---
title: "SecCertificateCreateWithData(_:_:)"
framework: security
role: symbol
role_heading: Function
path: "security/seccertificatecreatewithdata(_:_:)"
---

# SecCertificateCreateWithData(_:_:)

Creates a certificate object from a DER representation of a certificate.

## Declaration

```swift
func SecCertificateCreateWithData(_ allocator: CFAllocator?, _ data: CFData) -> SecCertificate?
```

## Parameters

- `allocator`: The CFAllocator object you wish to use to allocate the certificate object. Pass NULL to use the default allocator.
- `data`: A DER (Distinguished Encoding Rules) representation of an X.509 certificate.

## Mentioned in

Storing a DER-Encoded X.509 Certificate

## Return Value

Return Value The newly created certificate object. In Objective-C, call the CFRelease function to release this object when you are finished with it. Returns nil if the data passed in the data parameter is not a valid DER-encoded X.509 certificate.

## Discussion

Discussion The certificate object returned by this function is used as input to other functions in the API.