From: Matt Joiner <anacrolix@gmail.com>
Date: Tue, 3 May 2016 11:34:20 +0000 (+1000)
Subject: metainfo: Add HashBytes
X-Git-Tag: v1.0.0~752
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=533f01147d6ae929f07192c32d95c6daa38d8b5c;p=btrtrc.git

metainfo: Add HashBytes
---

diff --git a/metainfo/hash.go b/metainfo/hash.go
index 58c5b7cc..1c0a0ff8 100644
--- a/metainfo/hash.go
+++ b/metainfo/hash.go
@@ -1,6 +1,7 @@
 package metainfo
 
 import (
+	"crypto/sha1"
 	"encoding/hex"
 	"fmt"
 )
@@ -34,3 +35,10 @@ func (h *Hash) FromHexString(s string) (err error) {
 	}
 	return
 }
+
+func HashBytes(b []byte) (ret Hash) {
+	hasher := sha1.New()
+	hasher.Write(b)
+	copy(ret[:], hasher.Sum(nil))
+	return
+}