1/* 2** Zabbix 3** Copyright (C) 2001-2021 Zabbix SIA 4** 5** This program is free software; you can redistribute it and/or modify 6** it under the terms of the GNU General Public License as published by 7** the Free Software Foundation; either version 2 of the License, or 8** (at your option) any later version. 9** 10** This program is distributed in the hope that it will be useful, 11** but WITHOUT ANY WARRANTY; without even the implied warranty of 12** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13** GNU General Public License for more details. 14** 15** You should have received a copy of the GNU General Public License 16** along with this program; if not, write to the Free Software 17** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 18**/ 19 20package file 21 22import ( 23 "crypto/md5" 24 "errors" 25 "fmt" 26 "io" 27 "time" 28) 29 30func (p *Plugin) exportMd5sum(params []string) (result interface{}, err error) { 31 if len(params) > 1 { 32 return nil, errors.New("Too many parameters.") 33 } 34 if len(params) == 0 || params[0] == "" { 35 return nil, errors.New("Invalid first parameter.") 36 } 37 38 start := time.Now() 39 40 file, err := stdOs.Open(params[0]) 41 if err != nil { 42 return nil, fmt.Errorf("Cannot open file: %s", err) 43 } 44 defer file.Close() 45 46 var bnum int64 47 bnum = 16 * 1024 48 buf := make([]byte, bnum) 49 50 hash := md5.New() 51 52 for bnum > 0 { 53 bnum, _ = io.CopyBuffer(hash, file, buf) 54 if time.Since(start) > time.Duration(p.options.Timeout)*time.Second { 55 return nil, errors.New("Timeout while processing item") 56 } 57 } 58 59 return fmt.Sprintf("%x", hash.Sum(nil)), nil 60 61} 62