# bf-node

BF-Node is a lightweight interpreter of the Brainfuck programming language, written in JavaScript

The plain version of Brainfuck in the library weighs only 230 bytes

## Usage

JavaScript
```
const Brainfuck = require("bf-node")
Brainfuck.base(/* code */, /* options */) // options are optional
Brainfuck.random(/* code */, /* options */)
```

Command line
```
bf <type> <path to file>
```

## Types

`base` - The plain Brainfuck

`random` - Brainfuck with `?` operator, generates a random number from 0 to current cell value and stores result in current cell

## Options

Options is an array of functions

Default:
```
[
    t => new Uint8Array(t), // the function that makes the memory array, t is the length input
    String.fromCharCode, // the function that turns numbers into characters
    s => s.charCodeAt(), // the function that turns characters into numbers
    t => process.stdout.write(t), // the function that outputs the result
    () => ReadlineSync.question("> ", {
        limit: input => input.length == 1,
        limitMessage: ""
    }) // the function that receives the input
]
```

## Performance

100 million `+` operations took on average 570ms to complete

100 million `-` operations took on average 600ms to complete

## File sizes

`base` - 230 bytes

`random` - 279 bytes

Brainfuck programming language interpreter for Node.js. 

Supply Chain Attack on Axios Pulls Malicious Dependency from npm

bf-node

Brainfuck programming language interpreter for Node.js

hyperknf

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Ambiguous License Classifier

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Bad text encoding

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Bad semver

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Bad dependency semver

Source files contain bidirectional unicode control characters. This could indicate a Trojan source supply chain attack. See: trojansource.codes for more information.

What are bidirectional unicode control characters?

Bidirectional unicode control characters

This package has multiple bin scripts with the same name. This can cause non-deterministic behavior when installing or could be a sign of a supply chain attack.

What is bin script confusion?

Bin script confusion

This Chrome extension includes content scripts that execute JavaScript on specified websites.

What are Chrome extension content scripts?

Chrome: Content Script

This Chrome extension requests host permissions to access specific websites or domains.

What are Chrome extension host permissions?

Chrome: Host Permission

This Chrome extension requests permissions to access browser APIs, user data, or system features.

What are Chrome extension permissions?

Chrome: Permission

This Chrome extension requests wildcard host permissions that grant broad access to websites.

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Chrome: Wildcard Host Permission

Semantic versions published out of chronological order.

What is a chronological version anomaly?

Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

What do I need to know about license files?

Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

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Title

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Contains a high severity Common Vulnerability and Exposure (CVE).

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High CVE

Uses debug, reflection and dynamic code execution features.

What is debug access?

Debug access

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Deprecated

Contains a known deprecated SPDX license exception.

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Deprecated SPDX exception

License is deprecated which may have legal implications regarding the package's use.

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Deprecated license

Package name is similar to other popular packages and may not be the package you want.

What is a typosquat?

Possible typosquat attack

Dynamic require can indicate the package is performing dangerous or unsafe dynamic code execution.

What is dynamic require?

Dynamic require

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Empty package

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Environment variable access

Something was found which is explicitly marked as unlicensed.

Explicitly Unlicensed Item

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What are extraneous dependencies?

Name

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Contains a dependency which resolves to a file. This can obfuscate analysis and serves no useful purpose.

What are file dependencies?

File dependency

Accesses the file system, and could potentially read sensitive data.

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Filesystem access

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What are wildcard dependencies?

Wildcard dependency

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Alert title

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What are GitHub Actions taint flows?

GitHub Actions: Input argument exported as environment variable

An input argument to this GitHub Action is being passed back as an output. If a user of this action passes untrusted input, it could be used in an insecure manner by consuming workflows.

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An input argument to this GitHub Action flows into a dangerous sink (such as shell command execution). This could allow a malicious user to inject commands or exploit the action.

GitHub Actions: Input argument flows to dangerous sink

A GitHub context variable (such as issue title, PR description, or comment body) is being exported as an environment variable. These context values are user-controlled and could be exploited by subsequent workflow steps.

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A GitHub context variable (such as issue title, PR description, or comment body) is being passed back as an output. These context values are user-controlled and could be exploited by consuming workflows.

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GitHub Actions: Environment variable flows to dangerous sink

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Git dependency

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GitHub dependency

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What is an AI-detected potential code anomaly?

AI-detected potential code anomaly

AI has identified this package as a potential typosquat of a more popular package. This suggests that the package may be intentionally mimicking another package's name, description, or other metadata.

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AI-detected possible typosquat

AI has identified this package as malware. This is a strong signal that the package may be malicious.

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AI-detected potential malware

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AI-detected potential security risk

Contains native code (e.g., compiled binaries or shared libraries). Including native code can obscure malicious behavior.

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Native code

Contains high entropy strings. This could be a sign of encrypted data, leaked secrets or obfuscated code.

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High entropy strings

Contains unicode homoglyphs which can be used in supply chain confusion attacks.

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Unicode homoglyphs

Contains a dependency which resolves to a remote HTTP URL which could be used to inject untrusted code and reduce overall package reliability.

What are http dependencies?

HTTP dependency

Install scripts are run when the package is installed or built. Malicious packages often use scripts that run automatically to execute payloads or fetch additional code.

What is an install script?

Install scripts

Package has an invalid manifest file and can cause installation problems if you try to use it.

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Invalid manifest file

Source files contain invisible characters. This could indicate source obfuscation or a supply chain attack.

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Invisible chars

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License change

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License exception

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Long strings

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Major refactor

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Known malware

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Missing dependency

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Missing license

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Mixed license

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What is a modified license exception?

Modified license exception

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What is a modified license?

Modified license

What is network access?

Network access

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

bf-node

bf-node

Usage

Types

Options

Performance

File sizes

Keywords

Related posts

bf-node

bf-node

Usage

Types

Options

Performance

File sizes

Keywords

Related posts

Axios Maintainer Confirms Social Engineering Attack Behind npm Compromise

Node.js Drops Bug Bounty Rewards After Funding Dries Up