From 47bacfd5c5d22470340e0823c4ad37b45914b68e Mon Sep 17 00:00:00 2001
From: Rasmus Dahlberg <rasmus.dahlberg@kau.se>
Date: Sun, 6 Jun 2021 15:59:35 +0200
Subject: started using the refactored packages in siglog server

---
 pkg/trillian/util.go | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 pkg/trillian/util.go

(limited to 'pkg/trillian/util.go')

diff --git a/pkg/trillian/util.go b/pkg/trillian/util.go
new file mode 100644
index 0000000..4cf31fb
--- /dev/null
+++ b/pkg/trillian/util.go
@@ -0,0 +1,33 @@
+package trillian
+
+import (
+	"fmt"
+
+	trillian "github.com/google/trillian/types"
+	siglog "github.com/system-transparency/stfe/pkg/types"
+)
+
+func treeHeadFromLogRoot(lr *trillian.LogRootV1) *siglog.TreeHead {
+	var hash [siglog.HashSize]byte
+	th := siglog.TreeHead{
+		Timestamp: uint64(lr.TimestampNanos / 1000 / 1000 / 1000),
+		TreeSize:  uint64(lr.TreeSize),
+		RootHash:  &hash,
+	}
+	copy(th.RootHash[:], lr.RootHash)
+	return &th
+}
+
+func nodePathFromHashes(hashes [][]byte) ([]*[siglog.HashSize]byte, error) {
+	var path []*[siglog.HashSize]byte
+	for _, hash := range hashes {
+		if len(hash) != siglog.HashSize {
+			return nil, fmt.Errorf("unexpected hash length: %v", len(hash))
+		}
+
+		var h [siglog.HashSize]byte
+		copy(h[:], hash)
+		path = append(path, &h)
+	}
+	return path, nil
+}
-- 
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