fixed password input

src/interface.go

@@ -57,18 +57,22 @@ func ReadPassword(buff *string) error {
 		}
 		chr := string(b[0])
 		if chr == "\r" || chr == "\n" {
+			fmt.Printf("\n\r")
 			return nil
 		} else if chr == "\b" || b[0] == 127 {
+			if len(*buff) > 0 {
 				fmt.Print("\033[1D \033[1D")
-			tmp := string(*buff)
-			*buff = tmp[:len(tmp)-1]
+				*buff = string(*buff)[:len(*buff)-1]
 			}
+		} else {
+			*buff += chr
 			if safeChar == "off" {
 				fmt.Print(chr)
 			} else {
 				fmt.Print(safeChar)
 			}
-		*buff += chr
+		}
+
 	}
 	return nil
 }