TDES_FLAGS_OPMODE_MASK
#define TDES_FLAGS_MODE_MASK (TDES_FLAGS_OPMODE_MASK | TDES_FLAGS_ENCRYPT)
if (!err && (rctx->mode & TDES_FLAGS_OPMODE_MASK) != TDES_FLAGS_ECB)
if ((mode & TDES_FLAGS_OPMODE_MASK) != TDES_FLAGS_ECB &&