Go - SHA256 File

gistfile1.go

package main

import (
	
	"fmt"
	"io/ioutil"
	"encoding/hex"
	"crypto/sha256"

)

func main() {

    f, e := ioutil.ReadFile("file.txt")

    if e != nil {
        panic(e)
    }

    h := sha256.New()

    h.Write(f)

    b := h.Sum(nil)

    fmt.Println(hex.EncodeToString(b))
}