DTHE_AES_CCM
if (ctx->aes_mode == DTHE_AES_CCM) {
(ctx->aes_mode == DTHE_AES_CCM && req->assoclen > DTHE_AES_CCM_AAD_MAXLEN) ||
(ctx->aes_mode == DTHE_AES_CCM && cryptlen == 0) ||
(ctx->aes_mode == DTHE_AES_CCM && !is_zero_ctr))
case DTHE_AES_CCM:
ctx->aes_mode = DTHE_AES_CCM;