Golang Code
Generating a SHA256 HMAC Hash
· 144 words · 1 minute read
Generating HMACs (Keyed-Hash Message Authentication Code) are often used as a way of proving data integrity and authenticity. They involve three integrals parts, the algorithm (in our case SHA256), the secret and the data. They a used mainly because data can be checked between two parties without the sharing of the secret.
In go, there’s a convenient library to help us out with this called crypto/hmac and we show an example of how to do this below.
package main
import (
"crypto/hmac"
"crypto/sha256"
"encoding/hex"
"fmt"
)
func main() {
secret := "mysecret"
data := "data"
fmt.Printf("Secret: %s Data: %s\n", secret, data)
// Create a new HMAC by defining the hash type and the key (as byte array)
h := hmac.New(sha256.New, []byte(secret))
// Write Data to it
h.Write([]byte(data))
// Get result and encode as hexadecimal string
sha := hex.EncodeToString(h.Sum(nil))
fmt.Println("Result: " + sha)
}
Example:
