Quiero comunicarme de forma segura con mi servidor y esto es lo que estoy haciendo ...

NSURLProtectionSpace *protectionSpace = [challenge protectionSpace];
SecTrustRef trust = [protectionSpace serverTrust];
NSURLCredential *credential = [NSURLCredential credentialForTrust:trust];

    SecPolicyRef myPolicy = SecPolicyCreateBasicX509();

NSArray * certs = [[NSArray alloc] initWithObjects:(id)certificate,nil]; //certificate is my server's cert.
credential = [NSURLCredential credentialForTrust:trust];

    SecTrustSetAnchorCertificates(trust,
                                  (CFArrayRef) [NSArray arrayWithObject:(id) certificate ]);    

OSStatus status = SecTrustCreateWithCertificates(certs, myPolicy, &trust);

SecTrustResultType trustResult = 0;

if (status == noErr) {
    status = SecTrustEvaluate(trust, &trustResult);
}

    NSLog(@"Trust I get: %d", trustResult);
[certs release];

if (trustResult == kSecTrustResultRecoverableTrustFailure) {
    NSLog(@"Recoverable Failure");
    CFAbsoluteTime trustTime,currentTime,timeIncrement,newTime;
    CFDateRef newDate;

    trustTime = SecTrustGetVerifyTime(trust);             
    timeIncrement = 31536000;                               
    currentTime = CFAbsoluteTimeGetCurrent();              
    newTime = currentTime - timeIncrement;                  
    if (trustTime - newTime){                               
        newDate = CFDateCreate(NULL, newTime);              
        SecTrustSetVerifyDate(trust, newDate);            
        status = SecTrustEvaluate(trust, &trustResult);   
    }
    NSLog(@"Trust again:%d", trustResult);// AGAIN kSecTrustResultRecoverableTrustFailure(5) over here

}

Cualquier persona tiene idea de por qué está sucediendo ... Parece que no se trata de la expiración del certificado (que tampoco es en realidad), pero podría ser la razón.

gracia

Alabam