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//
// ISPPinnedNSURLConnectionDelegate.m
// SSLCertificatePinning
//
// Created by Alban Diquet on 1/14/14.
// Copyright (c) 2014 iSEC Partners. All rights reserved.
//
#import "ISPPinnedNSURLConnectionDelegate.h"
#import "ISPCertificatePinning.h"
@implementation ISPPinnedNSURLConnectionDelegate
- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
SecTrustRef serverTrust = [[challenge protectionSpace] serverTrust];
NSString *domain = [[challenge protectionSpace] host];
SecTrustResultType trustResult;
// Validate the certificate chain with the device's trust store anyway
// This *might* give use revocation checking
SecTrustEvaluate(serverTrust, &trustResult);
if (trustResult == kSecTrustResultUnspecified) {
// Look for a pinned certificate in the server's certificate chain
if ([ISPCertificatePinning verifyPinnedCertificateForTrust:serverTrust andDomain:domain]) {
// Found the certificate; continue connecting
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]
forAuthenticationChallenge:challenge];
}
else {
// The certificate wasn't found in the certificate chain; cancel the connection
[[challenge sender] cancelAuthenticationChallenge: challenge];
}
}
else {
// Certificate chain validation failed; cancel the connection
[[challenge sender] cancelAuthenticationChallenge: challenge];
}
}
}
@end
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