DES_MAXBITS
#define DES_MAXBYTES (DES_MAXBITS / 8)
#define DES2_MAXBITS (2 * DES_MAXBITS)
#define DES3_MAXBITS (3 * DES_MAXBITS)
if (strength == DES && key->ck_length != DES_MAXBITS)
if (key->ck_length != DES_MAXBITS)