Blockchain Audit自动化的代码审查工具 Smartcheck

refer to: https://github.com/smartdec/smartcheck

https://www.getsecureworld.com/blog/top-10-solidity-smart-contract-audit-tools/

安装

npm install @smartdec/smartcheck -g

使用

进入到项目目录。

smartcheck -p .

例如，对这个sol, 就

contract EtherStore {
    uint256 public withdrawalLimit = 1 ether;
    mapping(address => uint256) public lastWithdrawTime;
    mapping(address => uint256) public balances;

    // 存款
    function depositFunds() public payable {
        balances[msg.sender] += msg.value;
    }

    // 提款
    function withdrawFunds (uint256 _weiToWithdraw) public {
        require(balances[msg.sender] >= _weiToWithdraw);
        // limit the withdrawal
        require(_weiToWithdraw <= withdrawalLimit);
        // limit the time allowed to withdraw
        require(now >= lastWithdrawTime[msg.sender] + 1 weeks);
        require(msg.sender.call.value(_weiToWithdraw)());   // 这里应该使用transfer
        balances[msg.sender] -= _weiToWithdraw;  // 这一步有漏洞，上面一行使用了call
        lastWithdrawTime[msg.sender] = now;
    }
}

审查结果为：

Installing/Updating JRE in /home/siwei/.jdeploy...
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated node-jre@0.2.3: discontinued

added 81 packages, and audited 82 packages in 23s

3 packages are looking for funding
  run `npm fund` for details

4 moderate severity vulnerabilities

Some issues need review, and may require choosing
a different dependency.

Run `npm audit` for details.
./EtherStore.sol
jar:file:/home/siwei/.asdf/installs/nodejs/16.15.1/.npm/lib/node_modules/@smartdec/smartcheck/jdeploy-bundle/smartcheck-2.0-jar-with-dependencies.jar!/solidity-rules.xmlruleId: SOLIDITY_CALL_WITHOUT_DATA
patternId: om991k
severity: 2
line: 18
column: 27
content: call.value(_weiToWithdraw)()

ruleId: SOLIDITY_UPGRADE_TO_050
patternId: 83k1no
severity: 1
line: 18
column: 27
content: call.value(_weiToWithdraw)()

SOLIDITY_UPGRADE_TO_050 :1
SOLIDITY_CALL_WITHOUT_DATA :1

最关键的就是下面的2个。 

然后，我们查一下 这2个都是啥。

1. SOLIDITY_UPGRADE_TO_050 这个是可以被忽略的(ignore)

2. SOLIDITY_CALL_WITHOUT_DATA 这个是 re-entrancy （重入漏洞）

这个结果来自于这里：

https://github.com/smartbugs/smartbugs/wiki/Vulnerabilities-mapping