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mythril
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Security analysis tool for EVM bytecode. Supports smart contracts built for Ethereum, Hedera, Quorum, Vechain, Roostock, Tron and other EVM-compatible blockchains.
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mythril/tests/laser/Precompiles/test_mod_exp.py

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Add the rest of the precompiles (#990) * Support modular exponentiation for concrete data * Add elliptic curve operations * Fix type hints and refactor code * Support usage of the rest of the native contracts * Remove unused imports * Add tests for elliptic curve functions * Use a constant for native functions count * Update py_ecc version * Use PRECOMPILE_COUNT over hardcoded value * Use shortened list comprehensives * Clean up imports * Use precompile count in checking precompile calls * Refactor code
5 years ago
import pytest
from eth_utils import decode_hex
from mythril.laser.ethereum.natives import mod_exp
from ethereum.utils import big_endian_to_int
EIP198_VECTOR_A = decode_hex(
"0000000000000000000000000000000000000000000000000000000000000001"
"0000000000000000000000000000000000000000000000000000000000000020"
"0000000000000000000000000000000000000000000000000000000000000020"
"03"
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2e"
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f"
)
EIP198_VECTOR_B = decode_hex(
"0000000000000000000000000000000000000000000000000000000000000000"
"0000000000000000000000000000000000000000000000000000000000000020"
"0000000000000000000000000000000000000000000000000000000000000020"
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2e"
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f"
)
EIP198_VECTOR_C = decode_hex(
"0000000000000000000000000000000000000000000000000000000000000001"
"0000000000000000000000000000000000000000000000000000000000000002"
"0000000000000000000000000000000000000000000000000000000000000020"
"03"
"ffff"
"8000000000000000000000000000000000000000000000000000000000000000"
"07"
)
EIP198_VECTOR_D = decode_hex(
"0000000000000000000000000000000000000000000000000000000000000001"
"0000000000000000000000000000000000000000000000000000000000000002"
"0000000000000000000000000000000000000000000000000000000000000020"
"03"
"ffff"
"80"
)
@pytest.mark.parametrize(
"data,expected",
(
(EIP198_VECTOR_A, 1),
(EIP198_VECTOR_B, 0),
(
EIP198_VECTOR_C,
26689440342447178617115869845918039756797228267049433585260346420242739014315,
),
(
EIP198_VECTOR_D,
26689440342447178617115869845918039756797228267049433585260346420242739014315,
),
),
)
def test_modexp_result(data, expected):
actual = mod_exp(data)
assert big_endian_to_int(actual) == expected