55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
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import { KeyObject } from 'node:crypto';
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import { JOSENotSupported } from '../util/errors.js';
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import { isCryptoKey } from './webcrypto.js';
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import isKeyObject from './is_key_object.js';
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import invalidKeyInput from '../lib/invalid_key_input.js';
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import { types } from './is_key_like.js';
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export const weakMap = new WeakMap();
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const namedCurveToJOSE = (namedCurve) => {
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switch (namedCurve) {
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case 'prime256v1':
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return 'P-256';
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case 'secp384r1':
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return 'P-384';
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case 'secp521r1':
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return 'P-521';
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case 'secp256k1':
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return 'secp256k1';
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default:
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throw new JOSENotSupported('Unsupported key curve for this operation');
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}
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};
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const getNamedCurve = (kee, raw) => {
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let key;
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if (isCryptoKey(kee)) {
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key = KeyObject.from(kee);
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}
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else if (isKeyObject(kee)) {
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key = kee;
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}
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else {
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throw new TypeError(invalidKeyInput(kee, ...types));
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}
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if (key.type === 'secret') {
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throw new TypeError('only "private" or "public" type keys can be used for this operation');
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}
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switch (key.asymmetricKeyType) {
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case 'ed25519':
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case 'ed448':
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return `Ed${key.asymmetricKeyType.slice(2)}`;
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case 'x25519':
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case 'x448':
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return `X${key.asymmetricKeyType.slice(1)}`;
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case 'ec': {
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let namedCurve = key.asymmetricKeyDetails.namedCurve;
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if (raw) {
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return namedCurve;
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}
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return namedCurveToJOSE(namedCurve);
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}
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default:
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throw new TypeError('Invalid asymmetric key type for this operation');
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}
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};
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export default getNamedCurve;
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