mirror of
https://github.com/LBRYFoundation/LBRY-Vault.git
synced 2025-08-28 16:01:30 +00:00
lnbase: compact commitment secret storage
This commit is contained in:
Janus
SomberNight
parent
6d1594e28a
commit
29e81d53db
2 changed files with 494 additions and 2 deletions
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@ -319,6 +319,20 @@ def derive_blinded_pubkey(basepoint, per_commitment_point):
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k2 = ser_to_point(per_commitment_point) * bitcoin.string_to_number(bitcoin.sha256(per_commitment_point + basepoint))
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k2 = ser_to_point(per_commitment_point) * bitcoin.string_to_number(bitcoin.sha256(per_commitment_point + basepoint))
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return point_to_ser(k1 + k2)
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return point_to_ser(k1 + k2)
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def shachain_derive(element, toIndex):
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""" compact per-commitment secret storage, taken from lnd """
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fromIndex = element.index
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positions = derive_bit_transformations(fromIndex, toIndex)
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buf = bytearray(element.secret)
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for position in positions:
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byteNumber = position // 8
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bitNumber = position % 8
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buf[byteNumber] ^= 1 << bitNumber
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h = bitcoin.sha256(buf)
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buf = bytearray(h)
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return ShachainElement(index=toIndex, secret=bytes(buf))
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def get_per_commitment_secret_from_seed(seed: bytes, i: int, bits: int = 47) -> bytes:
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def get_per_commitment_secret_from_seed(seed: bytes, i: int, bits: int = 47) -> bytes:
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"""Generate per commitment secret."""
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"""Generate per commitment secret."""
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@ -328,7 +342,9 @@ def get_per_commitment_secret_from_seed(seed: bytes, i: int, bits: int = 47) ->
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if i & mask:
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if i & mask:
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per_commitment_secret[bitindex // 8] ^= 1 << (bitindex % 8)
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per_commitment_secret[bitindex // 8] ^= 1 << (bitindex % 8)
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per_commitment_secret = bytearray(bitcoin.sha256(per_commitment_secret))
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per_commitment_secret = bytearray(bitcoin.sha256(per_commitment_secret))
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return bytes(per_commitment_secret)
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bajts = bytes(per_commitment_secret)
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assert shachain_derive(ShachainElement(index=0, secret=seed), i).secret == bajts
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return bajts
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def overall_weight(num_htlc):
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def overall_weight(num_htlc):
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@ -1127,7 +1143,6 @@ class Peer(PrintError):
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)
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)
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)
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)
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def on_commitment_signed(self, payload):
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def on_commitment_signed(self, payload):
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self.print_error("commitment_signed", payload)
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self.print_error("commitment_signed", payload)
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channel_id = int.from_bytes(payload['channel_id'], 'big')
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channel_id = int.from_bytes(payload['channel_id'], 'big')
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@ -1546,4 +1561,52 @@ def process_onion_packet(onion_packet: OnionPacket, associated_data: bytes,
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are_we_final = False
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are_we_final = False
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return ProcessedOnionPacket(are_we_final, hop_data, next_onion_packet)
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return ProcessedOnionPacket(are_we_final, hop_data, next_onion_packet)
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def count_trailing_zeros(index):
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""" BOLT-03 (where_to_put_secret) """
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try:
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return list(reversed(bin(index)[2:])).index("1")
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except ValueError:
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return 48
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ShachainElement = namedtuple("ShachainElement", ["secret", "index"])
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class RevocationStore:
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""" taken from lnd """
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def __init__(self):
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self.buckets = {}
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self.index = 2**48 - 1
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def set_index(self, index):
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self.index = index
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def add_next_entry(self, hsh):
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new_element = ShachainElement(index=self.index, secret=hsh)
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bucket = count_trailing_zeros(self.index)
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for i in range(0, bucket):
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if i not in self.buckets: return
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this_bucket = self.buckets[i]
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e = shachain_derive(new_element, this_bucket.index)
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if e != this_bucket:
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return "hash is not derivable: {} {} {}".format(bh2u(e.secret), bh2u(this_bucket.secret), this_bucket.index)
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self.buckets[bucket] = new_element
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self.index -= 1
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return
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def get_prefix(index, position):
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""" taken from lnd """
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mask = (1<<64)-1 - ((1<<position)-1)
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return index & mask
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def derive_bit_transformations(fromm, to):
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""" taken from lnd """
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positions = []
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if fromm == to: return positions
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zeros = count_trailing_zeros(fromm)
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if fromm > (1<<64)-1: raise Exception("fromm too big")
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if fromm != get_prefix(to, zeros):
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raise Exception("prefixes are different, indexes are not derivable")
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for position in range(zeros, -1, -1):
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if to >> position & 1 == 1:
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positions.append(position)
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return positions
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@ -7,6 +7,7 @@ from lib.lnbase import make_commitment, get_obscured_ctn, Peer, make_offered_htl
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from lib.lnbase import secret_to_pubkey, derive_pubkey, derive_privkey, derive_blinded_pubkey, overall_weight
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from lib.lnbase import secret_to_pubkey, derive_pubkey, derive_privkey, derive_blinded_pubkey, overall_weight
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from lib.lnbase import make_htlc_tx_output, make_htlc_tx_inputs, get_per_commitment_secret_from_seed
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from lib.lnbase import make_htlc_tx_output, make_htlc_tx_inputs, get_per_commitment_secret_from_seed
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from lib.lnbase import make_htlc_tx_witness, OnionHopsDataSingle, new_onion_packet, OnionPerHop
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from lib.lnbase import make_htlc_tx_witness, OnionHopsDataSingle, new_onion_packet, OnionPerHop
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from lib.lnbase import RevocationStore, derive_bit_transformations
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from lib.transaction import Transaction
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from lib.transaction import Transaction
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from lib import bitcoin
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from lib import bitcoin
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import ecdsa.ellipticcurve
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import ecdsa.ellipticcurve
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@ -383,3 +384,431 @@ class Test_LNBase(unittest.TestCase):
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processed_packet = lnbase.process_onion_packet(packet, associated_data, privkey)
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processed_packet = lnbase.process_onion_packet(packet, associated_data, privkey)
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self.assertEqual(hops_data[i].per_hop.to_bytes(), processed_packet.hop_data.per_hop.to_bytes())
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self.assertEqual(hops_data[i].per_hop.to_bytes(), processed_packet.hop_data.per_hop.to_bytes())
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packet = processed_packet.next_packet
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packet = processed_packet.next_packet
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def test_shachain_producer(self):
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from collections import namedtuple
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tests = []
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DeriveTest = namedtuple("DeriveTest", ["name", "fromm", "to", "position", "should_fail"])
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tests.append(DeriveTest("zero 'from' 'to'", 0, 0, [], False))
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tests.append(DeriveTest("same indexes #1", 0b100, 0b100, [], False))
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tests.append(DeriveTest("same indexes #2", 0b1, 0b0, None, True))
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tests.append(DeriveTest("test seed 'from'", 0b0, 0b10, [1], False))
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tests.append(DeriveTest("not the same indexes", 0b1100, 0b0100, None, True))
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tests.append(DeriveTest("'from' index greater than 'to' index", 0b1010, 0b1000, None, True))
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tests.append(DeriveTest("zero number trailing zeros", 0b1, 0b1, [], False))
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for test in tests:
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try:
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pos = derive_bit_transformations(test.fromm, test.to)
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if test.should_fail:
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raise Exception("test did not fail")
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self.assertEqual(test.position, pos)
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except:
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if not test.should_fail:
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raise Exception(test.name)
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def test_shachain_store(self):
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tests = [
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{
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"name": "insert_secret correct sequence",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
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"e6e8db3be6854c475621e007a5dc",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "c7518c8ae4660ed02894df8976fa1a3659c1" +\
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"a8b4b5bec0c4b872abeba4cb8964",
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"successful": True
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},
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{
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"index": 281474976710653,
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"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
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"cbf9cd7c043a7d6456b7fc275ad8",
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"successful": True
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},
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{
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"index": 281474976710652,
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"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab2" +\
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"1e9b506fd4998a51d54502e99116",
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"successful": True
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},
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{
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"index": 281474976710651,
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"secret": "c65716add7aa98ba7acb236352d665cab173" +\
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"45fe45b55fb879ff80e6bd0c41dd",
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"successful": True
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},
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{
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"index": 281474976710650,
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"secret": "969660042a28f32d9be17344e09374b37996" +\
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"2d03db1574df5a8a5a47e19ce3f2",
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"successful": True
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},
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{
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"index": 281474976710649,
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"secret": "a5a64476122ca0925fb344bdc1854c1c0a59" +\
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"fc614298e50a33e331980a220f32",
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"successful": True
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},
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{
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"index": 281474976710648,
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"secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
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"31447732e3802e1f7ac44b650e17",
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"successful": True
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}
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]
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},
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{
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"name": "insert_secret #1 incorrect",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "02a40c85b6f28da08dfdbe0926c53fab2d" +\
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"e6d28c10301f8f7c4073d5e42e3148",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "c7518c8ae4660ed02894df8976fa1a3659" +\
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"c1a8b4b5bec0c4b872abeba4cb8964",
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"successful": False
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}
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]
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},
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{
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"name": "insert_secret #2 incorrect (#1 derived from incorrect)",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "02a40c85b6f28da08dfdbe0926c53fab2de6" +\
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"d28c10301f8f7c4073d5e42e3148",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "dddc3a8d14fddf2b68fa8c7fbad274827493" +\
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"7479dd0f8930d5ebb4ab6bd866a3",
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"successful": True
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},
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{
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"index": 281474976710653,
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"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
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"cbf9cd7c043a7d6456b7fc275ad8",
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"successful": True
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},
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{
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"index": 281474976710652,
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"secret": "27cddaa5624534cb6cb9d7da077cf2b22a" +\
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"b21e9b506fd4998a51d54502e99116",
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"successful": False
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}
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]
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},
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{
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"name": "insert_secret #3 incorrect",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
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"e6e8db3be6854c475621e007a5dc",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "c7518c8ae4660ed02894df8976fa1a3659c1" +\
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"a8b4b5bec0c4b872abeba4cb8964",
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"successful": True
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},
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{
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"index": 281474976710653,
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"secret": "c51a18b13e8527e579ec56365482c62f180b" +\
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"7d5760b46e9477dae59e87ed423a",
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"successful": True
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},
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{
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"index": 281474976710652,
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"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab2" +\
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"1e9b506fd4998a51d54502e99116",
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"successful": False
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}
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]
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},
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{
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"name": "insert_secret #4 incorrect (1,2,3 derived from incorrect)",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "02a40c85b6f28da08dfdbe0926c53fab2de6" +\
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"d28c10301f8f7c4073d5e42e3148",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "dddc3a8d14fddf2b68fa8c7fbad274827493" +\
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"7479dd0f8930d5ebb4ab6bd866a3",
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"successful": True
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},
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{
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"index": 281474976710653,
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"secret": "c51a18b13e8527e579ec56365482c62f18" +\
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"0b7d5760b46e9477dae59e87ed423a",
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"successful": True
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},
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{
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"index": 281474976710652,
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"secret": "ba65d7b0ef55a3ba300d4e87af29868f39" +\
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"4f8f138d78a7011669c79b37b936f4",
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"successful": True
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},
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{
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"index": 281474976710651,
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"secret": "c65716add7aa98ba7acb236352d665cab1" +\
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"7345fe45b55fb879ff80e6bd0c41dd",
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"successful": True
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},
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{
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"index": 281474976710650,
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"secret": "969660042a28f32d9be17344e09374b379" +\
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"962d03db1574df5a8a5a47e19ce3f2",
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"successful": True
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},
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{
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"index": 281474976710649,
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"secret": "a5a64476122ca0925fb344bdc1854c1c0a" +\
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"59fc614298e50a33e331980a220f32",
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"successful": True
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},
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{
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"index": 281474976710649,
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"secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
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"31447732e3802e1f7ac44b650e17",
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"successful": False
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}
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]
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},
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{
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"name": "insert_secret #5 incorrect",
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"inserts": [
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{
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"index": 281474976710655,
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"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
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"e6e8db3be6854c475621e007a5dc",
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"successful": True
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},
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{
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"index": 281474976710654,
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"secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
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"8b4b5bec0c4b872abeba4cb8964",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710653,
|
||||||
|
"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
|
||||||
|
"cbf9cd7c043a7d6456b7fc275ad8",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710652,
|
||||||
|
"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
|
||||||
|
"e9b506fd4998a51d54502e99116",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710651,
|
||||||
|
"secret": "631373ad5f9ef654bb3dade742d09504c567" +\
|
||||||
|
"edd24320d2fcd68e3cc47e2ff6a6",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710650,
|
||||||
|
"secret": "969660042a28f32d9be17344e09374b37996" +\
|
||||||
|
"2d03db1574df5a8a5a47e19ce3f2",
|
||||||
|
"successful": False
|
||||||
|
}
|
||||||
|
]
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "insert_secret #6 incorrect (5 derived from incorrect)",
|
||||||
|
"inserts": [
|
||||||
|
{
|
||||||
|
"index": 281474976710655,
|
||||||
|
"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
|
||||||
|
"e6e8db3be6854c475621e007a5dc",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710654,
|
||||||
|
"secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
|
||||||
|
"8b4b5bec0c4b872abeba4cb8964",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710653,
|
||||||
|
"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
|
||||||
|
"cbf9cd7c043a7d6456b7fc275ad8",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710652,
|
||||||
|
"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
|
||||||
|
"e9b506fd4998a51d54502e99116",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710651,
|
||||||
|
"secret": "631373ad5f9ef654bb3dade742d09504c567" +\
|
||||||
|
"edd24320d2fcd68e3cc47e2ff6a6",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710650,
|
||||||
|
"secret": "b7e76a83668bde38b373970155c868a65330" +\
|
||||||
|
"4308f9896692f904a23731224bb1",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710649,
|
||||||
|
"secret": "a5a64476122ca0925fb344bdc1854c1c0a59f" +\
|
||||||
|
"c614298e50a33e331980a220f32",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710648,
|
||||||
|
"secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
|
||||||
|
"31447732e3802e1f7ac44b650e17",
|
||||||
|
"successful": False
|
||||||
|
}
|
||||||
|
]
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "insert_secret #7 incorrect",
|
||||||
|
"inserts": [
|
||||||
|
{
|
||||||
|
"index": 281474976710655,
|
||||||
|
"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
|
||||||
|
"e6e8db3be6854c475621e007a5dc",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710654,
|
||||||
|
"secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
|
||||||
|
"8b4b5bec0c4b872abeba4cb8964",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710653,
|
||||||
|
"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
|
||||||
|
"cbf9cd7c043a7d6456b7fc275ad8",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710652,
|
||||||
|
"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
|
||||||
|
"e9b506fd4998a51d54502e99116",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710651,
|
||||||
|
"secret": "c65716add7aa98ba7acb236352d665cab173" +\
|
||||||
|
"45fe45b55fb879ff80e6bd0c41dd",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710650,
|
||||||
|
"secret": "969660042a28f32d9be17344e09374b37996" +\
|
||||||
|
"2d03db1574df5a8a5a47e19ce3f2",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710649,
|
||||||
|
"secret": "e7971de736e01da8ed58b94c2fc216cb1d" +\
|
||||||
|
"ca9e326f3a96e7194fe8ea8af6c0a3",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710648,
|
||||||
|
"secret": "05cde6323d949933f7f7b78776bcc1ea6d" +\
|
||||||
|
"9b31447732e3802e1f7ac44b650e17",
|
||||||
|
"successful": False
|
||||||
|
}
|
||||||
|
]
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "insert_secret #8 incorrect",
|
||||||
|
"inserts": [
|
||||||
|
{
|
||||||
|
"index": 281474976710655,
|
||||||
|
"secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
|
||||||
|
"e6e8db3be6854c475621e007a5dc",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710654,
|
||||||
|
"secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
|
||||||
|
"8b4b5bec0c4b872abeba4cb8964",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710653,
|
||||||
|
"secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
|
||||||
|
"cbf9cd7c043a7d6456b7fc275ad8",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710652,
|
||||||
|
"secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
|
||||||
|
"e9b506fd4998a51d54502e99116",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710651,
|
||||||
|
"secret": "c65716add7aa98ba7acb236352d665cab173" +\
|
||||||
|
"45fe45b55fb879ff80e6bd0c41dd",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710650,
|
||||||
|
"secret": "969660042a28f32d9be17344e09374b37996" +\
|
||||||
|
"2d03db1574df5a8a5a47e19ce3f2",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710649,
|
||||||
|
"secret": "a5a64476122ca0925fb344bdc1854c1c0a" +\
|
||||||
|
"59fc614298e50a33e331980a220f32",
|
||||||
|
"successful": True
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"index": 281474976710648,
|
||||||
|
"secret": "a7efbc61aac46d34f77778bac22c8a20c6" +\
|
||||||
|
"a46ca460addc49009bda875ec88fa4",
|
||||||
|
"successful": False
|
||||||
|
}
|
||||||
|
]
|
||||||
|
}
|
||||||
|
]
|
||||||
|
|
||||||
|
for test in tests:
|
||||||
|
old_receiver = None
|
||||||
|
receiver = None
|
||||||
|
for insert in test["inserts"]:
|
||||||
|
old_receiver = receiver
|
||||||
|
receiver = RevocationStore()
|
||||||
|
secret = bytes.fromhex(insert["secret"])
|
||||||
|
if not insert["successful"]:
|
||||||
|
receiver.set_index(old_receiver.index)
|
||||||
|
receiver.buckets = old_receiver.buckets
|
||||||
|
secret = secret[::-1]
|
||||||
|
|
||||||
|
err = receiver.add_next_entry(secret)
|
||||||
|
if isinstance(err, str):
|
||||||
|
if insert["successful"]:
|
||||||
|
raise Exception("Failed ({}): error was received but it shouldn't: {}".format(test["name"], err))
|
||||||
|
else:
|
||||||
|
if not insert["successful"]:
|
||||||
|
raise Exception("Failed ({}): error wasn't received".format(test["name"]))
|
||||||
|
|
||||||
|
print("Passed ({})".format(test["name"]))
|
||||||
|
|
|
||||||
Loading…
Add table
Reference in a new issue