@aws-crypto/supports-web-crypto

What is @aws-crypto/supports-web-crypto?

The @aws-crypto/supports-web-crypto npm package is designed to check if the current runtime environment supports the Web Cryptography API. This is particularly useful for applications that need to perform cryptographic operations in environments where support for Web Crypto might vary, such as in different browsers or Node.js versions. By using this package, developers can ensure that their applications only attempt to use Web Crypto features when they are available, thereby avoiding potential errors in unsupported environments.

What are @aws-crypto/supports-web-crypto's main functionalities?

Checking Web Crypto Support

This feature allows developers to programmatically check if the Web Cryptography API is supported in the current runtime environment. The provided code sample demonstrates how to import the `supportsWebCrypto` function from the package and use it to perform this check. Depending on the result, it logs a message indicating whether or not Web Crypto is supported.

import { supportsWebCrypto } from '@aws-crypto/supports-web-crypto';

if (supportsWebCrypto()) {
  console.log('Web Crypto is supported in this environment.');
} else {
  console.log('Web Crypto is not supported in this environment.');
}

Other packages similar to @aws-crypto/supports-web-crypto

crypto-browserify

The crypto-browserify package is a port of Node.js's crypto module to the browser. While it does not specifically check for Web Crypto support like @aws-crypto/supports-web-crypto, it provides a way to use cryptographic functions in environments that do not support the Web Cryptography API natively. This makes it a useful alternative for developers looking to perform cryptographic operations in a wide range of environments.

webcrypto-liner

Webcrypto-liner is a polyfill for the Web Cryptography API that aims to provide a consistent API across different environments, including those that do not support Web Crypto natively. Unlike @aws-crypto/supports-web-crypto, which checks for support, webcrypto-liner attempts to fill in the gaps when support is lacking. This makes it a complementary solution for ensuring that cryptographic operations can be performed regardless of the environment's native support.

README

@aws-crypto/supports-web-crypto

Functions to check web crypto support for browsers.

Usage

import {supportsWebCrypto} from '@aws-crypto/supports-web-crypto';

if (supportsWebCrypto(window)) {
  // window.crypto.subtle.encrypt will exist
}

supportsWebCrypto

Used to make sure window.crypto.subtle exists and implements crypto functions as well as a cryptographic secure random source exists.

supportsSecureRandom

Used to make sure that a cryptographic secure random source exists. Does not check for window.crypto.subtle.

supportsSubtleCrypto

supportsZeroByteGCM

Test

npm test