list)
self.signature.set_aggregation_info(agg_public_key)
return self.signature.verify()
def verify_offline_block_signature(self, blockchain):
if type(self.txn) == list:
txn_hash = self.txn
txn_hash.sort()
elif type(self.txn) == dict:
txn_hash = list(self.txn.keys())
txn_hash.sort()
else:
return False
block = copy(self)
block.signature = ""
block.signers = ""
block.txn = txn_hash
msg = block.get_hash()
temp_array = []
for c in msg:
temp_array.append(ord(c))
msg = bytes(temp_array)
if type(self.signature) == Signature:
pass
else:
self.signature = BLS.deserialize(self.signature, Signature)
agg_info_list = []
for node in self.signers:
if node in blockchain.public_key_list:
agg_info = AggregationInfo.from_msg(
PublicKey.from_bytes(
bytes(blockchain.public_key_list[node], "ISO-8859-1")),
msg)
agg_info_list.append(agg_info)
else:
return False
agg_public_key = AggregationInfo.merge_infos(agg_info_list)
self.signature.set_aggregation_info(agg_public_key)
return self.signature.verify()
def test1():
seed = bytes([
0, 50, 6, 244, 24, 199, 1, 25, 52, 88, 192, 19, 18, 12, 89, 6, 220, 18,
102, 58, 209, 82, 12, 62, 89, 110, 182, 9, 44, 20, 254, 22
])
sk = PrivateKey.from_seed(seed)
pk = sk.get_public_key()
msg = bytes([100, 2, 254, 88, 90, 45, 23])
sig = sk.sign(msg)
sk_bytes = sk.serialize()
pk_bytes = pk.serialize()
sig_bytes = sig.serialize()
sk = PrivateKey.from_bytes(sk_bytes)
pk = PublicKey.from_bytes(pk_bytes)
sig = Signature.from_bytes(sig_bytes)
sig.set_aggregation_info(AggregationInfo.from_msg(pk, msg))
ok = sig.verify()
assert (ok)
seed = bytes([1]) + seed[1:]
sk1 = PrivateKey.from_seed(seed)
seed = bytes([2]) + seed[1:]
sk2 = PrivateKey.from_seed(seed)
pk1 = sk1.get_public_key()
sig1 = sk1.sign(msg)
pk2 = sk2.get_public_key()
sig2 = sk2.sign(msg)
agg_sig = Signature.aggregate([sig1, sig2])
agg_pubkey = PublicKey.aggregate([pk1, pk2])
agg_sig.set_aggregation_info(AggregationInfo.from_msg(agg_pubkey, msg))
assert (agg_sig.verify())
seed = bytes([3]) + seed[1:]
sk3 = PrivateKey.from_seed(seed)
pk3 = sk3.get_public_key()
msg2 = bytes([100, 2, 254, 88, 90, 45, 23])
sig1 = sk1.sign(msg)
sig2 = sk2.sign(msg)
sig3 = sk3.sign(msg2)
agg_sig_l = Signature.aggregate([sig1, sig2])
agg_sig_final = Signature.aggregate([agg_sig_l, sig3])
sig_bytes = agg_sig_final.serialize()
agg_sig_final = Signature.from_bytes(sig_bytes)
a1 = AggregationInfo.from_msg(pk1, msg)
a2 = AggregationInfo.from_msg(pk2, msg)
a3 = AggregationInfo.from_msg(pk3, msg2)
a1a2 = AggregationInfo.merge_infos([a1, a2])
a_final = AggregationInfo.merge_infos([a1a2, a3])
print(a_final)
agg_sig_final.set_aggregation_info(a_final)
ok = agg_sig_final.verify()
ok = agg_sig_l.verify()
agg_sig_final = agg_sig_final.divide_by([agg_sig_l])
ok = agg_sig_final.verify()
agg_sk = PrivateKey.aggregate([sk1, sk2], [pk1, pk2])
agg_sk.sign(msg)
seed = bytes([
1, 50, 6, 244, 24, 199, 1, 25, 52, 88, 192, 19, 18, 12, 89, 6, 220, 18,
102, 58, 209, 82, 12, 62, 89, 110, 182, 9, 44, 20, 254, 22
])
esk = ExtendedPrivateKey.from_seed(seed)
epk = esk.get_extended_public_key()
sk_child = esk.private_child(0).private_child(5)
pk_child = epk.public_child(0).public_child(5)
buffer1 = pk_child.serialize()
buffer2 = sk_child.serialize()
print(len(buffer1), buffer1)
print(len(buffer2), buffer2)
assert (sk_child.get_extended_public_key() == pk_child)
#The Fog Node receives the data packets and the aggregated signature from the IoT device
#The public key of the IoT device is known publicly by the entire system
import timeit
import pickle
from blspy import (PrivateKey, PublicKey, InsecureSignature, Signature,
PrependSignature, AggregationInfo, ExtendedPrivateKey,
Threshold, Util)
num = 3
a=[0]*num
# Create aggregation information (or deserialize it)
dt3 = timeit.default_timer()
for x in range(num):
a[x] = AggregationInfo.from_msg(pk[x], msg[x])
for i in range(0,num-1,2):
a1a2 = AggregationInfo.merge_infos([a[i], a[i+1]])
a_final = AggregationInfo.merge_infos([a1a2, a[i+2]])
a[i+2]=a_final
agg_sig_final.set_aggregation_info(a_final)
ok = agg_sig_final.verify()
dt4 = timeit.default_timer()
print ("Signature Verification Time:",(dt4-dt3)*1000,"ms")
def verify(self):
msg = self.hash()
sig = self.signature
sig.set_aggregation_info(AggregationInfo.from_msg(self.blindingkey.pk, msg))
return sig.verify()
#The Fog Node receives the data packets and the signatures from the IoT device
#The public key of the IoT device is known publicly by the entire system
import timeit
from blspy import (PrivateKey, PublicKey, InsecureSignature, Signature,
PrependSignature, AggregationInfo, ExtendedPrivateKey,
Threshold, Util)
data = []
num = 3 #the number of data packets
# Add information required for verification, to sig object
dt3 = timeit.default_timer()
for x in range(num):
sig[x].set_aggregation_info(AggregationInfo.from_msg(pk[x], msg[x]))
ok = sig[x].verify()
print ("Signature Verification Time:",(dt4-dt3)*1000,"ms")