---
title: "init(credentialIdentity:clientDataHash:userVerificationPreference:supportedAlgorithms:extensionInput:)"
framework: authenticationservices
role: symbol
role_heading: Initializer
path: "authenticationservices/aspasskeycredentialrequest/init(credentialidentity:clientdatahash:userverificationpreference:supportedalgorithms:extensioninput:)-1258o"
---

# init(credentialIdentity:clientDataHash:userVerificationPreference:supportedAlgorithms:extensionInput:)

Initializes a passkey credential request, providing additional passkey registration data.

## Declaration

```swift
convenience init(credentialIdentity: ASPasskeyCredentialIdentity, clientDataHash: Data, userVerificationPreference: ASAuthorizationPublicKeyCredentialUserVerificationPreference, supportedAlgorithms: [ASCOSEAlgorithmIdentifier], extensionInput: ASPasskeyRegistrationCredentialExtensionInput?)
```

## Parameters

- `credentialIdentity`: The identity of the requested passkey credential.
- `clientDataHash`: The hash of the client data from the passkey authentication challenge.
- `userVerificationPreference`: The relying party’s user verification preference.
- `supportedAlgorithms`: A list of cryptographic signature algorithms that the relying party supports.
- `extensionInput`: Input for any requested passkey extensions.

## Discussion

Discussion For credential assertion requests, supply an empty array for supportedAlgorithms. For credential registration requests, supply an array of one or more ASCOSEAlgorithmIdentifier values.

## See Also

### Creating passkey credential requests

- [init(credentialIdentity:clientDataHash:userVerificationPreference:supportedAlgorithms:)](authenticationservices/aspasskeycredentialrequest/init(credentialidentity:clientdatahash:userverificationpreference:supportedalgorithms:)-1jihy.md)
- [init(credentialIdentity:clientDataHash:userVerificationPreference:supportedAlgorithms:)](authenticationservices/aspasskeycredentialrequest/init(credentialidentity:clientdatahash:userverificationpreference:supportedalgorithms:)-52txr.md)
- [init(credentialIdentity:clientDataHash:userVerificationPreference:supportedAlgorithms:extensionInput:)](authenticationservices/aspasskeycredentialrequest/init(credentialidentity:clientdatahash:userverificationpreference:supportedalgorithms:extensioninput:)-9hsyv.md)