1 files changed, 48 insertions, 0 deletions
diff --git a/cmd/swarm/hash.go b/cmd/swarm/hash.go
new file mode 100644
index 000000000..0a20bea82
--- /dev/null
+++ b/cmd/swarm/hash.go
@@ -0,0 +1,48 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+// Command bzzhash computes a swarm tree hash.
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/ethereum/go-ethereum/swarm/storage"
+	"gopkg.in/urfave/cli.v1"
+)
+
+func hash(ctx *cli.Context) {
+	args := ctx.Args()
+	if len(args) < 1 {
+		log.Fatal("Usage: swarm hash <file name>")
+	}
+	f, err := os.Open(args[0])
+	if err != nil {
+		fmt.Println("Error opening file " + args[1])
+		os.Exit(1)
+	}
+
+	stat, _ := f.Stat()
+	chunker := storage.NewTreeChunker(storage.NewChunkerParams())
+	key, err := chunker.Split(f, stat.Size(), nil, nil, nil)
+	if err != nil {
+		log.Fatalf("%v\n", err)
+	} else {
+		fmt.Printf("%v\n", key)
+	}
+}