CryptoPassphrase  Diff

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/*
 * Copyright (c) 2016, Jonathan Schleifer <js@heap.zone>
 * Copyright (c) 2016, 2017, Jonathan Schleifer <js@heap.zone>
 *
 * https://heap.zone/git/scrypt-pwgen.git
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice is present in all copies.
 *
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	if (_legacy)
		generator = [LegacyPasswordGenerator generator];
	else
		generator = [NewPasswordGenerator generator];

	generator.site = _name;
	generator.length = _length;

	if (_keyFile != nil) {
		NSString *documentDirectory;
		OFString *keyFilePath;

		if ((documentDirectory = NSSearchPathForDirectoriesInDomains(
		    NSDocumentDirectory, NSUserDomainMask, YES).firstObject) ==
		    nil) {
			NSLog(@"Could not get key files: No documents "
			    @"directory");
			return;
		}

		keyFilePath = [documentDirectory.OFObject
		    stringByAppendingPathComponent: _keyFile];
		generator.keyFile = [OFMutableData
		    dataWithContentsOfFile: keyFilePath];
	}

	passphrase = of_strdup(self.passphraseField.text.UTF8String);
	generator.passphrase = passphrase;

	mainStoryboard = [UIStoryboard storyboardWithName: @"Main"
						   bundle: nil];
	activityController = [mainStoryboard
	    instantiateViewControllerWithIdentifier: @"activityIndicator"];
	[self.navigationController.view addSubview: activityController.view];

	dispatch_async(dispatch_get_global_queue(
	    DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^ {
		@try {
			[generator derivePassword];
		} @finally {
			if (generator.keyFile != nil)
				of_explicit_memset(
				    (void *)generator.keyFile.items, 0,
				    generator.keyFile.count);

			of_explicit_memset(passphrase, 0, strlen(passphrase));
			free(passphrase);
		}

		NSMutableString *password = [[[NSMutableString alloc]
		    initWithBytes: (char *)generator.output
			   length: generator.length