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diff libtomcrypt/src/headers/tommath_superclass.h @ 285:1b9e69c058d2

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/headers/tommath_superclass.h	Wed Mar 08 13:23:58 2006 +0000
@@ -0,0 +1,80 @@
+/* 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 $ */