Hasher

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This object is returned by crypto.createHash() and allows the user to successively add more string data to be hashed, and to extract digests along the way.

Name	Type	Description
Hasher.update(string)	function	Add more data to the string we want to create a hash of. Takes one string argument, which is the new data we want to add.
Hasher.digest(string)	function	Return a digest from the data added (using update()) to the Hasher object so far. Takes one string argument, which is the encoding format to return. This can be either "base64", "base64url", "base64rawurl", "hex" or "binary". See the examples below for details.

Example

import crypto from 'k6/crypto';

export default function () {
  console.log(crypto.sha256('hello world!', 'hex'));
  const hasher = crypto.createHash('sha256');
  hasher.update('hello ');
  hasher.update('world!');
  console.log(hasher.digest('hex'));

  // Other encodings
  console.log('base64:', hasher.digest('base64'));
  console.log('base64url:', hasher.digest('base64url'));
  console.log('base64rawurl:', hasher.digest('base64rawurl'));
  console.log('binary:', new Uint8Array(hasher.digest('binary')));
}

The above code sample should produce this in its output:

INFO[0000] 7509e5bda0c762d2bac7f90d758b5b2263fa01ccbc542ab5e3df163be08e6ca9
INFO[0000] 7509e5bda0c762d2bac7f90d758b5b2263fa01ccbc542ab5e3df163be08e6ca9
INFO[0000] base64: dQnlvaDHYtK6x/kNdYtbImP6Acy8VCq1498WO+CObKk=
INFO[0000] base64url: dQnlvaDHYtK6x_kNdYtbImP6Acy8VCq1498WO-CObKk=
INFO[0000] base64rawurl: dQnlvaDHYtK6x_kNdYtbImP6Acy8VCq1498WO-CObKk
INFO[0000] binary: 117,9,229,189,160,199,98,210,186,199,249,13,117,139,91,34,99,250,1,204,188,84,42,181,227,223,22,59,224,142,108,169

Init context

k6

k6/crypto

k6/data

k6/encoding

k6/execution

k6/experimental

k6/html

k6/http

k6/metrics

k6/net/grpc

k6/ws

Error Codes

Hasher

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