Add an SignedCertificateTimetampStore, making SignedCertificateTimestamp be refcounted to aid.

net/cert/signed_certificate_timestamp.cc

 // Copyright 2013 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/signed_certificate_timestamp.h"
 
 namespace net {
 
 namespace ct {
 
+bool SignedCertificateTimestamp::LessThan::operator()(
+    const scoped_refptr<SignedCertificateTimestamp>& lhs,
+    const scoped_refptr<SignedCertificateTimestamp>& rhs) const {
+  if (lhs.get() == rhs.get())
+    return false;
+  if (lhs->signature.signature_data < rhs->signature.signature_data)
+    return true;
+  if (lhs->signature.signature_data == rhs->signature.signature_data) {
+    if (lhs->log_id < rhs->log_id)
+     return true;
+    if (lhs->log_id == rhs->log_id) {
+      if (lhs->timestamp < rhs->timestamp)
+        return true;
+      if (lhs->timestamp == rhs->timestamp) {
+        if (lhs->extensions < rhs->extensions)
+          return true;
+        if (lhs->extensions == rhs->extensions)
+          return lhs->version < rhs->version;
+      }
+    }
+  }
+  return false;

[wtc, 2013/11/21 03:13:47]

Thanks for implementing this.

This is more complicated than I expected. Perhaps we should code it this way:

  if (lhs.get() == rhs.get())
    return false;
  if (lhs->signature.signature_data != rhs->signature.signature_data)
    return lhs->signature.signature_data < rhs->signature.signature_data;
  if (lhs->log_id != rhs->log_id)
    return lhs->log_id < rhs->log_id;
  if (lhs->timestamp != rhs->timestamp)
    return lhs->timestamp < rhs->timestamp;
  ...
  return lhs->version < rhs->version;

[alcutter, 2013/11/21 10:56:39]

That's a much more pleasing way of doing it, thanks.
Done.

+}
+
 SignedCertificateTimestamp::SignedCertificateTimestamp() {}
 
 SignedCertificateTimestamp::~SignedCertificateTimestamp() {}
 
 LogEntry::LogEntry() {}
 
 LogEntry::~LogEntry() {}
 
 void LogEntry::Reset() {
   type = LogEntry::LOG_ENTRY_TYPE_X509;
   leaf_certificate.clear();
   tbs_certificate.clear();
 }
 
 DigitallySigned::DigitallySigned() {}
 
 DigitallySigned::~DigitallySigned() {}
 
 }  // namespace ct
 
 }  // namespace net