CryptoPassphrase  Check-in [af661fbcc5]

		@try {
			[generator derivePassword];
		} @finally {
			of_explicit_memset(passphrase, 0, strlen(passphrase));
			free(passphrase);
		}

		NSMutableString *password = [NSMutableString
		    stringWithUTF8String: (char *)generator.output];
		of_explicit_memset(generator.output, 0,
		NSMutableString *password = [[[NSMutableString alloc]
		    initWithBytes: (char *)generator.output
			   length: generator.length
			 encoding: NSUTF8StringEncoding] autorelease];
		of_explicit_memset(generator.output, 0, generator.length);
		    strlen((char *)generator.output));

		dispatch_sync(dispatch_get_main_queue(), ^ {
			activityController.view.hidden = YES;
			block(password);
		});
	});
}