---
title: SecKeychainCallback
framework: security
role: symbol
role_heading: Type Alias
path: security/seckeychaincallback
---

# SecKeychainCallback

A customized callback function that keychain services call when a keychain event has occurred.

## Declaration

```swift
typealias SecKeychainCallback = (SecKeychainEvent, UnsafeMutablePointer<SecKeychainCallbackInfo>, UnsafeMutableRawPointer?) -> OSStatus
```

## Parameters

- `keychainEvent`: The keychain event that occurred. The type of event that can trigger your callback depends on the bit mask you passed in the eventMask parameter of the function doc://com.apple.security/documentation/Security/SecKeychainAddCallback(_:_:_:). See doc://com.apple.security/documentation/Security/SecKeychainEvent for a list of possible values.
- `info`: A pointer to a structure of type doc://com.apple.security/documentation/Security/SecKeychainCallbackInfo. This structure provides your callback with information about the keychain event.
- `context`: A pointer to application-defined storage that your application previously passed to the function doc://com.apple.security/documentation/Security/SecKeychainAddCallback(_:_:_:). You can use this value to provide information that the callback function needs in order to properly handle the event, such as an object on which the callback function should call a method.

## Return Value

Return Value A result code. See Codes.

## Discussion

Discussion You would declare your keychain callback function like this if you were to name it MyKeychainCallback: Listing 1. Declaring a keychain callback function OSStatus MyKeychainCallback (     SecKeychainEvent keychainEvent,     SecKeychainCallbackInfo *info,     void *context ); To add your callback function, use the SecKeychainAddCallback(_:_:_:) function. To remove your callback function, use the SecKeychainRemoveCallback(_:) function.