Mac: Fix crash in CreateSecCertificateArrayForX509Certificate.

net/cert/x509_util_mac.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/cert/x509_util_mac.h"
 
 #include <CommonCrypto/CommonDigest.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 93 matching lines @@
       CreateSecCertificateFromBytes(CRYPTO_BUFFER_data(cert->os_cert_handle()),
                                     CRYPTO_BUFFER_len(cert->os_cert_handle())));
   if (!sec_cert)
     return base::ScopedCFTypeRef<CFMutableArrayRef>();
   CFArrayAppendValue(cert_list, sec_cert);
   for (X509Certificate::OSCertHandle intermediate :
        cert->GetIntermediateCertificates()) {
     base::ScopedCFTypeRef<SecCertificateRef> sec_cert(
         CreateSecCertificateFromBytes(CRYPTO_BUFFER_data(intermediate),
                                       CRYPTO_BUFFER_len(intermediate)));
+    if (!sec_cert)
+      return base::ScopedCFTypeRef<CFMutableArrayRef>();
     CFArrayAppendValue(cert_list, sec_cert);
   }
 #else
   X509Certificate::OSCertHandles intermediate_ca_certs =
       cert->GetIntermediateCertificates();
   CFArrayAppendValue(cert_list, cert->os_cert_handle());
   for (size_t i = 0; i < intermediate_ca_certs.size(); ++i)
     CFArrayAppendValue(cert_list, intermediate_ca_certs[i]);
 #endif
   return cert_list;
@@ skipping 286 matching lines @@
   CSSM_CL_CertAbortQuery(cl_handle_, results_handle);
   field->Reset(cl_handle_, oid, field_ptr);
   return CSSM_OK;
 }
 
 }  // namespace x509_util
 
 #pragma clang diagnostic pop  // "-Wdeprecated-declarations"
 
 }  // namespace net