mirror of https://github.com/ConsenSys/mythril
blockchainethereumsmart-contractssoliditysecurityprogram-analysissecurity-analysissymbolic-execution
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
2.2 KiB
67 lines
2.2 KiB
from mythril.ether import evm
|
|
from mythril.ether.contractstorage import get_persistent_storage
|
|
from mythril.disassembler.disassembly import Disassembly
|
|
from mythril.rpc.client import EthJsonRpc
|
|
from mythril.disassembler.callgraph import generate_callgraph
|
|
import os
|
|
|
|
|
|
contract_storage = get_persistent_storage()
|
|
contract_keys = list(contract_storage.contracts)
|
|
homestead = EthJsonRpc()
|
|
|
|
# Iterate over all contracts in the database
|
|
|
|
for k in contract_keys:
|
|
|
|
contract = contract_storage.contracts[k]
|
|
|
|
# Run each contract in the PyEthereum EVM trace to check whether DELEGATECALL is reached
|
|
# To execute the fallback function, we don't provide any input data
|
|
|
|
ret = evm.trace(contract.code)
|
|
|
|
if 'DELEGATECALL' in ret:
|
|
|
|
print("DELEGATECALL in fallback function: Contract 0x" + k.hex())
|
|
|
|
# contract.get_xrefs() should contain the delegateCall() target (library contract)
|
|
|
|
xrefs = contract.get_xrefs()
|
|
|
|
'''
|
|
from here on are many different options!
|
|
|
|
- trace functions in the referenced library contracts and look for SSTORE operations
|
|
- deploy the contract on testrpc or testnet and trigger functions using RPC
|
|
--> see class mythril.rpc.client.EthJsonRpc
|
|
|
|
For this example, we'll simply check if the library contract contains the initWallet() function
|
|
If it does, we save the disassembly and callgraph for further analysis
|
|
|
|
'''
|
|
|
|
for xref in xrefs:
|
|
code = homestead.eth_getCode(xref)
|
|
|
|
disassembly = Disassembly(code)
|
|
|
|
if contract.matches_expression("func#initWallet(address[],uint256,uint256)#"):
|
|
print ("initWallet() in referenced library contract: " + xref)
|
|
|
|
# Save list of contracts that forward calls to this library contract
|
|
|
|
cwd = os.getcwd()
|
|
|
|
with open("contracts_calling_" + xref + ".txt", "w") as f:
|
|
addresses = contract_storage.instance_lists[k].addresses
|
|
|
|
f.write("\n".join(addresses))
|
|
|
|
easm = disassembly.get_easm()
|
|
|
|
with open("library_" + xref + ".easm", "w") as f:
|
|
f.write(easm)
|
|
|
|
generate_callgraph(disassembly, os.path.join(cwd, "library_" + xref))
|
|
|
|
|