/**
 * Public façade for HKDF. Routes through the primitive selector layer.
 */

import type { HashAlgorithm } from "../../hash/sha2/sha2.js";
import { hkdf as selectedHkdf } from "../../primitives/hkdf/hkdf.select/hkdf.select.js";

export interface HkdfOptions {
    readonly salt: Uint8Array;
    readonly info: Uint8Array;
    readonly length: number;
}

/** HKDF-Extract-and-Expand over SHA-256/384/512. */
export function hkdf(
    algo: HashAlgorithm,
    ikm: Uint8Array,
    options: HkdfOptions
): Uint8Array {
    return selectedHkdf(algo, ikm, options);
}