packages/shared/lib/webauthn/create.ts

   1 import { arrayToBinaryString, encodeBase64 } from '@proton/crypto/lib/utils';
   2
   3 import type {
   4     PublicKeyCredentialCreationOptionsSerialized,
   5     RegisterCredentials,
   6     RegisterCredentialsPayload,
   7 } from './interface';
   8
   9 export * from './interface';
  10
  11 const convertCreationToExpectedFormat = (
  12     publicKey: PublicKeyCredentialCreationOptionsSerialized
  13 ): CredentialCreationOptions => {
  14     const { challenge, user, excludeCredentials, ...rest } = publicKey;
  15
  16     return {
  17         publicKey: {
  18             ...rest,
  19             challenge: new Uint8Array(challenge).buffer,
  20             user: {
  21                 ...user,
  22                 id: new Uint8Array(user.id),
  23             },
  24             excludeCredentials: excludeCredentials?.map((credentials) => ({
  25                 ...credentials,
  26                 id: new Uint8Array(credentials.id),
  27             })),
  28         },
  29     };
  30 };
  31
  32 export const getCreatePayload = async (
  33     registerCredentials: RegisterCredentials
  34 ): Promise<RegisterCredentialsPayload> => {
  35     const credentialCreationOptions = convertCreationToExpectedFormat(
  36         registerCredentials.RegistrationOptions.publicKey
  37     );
  38     const credentials = await navigator.credentials.create(credentialCreationOptions);
  39     const publicKeyCredentials = credentials as PublicKeyCredential;
  40     if (!credentials || !('rawId' in credentials) || !('attestationObject' in publicKeyCredentials.response)) {
  41         throw new Error('No credentials received');
  42     }
  43     const response = publicKeyCredentials.response as AuthenticatorAttestationResponse & {
  44         getTransports: () => string[];
  45     };
  46     return {
  47         RegistrationOptions: registerCredentials.RegistrationOptions,
  48         ClientData: response.clientDataJSON
  49             ? encodeBase64(arrayToBinaryString(new Uint8Array(response.clientDataJSON)))
  50             : null!,
  51         AttestationObject: response.attestationObject
  52             ? encodeBase64(arrayToBinaryString(new Uint8Array(response.attestationObject)))
  53             : null!,
  54         Transports: response.getTransports?.() || [],
  55         Name: '',
  56     };
  57 };