# SecCertificateCopyValues(_:_:_:) Creates a dictionary that represents a certificate’s contents. ``` func SecCertificateCopyValues(_ certificate: SecCertificate, _ keys: CFArray?, _ error: UnsafeMutablePointer?>?) -> CFDictionary? ``` ## Parameters `certificate` The certificate from which values should be copied. `keys` An array of string OID values, or `NULL`. If non-`NULL`, these OID values determine which values from the certificate to return. If `NULL`, all values are returned. Only OIDs that represent top-level keys in the returned dictionary can be specified. Unknown OIDs are ignored. See [Certificate OIDs](/documentation/Security/certificate-oids) for the list of known OIDs. `error` A pointer to a variable where an error object is stored upon failure. If not `NULL`, the caller is responsible for checking this variable and releasing the resulting object if it exists. ## Return Value A dictionary containing the specified values from the certificate or `NULL` if an error occurs. In Objective-C, free this dictionary with a call to the function when you are done with it. ## Discussion Each entry in this dictionary is itself a dictionary with the keys described in [Certificate Property Keys](/documentation/Security/certificate-property-keys). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)