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authorFelix Lange <fjl@twurst.com>2016-11-11 06:29:52 +0800
committerFelix Lange <fjl@twurst.com>2016-11-11 07:15:21 +0800
commit8247bccf71351812cd60179c3ef0f9d596f117c1 (patch)
tree711a6f608e074df8ab514f1e269dac457ddc1fdc /cmd
parentbbf37c0404d2d189fdb0255aa70f2b4a73a81c0a (diff)
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cmd/bzzhash: add swarm hashing tool
Diffstat (limited to 'cmd')
-rw-r--r--cmd/bzzhash/main.go49
1 files changed, 49 insertions, 0 deletions
diff --git a/cmd/bzzhash/main.go b/cmd/bzzhash/main.go
new file mode 100644
index 000000000..0ae99acc0
--- /dev/null
+++ b/cmd/bzzhash/main.go
@@ -0,0 +1,49 @@
+// 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"
+ "os"
+ "runtime"
+
+ "github.com/ethereum/go-ethereum/swarm/storage"
+)
+
+func main() {
+ runtime.GOMAXPROCS(runtime.NumCPU())
+
+ if len(os.Args) < 2 {
+ fmt.Println("Usage: bzzhash <file name>")
+ os.Exit(0)
+ }
+ f, err := os.Open(os.Args[1])
+ if err != nil {
+ fmt.Println("Error opening file " + os.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 {
+ fmt.Fprintf(os.Stderr, "%v\n", err)
+ } else {
+ fmt.Printf("%v\n", key)
+ }
+}