function hkdf
Usage in Deno
```typescript import { hkdf } from "node:node__crypto.d.ts"; ```
hkdf(digest: string,irm: BinaryLike | KeyObject,salt: BinaryLike,info: BinaryLike,keylen: number,callback: (err: Error | null,derivedKey: ArrayBuffer,) => void,): void
HKDF is a simple key derivation function defined in RFC 5869\. The given `ikm`, `salt` and `info` are used with the `digest` to derive a key of `keylen` bytes.
The supplied `callback` function is called with two arguments: `err` and `derivedKey`. If an errors occurs while deriving the key, `err` will be set;
otherwise `err` will be `null`. The successfully generated `derivedKey` will
be passed to the callback as an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer). An error will be thrown if any
of the input arguments specify invalid values or types.
```js
import { Buffer } from 'node:buffer';
const {
hkdf,
} = await import('node:crypto');
hkdf('sha512', 'key', 'salt', 'info', 64, (err, derivedKey) => {
if (err) throw err;
console.log(Buffer.from(derivedKey).toString('hex')); // '24156e2...5391653'
});
```
irm: BinaryLike | KeyObject
salt: BinaryLike
The salt value. Must be provided but can be zero-length.
info: BinaryLike
Additional info value. Must be provided but can be zero-length, and cannot be more than 1024 bytes.
The length of the key to generate. Must be greater than 0. The maximum allowable value is `255` times the number of bytes produced by the selected digest function (e.g. `sha512`
generates 64-byte hashes, making the maximum HKDF output 16320 bytes).
void