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trezor-firmware/core/tests/test_apps.monero.clsag.py

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xmr: major protocol upgrade, CLSAG support added - CLSAG signature scheme added - type hints added xmr: optimize protocol, send only required data - real_out_additional_tx_keys contains only one element as nothing more is needed during signature - only src_entr.outputs[index] is HMACed and always present. Other outputs are present only if needed which reduces comm and CPU overhead. - getting rid of subaddresses dictionary (memory requirements), now subaddr indices are present per source entry so keys are computed when needed xmr: prepare for permutation sending removal, specify index - specify source entry ordering index prior sorting by key images as original HMAC keys are generated based on these. - permutation checked just by valid HMACs, size of the set, key image sort order - sending permutation is now deprecated, will be removed in the following protocol versions - more strict state transition checks, guard strict check with respect to steps ordering
2020-04-09 15:16:48 +00:00
from common import *
if not utils.BITCOIN_ONLY:
from apps.monero.xmr import crypto, mlsag
from apps.monero.xmr.serialize_messages.tx_ct_key import CtKey
from trezor.crypto import random
import ubinascii
class TmpKey:
def __init__(self, d, c):
self.dest = d
self.commitment = c
@unittest.skipUnless(not utils.BITCOIN_ONLY, "altcoin")
class TestMoneroClsag(unittest.TestCase):
def verify_clsag(self, msg, ss, sc1, sI, sD, pubs, C_offset):
n = len(pubs)
c = crypto.new_scalar()
D_8 = crypto.new_point()
tmp_bf = bytearray(32)
C_offset_bf = crypto.encodepoint(C_offset)
crypto.sc_copy(c, sc1)
crypto.point_mul8_into(D_8, sD)
hsh_P = crypto.get_keccak() # domain, I, D, P, C, C_offset
hsh_C = crypto.get_keccak() # domain, I, D, P, C, C_offset
hsh_P.update(mlsag._HASH_KEY_CLSAG_AGG_0)
hsh_C.update(mlsag._HASH_KEY_CLSAG_AGG_1)
def hsh_PC(x):
hsh_P.update(x)
hsh_C.update(x)
for x in pubs:
hsh_PC(x.dest)
for x in pubs:
hsh_PC(x.commitment)
hsh_PC(crypto.encodepoint_into(tmp_bf, sI))
hsh_PC(crypto.encodepoint_into(tmp_bf, sD))
hsh_PC(C_offset_bf)
mu_P = crypto.decodeint(hsh_P.digest())
mu_C = crypto.decodeint(hsh_C.digest())
c_to_hash = crypto.get_keccak() # domain, P, C, C_offset, message, L, R
c_to_hash.update(mlsag._HASH_KEY_CLSAG_ROUND)
for i in range(len(pubs)):
c_to_hash.update(pubs[i].dest)
for i in range(len(pubs)):
c_to_hash.update(pubs[i].commitment)
c_to_hash.update(C_offset_bf)
c_to_hash.update(msg)
c_p = crypto.new_scalar()
c_c = crypto.new_scalar()
L = crypto.new_point()
R = crypto.new_point()
tmp_pt = crypto.new_point()
i = 0
while i < n:
crypto.sc_mul_into(c_p, mu_P, c)
crypto.sc_mul_into(c_c, mu_C, c)
C_P = crypto.point_sub(
crypto.decodepoint_into(tmp_pt, pubs[i].commitment), C_offset
)
crypto.add_keys2_into(
L, ss[i], c_p, crypto.decodepoint_into(tmp_pt, pubs[i].dest)
)
crypto.point_add_into(L, L, crypto.scalarmult_into(tmp_pt, C_P, c_c))
HP = crypto.hash_to_point(pubs[i].dest)
crypto.add_keys3_into(R, ss[i], HP, c_p, sI)
crypto.point_add_into(R, R, crypto.scalarmult_into(tmp_pt, D_8, c_c))
chasher = c_to_hash.copy()
chasher.update(crypto.encodepoint_into(tmp_bf, L))
chasher.update(crypto.encodepoint_into(tmp_bf, R))
crypto.decodeint_into(c, chasher.digest())
i += 1
res = crypto.sc_sub(c, sc1)
if not crypto.sc_eq(res, crypto.sc_0()):
raise ValueError("Signature error")
def gen_clsag_test(self, ring_size=11, index=None):
res = self.gen_clsag_sig(ring_size=11, index=index)
msg, scalars, sc1, sI, sD, ring2, Cp = res
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def gen_clsag_sig(self, ring_size=11, index=None):
msg = random.bytes(32)
amnt = crypto.sc_init(random.uniform(0xFFFFFF) + 12)
priv = crypto.random_scalar()
msk = crypto.random_scalar()
alpha = crypto.random_scalar()
P = crypto.scalarmult_base(priv)
C = crypto.add_keys2(msk, amnt, crypto.xmr_H())
Cp = crypto.add_keys2(alpha, amnt, crypto.xmr_H())
ring = []
for i in range(ring_size - 1):
tk = TmpKey(
crypto.encodepoint(crypto.scalarmult_base(crypto.random_scalar())),
crypto.encodepoint(crypto.scalarmult_base(crypto.random_scalar())),
)
ring.append(tk)
index = index if index is not None else random.uniform(len(ring))
ring.insert(index, TmpKey(crypto.encodepoint(P), crypto.encodepoint(C)))
ring2 = list(ring)
mg_buffer = []
self.assertTrue(
crypto.point_eq(
crypto.scalarmult_base(priv), crypto.decodepoint(ring[index].dest)
)
)
self.assertTrue(
crypto.point_eq(
crypto.scalarmult_base(crypto.sc_sub(msk, alpha)),
crypto.point_sub(crypto.decodepoint(ring[index].commitment), Cp),
)
)
mlsag.generate_clsag_simple(
msg, ring, CtKey(priv, msk), alpha, Cp, index, mg_buffer,
)
sD = crypto.decodepoint(mg_buffer[-1])
sc1 = crypto.decodeint(mg_buffer[-2])
scalars = [crypto.decodeint(x) for x in mg_buffer[1:-2]]
H = crypto.new_point()
sI = crypto.new_point()
crypto.hash_to_point_into(H, crypto.encodepoint(P))
crypto.scalarmult_into(sI, H, priv) # I = p*H
return msg, scalars, sc1, sI, sD, ring2, Cp
def verify_monero_generated(self, clsag):
msg = ubinascii.unhexlify(clsag["msg"])
sI = crypto.decodepoint(ubinascii.unhexlify(clsag["sI"]))
sD = crypto.decodepoint(ubinascii.unhexlify(clsag["sD"]))
sc1 = crypto.decodeint(ubinascii.unhexlify(clsag["sc1"]))
Cout = crypto.decodepoint(ubinascii.unhexlify(clsag["cout"]))
scalars = [crypto.decodeint(ubinascii.unhexlify(x)) for x in clsag["ss"]]
ring = []
for e in clsag["ring"]:
ring.append(TmpKey(ubinascii.unhexlify(e[0]), ubinascii.unhexlify(e[1])))
self.verify_clsag(msg, scalars, sc1, sI, sD, ring, Cout)
def test_monero_generated_clsag_01(self):
clsag = {
"msg": "0100000000000000000000000000000000000000000000000000000000000000",
"cout": "8e3afb92d8ae1264417489259e38f7205a62baea86ae9592cd91988b9cc48102",
"sI": "a1c7f4a316ddd16374fe495d402be60566047ae5a1352554e98ebff118705303",
"sD": "cd80b5c7f3f597de6e20bcef669a4ba9eb3eb89ead12ab1c24c92acd609afcb2",
"sc1": "cf4f48ed60771d4e8d02e9e0af37281ceeb66573bd528ac256a7e17794a75602",
"ss":
["aaeffa564b5b0ff1e4ed72c9b595cd0241ac64eeb41b902a35688e369922d704"
, "1defc134a853252d734d19b29d8f2fabc85a8ae24ebcf8f050d4daf8a335e901"
, "cdf9ac576f0c7ceb7eb22c1a1254a801d0d2915e59870be8b1ab68cd1281120d"
, "d1973493d8224aaa9732878b9a88d448ea16185f94e5bafd82816277682fa108"
, "a130e076845e512687575942bf3694bcb44eb19eb1181af9a1fc2254949b7c0f"
, "26f5b6ea154d6bd4a969c742563d75f1bfcd5ded3af78669e45ba95e76c48605"
, "5b695d3be46b826fd11e043028dee2aa25cf36910e86537fcd1cd3f5cb49650e"
, "37e811ebb4a2b9c35556b4af911a03a93468f599956c034092c3ece9e1169208"
, "a361ceec9aacd65da6d3e686fbcd0c1aef26096321be7f01653157ee6096a201"
, "f9b762ef1df69bb12ca76a97dce11f7840b8ec63c3dc2683f7ae71cb79c49103"
, "ea010fa6a35f3bd3d7899a7a2a8df4d3ef9c9dfbbd56fe43ff5c7442821d3508"
]
, "ring": [
["241c0295b4c3a149e5ac7997963e125d0fc6cc8adad9349df3b01ff611936c87",
"3a24a4c418ccb2ceb83672d01534a73ff1e9f548937d5ddd7f1971c9b398868c"],
["ec432ccfbf730077cb2d8c59968e2796148a590eec7928ecf268d883ced0de5b",
"2973d6e9c27538fd0f7c003e014311e9403dcb6e7d86b66df65176a579943bda"],
["0cfeafc313a6a2e60110778d53d61fa1705e9049b8afba0f51c1127f6855c07f",
"ffa4d4c77202907832294243a96886920017b67fbe5b3800bcc1457c4a4a1ff0"],
["bd4eca22dc010a214524901b88bdda27e427217ff784c47520ee76743caba036",
"e07135f8398459133c2969184e70610b9b995f73e44acf54b6eaed6227e68bbc"],
["73c8d57d0128c99fc2ab0be8cee5fe5c1288b98e51822a6681846035fcc53fea",
"2987499fde3f4353013206d89fe2d7c6ad3cd9a66c9a36d17749e39112513572"],
["385c538901b79c6bd2ddea5191e808b1414c9dfdcaf424841d843dd788cb89ad",
"ec5f987fe138c6cb1d47ff75d77852b7c0a94ba1f0b93d22c0463f75986605bd"],
["fed06cb761745a6f087d1af13f84670ecbf1523d72b46e8bd0698d1cdfb398bc",
"5d81df981fb885f947b9404cb63cb06fe4e001be281f2bdfb3c638d54ec6e49e"],
["667d1edfb83a17bd81fcf7831362b6c9038f26340ee1fe56d41f62cb0b32e989",
"e9ceba97867b43cd5420c94fa61cc5f11e440e261df74dfc8b1c07ec4b13aa3c"],
["e1e76da5bd52fc065f9af40efde5f733f9673974d14c6af8d200d8576ac3a90d",
"97358d6ddad38b2707fb864bfcaaab935851af66d50bcbac569d159d740bdf71"],
["4fd5d0db88283c63905d5095a76b11a75337e43f403f8469175ba9c49741552e",
"af0ab85872a6355d5c82c1f9a2a41488146e19b272887a1f7385cc26bef3f1d8"],
["37e1a4c49a22340fa5ac2c22c1b7a891e7191cdc53911700a317c0d8b92bbf4e",
"5c89d29dad77de7d76ece8bb81c7c8cd15008f63c5a14ab1c984b3833e7bbce3"]
]
}
self.verify_monero_generated(clsag)
def test_monero_generated_clsag_02(self):
clsag = {
"msg": "0100000000000000000000000000000000000000000000000000000000000000",
"cout": "fdf2503d3217dbf73ababd16f5ab5a63d64c047db1d02b0888a50d2570f3a793",
"sI": "917fdd3086c056503ffdb1840f03c78d48bfe6d9d60b4efb194bd9798d03acaa",
"sD": "769d0ca9b272ac02c5efad7df6b5c00f2995c99ca80f4597136decba9a0dd36f",
"sc1": "fe5c7eb39a32d2aea12e6d127d847b72ea810bfbf3d5bbe23c40e7abdd12900e",
"ss":
["da2940c66cc2405032d959325c8804e216f76b36e71b2ae6b76417ed9c10a80a"
, "ca763505c2e5ebacf72098f8cba89ea6826aa448501f03d439c7a838a88bba0e"
, "b2eadee4c121e85b0c2a09d56c665ba19ee8ebc451f1e9e96cf72c874f945104"
, "5a79523fdc0df9a54ab3937c878bd5a02e62bff77efc338728deb060ecda4509"
, "dfadddc51866cde5206269270f44ca2f6350ca0b1328a968773fcacf57031502"
, "a964f3549a10fc8bdb2f8217df0e9b08e90477be19a665b94b73ce417622450b"
, "48e805427109268b04bf378c869501dbebb79c0cbe664bf7eb0ca222376d1c0f"
, "33f36d9a699e92a66d4b9fdf6c1123ae99701b117fbe8f0af9faec51e45eb409"
, "25ef746a03aaf59701d1d47ea3b9e9f092662cebc9d44902ce18e81cc5035f01"
, "2ba3022d4f9b57da7429499715592073f1608cf270318840a5fd3890bbf5950a"
, "8149ec0d965c9881d6a4adedca7d3c9090359dbfae56dbab526be102722aab09"
]
, "ring": [
["081b048be784e1ff6f3b7ebe602690c27723b5d9952405bcdcbed31d16125067",
"6090eccb73d2e1fc7bc7644a4fad04e5fe93d953a1258307c44d5b23cd636bf9"],
["e2f0f100f1634d7c7dd5a09bc6dd7ee53506d73536aa743e8ea049528e4cb2aa",
"632438f9aeda72eb9c6c434391cf9fa2f71788bea598a5d5729a5d502865932a"],
["6744197cfde37ad1901d518f112c0f4d820c23122a016949e300eec2ab88916c",
"1b251d5b32e22de29a4f99a0ed1de32754636175075e21b25d7283036eb85541"],
["0e86bb7ee0b4728f2fedde7ac5019b54de7b2bb19b44d1864e6346dac6c171ab",
"5a3c85e93890f802d4148140733dcdcd676353fce1bd774ce28034fc2ec00253"],
["1847ce49d9552651395b2fa80637c131a31036f0bfc5abb63526701cd1a32320",
"a9cb55bc24e6e1fb894c511f2edd4b7bda4c75a608657d952e85bab83ec98a52"],
["5c5d0b678f5045b0304e3c48027bd7e9ccaee1dac4449ed1f34b204868ca5651",
"badf83ccba38f2194f924a4f7fb7c2fd966b1e16c1fddeb3658033aa009febe0"],
["81961aa4c241a91d498d8f3057b31373d9fc72b6e7d7f98bf497e3dfe705eeaa",
"a0e632fbb801d6bce99ef97d7bb6acd945aff5cd7fab56c0e6fec6900a3babd7"],
["cbd89f10ddf152bd9c756d145ef4cda1d56a31f1e1936759bee04b7a8a815c76",
"8b835b8180f36e79ba79528e0d3401f439cc1c7f99e4bcfb3cb4aa2b60b1afc1"],
["a7bc55e955a825730f5dcdc3f8126717d7647cbca8a6b90e08b77269aeed3533",
"8da31e80698c9b5181b2e8d9773136083a34e3e72c92134d8201d9c368d89284"],
["a7902cec90d3f2de25c8ddc87075159fd00f219a51a1e7dcac17c2b8a91887e9",
"2b1e848b6649abefbd6b399504a169252358e7ff6bde8fa7a773b9cf0a167069"],
["9fc3d5fb7de8cfc59982f7b20f3f5c145ad191088e7f59c10908dc5d55863bee",
"b8de2bc9bb46d475007230a92af14afb6f9dd2804b5c31355a282b40ccdadc92"]
]
}
self.verify_monero_generated(clsag)
def test_clsag(self):
self.gen_clsag_test(ring_size=11, index=None)
self.gen_clsag_test(ring_size=11, index=None)
self.gen_clsag_test(ring_size=11, index=None)
self.gen_clsag_test(ring_size=11, index=0)
self.gen_clsag_test(ring_size=11, index=9)
self.gen_clsag_test(ring_size=11, index=10)
self.gen_clsag_test(ring_size=2, index=0)
def test_clsag_invalid_sI(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
sI = crypto.point_mul8(sI)
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def test_clsag_invalid_sD(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
sD = crypto.scalarmult_base(crypto.random_scalar())
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def test_clsag_invalid_P(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
ring2[5].dest = crypto.encodepoint(
crypto.point_mul8(crypto.decodepoint(ring2[5].dest))
)
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def test_clsag_invalid_P(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
ring2[5].commitment = crypto.encodepoint(
crypto.point_mul8(crypto.decodepoint(ring2[5].dest))
)
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def test_clsag_invalid_Cp(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
Cp = crypto.point_add(Cp, crypto.scalarmult_base(crypto.sc_init(1)))
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
def test_clsag_invalid_index(self):
res = self.gen_clsag_sig(ring_size=11, index=5)
msg, scalars, sc1, sI, sD, ring2, Cp = res
with self.assertRaises(ValueError):
ring2[5], ring2[6] = ring2[6], ring2[5]
self.verify_clsag(msg, scalars, sc1, sI, sD, ring2, Cp)
if __name__ == "__main__":
unittest.main()
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