Git initHEAD2.0_alphamaster2.0alpha1.0_post

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+/* mpi-internal.h  -  Internal to the Multi Precision Integers
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *	Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ *	 Actually it's the same code with only minor changes in the
+ *	 way the data is stored; this is to support the abstraction
+ *	 of an optional secure memory allocation which may be used
+ *	 to avoid revealing of sensitive data due to paging etc.
+ *	 The GNU MP Library itself is published under the LGPL;
+ *	 however I decided to publish this code under the plain GPL.
+ */
+
+#ifndef G10_MPI_INTERNAL_H
+#define G10_MPI_INTERNAL_H
+
+#include "mpi.h"
+
+/* If KARATSUBA_THRESHOLD is not already defined, define it to a
+ * value which is good on most machines.  */
+
+/* tested 4, 16, 32 and 64, where 16 gave the best performance when
+ * checking a 768 and a 1024 bit ElGamal signature.
+ * (wk 22.12.97) */
+#ifndef KARATSUBA_THRESHOLD
+#define KARATSUBA_THRESHOLD 16
+#endif
+
+/* The code can't handle KARATSUBA_THRESHOLD smaller than 2.  */
+#if KARATSUBA_THRESHOLD < 2
+#undef KARATSUBA_THRESHOLD
+#define KARATSUBA_THRESHOLD 2
+#endif
+
+
+typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
+typedef int mpi_size_t;        /* (must be a signed type) */
+
+#define ABS(x) (x >= 0 ? x : -x)
+#define MIN(l,o) ((l) < (o) ? (l) : (o))
+#define MAX(h,i) ((h) > (i) ? (h) : (i))
+#define RESIZE_IF_NEEDED(a,b) \
+    do {			   \
+	if( (a)->alloced < (b) )   \
+	    mpi_resize((a), (b));  \
+    } while(0)
+
+/* Copy N limbs from S to D.  */
+#define MPN_COPY( d, s, n) \
+    do {				\
+	mpi_size_t _i;			\
+	for( _i = 0; _i < (n); _i++ )	\
+	    (d)[_i] = (s)[_i];		\
+    } while(0)
+
+#define MPN_COPY_INCR( d, s, n) 	\
+    do {				\
+	mpi_size_t _i;			\
+	for( _i = 0; _i < (n); _i++ )	\
+	    (d)[_i] = (d)[_i];		\
+    } while (0)
+
+#define MPN_COPY_DECR( d, s, n ) \
+    do {				\
+	mpi_size_t _i;			\
+	for( _i = (n)-1; _i >= 0; _i--) \
+	   (d)[_i] = (s)[_i];		\
+    } while(0)
+
+/* Zero N limbs at D */
+#define MPN_ZERO(d, n) \
+    do {				  \
+	int  _i;			  \
+	for( _i = 0; _i < (n); _i++ )  \
+	    (d)[_i] = 0;		    \
+    } while (0)
+
+#define MPN_NORMALIZE(d, n)  \
+    do {		       \
+	while( (n) > 0 ) {     \
+	    if( (d)[(n)-1] ) \
+		break;	       \
+	    (n)--;	       \
+	}		       \
+    } while(0)
+
+#define MPN_NORMALIZE_NOT_ZERO(d, n) \
+    do {				    \
+	for(;;) {			    \
+	    if( (d)[(n)-1] )		    \
+		break;			    \
+	    (n)--;			    \
+	}				    \
+    } while(0)
+
+#define MPN_MUL_N_RECURSE(prodp, up, vp, size, tspace) \
+    do {						\
+	if( (size) < KARATSUBA_THRESHOLD )		\
+	    mul_n_basecase (prodp, up, vp, size);	\
+	else						\
+	    mul_n (prodp, up, vp, size, tspace);	\
+    } while (0);
+
+
+/* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
+ * limb not larger than (2**(2*BITS_PER_MP_LIMB))/D - (2**BITS_PER_MP_LIMB).
+ * If this would yield overflow, DI should be the largest possible number
+ * (i.e., only ones).  For correct operation, the most significant bit of D
+ * has to be set.  Put the quotient in Q and the remainder in R.
+ */
+#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
+    do {							    \
+	mpi_limb_t _q, _ql, _r; 				    \
+	mpi_limb_t _xh, _xl;					    \
+	umul_ppmm (_q, _ql, (nh), (di));			    \
+	_q += (nh);	/* DI is 2**BITS_PER_MPI_LIMB too small */  \
+	umul_ppmm (_xh, _xl, _q, (d));				    \
+	sub_ddmmss (_xh, _r, (nh), (nl), _xh, _xl);		    \
+	if( _xh ) {						    \
+	    sub_ddmmss (_xh, _r, _xh, _r, 0, (d));		    \
+	    _q++;						    \
+	    if( _xh) {						    \
+		sub_ddmmss (_xh, _r, _xh, _r, 0, (d));		    \
+		_q++;						    \
+	    }							    \
+	}							    \
+	if( _r >= (d) ) {					    \
+	    _r -= (d);						    \
+	    _q++;						    \
+	}							    \
+	(r) = _r;						    \
+	(q) = _q;						    \
+    } while (0)
+
+
+/*-- mpiutil.c --*/
+#ifdef M_DEBUG
+#define mpi_alloc_limb_space(n,f)  mpi_debug_alloc_limb_space((n),(f), M_DBGINFO( __LINE__ ) )
+#define mpi_free_limb_space(n)  mpi_debug_free_limb_space((n),  M_DBGINFO( __LINE__ ) )
+  mpi_ptr_t mpi_debug_alloc_limb_space( unsigned nlimbs, int sec, const char *info  );
+  void mpi_debug_free_limb_space( mpi_ptr_t a, const char *info );
+#else
+  mpi_ptr_t mpi_alloc_limb_space( unsigned nlimbs, int sec );
+  void mpi_free_limb_space( mpi_ptr_t a );
+#endif
+void mpi_assign_limb_space( MPI a, mpi_ptr_t ap, unsigned nlimbs );
+
+/*-- mpi-bit.c --*/
+void mpi_rshift_limbs( MPI a, unsigned int count );
+void mpi_lshift_limbs( MPI a, unsigned int count );
+
+
+/*-- mpihelp-add.c --*/
+mpi_limb_t mpihelp_add_1(mpi_ptr_t res_ptr,  mpi_ptr_t s1_ptr,
+			 mpi_size_t s1_size, mpi_limb_t s2_limb );
+mpi_limb_t mpihelp_add_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+			  mpi_ptr_t s2_ptr,  mpi_size_t size);
+mpi_limb_t mpihelp_add(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
+		       mpi_ptr_t s2_ptr, mpi_size_t s2_size);
+
+/*-- mpihelp-sub.c --*/
+mpi_limb_t mpihelp_sub_1( mpi_ptr_t res_ptr,  mpi_ptr_t s1_ptr,
+			  mpi_size_t s1_size, mpi_limb_t s2_limb );
+mpi_limb_t mpihelp_sub_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+			  mpi_ptr_t s2_ptr, mpi_size_t size);
+mpi_limb_t mpihelp_sub(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
+		       mpi_ptr_t s2_ptr, mpi_size_t s2_size);
+
+/*-- mpihelp-cmp.c --*/
+int mpihelp_cmp( mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size );
+
+/*-- mpihelp-mul.c --*/
+
+struct karatsuba_ctx {
+    struct karatsuba_ctx *next;
+    mpi_ptr_t tspace;
+    mpi_size_t tspace_size;
+    mpi_ptr_t tp;
+    mpi_size_t tp_size;
+};
+
+void mpihelp_release_karatsuba_ctx( struct karatsuba_ctx *ctx );
+
+mpi_limb_t mpihelp_addmul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+			     mpi_size_t s1_size, mpi_limb_t s2_limb);
+mpi_limb_t mpihelp_submul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+			     mpi_size_t s1_size, mpi_limb_t s2_limb);
+void mpihelp_mul_n( mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp,
+						   mpi_size_t size);
+mpi_limb_t mpihelp_mul( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t usize,
+					 mpi_ptr_t vp, mpi_size_t vsize);
+void mpih_sqr_n_basecase( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size );
+void mpih_sqr_n( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size,
+						mpi_ptr_t tspace);
+
+void mpihelp_mul_karatsuba_case( mpi_ptr_t prodp,
+				 mpi_ptr_t up, mpi_size_t usize,
+				 mpi_ptr_t vp, mpi_size_t vsize,
+				 struct karatsuba_ctx *ctx );
+
+
+/*-- mpihelp-mul_1.c (or xxx/cpu/ *.S) --*/
+mpi_limb_t mpihelp_mul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+			  mpi_size_t s1_size, mpi_limb_t s2_limb);
+
+/*-- mpihelp-div.c --*/
+mpi_limb_t mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
+						 mpi_limb_t divisor_limb);
+mpi_limb_t mpihelp_divrem( mpi_ptr_t qp, mpi_size_t qextra_limbs,
+			   mpi_ptr_t np, mpi_size_t nsize,
+			   mpi_ptr_t dp, mpi_size_t dsize);
+mpi_limb_t mpihelp_divmod_1( mpi_ptr_t quot_ptr,
+			     mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
+			     mpi_limb_t divisor_limb);
+
+/*-- mpihelp-shift.c --*/
+mpi_limb_t mpihelp_lshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
+							   unsigned cnt);
+mpi_limb_t mpihelp_rshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
+							   unsigned cnt);
+
+
+/* Define stuff for longlong.h.  */
+#define W_TYPE_SIZE BITS_PER_MPI_LIMB
+  typedef mpi_limb_t   UWtype;
+  typedef unsigned int UHWtype;
+#if defined (__GNUC__)
+  typedef unsigned int UQItype	  __attribute__ ((mode (QI)));
+  typedef	   int SItype	  __attribute__ ((mode (SI)));
+  typedef unsigned int USItype	  __attribute__ ((mode (SI)));
+  typedef	   int DItype	  __attribute__ ((mode (DI)));
+  typedef unsigned int UDItype	  __attribute__ ((mode (DI)));
+#else
+  typedef unsigned char UQItype;
+  typedef	   long SItype;
+  typedef unsigned long USItype;
+#endif
+
+#ifdef __GNUC__
+#include "mpi-inline.h"
+#endif
+
+#endif /*G10_MPI_INTERNAL_H*/