java.lang.Object
- com.yubico.fido.metadata.FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step4

Enclosing class:

FidoMetadataDownloader.FidoMetadataDownloaderBuilder
```
public static class FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step4
extends java.lang.Object
```
Step 4: Configure how to fetch the FIDO Metadata Service metadata BLOB.
This step offers three mutually exclusive options:
1. Use the default download URL. This is the main intended use case. See useDefaultBlob().
2. Use a custom download URL. This is for future-proofing in case the BLOB download URL changes and there is no new release of this library. See downloadBlob(URL).
3. Use a pre-retrieved BLOB. The signature will still be verified, but it is up to you to renew it when appropriate and perform any caching as desired. See useBlob(String).

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step5`	`downloadBlob(@NonNull java.net.URL url)`	Download the metadata BLOB from the given HTTPS `url`.
`FidoMetadataDownloader.FidoMetadataDownloaderBuilder`	`useBlob(@NonNull java.lang.String blobJwt)`	Use the given metadata BLOB; never download it.
`FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step5`	`useDefaultBlob()`	Download the metadata BLOB from a hard-coded URL.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - useDefaultBlob
```
public FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step5 useDefaultBlob()
```
    Download the metadata BLOB from a hard-coded URL.
    This is an alias of downloadBlob(new URL("https://mds.fidoalliance.org/")).
    This is the current FIDO Metadata Service BLOB download URL at the time of this library release.
    
    See Also:
    
    downloadBlob(URL)
  - downloadBlob
```
public FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step5 downloadBlob(@NonNull
                                                                               @NonNull java.net.URL url)
```
    Download the metadata BLOB from the given HTTPS url.
    The BLOB will be downloaded if it does not exist in the cache, or if the nextUpdate property of the cached BLOB is the current date or earlier.
    If the BLOB is downloaded, it is also written to the cache File or Consumer configured in the previous step.
    
    Parameters:
    
    url - the HTTP URL to download. It MUST use the https: scheme.
  - useBlob
```
public FidoMetadataDownloader.FidoMetadataDownloaderBuilder useBlob(@NonNull
                                                                    @NonNull java.lang.String blobJwt)
```
    Use the given metadata BLOB; never download it.
    The blob signature and trust chain will still be verified, but it is the caller's responsibility to renew the metadata BLOB according to the FIDO Metadata Service specification.
    
    Parameters:
    
    blobJwt - the Metadata BLOB in JWT format as defined in FIDO Metadata Service §3.1.7. Metadata BLOB. The byte array should not be Base64-decoded.
    
    See Also:
    
    FIDO Metadata Service §3.1.7. Metadata BLOB, FIDO Metadata Service §3.2. Metadata BLOB object processing rules

Class FidoMetadataDownloader.FidoMetadataDownloaderBuilder.Step4

Method Summary

Methods inherited from class java.lang.Object

Method Detail

useDefaultBlob

downloadBlob

useBlob