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Copy pathtest_signature_checker_fuzz.py
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from wake.testing import *
from wake.testing.fuzzing import *
from pytypes.tests.SignatureCheckerMock import SignatureCheckerMock, ERC1271SignatureChecker
class SignatureCheckerFuzzTest(FuzzTest):
_signature_checker: SignatureCheckerMock
_erc1271_signature_checker: ERC1271SignatureChecker
_signer: Account
def pre_sequence(self) -> None:
self._signature_checker = SignatureCheckerMock.deploy()
self._erc1271_signature_checker = ERC1271SignatureChecker.deploy()
self._signer = Account.new()
@flow()
def flow_check_signature(self) -> None:
data = random_bytes(0, 1000)
hash = keccak256(data)
signature = self._signer.sign_hash(hash)
r = signature[:32]
s = signature[32:64]
v = signature[64]
assert self._signature_checker.isValidSignatureNow(self._signer, hash, signature)
assert self._signature_checker.isValidSignatureNow_(
self._signer,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
)
assert self._signature_checker.isValidSignatureNow__(self._signer, hash, v, r, s)
assert self._signature_checker.isValidSignatureNowCalldata(self._signer, hash, signature)
# erc1271
assert self._signature_checker.isValidSignatureNow(self._erc1271_signature_checker, hash, signature, from_=self._signer)
assert self._signature_checker.isValidSignatureNow_(
self._erc1271_signature_checker,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
from_=self._signer,
)
assert self._signature_checker.isValidSignatureNow__(self._erc1271_signature_checker, hash, v, r, s, from_=self._signer)
assert self._signature_checker.isValidSignatureNowCalldata(self._erc1271_signature_checker, hash, signature, from_=self._signer)
assert not self._signature_checker.isValidSignatureNow(self._erc1271_signature_checker, hash, signature)
assert not self._signature_checker.isValidSignatureNow_(
self._erc1271_signature_checker,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
)
assert not self._signature_checker.isValidSignatureNow__(self._erc1271_signature_checker, hash, v, r, s)
assert not self._signature_checker.isValidSignatureNowCalldata(self._erc1271_signature_checker, hash, signature)
@flow(weight=40)
def flow_check_signature_invalid_random(self, signer: Address, hash: bytes32) -> None:
signature = random_bytes(65)
r = signature[:32]
s = signature[32:64]
v = signature[64]
assert not self._signature_checker.isValidSignatureNow(signer, hash, signature)
assert not self._signature_checker.isValidSignatureNow_(
self._signer,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
)
assert not self._signature_checker.isValidSignatureNow__(signer, hash, v, r, s)
assert not self._signature_checker.isValidSignatureNowCalldata(signer, hash, signature)
assert not self._signature_checker.isValidSignatureNow(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidSignatureNow_(
self._erc1271_signature_checker,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
from_=signer,
)
assert not self._signature_checker.isValidSignatureNow__(self._erc1271_signature_checker, hash, v, r, s, from_=signer)
assert not self._signature_checker.isValidSignatureNowCalldata(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNow(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNow_(
self._erc1271_signature_checker,
hash,
r,
s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:],
from_=signer,
)
assert not self._signature_checker.isValidERC1271SignatureNow__(self._erc1271_signature_checker, hash, v, r, s, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNowCalldata(self._erc1271_signature_checker, hash, signature, from_=signer)
@flow(weight=60)
def flow_check_signature_invalid_modified(self) -> None:
signer = self._signer.address
data = random_bytes(0, 1000)
hash = bytearray(keccak256(data))
signature = bytearray(self._signer.sign_hash(hash))
original_v = None
x = random_int(0, 2)
if x == 0:
signer_bytes = bytearray(bytes(signer))
pos = random_int(0, 19)
new_byte = random_bytes(1)[0]
while signer_bytes[pos] == new_byte:
new_byte = random_bytes(1)[0]
signer_bytes[pos] = new_byte
signer = Address(signer_bytes.hex())
elif x == 1:
pos = random_int(0, 31)
new_byte = random_bytes(1)[0]
while hash[pos] == new_byte:
new_byte = random_bytes(1)[0]
hash[pos] = new_byte
elif x == 2:
pos = random_int(0, 64)
if pos == 64:
original_v = signature[64]
new_byte = random_bytes(1)[0]
while signature[pos] == new_byte:
new_byte = random_bytes(1)[0]
signature[pos] = new_byte
else:
assert False
r = signature[:32]
s = signature[32:64]
v = signature[64]
if original_v is None:
# v was not modified
vs = s if v == 27 else (s[0] | 0x80).to_bytes(1, "big") + s[1:]
else:
# v was modified
vs = s if original_v == 28 else (s[0] | 0x80).to_bytes(1, "big") + s[1:]
assert not self._signature_checker.isValidSignatureNow(signer, hash, signature)
assert not self._signature_checker.isValidSignatureNow_(
signer,
hash,
r,
vs,
)
assert not self._signature_checker.isValidSignatureNow__(signer, hash, v, r, s)
assert not self._signature_checker.isValidSignatureNowCalldata(signer, hash, signature)
# erc1271
assert not self._signature_checker.isValidSignatureNow(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidSignatureNow_(
self._erc1271_signature_checker,
hash,
r,
vs,
from_=signer,
)
assert not self._signature_checker.isValidSignatureNow__(self._erc1271_signature_checker, hash, v, r, s, from_=signer)
assert not self._signature_checker.isValidSignatureNowCalldata(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNow(self._erc1271_signature_checker, hash, signature, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNow_(
self._erc1271_signature_checker,
hash,
r,
vs,
from_=signer,
)
assert not self._signature_checker.isValidERC1271SignatureNow__(self._erc1271_signature_checker, hash, v, r, s, from_=signer)
assert not self._signature_checker.isValidERC1271SignatureNowCalldata(self._erc1271_signature_checker, hash, signature, from_=signer)
@default_chain.connect()
def test_signature_checker():
SignatureCheckerFuzzTest().run(10, 20)