Syntax
         
         
            + 
            (
            NSInteger
            ) 
            
               retrieveCertificateWithUrl
            
            : 
            (
            NSURL *
            ) 
            url 
            
               andPrivateKey
            
            : 
            (
            SecKeyRef
            ) 
            privateKey 
            
               andPublicKey
            
            : 
            (
            SecKeyRef
            ) 
            publicKey 
            
               andCommonName
            
            : 
            (
            NSString *
            ) 
            commonName 
            
               andChallenge
            
            : 
            (
            NSString *
            ) 
            challengeCode 
            
               inCertificate
            
            : 
            (
            SecCertificateRef *
            ) 
            certificate