---
title: kSecOIDX509V3CertificateExtensionCStruct
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecoidx509v3certificateextensioncstruct
---

# kSecOIDX509V3CertificateExtensionCStruct

## Declaration

```swift
let kSecOIDX509V3CertificateExtensionCStruct: CFString
```