crypto_policy_set_aes_gcm_128_8_only_auth(crypto_policy_t *p) {
  p->cipher_type     = AES_128_GCM;           
  p->cipher_key_len  = AES_128_GCM_KEYSIZE_WSALT; 
  p->auth_type       = NULL_AUTH; /* GCM handles the auth for us */ 
  p->auth_key_len    = 0; 
  p->auth_tag_len    = 8;   /* 8 octet tag length */
  p->sec_serv        = sec_serv_auth;  /* This only applies to RTCP */
}
crypto_policy_set_aes_gcm_128_8_only_auth(crypto_policy_t *p) {
  p->cipher_type     = AES_128_GCM;           
  p->cipher_key_len  = AES_128_GCM_KEYSIZE_WSALT; 
  p->auth_type       = NULL_AUTH;   
  p->auth_key_len    = 0; 
  p->auth_tag_len    = 8;    
  p->sec_serv        = sec_serv_auth;   
}