Fix #185: need more detailed SSL error message

src/ios/AFNetworking/AFURLSessionManager.m

@@ -392,11 +392,11 @@ static NSString * const AFNSURLSessionTaskDidSuspendNotification = @"com.alamofi
             - On iOS 7, `__NSCFLocalSessionTask` and `__NSCFURLSessionTask` are the only two classes that have their own implementations of `resume` and `suspend`, and `__NSCFLocalSessionTask` DOES NOT CALL SUPER. This means both classes need to be swizzled.
             - On iOS 8, `NSURLSessionTask` is the only class that implements `resume` and `suspend`. This means this is the only class that needs to be swizzled.
             - Because `NSURLSessionTask` is not involved in the class hierarchy for every version of iOS, its easier to add the swizzled methods to a dummy class and manage them there.
-        
+
          Some Assumptions:
             - No implementations of `resume` or `suspend` call super. If this were to change in a future version of iOS, we'd need to handle it.
             - No background task classes override `resume` or `suspend`
-         
+
          The current solution:
             1) Grab an instance of `__NSCFLocalDataTask` by asking an instance of `NSURLSession` for a data task.
             2) Grab a pointer to the original implementation of `af_resume`
@@ -415,7 +415,7 @@ static NSString * const AFNSURLSessionTaskDidSuspendNotification = @"com.alamofi
 #pragma clang diagnostic pop
         IMP originalAFResumeIMP = method_getImplementation(class_getInstanceMethod([self class], @selector(af_resume)));
         Class currentClass = [localDataTask class];
-        
+
         while (class_getInstanceMethod(currentClass, @selector(resume))) {
             Class superClass = [currentClass superclass];
             IMP classResumeIMP = method_getImplementation(class_getInstanceMethod(currentClass, @selector(resume)));
@@ -426,7 +426,7 @@ static NSString * const AFNSURLSessionTaskDidSuspendNotification = @"com.alamofi
             }
             currentClass = [currentClass superclass];
         }
-        
+
         [localDataTask cancel];
         [session finishTasksAndInvalidate];
     }
@@ -454,7 +454,7 @@ static NSString * const AFNSURLSessionTaskDidSuspendNotification = @"com.alamofi
     NSAssert([self respondsToSelector:@selector(state)], @"Does not respond to state");
     NSURLSessionTaskState state = [self state];
     [self af_resume];
-    
+
     if (state != NSURLSessionTaskStateRunning) {
         [[NSNotificationCenter defaultCenter] postNotificationName:AFNSURLSessionTaskDidResumeNotification object:self];
     }
@@ -464,7 +464,7 @@ static NSString * const AFNSURLSessionTaskDidSuspendNotification = @"com.alamofi
     NSAssert([self respondsToSelector:@selector(state)], @"Does not respond to state");
     NSURLSessionTaskState state = [self state];
     [self af_suspend];
-    
+
     if (state != NSURLSessionTaskStateSuspended) {
         [[NSNotificationCenter defaultCenter] postNotificationName:AFNSURLSessionTaskDidSuspendNotification object:self];
     }
@@ -978,7 +978,7 @@ didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
                     disposition = NSURLSessionAuthChallengePerformDefaultHandling;
                 }
             } else {
-                disposition = NSURLSessionAuthChallengeCancelAuthenticationChallenge;
+                disposition = NSURLSessionAuthChallengeRejectProtectionSpace;
             }
         } else {
             disposition = NSURLSessionAuthChallengePerformDefaultHandling;
@@ -1025,7 +1025,7 @@ didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
                 disposition = NSURLSessionAuthChallengeUseCredential;
                 credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
             } else {
-                disposition = NSURLSessionAuthChallengeCancelAuthenticationChallenge;
+                disposition = NSURLSessionAuthChallengeRejectProtectionSpace;
             }
         } else {
             disposition = NSURLSessionAuthChallengePerformDefaultHandling;