def aggregate_sigs_secure(signatures, public_keys, message_hashes):
"""
Aggregate signatures using the secure method, which calculates
exponents based on public keys, and raises each signature to an
exponent before multiplying them together. This is secure against
rogue public key attack, but is slower than simple aggregation.
"""
if (len(signatures) != len(public_keys)
or len(public_keys) != len(message_hashes)):
raise Exception("Invalid number of keys")
mh_pub_sigs = [(message_hashes[i], public_keys[i], signatures[i])
for i in range(len(signatures))]
# Sort by message hash + pk
mh_pub_sigs.sort()
computed_Ts = BLS.hash_pks(len(public_keys), public_keys)
# Raise each sig to a power of each t,
# and multiply all together into agg_sig
ec = public_keys[0].ec
agg_sig = JacobianPoint(Fq2.one(ec.q), Fq2.one(ec.q), Fq2.zero(ec.q),
True, ec)
for i, (_, _, signature) in enumerate(mh_pub_sigs):
agg_sig += signature * computed_Ts[i]
return Signature.from_g2(agg_sig)
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 bls_search(lc, target_ID, save_path):
"""
Perform bls analysis using foreman-mackey's bls.py function
"""
durations = np.linspace(0.05, 0.2, 22) * u.day
model = BLS(lc.time * u.day, lc.flux)
results = model.autopower(durations, frequency_factor=5.0)
# Find the period and epoch of the peak
index = np.argmax(results.power)
period = results.period[index]
t0 = results.transit_time[index]
duration = results.duration[index]
transit_info = model.compute_stats(period, duration, t0)
epoch = transit_info['transit_times'][0]
fig, ax = plt.subplots(1, 1, figsize=(8, 4))
# Highlight the harmonics of the peak period
ax.axvline(period.value, alpha=0.4, lw=3)
for n in range(2, 10):
ax.axvline(n * period.value, alpha=0.4, lw=1, linestyle="dashed")
ax.axvline(period.value / n, alpha=0.4, lw=1, linestyle="dashed")
# Plot the periodogram
ax.plot(results.period, results.power, "k", lw=0.5)
ax.set_xlim(results.period.min().value, results.period.max().value)
ax.set_xlabel("period [days]")
ax.set_ylabel("log likelihood")
ax.set_title('{} - BLS Periodogram'.format(target_ID))
#plt.savefig(save_path + '{} - BLS Periodogram.png'.format(target_ID))
# plt.close(fig)
# Fold by most significant period
phase_fold_plot(lc.time * u.day,
lc.flux,
period,
epoch,
target_ID,
save_path,
title='{} Lightcurve folded by {} days'.format(
target_ID, period))
return results, transit_info
def test2():
seed = bytes([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
seed2 = bytes([1, 20, 102, 229, 1, 157])
sk = PrivateKey.from_seed(seed)
sk_cp = PrivateKey.from_seed(seed)
sk2 = PrivateKey.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)
pk2_ser = pk2.serialize()
pk2_copy = PublicKey.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()
sig_cp = Signature.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)
sig2 = sk2.sign(message)
assert(sig.size() == 96)
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
def boxleastsq(BJD, flux, mindur=0.5, maxdur=10.0):
'''
Box least squares module that uses bls.py from:
https://github.com/dfm/bls.py
Input:
BJD : array - barycentric julian dates.
flux : array - the normalized flux.
mindur : float - the minimum duration of the transist.
maxdur : float - the maximum duration of the transist.
Output:
BLSdict : dict - dictionary containing period, mid transit time, transit duration, transit
depth, and the error on the depth.
results : object - the results from the BLS.
'''
## BOX LEASTSQUARE
durations = np.linspace(mindur, maxdur, 10) * u.hour
model = BLS(BJD * u.day, flux)
results = model.autopower(durations,
minimum_n_transit=2,
frequency_factor=5.0)
period = results.period[np.argmax(results.power)].value
t0 = results.transit_time[np.argmax(results.power)].value
dur = results.duration[np.argmax(results.power)].value
dep = results.depth[np.argmax(results.power)]
errdep = results.depth_err[np.argmax(results.power)]
dep_even = model.compute_stats(period, dur, t0)['depth_even'][0]
dep_odd = model.compute_stats(period, dur, t0)['depth_odd'][0]
BLSdict = {
'period': period,
'midtransit_time': t0,
'duration': dur,
'depth': dep,
'errdepth': errdep,
'depth_even': dep_even,
'depth_odd': dep_odd
}
return BLSdict, results
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 do_bls(self):
"""
"""
self.bls_time = self.time[30:-20]
self.bls_flux = self.det_flux[30:-20]
durations = np.linspace(0.05, 0.2, 10)
bls_model = BLS(self.bls_time, self.bls_flux)
bls_results = bls_model.autopower(durations, frequency_factor=5.0)
self.bls_results = bls_results
index = np.argmax(bls_results.power)
bls_period = bls_results.period[index]
bls_t0 = bls_results.transit_time[index]
bls_duration = bls_results.duration[index]
bls_depth = bls_results.depth[index]
self.bls_model = bls_model
self.bls_period = bls_period
self.bls_t0 = bls_t0
self.bls_depth = bls_depth
self.bls_duration = bls_duration
def commit(blockchain, logger, values):
block_hash = values.get('block')
signers = values.get('n_list')
co_sig = values.get('co_sig')
if block_hash is None or co_sig is None:
return jsonify("tempered Data"), 300
# co_sig = bytes(co_sig, "ISO-8859-1")
# co_sig = Signature.from_bytes(co_sig)
block = blockchain.proposal_verified_list.get(block_hash)
if (block is None) or (signers is None):
return jsonify("tempered Data"), 301
# temp_co_sig = []
# if type(co_sig) == list:
# for each_sig in co_sig:
# each_sig = bytes(each_sig, "ISO-8859-1")
# each_sig = Signature.from_bytes(each_sig)
# temp_co_sig.append(each_sig)
#
# co_sig = Signature.aggregate(temp_co_sig)
# co_sig = str(co_sig.serialize(), "ISO-8859-1")
node_address = block.harvester
co_sig = BLS.deserialize(co_sig, Signature)
block_hash_hash_digest = sha256(str(block_hash).encode()).hexdigest()
if node_address in blockchain.public_key_list and block_hash_hash_digest not in blockchain.broadcast_list:
if len(signers) / len(blockchain.public_key_list) > 0.66:
_block = copy(block)
_block.signature = co_sig
_block.signers = signers
if _block.verify_block_signature(blockchain):
blockchain.broadcast_list.append(block_hash_hash_digest)
blockchain.broadcast_it("/commit", values)
logger.debug("commit fxn call using hash: " + block_hash)
blockchain.commit_queue[block_hash] = block
threading.Thread(target=blockchain.sign_commit_block,
args={blockchain.sign_commit_block_delay
}).start()
return jsonify("BlockChain should be updated "), 200
else:
logger.warning(
"given signature for commit verification is tempered")
return jsonify("BlockChain couldn't updated "), 201
else:
logger.warning("you did not get majority")
return jsonify("BlockChain couldn't updated "), 202
logger.warning("tempered data or retransmitted data")
return jsonify("BlockChain couldn't updated "), 203
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 = BLS.aggregate_sigs([sig1, sig2])
agg_pk = BLS.aggregate_pub_keys([pk1, pk2], True)
agg_sk = BLS.aggregate_priv_keys([sk1, sk2], [pk1, pk2], True)
assert(agg_sig.serialize() == bytes.fromhex("0a638495c1403b25be391ed44c0ab013390026b5892c796a85ede46310ff7d0e0671f86ebe0e8f56bee80f28eb6d999c0a418c5fc52debac8fc338784cd32b76338d629dc2b4045a5833a357809795ef55ee3e9bee532edfc1d9c443bf5bc658"))
assert(agg_sk.sign(bytes([7, 8, 9])).serialize() == agg_sig.serialize())
assert(BLS.verify(sig1))
assert(BLS.verify(agg_sig))
agg_sig.set_aggregation_info(AggregationInfo.from_msg(agg_pk, bytes([7, 8, 9])))
assert(BLS.verify(agg_sig))
sig1.set_aggregation_info(sig2.aggregation_info)
assert(not BLS.verify(sig1))
sig3 = sk1.sign(bytes([1, 2, 3]))
sig4 = sk1.sign(bytes([1, 2, 3, 4]))
sig5 = sk2.sign(bytes([1, 2]))
agg_sig2 = BLS.aggregate_sigs([sig3, sig4, sig5])
assert(BLS.verify(agg_sig2))
assert(agg_sig2.serialize() == bytes.fromhex("8b11daf73cd05f2fe27809b74a7b4c65b1bb79cc1066bdf839d96b97e073c1a635d2ec048e0801b4a208118fdbbb63a516bab8755cc8d850862eeaa099540cd83621ff9db97b4ada857ef54c50715486217bd2ecb4517e05ab49380c041e159b"))
def aggregate(public_keys, secure):
"""
Aggregates public keys together
"""
if len(public_keys) < 1:
raise Exception("Invalid number of keys")
public_keys.sort()
computed_Ts = BLS.hash_pks(len(public_keys), public_keys)
ec = public_keys[0].value.ec
sum_keys = JacobianPoint(Fq.one(ec.q), Fq.one(ec.q),
Fq.zero(ec.q), True, ec)
for i in range(len(public_keys)):
addend = public_keys[i].value
if secure:
addend *= computed_Ts[i]
sum_keys += addend
return PublicKey.from_g1(sum_keys)
def reply_proposed(blockchain, logger, values):
logger.debug("in reply_proposed fxn")
signature = values.get('p_signed')
node_address = values.get('address')
if signature is None or node_address is None:
return jsonify("Error: invalid json received, Bad request"), 200
if node_address not in blockchain.public_key_list:
return jsonify("Bad request"), 200
signature = BLS.deserialize(signature, Signature)
_block = copy(blockchain.proposed_block)
_block.signature = signature
_block.signers = []
_block.signers.append(node_address)
if _block.verify_block_signature(blockchain):
logger.debug("reply proposal signature verified")
blockchain.proposal_accepted[node_address] = signature
return jsonify("proposal reply signature verified"), 200
else:
logger.warning("proposal reply signature tempered")
return jsonify("proposal reply signature tempered"), 400
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 secure_merge_infos(colliding_infos):
"""
Infos are merged together with combination of exponents
"""
# Groups are sorted by message then pk then exponent
# Each info object (and all of it's exponents) will be
# exponentiated by one of the Ts
colliding_infos.sort()
sorted_keys = []
for info in colliding_infos:
for key, value in info.tree.items():
sorted_keys.append(key)
sorted_keys.sort()
sorted_pks = [public_key for (message_hash, public_key) in sorted_keys]
computed_Ts = BLS.hash_pks(len(colliding_infos), sorted_pks)
# Group order, exponents can be reduced mod the order
order = sorted_pks[0].value.ec.n
new_tree = {}
for i in range(len(colliding_infos)):
for key, value in colliding_infos[i].tree.items():
if key not in new_tree:
# This message & pk have not been included yet
new_tree[key] = (value * computed_Ts[i]) % order
else:
# This message and pk are already included, so multiply
addend = value * computed_Ts[i]
new_tree[key] = (new_tree[key] + addend) % order
mh_pubkeys = [k for k, v in new_tree.items()]
mh_pubkeys.sort()
message_hashes = [
message_hash for (message_hash, public_key) in mh_pubkeys
]
public_keys = [public_key for (message_hash, public_key) in mh_pubkeys]
return AggregationInfo(new_tree, message_hashes, public_keys)
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 aggregate(private_keys, public_keys, secure):
"""
Aggregates private keys together
"""
if not secure:
sum_keys = sum(pk.value for pk in private_keys) % default_ec.n
else:
if not public_keys:
raise Exception("Must include public keys in secure" +
" aggregation")
if len(private_keys) != len(public_keys):
raise Exception("Invalid number of keys")
priv_pub_keys = sorted(zip(public_keys, private_keys))
computed_Ts = BLS.hash_pks(len(private_keys), public_keys)
n = public_keys[0].value.ec.n
sum_keys = 0
for i, (_, privkey) in enumerate(priv_pub_keys):
sum_keys += privkey.value * computed_Ts[i]
sum_keys %= n
return PrivateKey.from_bytes(sum_keys.to_bytes(32, "big"))
def aggregate(signatures):
"""
Aggregates many (aggregate) signatures, using a combination of simple
and secure aggregation. Signatures are grouped based on which ones
share common messages, and these are all merged securely.
"""
public_keys = [] # List of lists
message_hashes = [] # List of lists
for signature in signatures:
if signature.aggregation_info.empty():
raise Exception(
"Each signature must have a valid aggregation " + "info")
public_keys.append(signature.aggregation_info.public_keys)
message_hashes.append(signature.aggregation_info.message_hashes)
# Find colliding vectors, save colliding messages
messages_set = set()
colliding_messages_set = set()
for msg_vector in message_hashes:
messages_set_local = set()
for msg in msg_vector:
if msg in messages_set and msg not in messages_set_local:
colliding_messages_set.add(msg)
messages_set.add(msg)
messages_set_local.add(msg)
if len(colliding_messages_set) == 0:
# There are no colliding messages between the groups, so we
# will just aggregate them all simply. Note that we assume
# that every group is a valid aggregate signature. If an invalid
# or insecure signature is given, and invalid signature will
# be created. We don't verify for performance reasons.
final_sig = Signature.aggregate_sigs_simple(signatures)
aggregation_infos = [sig.aggregation_info for sig in signatures]
final_agg_info = AggregationInfo.merge_infos(aggregation_infos)
final_sig.set_aggregation_info(final_agg_info)
return final_sig
# There are groups that share messages, therefore we need
# to use a secure form of aggregation. First we find which
# groups collide, and securely aggregate these. Then, we
# use simple aggregation at the end.
colliding_sigs = []
non_colliding_sigs = []
colliding_message_hashes = [] # List of lists
colliding_public_keys = [] # List of lists
for i in range(len(signatures)):
group_collides = False
for msg in message_hashes[i]:
if msg in colliding_messages_set:
group_collides = True
colliding_sigs.append(signatures[i])
colliding_message_hashes.append(message_hashes[i])
colliding_public_keys.append(public_keys[i])
break
if not group_collides:
non_colliding_sigs.append(signatures[i])
# Arrange all signatures, sorted by their aggregation info
colliding_sigs.sort(key=lambda s: s.aggregation_info)
# Arrange all public keys in sorted order, by (m, pk)
sort_keys_sorted = []
for i in range(len(colliding_public_keys)):
for j in range(len(colliding_public_keys[i])):
sort_keys_sorted.append((colliding_message_hashes[i][j],
colliding_public_keys[i][j]))
sort_keys_sorted.sort()
sorted_public_keys = [pk for (mh, pk) in sort_keys_sorted]
computed_Ts = BLS.hash_pks(len(colliding_sigs), sorted_public_keys)
# Raise each sig to a power of each t,
# and multiply all together into agg_sig
ec = sorted_public_keys[0].value.ec
agg_sig = JacobianPoint(Fq2.one(ec.q), Fq2.one(ec.q), Fq2.zero(ec.q),
True, ec)
for i, signature in enumerate(colliding_sigs):
agg_sig += signature.value * computed_Ts[i]
for signature in non_colliding_sigs:
agg_sig += signature.value
final_sig = Signature.from_g2(agg_sig)
aggregation_infos = [sig.aggregation_info for sig in signatures]
final_agg_info = AggregationInfo.merge_infos(aggregation_infos)
final_sig.set_aggregation_info(final_agg_info)
return final_sig
def check_proposed(blockchain, logger, values):
block = values.get('block')
sig = values.get('sig')
a = values.get('int_a')
b = values.get('int_b')
if (block is None) or (sig is None) or (a is None) or (b is None):
return jsonify("Error: invalid json data received"), 301
# sig = bytes(sig, "ISO-8859-1")
# sig = Signature.from_bytes(sig)
block = Block.create_block(block)
flag = block.verify_block(blockchain)
node_address = block.harvester
if not flag:
url = "http://" + node_address + "/check_conflict"
json_data = {'node_address': blockchain.address}
try:
response = requests.post(url, json=json_data)
blockchain.logger.info("----conflict response----")
blockchain.logger.info(response.status_code)
blockchain.logger.info(response.json())
blockchain.logger.info("****conflict response****")
except:
pass
print(node_address, " block didn't verified ")
return jsonify("invalid block!"), 302
# leader verification
blockchain.logger.info("----fp----")
blockchain.logger.info("before_true_leader " + node_address)
blockchain.logger.info("first_sign_hash " +
sha256(a.encode()).hexdigest())
blockchain.logger.info("second_sign_hash " +
sha256(b.encode()).hexdigest())
blockchain.logger.info("****fp****")
is_verified_leader = blockchain.true_leader(a, b, node_address)
if not is_verified_leader:
print("invalid leader", node_address)
return jsonify("invalid leader!"), 303
sig = BLS.deserialize(sig, Signature)
# verify whether proposed block is from valid validator(node) with valid signature
if node_address in blockchain.public_key_list and block.get_hash(
) not in blockchain.broadcast_list:
_block = copy(block)
_block.signature = sig
_block.signers = []
_block.signers.append(node_address)
if _block.verify_block_signature(blockchain):
# print("received proposed block, signature verified")
blockchain.broadcast_list.append(block.get_hash())
blockchain.broadcast_it("/proposed", values)
logger.debug("proposed fxn call using hash: " +
block.get_hash())
blockchain.proposal_queue[a] = block
threading.Thread(target=blockchain.sign_proposed_block,
args={blockchain.sign_proposed_block_delay
}).start()
else:
print("verify_block_signature")
return jsonify("block signature couldn't verified"), 304
return jsonify("True"), 200
def test_vectors2():
m1 = bytes([1, 2, 3, 40])
m2 = bytes([5, 6, 70, 201])
m3 = bytes([9, 10, 11, 12, 13])
m4 = bytes([15, 63, 244, 92, 0, 1])
sk1 = PrivateKey.from_seed(bytes([1, 2, 3, 4, 5]))
sk2 = PrivateKey.from_seed(bytes([1, 2, 3, 4, 5, 6]))
sig1 = sk1.sign(m1)
sig2 = sk2.sign(m2)
sig3 = sk2.sign(m1)
sig4 = sk1.sign(m3)
sig5 = sk1.sign(m1)
sig6 = sk1.sign(m4)
sig_L = BLS.aggregate_sigs([sig1, sig2])
sig_R = BLS.aggregate_sigs([sig3, sig4, sig5])
assert(BLS.verify(sig_L))
assert(BLS.verify(sig_R))
sig_final = BLS.aggregate_sigs([sig_L, sig_R, sig6])
assert(sig_final.serialize() == bytes.fromhex("07969958fbf82e65bd13ba0749990764cac81cf10d923af9fdd2723f1e3910c3fdb874a67f9d511bb7e4920f8c01232b12e2fb5e64a7c2d177a475dab5c3729ca1f580301ccdef809c57a8846890265d195b694fa414a2a3aa55c32837fddd80"))
assert(BLS.verify(sig_final))
quotient = sig_final.divide_by([sig2, sig5, sig6])
assert(BLS.verify(quotient))
assert(BLS.verify(sig_final))
assert(quotient.serialize() == bytes.fromhex("8ebc8a73a2291e689ce51769ff87e517be6089fd0627b2ce3cd2f0ee1ce134b39c4da40928954175014e9bbe623d845d0bdba8bfd2a85af9507ddf145579480132b676f027381314d983a63842fcc7bf5c8c088461e3ebb04dcf86b431d6238f"))
assert(quotient.divide_by([]) == quotient)
try:
quotient.divide_by([sig6])
assert(False) # Should fail due to not subset
except:
pass
sig_final.divide_by([sig1]) # Should not throw
try:
sig_final.divide_by([sig_L]) # Should throw due to not unique
assert(False) # Should fail due to not unique
except:
pass
# Divide by aggregate
sig7 = sk2.sign(m3)
sig8 = sk2.sign(m4)
sig_R2 = BLS.aggregate_sigs([sig7, sig8])
sig_final2 = BLS.aggregate_sigs([sig_final, sig_R2])
quotient2 = sig_final2.divide_by([sig_R2])
assert(BLS.verify(quotient2))
assert(quotient2.serialize() == bytes.fromhex("06af6930bd06838f2e4b00b62911fb290245cce503ccf5bfc2901459897731dd08fc4c56dbde75a11677ccfbfa61ab8b14735fddc66a02b7aeebb54ab9a41488f89f641d83d4515c4dd20dfcf28cbbccb1472c327f0780be3a90c005c58a47d3"))
def __init__(self, infile, inject=False, **kwargs):
self.d = d = pf.getdata(infile, 1)
m = isfinite(d.flux_1) & (~(d.mflags_1 & 2**3).astype(np.bool))
m &= ~binary_dilation((d.quality & 2**20) != 0)
self.Kp = pf.getval(infile, 'kepmag')
self.Kp = self.Kp if not isinstance(self.Kp, Undefined) else nan
self.tm = MA(supersampling=12, nthr=1)
self.em = MA(supersampling=10, nldc=0, nthr=1)
self.epic = int(basename(infile).split('_')[1])
self.time = d.time[m]
self.flux = (d.flux_1[m] - d.trend_t_1[m] + nanmedian(d.trend_t_1[m]) -
d.trend_p_1[m] + nanmedian(d.trend_p_1[m]))
self.mflux = nanmedian(self.flux)
self.flux /= self.mflux
self.flux_e = d.error_1[m] / abs(self.mflux)
self.flux_r = d.flux_1[m] / self.mflux
self.trend_t = d.trend_t_1[m] / self.mflux
self.trend_p = d.trend_p_1[m] / self.mflux
self.period_range = kwargs.get(
'period_range', (0.7, 0.98 * (self.time.max() - self.time.min())))
self.nbin = kwargs.get('nbin', 900)
self.qmin = kwargs.get('qmin', 0.002)
self.qmax = kwargs.get('qmax', 0.115)
self.nf = kwargs.get('nfreq', 10000)
self.bls = BLS(self.time,
self.flux,
self.flux_e,
period_range=self.period_range,
nbin=self.nbin,
qmin=self.qmin,
qmax=self.qmax,
nf=self.nf,
pmean='running_median')
def ndist(p=0.302):
return 1. - 2 * abs(((self.bls.period - p) % p) / p - 0.5)
def cmask(s=0.05):
return 1. - np.exp(-ndist() / s)
self.bls.pmul = cmask()
try:
ar, ac, ap, at = acor(self.flux_r)[0], acor(self.flux)[0], acor(
self.trend_p)[0], acor(self.trend_t)[0]
except RuntimeError:
ar, ac, ap, at = nan, nan, nan, nan
self.lcinfo = array(
(self.epic, self.mflux, self.flux.std(), nan, nan, ar, ac, ap, at),
dtype=dt_lcinfo)
self._rbls = None
self._rtrf = None
self._rvar = None
self._rtoe = None
self._rpol = None
self._recl = None
## Transit fit pv [k u t0 p a i]
self._pv_bls = None
self._pv_trf = None
self.period = None
self.zero_epoch = None
self.duration = None
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))
assert(BLS.verify(sig))
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 = BLS.aggregate_sigs([sig1, sig2])
agg_pubkey = BLS.aggregate_pub_keys([pk1, pk2], True)
agg_sig.set_aggregation_info(AggregationInfo.from_msg(agg_pubkey, msg))
assert(BLS.verify(agg_sig))
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 = BLS.aggregate_sigs([sig1, sig2])
agg_sig_final = BLS.aggregate_sigs([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)
assert(BLS.verify(agg_sig_final))
assert(BLS.verify(agg_sig_l))
agg_sig_final = agg_sig_final.divide_by([agg_sig_l])
assert(BLS.verify(agg_sig_final))
agg_sk = BLS.aggregate_priv_keys([sk1, sk2], [pk1, pk2], True)
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)
assert(sk_child.get_extended_public_key() == pk_child)
near_peak_or_trough = np.array(near_peak_or_trough)
t_cut = lc_30min.time[~near_peak_or_trough]
flux_cut = combined_flux[~near_peak_or_trough]
flux_err_cut = lc_30min.flux_err[~near_peak_or_trough]
# flux = combined_flux
# frequency, power = LombScargle(lc_30min.time, flux).autopower()
# plt.plot(frequency, power)
# i = np.argmax(power)
# freq_rot = frequency[i]
# p_rot = 1/freq_rot
durations = np.linspace(0.05, 0.2, 22) * u.day
model = BLS(lc_30min.time*u.day, combined_flux)
# model = BLS(lc_30min.time*u.day, BLS_flux)
results = model.autopower(durations, frequency_factor=5.0)
# Find the period and epoch of the peak
rot_index = np.argmax(results.power)
rot_period = results.period[rot_index]
rot_t0 = results.transit_time[rot_index]
## p_rot = 3.933 # AB Pic
## p_rot = 3.6 # HIP 1113
## p_rot = 4.36 # HIP 1993
## p_rot = 3.405 # HIP 105388
## p_rot = 3.9 # HIP 32235
## p_rot = 2.67 # AO Men
## p_rot = 0.57045 # 2 MASS J23261069-7323498
def test_threshold_instance(T, N):
commitments = []
# fragments[i][j] = fragment held by player i,
# received from player j
fragments = [[None] * N for _ in range(N)]
secrets = []
# Step 1 : PrivateKey.new_threshold
for player in range(N):
secret_key, commi, frags = PrivateKey.new_threshold(T, N)
for target, frag in enumerate(frags):
fragments[target][player] = frag
commitments.append(commi)
secrets.append(secret_key)
# Step 2 : Threshold.verify_secret_fragment
for player_source in range(1, N+1):
for player_target in range(1, N+1):
assert Threshold.verify_secret_fragment(
T, fragments[player_target - 1][player_source - 1],
player_target, commitments[player_source - 1])
# Step 3 : master_pubkey = BLS.aggregate_pub_keys(...)
# secret_share = BLS.aggregate_priv_keys(...)
master_pubkey = BLS.aggregate_pub_keys(
[PublicKey.from_g1(cpoly[0].to_jacobian())
for cpoly in commitments],
False)
secret_shares = [BLS.aggregate_priv_keys(map(PrivateKey, row), None, False)
for row in fragments]
master_privkey = BLS.aggregate_priv_keys(secrets, None, False)
msg = 'Test'
signature_actual = master_privkey.sign(msg)
# Step 4 : sig_share = secret_share.sign_threshold(...)
# Check every combination of T players
for X in combinations(range(1, N+1), T):
# X: a list of T indices like [1, 2, 5]
# Check underlying secret key is correct
r = Threshold.interpolate_at_zero(X,
[secret_shares[x-1].value for x in X])
secret_cand = PrivateKey(r)
assert secret_cand == master_privkey
# Check signatures
signature_shares = [secret_shares[x-1].sign_threshold(msg, x, X)
for x in X]
signature_cand = BLS.aggregate_sigs_simple(signature_shares)
assert signature_cand == signature_actual
# Check that the signature actually verifies the message
agg_info = AggregationInfo.from_msg(master_pubkey, msg)
signature_actual.set_aggregation_info(agg_info)
assert BLS.verify(signature_actual)
# Step 4b : Alternatively, we can add the lagrange coefficients
# to 'unit' signatures.
for X in combinations(range(1, N+1), T):
# X: a list of T indices like [1, 2, 5]
# Check signatures
signature_shares = [secret_shares[x-1].sign(msg) for x in X]
signature_cand = Threshold.aggregate_unit_sigs(signature_shares, X, T)
assert signature_cand == signature_actual
## Use the default #lc3 = tpf2.to_lightcurve(aperture_mask=tpf.pipeline_mask).flatten(window_length=1001) #lc3 = lc3[(lc3.time < 1346) | (lc3.time > 1350)].remove_outliers(6).fold(period=6.27, phase=0.4).bin(10) # ## Use a custom aperture #custom_lc3 = tpf2.to_lightcurve(aperture_mask=aperture_mask).flatten(window_length=1001) #custom_lc3 = custom_lc3[(custom_lc3.time < 1346) | (custom_lc3.time > 1350)].remove_outliers(6).fold(period=6.27, phase=0.4).bin(10) # ## Plot both #ax = lc3.errorbar(label='Default aperture') #custom_lc3.errorbar(ax=ax, label='Custom aperture') ############################ bls.py stuff ##################################### durations = np.linspace(0.05, 0.2, 22) * u.day model = BLS(lc.time * u.day, TESSflatten_lc) results = model.autopower(durations, frequency_factor=5.0) # Find the period and epoch of the peak index = np.argmax(results.power) period = results.period[index] t0 = results.transit_time[index] duration = results.duration[index] transit_info = model.compute_stats(period, duration, t0) epoch = transit_info['transit_times'][0] fig, ax = plt.subplots(1, 1, figsize=(8, 4)) # Highlight the harmonics of the peak period ax.axvline(period.value, alpha=0.4, lw=3)
stmodel = ((tmodel - tmodel.min()) / max(tmodel - tmodel.min()))[:2000]
intrans = -1 * (stmodel[stmodel < 1] - 1)
xp = np.linspace(0, 1, len(intrans))
fmodel = lambda x: np.interp(x, xp, intrans)
# search for periodic signals
# compute the phase space to search
pdata = BLLS(t, data, fmodel, np.linspace(2, 10, 250),
np.linspace(0.05, 0.15, 50))
snr = np.array(pdata.m) * -1 / np.array(pdata.std)
# figure out BLS scaling to SNR
bls = BLS(t,
data,
np.ones(dataerr.shape[0]),
period_range=(2, 10),
q_range=(0.05, 0.15),
nf=500,
nbin=100)
res = bls()
periods = 1. / bls.freqs
fig = plt.figure()
ax0 = plt.subplot2grid((1, 3), (0, 0), colspan=2)
ax1 = plt.subplot2grid((1, 3), (0, 2))
#ax2 = plt.subplot2grid((2,2),(1,1))
ax0.plot(t, data, 'k.', alpha=0.5)
ax0.set_title("Test Data")
ax0.set_ylabel("Relative Flux")
ax0.set_xlabel("Time [day]")
plt.title(
'{} LombScargle Periodogram for original lc'.format(target_ID))
#ls_plot.show(block=True)
ls_fig.savefig(save_path +
'{} - Lomb-Sacrgle Periodogram for original lc.png'.
format(target_ID))
plt.close(ls_fig)
i = np.argmax(power)
freq_rot = freq[i]
p_rot = 1 / freq_rot
print('Rotation Period = {:.3f}d'.format(p_rot))
# From BLS
durations = np.linspace(0.05, 0.2, 100) * u.day
#model = BoxLeastSquares(lc_30min.time*u.day, normalized_flux)
model = BLS(lc_30min.time * u.day, normalized_flux)
results = model.autopower(durations, frequency_factor=5.0)
rot_index = np.argmax(results.power)
rot_period = results.period[rot_index]
rot_t0 = results.transit_time[rot_index]
print("Rotation Period from BLS of original = {}d".format(rot_period))
########################### batman stuff ######################################
# type_of_planet = 'Hot Jupiter'
# stellar_type = 'F or G'
#params = batman.TransitParams() #object to store transit parameters
#print("batman works y'all")
#params.t0 = -4.5 #time of inferior conjunction
#params.per = 8.0 #orbital period (days) - try 0.5, 1, 2, 4, 8 & 10d periods
# Change for type of star
#params.rp = 0.05 #planet radius (in units of stellar radii) - Try between 0.01 and 0.1 (F/G) or 0.025 to 0.18 (K/M)
TESSflatten_fig = plt.figure()
TESSflatten_lc = lc[:, 1]
plt.scatter(lc[:, 0], TESSflatten_lc, c='k', s=1, label='TESSflatten flux')
#plt.scatter(p1_times, p1_marker_y, c = 'r', s = 5, label = 'Planet 1')
#plt.scatter(p2_times, p2_marker_y, c = 'g', s = 5, label = 'Planet 2')
plt.title('{} with TESSflatten - Sector {}'.format(target_ID, sector))
plt.ylabel('Normalized Flux')
plt.xlabel('Time - 2457000 [BTJD days]')
#plt.savefig(save_path + '{} - Sector {} - TESSflatten lightcurve.png'.format(target_ID, tpf.sector))
#plt.close(TESSflatten_fig)
plt.show()
# Create periodogram
durations = np.linspace(0.05, 0.2, 22) * u.day
model = BLS(lc[:, 0] * u.day, lc[:, 1])
results = model.autopower(durations, frequency_factor=5.0)
# Find the period and epoch of the peak
index = np.argmax(results.power)
period = results.period[index]
t0 = results.transit_time[index]
duration = results.duration[index]
transit_info = model.compute_stats(period, duration, t0)
epoch = transit_info['transit_times'][0]
fig, ax = plt.subplots(1, 1, figsize=(8, 4))
# Highlight the harmonics of the peak period
ax.axvline(period.value, alpha=0.4, lw=3)