(VB.NET) Windows Credentials Manager - AutoSplit Larger Secrets

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Secrets stored in the Windows Credentials Manager can be a maximum of 2560 bytes in size. If the content of the secret is too large for the Windows Credential Manager, Chilkat will automatically split the secret into parts and store a shorter JSON manifest.

Note: This example requires Chilkat v10.1.0 or later.

For more information, see https://cknotes.com/chilkat-secrets-class-added-in-version-10-1-0/

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' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim secrets As New Chilkat.Secrets

' The default value of AutoSplit is True.
' Note: AutoSplit only applies when the secret location is "local_manager"
' and the app is running on the Windows OS.  All other secret locations, such as Apple Keychain,
' AWS Secrets Manager, Azure Key Vault, etc. don't have limitations that are so small.
secrets.AutoSplit = True

' On Windows, this is the Windows Credentials Manager
' On MacOS/iOS, it is the Apple Keychain
' (This example is explaining how a secret too large for the Windows Credential Manager
' is automatically compressed and split into parts if needed.)
secrets.Location = "local_manager"

' Specify the name of the secret.
' service and username are required.
' appName and domain are optional.
' Note: The values are arbitrary and can be anything you want.
Dim json As New Chilkat.JsonObject
json.UpdateString("appName","AA_MyApp")
json.UpdateString("service","OAuth2")
json.UpdateString("domain","onedrive")
json.UpdateString("username","matt")

' Get the secret to be stored.
Dim jsonSecret As New Chilkat.JsonObject
Dim success As Boolean = jsonSecret.LoadFile("qa_data/tokens/oneDrive.json")
If (success = False) Then
    Debug.WriteLine(jsonSecret.LastErrorText)
    Exit Sub
End If


' Note: The oneDrive.json file we used for testing is 4824 bytes in size,
' which exceeds the maximum size (2560 bytes) allowed by the Windows Credentials Manager.

' When the size is too large, Chilkat will first compress the content of the secret.
' If the compressed size is small enough, then it is stored compressed without splitting.
' Otherwise the compressed data is split

' Your application does not need to know how the secret is stored in the Windows Credentials Manager.
' When fetching the secret, Chilkat automatically decompresses and re-composes from parts.

' Create or update the secret.
success = secrets.UpdateSecretJson(json,jsonSecret)
If (success = False) Then
    Debug.WriteLine(secrets.LastErrorText)
    Exit Sub
End If


' This is the auto-split secret viewed in the Windows Credentials Manager:
' 

' Note: If you delete the auto-split secret by calling Chilkat's DeleteSecret method,
' the parts are automatically deleted.
' Also, if you update the secret, the old parts are automatically deleted and new parts are created.

Debug.WriteLine("Success")