mirror of https://github.com/crytic/slither
Josselin Feist
2 years ago
commit
200c5ce875
@ -1,8 +1,13 @@ |
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from typing import Tuple, List, Type |
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|
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from slither_my_plugin.detectors.example import Example |
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from slither.detectors.abstract_detector import AbstractDetector |
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from slither.printers.abstract_printer import AbstractPrinter |
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|
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def make_plugin(): |
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def make_plugin() -> Tuple[List[Type[AbstractDetector]], List[Type[AbstractPrinter]]]: |
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plugin_detectors = [Example] |
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plugin_printers = [] |
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plugin_printers: List[Type[AbstractPrinter]] = [] |
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return plugin_detectors, plugin_printers |
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@ -0,0 +1,15 @@ |
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#!/usr/bin/env bash |
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### Test path filtering across POSIX and Windows |
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solc-select use 0.8.0 |
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slither "tests/test_path_filtering/test_path_filtering.sol" --config "tests/test_path_filtering/slither.config.json" > "output.txt" 2>&1 |
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if ! grep -q "0 result(s) found" "output.txt" |
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then |
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echo "Path filtering across POSIX and Windows failed" |
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rm output.txt |
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exit 5 |
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else |
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rm output.txt |
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fi |
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@ -0,0 +1,72 @@ |
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""" |
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Module detecting EIP-2612 domain separator collision |
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""" |
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from typing import Union, List |
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from slither.core.declarations import Function |
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from slither.core.solidity_types.elementary_type import ElementaryType |
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from slither.core.variables.state_variable import StateVariable |
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from slither.detectors.abstract_detector import AbstractDetector, DetectorClassification |
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from slither.utils.function import get_function_id |
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|
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class DomainSeparatorCollision(AbstractDetector): |
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""" |
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Domain separator collision |
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""" |
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ARGUMENT = "domain-separator-collision" |
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HELP = "Detects ERC20 tokens that have a function whose signature collides with EIP-2612's DOMAIN_SEPARATOR()" |
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IMPACT = DetectorClassification.MEDIUM |
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CONFIDENCE = DetectorClassification.HIGH |
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WIKI = ( |
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"https://github.com/crytic/slither/wiki/Detector-Documentation#domain-separator-collision" |
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) |
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WIKI_TITLE = "Domain separator collision" |
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WIKI_DESCRIPTION = "An ERC20 token has a function whose signature collides with EIP-2612's DOMAIN_SEPARATOR(), causing unanticipated behavior for contracts using `permit` functionality." |
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|
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# region wiki_exploit_scenario |
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WIKI_EXPLOIT_SCENARIO = """ |
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```solidity |
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contract Contract{ |
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function some_collisions() external() {} |
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} |
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``` |
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`some_collision` clashes with EIP-2612's DOMAIN_SEPARATOR() and will interfere with contract's using `permit`.""" |
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# endregion wiki_exploit_scenario |
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WIKI_RECOMMENDATION = "Remove or rename the function that collides with DOMAIN_SEPARATOR()." |
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def _detect(self): |
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domain_sig = get_function_id("DOMAIN_SEPARATOR()") |
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for contract in self.compilation_unit.contracts_derived: |
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if contract.is_erc20(): |
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funcs_and_vars: List[Union[Function, StateVariable]] = contract.functions_entry_points + contract.state_variables_entry_points # type: ignore |
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for func_or_var in funcs_and_vars: |
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# External/ public function names should not collide with DOMAIN_SEPARATOR() |
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hash_collision = ( |
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func_or_var.solidity_signature != "DOMAIN_SEPARATOR()" |
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and get_function_id(func_or_var.solidity_signature) == domain_sig |
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) |
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# DOMAIN_SEPARATOR() should return bytes32 |
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incorrect_return_type = func_or_var.solidity_signature == "DOMAIN_SEPARATOR()" |
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if incorrect_return_type: |
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if isinstance(func_or_var, Function): |
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incorrect_return_type = ( |
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not func_or_var.return_type |
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or func_or_var.return_type[0] != ElementaryType("bytes32") |
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) |
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else: |
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assert isinstance(func_or_var, StateVariable) |
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incorrect_return_type = func_or_var.type != ElementaryType("bytes32") |
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if hash_collision or incorrect_return_type: |
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info = [ |
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"The function signature of ", |
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func_or_var, |
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" collides with DOMAIN_SEPARATOR and should be renamed or removed.\n", |
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] |
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res = self.generate_result(info) |
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return [res] |
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return [] |
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@ -1,21 +1,23 @@ |
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from typing import List |
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from slither.slithir.operations.lvalue import OperationWithLValue |
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from slither.core.solidity_types.elementary_type import ElementaryType |
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class TmpNewElementaryType(OperationWithLValue): |
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def __init__(self, new_type, lvalue): |
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def __init__(self, new_type: ElementaryType, lvalue): |
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assert isinstance(new_type, ElementaryType) |
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super().__init__() |
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self._type = new_type |
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self._type: ElementaryType = new_type |
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self._lvalue = lvalue |
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@property |
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def read(self): |
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def read(self) -> List: |
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return [] |
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@property |
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def type(self): |
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def type(self) -> ElementaryType: |
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return self._type |
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def __str__(self): |
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def __str__(self) -> str: |
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return f"{self.lvalue} = new {self._type}" |
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@ -0,0 +1,3 @@ |
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# Slither doctor |
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Slither doctor is a tool designed to troubleshoot running Slither on a project. |
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@ -0,0 +1,37 @@ |
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import argparse |
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from crytic_compile import cryticparser |
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from slither.tools.doctor.utils import report_section |
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from slither.tools.doctor.checks import ALL_CHECKS |
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def parse_args() -> argparse.Namespace: |
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""" |
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Parse the underlying arguments for the program. |
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:return: Returns the arguments for the program. |
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""" |
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parser = argparse.ArgumentParser( |
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description="Troubleshoot running Slither on your project", |
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usage="slither-doctor project", |
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) |
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parser.add_argument("project", help="The codebase to be tested.") |
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# Add default arguments from crytic-compile |
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cryticparser.init(parser) |
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return parser.parse_args() |
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def main(): |
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args = parse_args() |
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kwargs = vars(args) |
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for check in ALL_CHECKS: |
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with report_section(check.title): |
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check.function(**kwargs) |
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if __name__ == "__main__": |
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main() |
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@ -0,0 +1,18 @@ |
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from typing import Callable, List |
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from dataclasses import dataclass |
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from slither.tools.doctor.checks.platform import compile_project, detect_platform |
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from slither.tools.doctor.checks.versions import show_versions |
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@dataclass |
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class Check: |
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title: str |
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function: Callable[..., None] |
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ALL_CHECKS: List[Check] = [ |
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Check("Software versions", show_versions), |
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Check("Project platform", detect_platform), |
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Check("Project compilation", compile_project), |
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] |
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@ -0,0 +1,59 @@ |
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import logging |
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from pathlib import Path |
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from crytic_compile import crytic_compile |
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from slither.tools.doctor.utils import snip_section |
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from slither.utils.colors import red, yellow, green |
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def detect_platform(project: str, **kwargs) -> None: |
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path = Path(project) |
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if path.is_file(): |
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print( |
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yellow( |
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f"{project!r} is a file. Using it as target will manually compile your code with solc and _not_ use a compilation framework. Is that what you meant to do?" |
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) |
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) |
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return |
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print(f"Trying to detect project type for {project!r}") |
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supported_platforms = crytic_compile.get_platforms() |
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skip_platforms = {"solc", "solc-json", "archive", "standard", "etherscan"} |
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detected_platforms = { |
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platform.NAME: platform.is_supported(project, **kwargs) |
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for platform in supported_platforms |
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if platform.NAME.lower() not in skip_platforms |
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} |
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platform_qty = len([platform for platform, state in detected_platforms.items() if state]) |
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print("Is this project using...") |
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for platform, state in detected_platforms.items(): |
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print(f" => {platform + '?':<15}{state and green('Yes') or red('No')}") |
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print() |
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if platform_qty == 0: |
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print(red("No platform was detected! This doesn't sound right.")) |
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print( |
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yellow( |
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"Are you trying to analyze a folder with standalone solidity files, without using a compilation framework? If that's the case, then this is okay." |
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) |
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) |
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elif platform_qty > 1: |
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print(red("More than one platform was detected! This doesn't sound right.")) |
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print( |
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red("Please use `--compile-force-framework` in Slither to force the correct framework.") |
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) |
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else: |
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print(green("A single platform was detected."), yellow("Is it the one you expected?")) |
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def compile_project(project: str, **kwargs): |
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print("Invoking crytic-compile on the project, please wait...") |
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try: |
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crytic_compile.CryticCompile(project, **kwargs) |
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except Exception as e: # pylint: disable=broad-except |
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with snip_section("Project compilation failed :( The following error was generated:"): |
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logging.exception(e) |
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@ -0,0 +1,59 @@ |
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from importlib import metadata |
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import json |
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from typing import Optional |
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import urllib |
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from packaging.version import parse, LegacyVersion, Version |
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from slither.utils.colors import yellow, green |
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def get_installed_version(name: str) -> Optional[LegacyVersion | Version]: |
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try: |
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return parse(metadata.version(name)) |
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except metadata.PackageNotFoundError: |
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return None |
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|
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def get_github_version(name: str) -> Optional[LegacyVersion | Version]: |
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try: |
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with urllib.request.urlopen( |
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f"https://api.github.com/repos/crytic/{name}/releases/latest" |
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) as response: |
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text = response.read() |
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data = json.loads(text) |
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return parse(data["tag_name"]) |
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except: # pylint: disable=bare-except |
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return None |
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def show_versions(**_kwargs) -> None: |
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versions = { |
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"Slither": (get_installed_version("slither-analyzer"), get_github_version("slither")), |
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"crytic-compile": ( |
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get_installed_version("crytic-compile"), |
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get_github_version("crytic-compile"), |
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), |
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"solc-select": (get_installed_version("solc-select"), get_github_version("solc-select")), |
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} |
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outdated = { |
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name |
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for name, (installed, latest) in versions.items() |
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if not installed or not latest or latest > installed |
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} |
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for name, (installed, latest) in versions.items(): |
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color = yellow if name in outdated else green |
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print(f"{name + ':':<16}{color(installed or 'N/A'):<16} (latest is {latest or 'Unknown'})") |
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if len(outdated) > 0: |
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print() |
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print( |
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yellow( |
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f"Please update {', '.join(outdated)} to the latest release before creating a bug report." |
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) |
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) |
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else: |
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print() |
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print(green("Your tools are up to date.")) |
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@ -0,0 +1,28 @@ |
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from contextlib import contextmanager |
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import logging |
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from typing import Optional |
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from slither.utils.colors import bold, yellow, red |
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|
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@contextmanager |
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def snip_section(message: Optional[str]) -> None: |
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if message: |
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print(red(message), end="\n\n") |
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print(yellow("---- snip 8< ----")) |
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yield |
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print(yellow("---- >8 snip ----")) |
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|
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@contextmanager |
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def report_section(title: str) -> None: |
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print(bold(f"## {title}"), end="\n\n") |
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try: |
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yield |
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except Exception as e: # pylint: disable=broad-except |
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with snip_section( |
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"slither-doctor failed unexpectedly! Please report this on the Slither GitHub issue tracker, and include the output below:" |
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): |
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logging.exception(e) |
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finally: |
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print(end="\n\n") |
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@ -1,28 +1,35 @@ |
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from decimal import Decimal |
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from fractions import Fraction |
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from typing import Union |
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from slither.exceptions import SlitherError |
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|
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def convert_string_to_int(val: Union[str, int]) -> int: |
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def convert_string_to_fraction(val: Union[str, int]) -> Fraction: |
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if isinstance(val, int): |
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return val |
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return Fraction(val) |
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if val.startswith(("0x", "0X")): |
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return int(val, 16) |
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return Fraction(int(val, 16)) |
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|
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# Fractions do not support underscore separators (on Python <3.11) |
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val = val.replace("_", "") |
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|
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if "e" in val or "E" in val: |
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base, expo = val.split("e") if "e" in val else val.split("E") |
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base, expo = Decimal(base), int(expo) |
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base, expo = Fraction(base), int(expo) |
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# The resulting number must be < 2**256-1, otherwise solc |
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# Would not be able to compile it |
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# 10**77 is the largest exponent that fits |
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# See https://github.com/ethereum/solidity/blob/9e61f92bd4d19b430cb8cb26f1c7cf79f1dff380/libsolidity/ast/Types.cpp#L1281-L1290 |
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if expo > 77: |
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if base != Decimal(0): |
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if base != Fraction(0): |
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raise SlitherError( |
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f"{base}e{expo} is too large to fit in any Solidity integer size" |
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) |
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return 0 |
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return int(Decimal(base) * Decimal(10**expo)) |
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return Fraction(base) * Fraction(10**expo) |
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|
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return Fraction(val) |
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|
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return int(Decimal(val)) |
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|
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def convert_string_to_int(val: Union[str, int]) -> int: |
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return int(convert_string_to_fraction(val)) |
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