Account for the OS returning an empty certificate chain.

net/cert/x509_certificate_unittest.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_certificate.h"
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/pickle.h"
@@ skipping 1140 matching lines @@
 }
 
 INSTANTIATE_TEST_CASE_P(, X509CertificateNameVerifyTest,
                         testing::ValuesIn(kNameVerifyTestData));
 
 const struct PublicKeyInfoTestData {
   const char* cert_file;
   size_t expected_bits;
   X509Certificate::PublicKeyType expected_type;
 } kPublicKeyInfoTestData[] = {
-  { "768-rsa-ee-by-768-rsa-intermediate.pem", 768,
-    X509Certificate::kPublicKeyTypeRSA },
-  { "1024-rsa-ee-by-768-rsa-intermediate.pem", 1024,
-    X509Certificate::kPublicKeyTypeRSA },
-  { "prime256v1-ecdsa-ee-by-1024-rsa-intermediate.pem", 256,
-    X509Certificate::kPublicKeyTypeECDSA },
+    {"768-rsa-ee-by-768-rsa-intermediate.pem",
+     768,
+     X509Certificate::kPublicKeyTypeRSA},
+    {"1024-rsa-ee-by-768-rsa-intermediate.pem",
+     1024,
+     X509Certificate::kPublicKeyTypeRSA},
+    {"prime256v1-ecdsa-ee-by-1024-rsa-intermediate.pem",
+     256,
+     X509Certificate::kPublicKeyTypeECDSA},
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+    // OS X has an key length limit of 4096 bits. This should manifest as an
+    // unknown key. If a future version of OS X changes this, large_key.pem may
+    // need to be renegerated with a larger key. See https://crbug.com/472291.
+    {"large_key.pem", 0, X509Certificate::kPublicKeyTypeUnknown},
+#else
+    {"large_key.pem", 4104, X509Certificate::kPublicKeyTypeRSA},
+#endif
 };
 
 class X509CertificatePublicKeyInfoTest
     : public testing::TestWithParam<PublicKeyInfoTestData> {
 };
 
 TEST_P(X509CertificatePublicKeyInfoTest, GetPublicKeyInfo) {
   PublicKeyInfoTestData data = GetParam();
 
 #if defined(OS_WIN)
@@ skipping 16 matching lines @@
                                     &actual_type);
 
   EXPECT_EQ(data.expected_bits, actual_bits);
   EXPECT_EQ(data.expected_type, actual_type);
 }
 
 INSTANTIATE_TEST_CASE_P(, X509CertificatePublicKeyInfoTest,
                         testing::ValuesIn(kPublicKeyInfoTestData));
 
 }  // namespace net