src/headers/tommath_superclass.h

/* super class file for PK algos */

/* default ... include all MPI */
#ifndef SC_RSA_1

#define LTM_ALL

#endif

/* RSA only (does not support DH/DSA/ECC) */
/* #define SC_RSA_1 */

/* For reference.... On an Athlon64 optimizing for speed...

   LTM's mpi.o with all functions [striped] is 142KiB in size.

*/

/* Works for RSA only, mpi.o is 68KiB */
#ifdef SC_RSA_1
   #define BN_MP_SHRINK_C
   #define BN_MP_LCM_C
   #define BN_MP_PRIME_RANDOM_EX_C
   #define BN_MP_INVMOD_C
   #define BN_MP_GCD_C
   #define BN_MP_MOD_C
   #define BN_MP_MULMOD_C
   #define BN_MP_ADDMOD_C
   #define BN_MP_EXPTMOD_C
   #define BN_MP_SET_INT_C
   #define BN_MP_INIT_MULTI_C
   #define BN_MP_CLEAR_MULTI_C
   #define BN_MP_UNSIGNED_BIN_SIZE_C
   #define BN_MP_TO_UNSIGNED_BIN_C
   #define BN_MP_MOD_D_C
   #define BN_MP_PRIME_RABIN_MILLER_TRIALS_C
   #define BN_REVERSE_C
   #define BN_PRIME_TAB_C

   /* other modifiers */
   #define BN_MP_DIV_SMALL                    /* Slower division, not critical */

   /* here we are on the last pass so we turn things off.  The functions classes are still there
    * but we remove them specifically from the build.  This also invokes tweaks in functions
    * like removing support for even moduli, etc...
    */
#ifdef LTM_LAST
   #undef  BN_MP_TOOM_MUL_C
   #undef  BN_MP_TOOM_SQR_C
   #undef  BN_MP_KARATSUBA_MUL_C
   #undef  BN_MP_KARATSUBA_SQR_C
   #undef  BN_MP_REDUCE_C
   #undef  BN_MP_REDUCE_SETUP_C
   #undef  BN_MP_DR_IS_MODULUS_C
   #undef  BN_MP_DR_SETUP_C
   #undef  BN_MP_DR_REDUCE_C
   #undef  BN_MP_REDUCE_IS_2K_C
   #undef  BN_MP_REDUCE_2K_SETUP_C
   #undef  BN_MP_REDUCE_2K_C
   #undef  BN_S_MP_EXPTMOD_C
   #undef  BN_MP_DIV_3_C
   #undef  BN_S_MP_MUL_HIGH_DIGS_C
   #undef  BN_FAST_S_MP_MUL_HIGH_DIGS_C
   #undef  BN_FAST_MP_INVMOD_C

   /* To safely undefine these you have to make sure your RSA key won't exceed the Comba threshold
    * which is roughly 255 digits [7140 bits for 32-bit machines, 15300 bits for 64-bit machines] 
    * which means roughly speaking you can handle upto 2536-bit RSA keys with these defined without
    * trouble.  
    */
   #undef  BN_S_MP_MUL_DIGS_C
   #undef  BN_S_MP_SQR_C
   #undef  BN_MP_MONTGOMERY_REDUCE_C
#endif

#endif

/* $Source: /cvs/libtom/libtomcrypt/src/headers/tommath_superclass.h,v $ */
/* $Revision: 1.4 $ */
/* $Date: 2005/05/14 13:27:20 $ */