(Objective-C) 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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#import <CkoSecrets.h>
#import <CkoJsonObject.h>

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

CkoSecrets *secrets = [[CkoSecrets alloc] init];

// The default value of AutoSplit is YES.
// 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 = YES;

// 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.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"appName" value: @"AA_MyApp"];
[json UpdateString: @"service" value: @"OAuth2"];
[json UpdateString: @"domain" value: @"onedrive"];
[json UpdateString: @"username" value: @"matt"];

// Get the secret to be stored.
CkoJsonObject *jsonSecret = [[CkoJsonObject alloc] init];
BOOL success = [jsonSecret LoadFile: @"qa_data/tokens/oneDrive.json"];
if (success == NO) {
    NSLog(@"%@",jsonSecret.LastErrorText);
    return;
}

// 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 secret: jsonSecret];
if (success == NO) {
    NSLog(@"%@",secrets.LastErrorText);
    return;
}

// 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.

NSLog(@"%@",@"Success");