Merge remote-tracking branch 'origin/release-2.0-hb' into release-2.0-hb

# Conflicts:
#	credential/work_js_ticket.go
#	work/js/js.go
#	work/message/reply.go
#	work/server/error.go
#	work/server/server.go
#	work/server/util.go

util/signature.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"bytes"
 	"crypto/sha1"
 	"fmt"
 	"io"
@@ -16,3 +17,16 @@ func Signature(params ...string) string {
 	}
 	return fmt.Sprintf("%x", h.Sum(nil))
 }
+
+func CalSignature(params ...string) string {
+	sort.Strings(params)
+	var buffer bytes.Buffer
+	for _, value := range params {
+		buffer.WriteString(value)
+	}
+
+	sha := sha1.New()
+	sha.Write(buffer.Bytes())
+	signature := fmt.Sprintf("%x", sha.Sum(nil))
+	return string(signature)
+}