Certificate Transparency: Parse Signed Tree Heads and validate them

net/test/ct_test_util.h

Index: net/test/ct_test_util.h
diff --git a/net/test/ct_test_util.h b/net/test/ct_test_util.h
index 87afc104102d476f7642211f93faaeea52498c3b..d6fcec2d6c54f4870022ce45850f3f1407cdc479 100644
--- a/net/test/ct_test_util.h
+++ b/net/test/ct_test_util.h
@@ -15,6 +15,7 @@ namespace ct {
 
 struct LogEntry;
 struct SignedCertificateTimestamp;
+struct SignedTreeHead;
 
 // Note: unless specified otherwise, all test data is taken from Certificate
 // Transparency test data repository.
@@ -62,6 +63,12 @@ std::string GetDerEncodedFakeOCSPResponseCert();
 // The issuer of the previous cert.
 std::string GetDerEncodedFakeOCSPResponseIssuerCert();
 
+// A sample, valid STH
+void GetSignedTreeHead(SignedTreeHead* sth);
+
+// The Sha256 root hash for the sample STH
+std::string GetSampleSTHSha256RootHash();
+
 }  // namespace ct
 
 }  // namespace net