import { COSEALG } from "../../cose.ts";
import { mapCoseAlgToWebCryptoAlg } from "./mapCoseAlgToWebCryptoAlg.ts";
import { getWebCrypto } from "./getWebCrypto.ts";

/**
 * Generate a digest of the provided data.
 *
 * @param data The data to generate a digest of
 * @param algorithm A COSE algorithm ID that maps to a desired SHA algorithm
 */
export async function digest(
  data: Uint8Array,
  algorithm: COSEALG,
): Promise<Uint8Array> {
  const WebCrypto = await getWebCrypto();

  const subtleAlgorithm = mapCoseAlgToWebCryptoAlg(algorithm);

  const hashed = await WebCrypto.subtle.digest(subtleAlgorithm, data);

  return new Uint8Array(hashed);
}