ecpubkey_todata
if (!ecpubkey_todata(ctx->sender_authkey, sender_authpub,
if (!ecpubkey_todata(sender_ephemkey, sender_pub, &sender_publen,
|| !ecpubkey_todata(ctx->recipient_key, recipient_pub,
if (!ecpubkey_todata(ctx->recipient_key, recipient_pub, &recipient_publen,