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- import bogusWebCrypto from './bogus.js';
- import crypto, { isCryptoKey } from './webcrypto.js';
- import { checkEncCryptoKey } from '../lib/crypto_key.js';
- import invalidKeyInput from '../lib/invalid_key_input.js';
- import { types } from './is_key_like.js';
- function checkKeySize(key, alg) {
- if (key.algorithm.length !== parseInt(alg.slice(1, 4), 10)) {
- throw new TypeError(`Invalid key size for alg: ${alg}`);
- }
- }
- function getCryptoKey(key, alg, usage) {
- if (isCryptoKey(key)) {
- checkEncCryptoKey(key, alg, usage);
- return key;
- }
- if (key instanceof Uint8Array) {
- return crypto.subtle.importKey('raw', key, 'AES-KW', true, [usage]);
- }
- throw new TypeError(invalidKeyInput(key, ...types, 'Uint8Array'));
- }
- export const wrap = async (alg, key, cek) => {
- const cryptoKey = await getCryptoKey(key, alg, 'wrapKey');
- checkKeySize(cryptoKey, alg);
- const cryptoKeyCek = await crypto.subtle.importKey('raw', cek, ...bogusWebCrypto);
- return new Uint8Array(await crypto.subtle.wrapKey('raw', cryptoKeyCek, cryptoKey, 'AES-KW'));
- };
- export const unwrap = async (alg, key, encryptedKey) => {
- const cryptoKey = await getCryptoKey(key, alg, 'unwrapKey');
- checkKeySize(cryptoKey, alg);
- const cryptoKeyCek = await crypto.subtle.unwrapKey('raw', encryptedKey, cryptoKey, 'AES-KW', ...bogusWebCrypto);
- return new Uint8Array(await crypto.subtle.exportKey('raw', cryptoKeyCek));
- };
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