DevSkim Plugin for Sublime Text

The plugin implements a security linter within the Sublime Text editor, leveraging the rules from the DevSkim repo. It helps software engineers to write secure code by flagging potentially dangerous calls, and gives in-context advice for remediation.

PUBLIC PREVIEW

DevSkim is currently in public preview. We're looking forward to working with the community to improve both the scanning engines and rules over the next few months, and welcome your feedback and contributions!

Requirements

The plugin requires Sublime Text 3 (build >= 3114), and will function on Windows, Linux, and MacOS.

Installation

Clone this repository as well as the rules repo directly into your Sublime Text plugin folder. For example, for Sublime Text 3 on Windows would look something like:

cd "%APPDATA%\"Sublime Text 3\Packages"
git clone https://github.com/Microsoft/DevSkim-Sublime-Plugin.git DevSkim
cd DevSkim
git clone https://github.com/Microsoft/DevSkim-Rules.git rules

And on MacOS:

cd ~/"Library/Application Support/Sublime Text 3/Packages"
git clone https://github.com/Microsoft/DevSkim-Sublime-Plugin.git DevSkim
cd DevSkim
git clone https://github.com/Microsoft/DevSkim-Rules.git rules

And on Linux:

cd ~/.config/sublime-text-3/Packages
git clone https://github.com/Microsoft/DevSkim-Sublime-Plugin.git DevSkim
cd DevSkim
git clone https://github.com/Microsoft/DevSkim-Rules.git rules

Note if you are using the portable version of Sublime Text, the location will be different. See http://docs.sublimetext.info/en/latest/basic_concepts.html#the-data-directory for more info.

IMPORTANT If you already have a package called DevSkim installed, either remove this first, or clone this repo to a different folder.

Platform support

Operating System:

The plugin has identical behavior across Windows, MacOS, and Linux.

Sublime Text Version:

The plugin requires Sublime Text 3 builds >= 3114.

Features

The below features are available via the keyboard shortcuts shown, or via the Command Palette (^ means the ctrl or cmd keys):

Feature	Shortcut
Run DevSkim	^D

Rules System

The plugin supports both built-in and custom rules:

Built-In Rules

Built-in rules come from the DevSkim-Rules repo, and should be stored in the rules directory within the DevSkim directory.

Rules are organized by subdirectory and file, but are flattened internally when loaded.

Each rule contains a set of patterns (strings and regular expressions) to match, a list of file types to apply the rule to, and, optionally, a list of possible code fixes. An example rule is shown below:

[
    {
        "id": "DS126858",
        "name": "Weak/Broken Hash Algorithm",
        "active": true,
        "tags": [
            "Cryptography.BannedHashAlgorithm"
        ],
        "severity": "critical",
        "description": "A weak or broken hash algorithm was detected.",
        "replacement": "Consider switching to use SHA-256 or SHA-512 instead.",
        "rule_info": "https://github.com/microsoft/devskim/guidance/DS126858.md",
        "applies_to": [
            "$PHP"
        ],
        "patterns": [
            {
                "pattern": "md5(",
                "type": "string"
            },
        ],
        "fix_it": [
            {
                "type": "regex_substitute",
                "name": "Change to SHA-256",
                "search": "\\bmd5\\(([^\\)]+\\)",
                "replace": "hash('sha256', $1)"
            }
        ]
    }
]

Reporting Issues

Please see CONTRIBUTING for information on reporting issues and contributing code.

Tips and Known Issues

See tips and known issues in the wiki page.