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import { isValidDomain } from './isValidDomain';
import { WebAuthnError } from './structs';
/**
* Attempt to intuit _why_ an error was raised after calling `navigator.credentials.get()`
*/
export function identifyAuthenticationError({
error,
options,
}: {
error: Error;
options: CredentialRequestOptions;
}): WebAuthnError | Error {
const { publicKey } = options;
if (!publicKey) {
throw Error('options was missing required publicKey property');
}
if (error.name === 'AbortError') {
if (options.signal === new AbortController().signal) {
// https://www.w3.org/TR/webauthn-2/#sctn-createCredential (Step 16)
return new WebAuthnError('Authentication ceremony was sent an abort signal', 'AbortError');
}
} else if (error.name === 'NotAllowedError') {
if (publicKey.allowCredentials?.length) {
// https://www.w3.org/TR/webauthn-2/#sctn-discover-from-external-source (Step 17)
// https://www.w3.org/TR/webauthn-2/#sctn-op-get-assertion (Step 6)
return new WebAuthnError(
'No available authenticator recognized any of the allowed credentials',
'NotAllowedError',
);
}
// https://www.w3.org/TR/webauthn-2/#sctn-discover-from-external-source (Step 18)
// https://www.w3.org/TR/webauthn-2/#sctn-op-get-assertion (Step 7)
return new WebAuthnError(
'User clicked cancel, or the authentication ceremony timed out',
'NotAllowedError',
);
} else if (error.name === 'SecurityError') {
const effectiveDomain = window.location.hostname;
if (!isValidDomain(effectiveDomain)) {
// https://www.w3.org/TR/webauthn-2/#sctn-discover-from-external-source (Step 5)
return new WebAuthnError(`${window.location.hostname} is an invalid domain`, 'SecurityError');
} else if (publicKey.rpId !== effectiveDomain) {
// https://www.w3.org/TR/webauthn-2/#sctn-discover-from-external-source (Step 6)
return new WebAuthnError(
`The RP ID "${publicKey.rpId}" is invalid for this domain`,
'SecurityError',
);
}
} else if (error.name === 'UnknownError') {
// https://www.w3.org/TR/webauthn-2/#sctn-op-get-assertion (Step 1)
// https://www.w3.org/TR/webauthn-2/#sctn-op-get-assertion (Step 12)
return new WebAuthnError(
'The authenticator was unable to process the specified options, or could not create a new assertion signature',
'UnknownError',
);
}
return error;
}
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