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- import digest from '../runtime/digest.js';
- import { encode as base64url } from '../runtime/base64url.js';
- import { JOSENotSupported, JWKInvalid } from '../util/errors.js';
- import { encoder } from '../lib/buffer_utils.js';
- import isObject from '../lib/is_object.js';
- const check = (value, description) => {
- if (typeof value !== 'string' || !value) {
- throw new JWKInvalid(`${description} missing or invalid`);
- }
- };
- export async function calculateJwkThumbprint(jwk, digestAlgorithm) {
- if (!isObject(jwk)) {
- throw new TypeError('JWK must be an object');
- }
- digestAlgorithm !== null && digestAlgorithm !== void 0 ? digestAlgorithm : (digestAlgorithm = 'sha256');
- if (digestAlgorithm !== 'sha256' &&
- digestAlgorithm !== 'sha384' &&
- digestAlgorithm !== 'sha512') {
- throw new TypeError('digestAlgorithm must one of "sha256", "sha384", or "sha512"');
- }
- let components;
- switch (jwk.kty) {
- case 'EC':
- check(jwk.crv, '"crv" (Curve) Parameter');
- check(jwk.x, '"x" (X Coordinate) Parameter');
- check(jwk.y, '"y" (Y Coordinate) Parameter');
- components = { crv: jwk.crv, kty: jwk.kty, x: jwk.x, y: jwk.y };
- break;
- case 'OKP':
- check(jwk.crv, '"crv" (Subtype of Key Pair) Parameter');
- check(jwk.x, '"x" (Public Key) Parameter');
- components = { crv: jwk.crv, kty: jwk.kty, x: jwk.x };
- break;
- case 'RSA':
- check(jwk.e, '"e" (Exponent) Parameter');
- check(jwk.n, '"n" (Modulus) Parameter');
- components = { e: jwk.e, kty: jwk.kty, n: jwk.n };
- break;
- case 'oct':
- check(jwk.k, '"k" (Key Value) Parameter');
- components = { k: jwk.k, kty: jwk.kty };
- break;
- default:
- throw new JOSENotSupported('"kty" (Key Type) Parameter missing or unsupported');
- }
- const data = encoder.encode(JSON.stringify(components));
- return base64url(await digest(digestAlgorithm, data));
- }
- export async function calculateJwkThumbprintUri(jwk, digestAlgorithm) {
- digestAlgorithm !== null && digestAlgorithm !== void 0 ? digestAlgorithm : (digestAlgorithm = 'sha256');
- const thumbprint = await calculateJwkThumbprint(jwk, digestAlgorithm);
- return `urn:ietf:params:oauth:jwk-thumbprint:sha-${digestAlgorithm.slice(-3)}:${thumbprint}`;
- }
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