1 files changed, 38 insertions, 0 deletions
diff --git a/cmd/sigsum-debug/hashleaf/hashleaf.go b/cmd/sigsum-debug/hashleaf/hashleaf.go
new file mode 100644
index 0000000..00f8bbb
--- /dev/null
+++ b/cmd/sigsum-debug/hashleaf/hashleaf.go
@@ -0,0 +1,38 @@
+package hashleaf
+
+import (
+	"crypto/ed25519"
+	"fmt"
+
+	"git.sigsum.org/sigsum-go/pkg/hex"
+	"git.sigsum.org/sigsum-go/pkg/types"
+	"git.sigsum.org/sigsum-tools-go/internal/util"
+)
+
+func Main(_ []string, optPriv string, optShardHint uint64) error {
+	data, err := util.BytesFromStdin()
+	if err != nil {
+		return fmt.Errorf("sign: %v", err)
+	}
+	priv, err := util.SignerFromHex(optPriv)
+	if err != nil {
+		return fmt.Errorf("sign: %v", err)
+	}
+	stm := types.Statement{
+		ShardHint: optShardHint,
+		Checksum:  *types.HashFn(data),
+	}
+	sig, err := stm.Sign(priv)
+	if err != nil {
+		fmt.Errorf("sign: %v", err)
+	}
+	leaf := types.Leaf{
+		Statement: stm,
+		Signature: *sig,
+		KeyHash:   *types.HashFn(priv.Public().(ed25519.PublicKey)[:]),
+	}
+	lh := types.LeafHash(leaf.ToBinary())
+
+	fmt.Printf("%s\n", hex.Serialize(lh[:]))
+	return nil
+}