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blockchainethereumsmart-contractssoliditysecurityprogram-analysissecurity-analysissymbolic-execution
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91 lines
1.9 KiB
91 lines
1.9 KiB
import pytest
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from mythril.laser.ethereum.state.calldata import ConcreteCalldata, SymbolicCalldata
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from mythril.laser.smt import Solver, symbol_factory
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from z3 import sat, unsat
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from z3.z3types import Z3Exception
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from mock import MagicMock
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uninitialized_test_data = [
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([]), # Empty concrete calldata
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([1, 4, 5, 3, 4, 72, 230, 53]), # Concrete calldata
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]
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@pytest.mark.parametrize("starting_calldata", uninitialized_test_data)
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def test_concrete_calldata_uninitialized_index(starting_calldata):
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# Arrange
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calldata = ConcreteCalldata(0, starting_calldata)
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# Act
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value = calldata[100]
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value2 = calldata.get_word_at(200)
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# Assert
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assert value == 0
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assert value2 == 0
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def test_concrete_calldata_calldatasize():
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# Arrange
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calldata = ConcreteCalldata(0, [1, 4, 7, 3, 7, 2, 9])
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solver = Solver()
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# Act
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solver.check()
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model = solver.model()
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result = model.eval(calldata.calldatasize.raw)
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# Assert
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assert result == 7
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def test_concrete_calldata_constrain_index():
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# Arrange
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calldata = ConcreteCalldata(0, [1, 4, 7, 3, 7, 2, 9])
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solver = Solver()
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# Act
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value = calldata[2]
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constraint = value == 3
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solver.add([constraint])
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result = solver.check()
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# Assert
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assert str(result) == "unsat"
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def test_symbolic_calldata_constrain_index():
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# Arrange
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calldata = SymbolicCalldata(0)
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solver = Solver()
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# Act
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value = calldata[51]
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constraints = [value == 1, calldata.calldatasize == 50]
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solver.add(constraints)
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result = solver.check()
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# Assert
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assert str(result) == "unsat"
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def test_symbolic_calldata_equal_indices():
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calldata = SymbolicCalldata(0)
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index_a = symbol_factory.BitVecSym("index_a", 256)
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index_b = symbol_factory.BitVecSym("index_b", 256)
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# Act
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a = calldata[index_a]
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b = calldata[index_b]
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s = Solver()
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s.append(index_a == index_b)
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s.append(a != b)
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# Assert
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assert unsat == s.check()
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