ENCTYPE_DES_CFB64
fb[CFB].fb_feed[4] = ENCTYPE_DES_CFB64;
{ "DES_CFB64", ENCTYPE_DES_CFB64,
static long i_support_encrypt = typemask(ENCTYPE_DES_CFB64)
static long i_support_decrypt = typemask(ENCTYPE_DES_CFB64)