iOS / Security.Framework的CRL和OCSP行为？

SecTrustRef

SecTrustRef trust = ...; // from TLS challenge
CFArrayRef oldPolicies;
SecTrustCopyPolicies(trust, &oldPolicies);
SecPolicyRef revocationPolicy = SecPolicyCreateRevocation(kSecRevocationCRLMethod);
NSArray *newPolicies = [(__bridge NSArray *)oldPolicies arrayByAddingObject(__bridge id)revocationPolicy];
CFRelease(oldPolicies);
SecTrustSetPolicies(trust, (__bridge CFArrayRef)newPolicies);
SecTrustSetNetworkFetchAllowed(trust, true);

// Check the trust object
SecTrustResult result = kSecTrustResultInvalid;
SecTrustEvaluate(trust, &result);
// cert revoked -> kSecTrustResultRecoverableTrustFailure

SecTrustSetNetworkFetchAllowed

SecTrustEvaluate

kSecTrustResultUnspecified

SecPolicyRef policy = SecPolicyCreateRevocation(kSecRevocationOCSPMethod)
SecTrustSetPolicies(trust, policy);
SecTrustResultType trustResultType = kSecTrustResultInvalid;
OSStatus status = SecTrustEvaluate(trust, &trustResultType);
if (status == errSecSuccess && trustResultType == kSecTrustResultProceed)
{
   //good!
}
else
{
   //not good
}