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42 lines
2.0 KiB
Plaintext
42 lines
2.0 KiB
Plaintext
import { isoBase64URL, isoUint8Array } from '../helpers/iso/index.js';
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import { generateChallenge } from '../helpers/generateChallenge.js';
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/**
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* Prepare a value to pass into navigator.credentials.get(...) for authenticator authentication
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*
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* **Options:**
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*
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* @param rpID - Valid domain name (after `https://`)
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* @param allowCredentials **(Optional)** - Authenticators previously registered by the user, if any. If undefined the client will ask the user which credential they want to use
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* @param challenge **(Optional)** - Random value the authenticator needs to sign and pass back user for authentication. Defaults to generating a random value
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* @param timeout **(Optional)** - How long (in ms) the user can take to complete authentication. Defaults to `60000`
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* @param userVerification **(Optional)** - Set to `'discouraged'` when asserting as part of a 2FA flow, otherwise set to `'preferred'` or `'required'` as desired. Defaults to `"preferred"`
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* @param extensions **(Optional)** - Additional plugins the authenticator or browser should use during authentication
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*/
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export async function generateAuthenticationOptions(options) {
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const { allowCredentials, challenge = await generateChallenge(), timeout = 60000, userVerification = 'preferred', extensions, rpID, } = options;
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/**
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* Preserve ability to specify `string` values for challenges
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*/
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let _challenge = challenge;
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if (typeof _challenge === 'string') {
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_challenge = isoUint8Array.fromUTF8String(_challenge);
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}
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return {
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rpId: rpID,
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challenge: isoBase64URL.fromBuffer(_challenge),
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allowCredentials: allowCredentials?.map((cred) => {
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if (!isoBase64URL.isBase64URL(cred.id)) {
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throw new Error(`allowCredential id "${cred.id}" is not a valid base64url string`);
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}
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return {
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...cred,
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id: isoBase64URL.trimPadding(cred.id),
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type: 'public-key',
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};
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}),
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timeout,
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userVerification,
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extensions,
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};
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}
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