Grrrben

func TestSignVerify(t *testing.T) {
	henk, _ := NewRsaIdentity()

	// A public message from Henk.
	// note that the message is a byte array, not just a string.
	msg := []byte("Wilders doet tenminste iets tegen de politiek.")
    
	// Henk signs the message with his private key. This will show the recipient
	// proof that this message is indeed from Henk
	sig, err := henk.Sign(msg)

Grrrben

// Sign returns a signature made by combining the message and the signers private key
// With the r.Verify function, the signature can be checked.
func (r *RsaIdentity) Sign(msg []byte) (signature []byte, err error) {
	hs := r.getHashSum(msg)
	signature, err := rsa.SignPKCS1v15(rand.Reader, r.private, crypto.SHA256, hs)
	return
}

Grrrben

func TestEncryptDecrypt(t *testing.T) {
	henk, _ := NewRsaIdentity()
	ingrid, _ := NewRsaIdentity()

	// a message from Henk to Ingrid
	msg := []byte("Die uitkeringstrekkers pikken al onze banen in.")
	// Lets encrypt it, we want to sent it to Ingrid, thus, we use her public key.
	encryptedMessage, err := henk.Encrypt(msg, ingrid.public)

	if err != nil {

Grrrben

func TestPublicKeyExample(t *testing.T) {
	henk, _ := NewRsaIdentity()
	ingrid, _ := NewRsaIdentity()

	msg := []byte("Negenennegentig procent van de problemen in de wereld worden veroorzaakt door buitenlanders.")

	// Lets encrypt it, we want to sent it to Ingrid, thus, we use her public key.
	encryptedMessage, _ := henk.Encrypt(msg, ingrid.public)

	fmt.Printf("%s\n", msg)

Grrrben

// Decrypt a message using your private key.
// A received message should be encrypted using the receivers public key.
func (r *RsaIdentity) Decrypt(msg []byte) ([]byte, error) {
	label := []byte("")
	hash := sha256.New()
	return rsa.DecryptOAEP(hash, rand.Reader, r.private, msg, label)
}