util.promisify

# util.promisify
Polyfill for util.promisify in node versions &lt; v8

node v8.0.0 added support for a built-in `util.promisify`: https://github.com/nodejs/node/pull/12442/

This package provides the built-in `util.promisify` in node v8.0.0 and later, and a replacement in other environments.

## Usage

**Direct**
```js
const promisify = require('util.promisify');
// Use `promisify` just like the built-in method on `util`
```

**Shim**
```js
require('util.promisify/shim')();
// `util.promisify` is now defined
const util = require('util');
// Use `util.promisify`
```

Note: this package requires a native ES5 environment, and for `Promise` to be globally available. It will throw upon requiring it if these are not present.

## Promisifying modules

If you want to promisify a whole module, like the `fs` module, you can use [`util.promisify-all`](https://www.npmjs.com/package/util.promisify-all).


Polyfill/shim for util.promisify in node versions < v8. 

Meet the Socket Team at BlackHat and DEF CON in Las Vegas, Aug 7-8

Polyfill/shim for util.promisify in node versions < v8

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(Experimental) An ambiguous license classifier was found.

What is an ambiguous license classifier?

Ambiguous License Classifier

Source files are encoded using a non-standard text encoding.

What is bad text encoding?

Bad text encoding

Package version is not a valid semantic version (semver).

What is bad semver?

Bad semver

Package has dependencies with an invalid semantic version. This could be a sign of beta, low quality, or unmaintained dependencies.

What is bad dependency semver?

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

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

(Experimental) Copyleft license information was found

What do I need to know about license files?

Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

What is a critical CVE?

Title

Critical CVE

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

What is a CVE?

High CVE

Uses debug, reflection and dynamic code execution features.

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Debug access

The maintainer of the package marked it as deprecated. This could indicate that a single version should not be used, or that the package is no longer maintained and any new vulnerabilities will not be fixed.

What is a deprecated package?

Deprecated

(Experimental) Contains a known deprecated SPDX license exception.

What is a deprecated SPDX exception?

Deprecated SPDX exception

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

What is a deprecated license?

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

Package does not contain any code. It may be removed, is name squatting, or the result of a faulty package publish.

What is an empty package?

Empty package

Package accesses environment variables, which may be a sign of credential stuffing or data theft.

What is environment variable access?

Environment variable access

(Experimental) Something was found which is explicitly marked as unlicensed

Explicitly Unlicensed Item

Package optionally loads a dependency which is not specified within any of the package.json dependency fields. It may inadvertently be importing dependencies specified by other packages.

What are extraneous dependencies?

Name

Extraneous dependency

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.

What is filesystem access?

Filesystem access

Package has a dependency with a floating version range.  This can cause issues if the dependency publishes a new major version.

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Floating dependency

Contains a dependency which resolves to a remote git URL. Dependencies fetched from git URLs are not immutable can be used to inject untrusted code or reduce the likelihood of a reproducible install.

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Contains a dependency which resolves to a GitHub URL. Dependencies fetched from GitHub specifiers are not immutable can be used to inject untrusted code or reduce the likelihood of a reproducible install.

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GitHub dependency

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AI has determined that this package may contain potential security issues or vulnerabilities.

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AI detected security risk

Contains native code which could be a vector to obscure malicious code, and generally decrease the likelihood of reproducible or reliable installs.

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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.

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HTTP dependency

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

What is an install script?

Install scripts

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

What is an invalid manifest file?

Invalid manifest file

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

What are invisible characters?

Invisible chars

(Experimental) Package license has recently changed.

What is a license change?

License change

(Experimental) Contains an SPDX license exception.

What is a license exception?

License exception

SPDX disjunction for an artifact's license information

What is a a SPDX disjunction?

SPDX disjunction

Contains long string literals, which may be a sign of obfuscated or packed code.

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Long strings

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

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This package is malware. We have asked the package registry to remove it.

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Known malware

This package has inconsistent metadata. This could be malicious or caused by an error when publishing the package.

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Manifest confusion

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

What is a medium CVE?

Medium CVE

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

What is a mild CVE?

Low CVE

This package contains minified code.  This may be harmless in some cases where minified code is included in packaged libraries, however packages on npm should not minify code.

What's wrong with minified code?

Minified code

(Experimental) A package's licensing information has fine-grained problems

Nonpermissive License

The package was published by an npm account that no longer exists.

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Non-existent author

A required dependency is not declared in package.json and may prevent the package from working.

What is a missing dependency?

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(Experimental) Package does not have a license and consumption legal status is unknown.

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This package is missing it's tarball.  It could be removed from the npm registry or there may have been an error when publishing.

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(Experimental) Package contains multiple licenses.

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Mixed license

(Experimental) Package contains a modified version of an SPDX license exception.  Please read carefully before using this code.

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Modified license exception

(Experimental) Package contains a modified version of an SPDX license.  Please read carefully before using this code.

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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.

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Package does not specify a list of contributors or an author in package.json.

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No contributors or author data

Package does not have a linked bug tracker in package.json.

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No bug tracker

(Experimental) License information could not be found

No License Found

Package does not have a README. This may indicate a failed publish or a low quality package.

Why are READMEs important?

No README

Package does not have a linked source code repository. Without this field, a package will have no reference to the location of the source code use to generate the package.

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No repository

Package does not have any tests. This is a strong signal of a poorly maintained or low quality package.

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Package is not semver >=1. This means it is not stable and does not support ^ ranges.

util.promisify

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Promisifying modules

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