sha256

package main

import (
    "fmt"
    "crypto/sha256"
	"encoding/hex"
)

func main() {
    fmt.Println(mysha256("123456"))
}

func mysha256(str string) string {
    h := sha256.New()
	h.Write([]byte(str))
	md := h.Sum(nil)
	return hex.EncodeToString(md)
}