HMACContext

Overview ¶

The HMACContext class is useful for advanced HMAC use cases, such as streaming the message as it supports creating the message over time rather than providing it all at once.

package main

import (
	"encoding/hex"
	"fmt"

	"graphics.gd/classdb/HMACContext"
	"graphics.gd/classdb/HashingContext"
	"graphics.gd/classdb/Node"
)

type MyHMAC struct {
	Node.Extension[MyHMAC]

	ctx HMACContext.Instance
}

func (n *MyHMAC) Ready() {
	n.ctx = HMACContext.New()

	var key = []byte("supersecret")
	var err = n.ctx.Start(HashingContext.HashSha256, key)
	if err != nil {
		panic(err)
	}
	var msg1 = []byte("this is ")
	var msg2 = []byte("super duper secret")
	err = n.ctx.Update(msg1)
	if err != nil {
		panic(err)
	}
	err = n.ctx.Update(msg2)
	if err != nil {
		panic(err)
	}
	var hmac = n.ctx.Finish()
	fmt.Println(hex.EncodeToString(hmac))
}