api-hash-file.go

/*
* Golang presentation
*
* @package     main
* @author      @jeffotoni
* @size        2017
 */

package gcry

import (
	"crypto/md5"
	"encoding/hex"
	"fmt"
	"io"
	"os"
)

//
func HashFile(filePath string) (string, error) {

	var returnMD5String string

	if !FileExists(filePath) {

		fmt.Println("error file not exist!")
	}

	file, err := os.Open(filePath)
	if err != nil {

		return returnMD5String, err
	}

	defer file.Close()
	hash := md5.New()
	if _, err := io.Copy(hash, file); err != nil {

		return returnMD5String, err
	}

	hashInBytes := hash.Sum(nil)[:16]

	returnMD5String = hex.EncodeToString(hashInBytes)

	return returnMD5String, nil
}