/*
 Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements.  See the NOTICE file
 distributed with this work for additional information
 regarding copyright ownership.  The ASF licenses this file
 to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 */

#import "CMISStandardUntrustedSSLAuthenticationProvider.h"
#import "CMISLog.h"

@implementation CMISStandardUntrustedSSLAuthenticationProvider

- (BOOL)canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
    if ([protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
        return YES;
    }
    return [super canAuthenticateAgainstProtectionSpace:protectionSpace];
}

/**
 * NOTE: Once the TLS Session has been cached for an untrusted connection, that session will be reused
 * by iOS (since 6.0) and willSendRequestForAuthenticationChallenge: will not be called again until the session is cleared.
 * The session is cleared by an app restart or after around 10 minutes.
 * See Apple Technical Q&A QA1727 http://developer.apple.com/library/ios/#qa/qa1727 for full details.
 */
- (void)didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
    if ((challenge.previousFailureCount == 0) &&
        ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]))
    {
        CMISLogWarning(@"Allowing self-signed certificate");
        [challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
    } else {
        [super didReceiveAuthenticationChallenge:challenge];
    }
}

- (void)didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
          completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *))completionHandler
{
    if ((challenge.previousFailureCount == 0) &&
        ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]))
    {
        CMISLogWarning(@"Allowing self-signed certificate");
        completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
    } else {
        [super didReceiveChallenge:challenge completionHandler:completionHandler];
    }
}

@end