StoreBackEnd/pkg/utils/Hasher.go

package utils

import (
	"bufio"
	"crypto/sha256"
	"fmt"
	"io"
	"log"
	"os"
)

func HashFileCompare(path string, fingerPrint string) bool {
	sum := GenFingerPrint(path)

	return fingerPrint == fmt.Sprintf("%x", sum)
}

func GenFingerPrint(path string) []byte {
	f, err := os.Open(path)
	if err != nil {
		log.Fatal(err)
	}
	defer f.Close()

	input := bufio.NewReader(f)

	hash := sha256.New()
	if _, err := io.Copy(hash, input); err != nil {
		log.Fatal(err)
	}
	sum := hash.Sum(nil)

	return sum
}