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-rw-r--r--libtommath/tommath_superclass.h72
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diff --git a/libtommath/tommath_superclass.h b/libtommath/tommath_superclass.h
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+/* super class file for PK algos */
+
+/* default ... include all MPI */
+#define LTM_ALL
+
+/* 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