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import digest from '../runtime/digest.ts'import { encode as base64url } from '../runtime/base64url.ts'
import { JOSENotSupported, JWKInvalid } from '../util/errors.ts'import { encoder } from '../lib/buffer_utils.ts'import type { JWK } from '../types.d.ts'import isObject from '../lib/is_object.ts'
const check = (value: unknown, description: string) => {  if (typeof value !== 'string' || !value) {    throw new JWKInvalid(`${description} missing or invalid`)  }}
/** * Calculates a base64url-encoded JSON Web Key (JWK) Thumbprint * * @param jwk JSON Web Key. * @param digestAlgorithm Digest Algorithm to use for calculating the thumbprint. Default is *   "sha256". * * @see {@link https://www.rfc-editor.org/rfc/rfc7638 RFC7638} */export async function calculateJwkThumbprint(  jwk: JWK,  digestAlgorithm?: 'sha256' | 'sha384' | 'sha512',): Promise<string> {  if (!isObject(jwk)) {    throw new TypeError('JWK must be an object')  }
  digestAlgorithm ??= 'sha256'
  if (    digestAlgorithm !== 'sha256' &&    digestAlgorithm !== 'sha384' &&    digestAlgorithm !== 'sha512'  ) {    throw new TypeError('digestAlgorithm must one of "sha256", "sha384", or "sha512"')  }
  let components: JWK  switch (jwk.kty) {    case 'EC':      check(jwk.crv, '"crv" (Curve) Parameter')      check(jwk.x, '"x" (X Coordinate) Parameter')      check(jwk.y, '"y" (Y Coordinate) Parameter')      components = { crv: jwk.crv, kty: jwk.kty, x: jwk.x, y: jwk.y }      break    case 'OKP':      check(jwk.crv, '"crv" (Subtype of Key Pair) Parameter')      check(jwk.x, '"x" (Public Key) Parameter')      components = { crv: jwk.crv, kty: jwk.kty, x: jwk.x }      break    case 'RSA':      check(jwk.e, '"e" (Exponent) Parameter')      check(jwk.n, '"n" (Modulus) Parameter')      components = { e: jwk.e, kty: jwk.kty, n: jwk.n }      break    case 'oct':      check(jwk.k, '"k" (Key Value) Parameter')      components = { k: jwk.k, kty: jwk.kty }      break    default:      throw new JOSENotSupported('"kty" (Key Type) Parameter missing or unsupported')  }
  const data = encoder.encode(JSON.stringify(components))  return base64url(await digest(digestAlgorithm, data))}
/** * Calculates a JSON Web Key (JWK) Thumbprint URI * * @param jwk JSON Web Key. * @param digestAlgorithm Digest Algorithm to use for calculating the thumbprint. Default is *   "sha256". * * @see {@link https://www.rfc-editor.org/rfc/rfc9278 RFC9278} */export async function calculateJwkThumbprintUri(  jwk: JWK,  digestAlgorithm?: 'sha256' | 'sha384' | 'sha512',): Promise<string> {  digestAlgorithm ??= 'sha256'  const thumbprint = await calculateJwkThumbprint(jwk, digestAlgorithm)  return `urn:ietf:params:oauth:jwk-thumbprint:sha-${digestAlgorithm.slice(-3)}:${thumbprint}`}