X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=internal%2Fgost34112012%2Fhash.go;h=f50b3c15235fc2337a870e997f75cba088bf3b4d;hb=c40d1e5634cf6d540d908a57423f4b504e39f186;hp=5f6b707d87a05a001326d464693406e10aa60672;hpb=c07494bbd559b9d00f391e28cfd070e18afe9900;p=gogost.git

diff --git a/internal/gost34112012/hash.go b/internal/gost34112012/hash.go
index 5f6b707..f50b3c1 100644
--- a/internal/gost34112012/hash.go
+++ b/internal/gost34112012/hash.go
@@ -1,5 +1,5 @@
 // GoGOST -- Pure Go GOST cryptographic functions library
-// Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+// Copyright (C) 2015-2020 Sergey Matveev <stargrave@stargrave.org>
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@ import (
 	"bytes"
 	"encoding/binary"
 	"errors"
+	"fmt"
 )
 
 const (
@@ -426,11 +427,12 @@ func (h *Hash) MarshalBinary() (data []byte, err error) {
 }
 
 func (h *Hash) UnmarshalBinary(data []byte) error {
-	if len(data) < len(MarshaledName)+1+8+3*BlockSize {
-		return errors.New("too short data")
+	expectedLen := len(MarshaledName) + 1 + 8 + 3*BlockSize
+	if len(data) < expectedLen {
+		return fmt.Errorf("gogost/internal/gost34112012: len(data) != %d", expectedLen)
 	}
 	if !bytes.HasPrefix(data, []byte(MarshaledName)) {
-		return errors.New("no hash name prefix")
+		return errors.New("gogost/internal/gost34112012: no hash name prefix")
 	}
 	idx := len(MarshaledName)
 	h.size = int(data[idx])