ngtcp2_conn_set_retry_aead
==========================

Synopsis
--------

*#include <ngtcp2/ngtcp2.h>*

.. function:: void ngtcp2_conn_set_retry_aead(ngtcp2_conn *conn, const ngtcp2_crypto_aead *aead, const ngtcp2_crypto_aead_ctx *aead_ctx)

    
    `ngtcp2_conn_set_retry_aead` sets *aead* and *aead_ctx* for Retry
    integrity tag verification.  *aead* must be AEAD_AES_128_GCM.
    *aead_ctx* must be initialized with :macro:`NGTCP2_RETRY_KEY` as
    encryption key.  This function must be called if *conn* is
    initialized as client.  Server does not verify the tag, and has no
    need to call this function.
    
    *conn* takes ownership of *aead_ctx*.
    :member:`ngtcp2_callbacks.delete_crypto_aead_ctx` will be called to
    delete this object when it is no longer used.