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Documentation Grafana k6 JavaScript API crypto SubtleCrypto digest

digest

The digest() method generates a cryptographically secure digest of the given data. A digest is a short fixed-length value derived from some input data. The digest() method is commonly used to compute a checksum of data or to verify the integrity of data.

Usage

Copy

digest(algorithm, data)

Parameters

Supported algorithms

Return Value

A Promise that resolves to a new ArrayBuffer containing the digest.

Example

JavaScript

Copy

JavaScript Copy

export default async function () {
  const digest = await crypto.subtle.digest('SHA-256', stringToArrayBuffer('Hello, world!'));

  console.log(arrayBufferToHex(digest));
}

function arrayBufferToHex(buffer) {
  return [...new Uint8Array(buffer)].map((x) => x.toString(16).padStart(2, '0')).join('');
}

function stringToArrayBuffer(s) {
  return Uint8Array.from(new String(s), (x) => x.charCodeAt(0));
}