GenerateSecureEnclaveKeys.swift

func generateSecureEnclaveKey() -> SecKey? {
    let attributes: [String: Any] = [
        // key id
        kSecAttrApplicationTag as String: "com.cardosoedgar.key",
        // key size
        kSecAttrKeySizeInBits as String: 256,
        // key type
        kSecAttrKeyType as String: kSecAttrKeyTypeECSECPrimeRandom,
        // attribute to specify this key should be stored on Secure Enclave
        kSecAttrTokenID as String: kSecAttrTokenIDSecureEnclave
    ]

    var error: Unmanaged<CFError>?

    guard let ref = SecKeyCreateRandomKey(attributes as CFDictionary, &error) else {
        print(error.debugDescription)
        return nil
    }

    return ref
}