aead, err := aeadInfo.aead(key)
	if err != nil {
		return nil, nil, err
	}

	return encapsulatedKey, &Sender{
		kem:            kem,
		aead:           aead,
		sharedSecret:   sharedSecret,
		suiteID:        suiteID,
		key:            key,
		baseNonce:      baseNonce,
		exporterSecret: exporterSecret,
	}, nil
}

func (s *Sender) nextNonce() []byte {

				t.Errorf("unexpected encapsulated key, got: %x, want %x", encap, expectedEncap)
			}
			expectedSharedSecret := mustDecodeHex(t, setup["shared_secret"])
			if !bytes.Equal(context.sharedSecret, expectedSharedSecret) {
				t.Errorf("unexpected shared secret, got: %x, want %x", context.sharedSecret, expectedSharedSecret)
			}
			expectedKey := mustDecodeHex(t, setup["key"])
			if !bytes.Equal(context.key, expectedKey) {