Merge branch 'security_helper_sss' into 'master'

security helper

See merge request !36

securityhelper/securityHelper.go

@@ -6,8 +6,10 @@ import (
 	"crypto/cipher"
 	"crypto/md5"
 	"encoding/base64"
+	"errors"
 
 	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/coreospackage/filehelper"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/coreospackage/logginghelper"
 
 	OneOfOne "github.com/OneOfOne/xxhash"
 )
@@ -68,6 +70,10 @@ func AESDecrypt(encodedData, key []byte) ([]byte, error) {
 	cbc.CryptBlocks(cipherText, cipherText)
 
 	length := len(cipherText)
+	if length < 1 {
+		logginghelper.LogError("length of cipherText is less than 1")
+		return nil, errors.New("length of cipherText is less than 1")
+	}
 
 	unpadding := int(cipherText[length-1])