Delphi DLL Requires Chilkat v10.1.0+

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. Delphi DLL

var
success: Boolean;
secrets: HCkSecrets;
json: HCkJsonObject;
jsonSecret: HCkJsonObject;

begin
success := False;

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

secrets := CkSecrets_Create();

//  The default value of AutoSplit is 1.
//  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.
CkSecrets_putAutoSplit(secrets,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.)
CkSecrets_putLocation(secrets,'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.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'appName','AA_MyApp');
CkJsonObject_UpdateString(json,'service','OAuth2');
CkJsonObject_UpdateString(json,'domain','onedrive');
CkJsonObject_UpdateString(json,'username','matt');

//  Get the secret to be stored.
jsonSecret := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonSecret,'qa_data/tokens/oneDrive.json');
if (success = False) then
  begin
    Memo1.Lines.Add(CkJsonObject__lastErrorText(jsonSecret));
    Exit;
  end;

//  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 := CkSecrets_UpdateSecretJson(secrets,json,jsonSecret);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSecrets__lastErrorText(secrets));
    Exit;
  end;

//  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.

Memo1.Lines.Add('Success');

CkSecrets_Dispose(secrets);
CkJsonObject_Dispose(json);
CkJsonObject_Dispose(jsonSecret);