Certificate Transparency: Notify STH Observers of known STHs

net/cert/signed_tree_head.cc

 // Copyright 2016 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_tree_head.h"
 
 #include <string.h>
 
 #include <ostream>
 
@@ skipping 27 matching lines @@
         << "\t\"version\": " << sth.version << ",\n"
         << "\t\"timestamp\": " << sth.timestamp << ",\n"
         << "\t\"tree_size\": " << sth.tree_size << ",\n"
         << "\t\"sha256_root_hash\": \""
         << base::HexEncode(sth.sha256_root_hash, kSthRootHashLength)
         << "\",\n\t\"log_id\": \""
         << base::HexEncode(sth.log_id.data(), sth.log_id.size()) << "\"\n"
         << "}";
 }
 
+bool operator==(const SignedTreeHead& lhs, const SignedTreeHead& rhs) {
+  return std::tie(lhs.version, lhs.timestamp, lhs.tree_size, lhs.log_id) ==
+             std::tie(rhs.version, rhs.timestamp, rhs.tree_size, rhs.log_id) &&
+         memcmp(lhs.sha256_root_hash, rhs.sha256_root_hash,
+                kSthRootHashLength) == 0 &&
+         lhs.signature.SignatureParametersMatch(
+             rhs.signature.hash_algorithm, rhs.signature.signature_algorithm) &&
+         lhs.signature.signature_data == rhs.signature.signature_data;
+}
+
+bool operator!=(const SignedTreeHead& lhs, const SignedTreeHead& rhs) {
+  return !(lhs == rhs);
+}
+
 }  // namespace ct
 }  // namespace net