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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
digest(algorithm, data)
Parameters
Name | Type | Description |
---|---|---|
algorithm | a string or object with a single name string property | Names the hash function to use. Supported values are "SHA-1" , "SHA-256" , "SHA-384" and "SHA-512" . Note that the SHA-1 hash function is not considered safe for cryptographic use. |
data | ArrayBuffer , TypedArray , or DataView | The data to be digested. |
Return Value
A Promise
that resolves to a new ArrayBuffer
containing the digest.
Example
JavaScript
import { crypto } from 'k6/experimental/webcrypto';
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));
}
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