// name of the secretKey.
//
// The returned DEK is encrypted using AES-GCM and the ciphertext format is compatible
// with KES and MinKMS.
func (s secretKey) GenerateKey(_ context.Context, req *GenerateKeyRequest) (DEK, error) {
	if req.Name != s.keyID {
		return DEK{}, ErrKeyNotFound
	}
	associatedData, err := req.AssociatedData.MarshalText()
	if err != nil {
		return DEK{}, err
	}

	const randSize = 28

	dek, err := c.client.GenerateKey(ctx, name, aad)
	if err != nil {
		if errors.Is(err, kes.ErrKeyNotFound) {
			return DEK{}, ErrKeyNotFound
		}
		if errors.Is(err, kes.ErrNotAllowed) {
			return DEK{}, ErrPermission
		}
		return DEK{}, errKeyGenerationFailed(err)
	}
	return DEK{
		KeyID:      name,
		Plaintext:  dek.Plaintext,
		Ciphertext: dek.Ciphertext,
	}, nil
}

		AssociatedData: aad,
		Length:         32,
	})
	if err != nil {
		if errors.Is(err, kms.ErrKeyNotFound) {
			return DEK{}, ErrKeyNotFound
		}
		if errors.Is(err, kms.ErrPermission) {
			return DEK{}, ErrPermission
		}
		return DEK{}, errKeyGenerationFailed(err)
	}

	return DEK{
		KeyID:      name,
		Version:    resp[0].Version,
		Plaintext:  resp[0].Plaintext,
		Ciphertext: resp[0].Ciphertext,

var dekEncodeDecodeTests = []struct {
	Key DEK
}{
	{
		Key: DEK{},
	},
	{
		Key: DEK{
			Plaintext:  nil,
			Ciphertext: mustDecodeB64("eyJhZWFkIjoiQUVTLTI1Ni1HQ00tSE1BQy1TSEEtMjU2IiwiaXYiOiJ3NmhLUFVNZXVtejZ5UlVZL29pTFVBPT0iLCJub25jZSI6IktMSEU3UE1jRGo2N2UweHkiLCJieXRlcyI6Ik1wUkhjQWJaTzZ1Sm5lUGJGcnpKTkxZOG9pdkxwTmlUcTNLZ0hWdWNGYkR2Y0RlbEh1c1lYT29zblJWVTZoSXIifQ=="),
		},
	},
	{
		Key: DEK{

	// not exist.
	//
	// The context is associated and tied to the generated DEK.
	// The same context must be provided when the generated key
	// should be decrypted. Therefore, it is the callers
	// responsibility to remember the corresponding context for
	// a particular DEK. The context may be nil.
	GenerateKey(context.Context, *GenerateKeyRequest) (DEK, error)

	// DecryptKey decrypts the ciphertext with the key referenced

mert
mely
melyek
mi
mit
míg
miért
milyen
mikor
minden
mindent
mindenki
mindig
mint
mintha
mivel
most
nagy
nagyobb
nagyon
ne
néha
nekem
neki
nem
néhány
nélkül
nincs
olyan
ott
össze
ő
ők
őket
pedig
persze
rá
s
saját
sem
semmi
sok
sokat
sokkal
számára
szemben
szerint

	return nil
}

// GenerateKey is a non-functional stub.
func (s StubKMS) GenerateKey(_ context.Context, req *GenerateKeyRequest) (DEK, error) {
	if !s.containsKeyName(req.Name) {
		return DEK{}, ErrKeyNotFound
	}
	return DEK{
		KeyID:      req.Name,
		Version:    0,
		Plaintext:  []byte("stubplaincharswhichare32bytelong"),
		Ciphertext: []byte("stubplaincharswhichare32bytelong"),
	}, nil

	// MetaKeyID is the KMS master key ID used to generate/encrypt the data
	// encryption key (DEK).
	MetaKeyID = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id"
	// MetaDataEncryptionKey is the sealed data encryption key (DEK) received from
	// the KMS.
	MetaDataEncryptionKey = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key"

    # Bir hata döndür
    ...
```

Ancak `secrets.compare_digest()` kullanarak, "timing attacks" denilen bir saldırı türüne karşı güvenli olursunuz.

### Timing Attacks { #timing-attacks }

Peki "timing attack" nedir?

Bazı saldırganların kullanıcı adı ve şifreyi tahmin etmeye çalıştığını düşünelim.

Ve `johndoe` kullanıcı adı ve `love123` şifresi ile bir request gönderiyorlar.

kQyKGUTpDbKLuyYMFsoH73YLjBqNe+UEhPwE+FWpcky1Sp9RTx/oMLpiZaPR
-----END CERTIFICATE-----`,
		shouldFail: true,
	},
	{
		password: "foobar",
		privateKey: `-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-128-CBC,CC483BF11678C35F9F02A1AD85DAE285

nMDFd+Qxk1f+S7LwMitmMofNXYNbCY4L1QEqPOOx5wnjNF1wSxmEkL7+h8W4Y/vb
AQt/7TCcUSuSqEMl45nUIcCbhBos5wz+ShvFiez3qKwmR5HSURvqyN6PIJeAbU+h