solium-plugin-security

The official Security Plugin for Solium

This Plugin provides security-focused lint rules for Solium.

The rules have been taken from Consensys' Recommended Smart Contract Practices and Solium's Rule Wishlist.

Installation

NOTE: If you're using Solium v1.0.1 or above, this plugin comes pre-installed as a local dependency and you can skip this section.

npm install -g solium-plugin-security

Usage

NOTE: If you've installed Solium v1.0.1 or above and created soliumrc.json using solium --init, you can skip this step since solium automatically applies the security plugin for you.

Add security to your soliumrc.json's plugins array. Your configuration file should look like:

{
    "extends": "solium:all",
    "plugins": ["security"],
    "rules": {
        ...
    }
}

List of rules

Below are the rules supplied by this plugin and the information on passing options to them and their auto-fixing capabilities.

Some of them aren't always desirable and are therefore disabled by default (marked below as OFF). You should explicitly enable them in your .soliumrc.json.

Name	Description	Options	Defaults	Fixes
OFF else-after-elseif	Encourage user to use else statement after else-if statement
enforce-explicit-visibility	Encourage user to explicitly specify visibility of function			YES
enforce-loop-bounds	Encourage use of loops with fixed bounds
OFF enforce-placeholder-last	Enforce that the function placeholder is the last statement in the modifier
OFF return-at-end	Discourage use of early returns in functions
OFF one-break-per-loop	Discourage use of multiple breaks in while/for/do loops
OFF max-statements-in-func	Enforce upper limit on number of statements inside a function	Maximum number of statements	25
OFF no-abstract-func	Discourage use of abstract functions
OFF no-bit-operations	Disallow bitwise operations
no-block-members	Discourage use of members 'blockhash' & 'timestamp' (and alias 'now') of 'block' global variable	List of members to warn against	["blockhash", "timestamp"]
no-call-value	Discourage use of .call.value()()
OFF no-continue	Discourage use of 'continue' statement
no-assign-params	Disallow assigning to function parameters
no-fixed	Disallow fixed point types
OFF no-inheritance	Discourage use of inheritance	Disallow interface inheritance	{ "no-interface": false }
no-inline-assembly	Discourage use of inline assembly
no-low-level-calls	Discourage the use of low-level functions - call(), callcode() & delegatecall()	List of functions to warn against	["call", "callcode", "delegatecall"]
no-modify-for-iter-var	Discourage user to modify a for loop iteration counting variable in the loop body
OFF no-multiple-inheritance	Discourage use of multiple inheritance	Disallow interface inheritance	{ "no-interface": false }
OFF no-named-params	Disallow named function parameters
OFF no-named-returns	Discourage use of named returns in functions
OFF 256-bit-ints-only	Disallow non-256 bit integers
no-send	Discourage the use of unsafe method 'send'
no-sha3	Encourage use of 'keccak256()' over 'sha3()' function			YES
OFF no-suicide-or-selfdestruct	Disallow suicide and selfdestruct
no-throw	Discourage use of 'throw' statement for error flagging			YES
no-tx-origin	Discourage use of 'tx.origin' global variable
no-var	Disallow type deduction via var
no-unreachable-code	Disallow unreachable code
OFF no-user-defined-modifiers	Disallow user-defined modifiers
OFF no-void-returns	Discourage use of void returns in functions prototypes
OFF no-func-overriding	Discourage function overriding

An example soliumrc.json configuring and applying this plugin is:

{
    "plugins": ["security"],
    "rules": {
        "some-other-solium-rule": 1,
        "security/no-low-level-calls": ["error", ["call", "delegatecall"]],
        "security/no-block-members": [1, ["timestamp"]],
        "security/no-throw": "off"
    }
}

This tells solium to apply the 3 security/ rules with special configuration provided and apply the remaining rules of the plugin with their default configurations. If you want to disable a plugin rule, you have to explicitly disable it inside rules.

Lint normally using solium -d contracts/ or solium -d contracts/ --fix to apply fixes as well.

Developer Setup

• git clone <URL-of-this-repo>
• cd solium-plugin-security
• npm install --dev
• npm link
• npm link solium-plugin-security
• npm test

If you'd also like to use your develop build of this plugin with dev build of Solium, go to Solium's directory and run npm link solium-plugin-security. This will let Solium access your modified plugin instead of its pre-installed security module.

Access Solium's Developer Docs

Roadmap

• Add automated tests
• Refine rule enforce-explicit-visibility
• Add more security rules

Security rules to be implemented

• no-multiple-send-calls
• check-send-result

Access the complete Solium documentation