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Windows Credentials Manager - AutoSplit Larger Secrets

See more Secrets Examples

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.

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Dim success As Boolean = False

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

Dim secrets As ChilkatSecrets
secrets.Initialize("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 ChilkatJsonObject
json.Initialize
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 ChilkatJsonObject
jsonSecret.Initialize
success = jsonSecret.LoadFile("qa_data/tokens/oneDrive.json")
If success = False Then
    Log(jsonSecret.LastErrorText)
    Return
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
    Log(secrets.LastErrorText)
    Return
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.

Log("Success")