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MythX Security Analysis Plugin for Truffle Framework

This plugin adds automated smart contract security analysis to the Truffle framework. It is based on MythX, the security analysis API for Ethereum smart contracts. The plugin is compatible with Truffle 5.0 or higher.

Installing the Plugin

To install the latest stable version from NPM:

$ npm install -g truffle-security

If you're feeling adventurous, you can also install the from the master branch:

$ npm install -g git+https://[email protected]/ConsenSys/truffle-security.git

Windows only

On Windows node-gyp dependency requires windows-build-tools to be installed from an elevated PowerShell or CMD.exe (run as Administrator).

npm install --global --production windows-build-tools

For more details refer to node-gyp installation guide.

Configuration

Currently, the plugin must be activated on a per-project basis. If truffle-security was installed to the Truffle project root, it will try to automatically install itself to truffle-config.js. If you installed truffle-security globally, add the following to truffle-config.js in the root directory of your Truffle project to enable the plugin:

module.exports = {
    plugins: [ "truffle-security" ]
};

MythX Account

By default, the plugin is configured with a MythX trial account that allows a limited number of requests. You can set up a free account on the MythX website to get full access.

After setting up an account, set the following enviromment variables to your ETH address and password (add this to your .bashrc or .bash_profile for added convenience):

export MYTHX_ETH_ADDRESS=0x1234567891235678900000000000000000000000
export MYTHX_PASSWORD='Put your password in here!'

And if you're using Windows OS with PowerShell:

$env:MYTHX_ETH_ADDRESS="0x1234567891235678900000000000000000000000"
$env:MYTHX_PASSWORD="Put your password in here!"

Solc Version

You can specify which version of solc to use in truffle-config.js as explained in truffle's documentation. MythX for Truffle will use the same version of solc that Truffle uses to compile and analyze your contracts.

module.exports = {
  plugins: [ "truffle-security" ],
  networks: {
    ... etc ...
  },
  compilers: {
     solc: {
       version: <string>  // ex:  "0.4.20". (Default: Truffle's installed solc)
     }
  }
};

Running Security Analyses

Once the plugin is installed the truffle run verify becomes available. You can either analyze a specific contract by running truffle run verify <contract-name> or the entire project leaving out the contract name.

Your project must compile successfully for the security analysis to work. Note that the verify command invokes truffle compile automatically if the build files are not up to date.

Here is the output of truffle verify for an example from the DevCon4 MythX Workshop:

$ truffle run verify

/Projects/mythx-playground/exercise2/contracts/Tokensale.sol
   1:0   warning  A floating pragma is set                SWC-103
  16:29  warning  The binary multiplication can overflow  SWC-101
  18:8   warning  The binary addition can overflow        SWC-101

✖ 4 problems (0 errors, 4 warnings)

Here is an example of analyzing a single contract and using the table report style:

$ truffle run verify --style table

/Projects/mythx-playground/exercise2/contracts/Tokensale.sol

║ Line     │ Column   │ Type     │ Message                                                │ Rule ID              ║
╟──────────┼──────────┼──────────┼────────────────────────────────────────────────────────┼──────────────────────╢
║ 1        │ 0        │ warning  │ A floating pragma is set.                              │ SWC-103              ║
║ 16       │ 29       │ warning  │ The binary multiplication can overflow.                │ SWC-101              ║
║ 18       │ 8        │ warning  │ The binary addition can overflow.                      │ SWC-101              ║

╔════════════════════════════════════════════════════════════════════════════════════════════════════════════════╗
║ 0 Errors                                                                                                       ║
╟────────────────────────────────────────────────────────────────────────────────────────────────────────────────╢
║ 4 Warnings                                                                                                     ║
╚════════════════════════════════════════════════════════════════════════════════════════════════════════════════╝

Advanced Options

Run truffle run verify --help to show advanced configuration options.

$ truffle run verify --help

Usage: truffle run verify [options] [*contract-name1* [*contract-name2*] ...]

Runs MythX analyses on given Solidity contracts. If no contracts are
given, all are analyzed.

Options:
  --all      Compile all contracts instead of only the contracts changed since last compile.
  --mode { quick | full }
             Perform quick or in-depth (full) analysis.
  --style { stylish | json | table | tap | unix | ... },
             Output report in the given es-lint style style.
             See https://eslint.org/docs/user-guide/formatters/ for a full list.
  --json | --yaml
             Dump results in unprocessed JSON or YAML format as it comes back from MythX.
             Note: this disables providing any es-lint style reports, and that
             --style=json is processed for eslint, while --json is not.
  --timeout *secs*
             Limit MythX analyses time to *secs* seconds.
             The default is 300 seconds (five minutes).
  --initial-delay *secs*
             Minimum amount of time to wait before attempting a first status poll to MythX.
             The default is 45 seconds.
             See https://github.com/ConsenSys/armlet#improving-polling-response
  --limit *N*
             Have no more than *N* analysis requests pending at a time.
             As results come back, remaining contracts are submitted.
             The default is 4 contracts, the maximum value, but you can
             set this lower.
  --debug    Provide additional debug output. Use --debug=2 for more
             verbose output
  --min-severity { warning | error }
             Ignore SWCs below the designated level
  --swc-blacklist { 101 | 103,111,115 | ... }
             Ignore a specific SWC or list of SWCs.
  --uuid *UUID*
             Print in YAML results from a prior run having *UUID*
             Note: this is still a bit raw and will be improved.
  --version  Show package and MythX version information.
  --progress, --no-progress
             Enable/disable progress bars during analysis. The default is enabled.
  --color, --no-color
             Enable/disable output coloring. The default is enabled.


Configuration options can also be stored as json in truffle-security.json at the truffle project root. i.e. :

{
    "style": "table",
    "mode": "quick",
    "min-severity": "warning",
    "swc-blacklist": [103,111]
}