rckrdmrd
97f407c661
- Prefijo v2: MCH - TRACEABILITY-MASTER.yml creado - Listo para integracion como submodulo Workspace: v2.0.0 | SIMCO: v4.0.0
26 lines
1.2 KiB
JavaScript
26 lines
1.2 KiB
JavaScript
import { checkEncCryptoKey } from './crypto_key.js';
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function checkKeySize(key, alg) {
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if (key.algorithm.length !== parseInt(alg.slice(1, 4), 10)) {
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throw new TypeError(`Invalid key size for alg: ${alg}`);
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}
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}
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function getCryptoKey(key, alg, usage) {
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if (key instanceof Uint8Array) {
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return crypto.subtle.importKey('raw', key, 'AES-KW', true, [usage]);
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}
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checkEncCryptoKey(key, alg, usage);
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return key;
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}
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export async function wrap(alg, key, cek) {
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const cryptoKey = await getCryptoKey(key, alg, 'wrapKey');
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checkKeySize(cryptoKey, alg);
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const cryptoKeyCek = await crypto.subtle.importKey('raw', cek, { hash: 'SHA-256', name: 'HMAC' }, true, ['sign']);
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return new Uint8Array(await crypto.subtle.wrapKey('raw', cryptoKeyCek, cryptoKey, 'AES-KW'));
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}
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export async function unwrap(alg, key, encryptedKey) {
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const cryptoKey = await getCryptoKey(key, alg, 'unwrapKey');
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checkKeySize(cryptoKey, alg);
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const cryptoKeyCek = await crypto.subtle.unwrapKey('raw', encryptedKey, cryptoKey, 'AES-KW', { hash: 'SHA-256', name: 'HMAC' }, true, ['sign']);
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return new Uint8Array(await crypto.subtle.exportKey('raw', cryptoKeyCek));
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}
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