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@panva/hkdf

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@panva/hkdf

HKDF with no dependencies using runtime's native crypto

  • 1.2.1
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What is @panva/hkdf?

@panva/hkdf is a Node.js implementation of the HMAC-based Extract-and-Expand Key Derivation Function (HKDF) as described in RFC 5869. It is used to derive one or more keys from a single secret key, which is useful in cryptographic applications.

What are @panva/hkdf's main functionalities?

Key Derivation

This feature allows you to derive a key from initial key material (ikm), a salt, and optional context information (info). The derived key length and hash algorithm can be specified.

const { hkdf } = require('@panva/hkdf');

async function deriveKey() {
  const ikm = Buffer.from('initial key material');
  const salt = Buffer.from('salt');
  const info = Buffer.from('info');
  const length = 32; // length of the derived key in bytes
  const hash = 'SHA-256';

  const derivedKey = await hkdf(hash, ikm, salt, info, length);
  console.log(derivedKey.toString('hex'));
}

deriveKey();

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Package last updated on 03 Jul 2024

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