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Use secure memory interface from MP library.
[u/mdw/catacomb]
/
mp-arith.c
diff --git
a/mp-arith.c
b/mp-arith.c
index
cd6b0bd
..
f0502e1
100644
(file)
--- a/
mp-arith.c
+++ b/
mp-arith.c
@@
-1,6
+1,6
@@
/* -*-c-*-
*
/* -*-c-*-
*
- * $Id: mp-arith.c,v 1.
3 1999/12/11 10:57:43
mdw Exp $
+ * $Id: mp-arith.c,v 1.
5 1999/12/22 15:54:41
mdw Exp $
*
* Basic arithmetic on multiprecision integers
*
*
* Basic arithmetic on multiprecision integers
*
@@
-30,6
+30,12
@@
/*----- Revision history --------------------------------------------------*
*
* $Log: mp-arith.c,v $
/*----- Revision history --------------------------------------------------*
*
* $Log: mp-arith.c,v $
+ * Revision 1.5 1999/12/22 15:54:41 mdw
+ * Adjust Karatsuba parameters. Calculate destination size better.
+ *
+ * Revision 1.4 1999/12/13 15:35:16 mdw
+ * Slightly different rules on memory allocation.
+ *
* Revision 1.3 1999/12/11 10:57:43 mdw
* Karatsuba squaring algorithm.
*
* Revision 1.3 1999/12/11 10:57:43 mdw
* Karatsuba squaring algorithm.
*
@@
-208,13
+214,14
@@
mp *mp_mul(mp *d, mp *a, mp *b)
a = MP_COPY(a);
b = MP_COPY(b);
a = MP_COPY(a);
b = MP_COPY(b);
- MP_MODIFY(d, MP_LEN(a) + MP_LEN(b));
- if (MP_LEN(a) <= KARATSUBA_CUTOFF || MP_LEN(b) <= KARATSUBA_CUTOFF)
+ if (MP_LEN(a) <= KARATSUBA_CUTOFF || MP_LEN(b) <= KARATSUBA_CUTOFF) {
+ MP_MODIFY(d, MP_LEN(a) + MP_LEN(b));
mpx_umul(d->v, d->vl, a->v, a->vl, b->v, b->vl);
mpx_umul(d->v, d->vl, a->v, a->vl, b->v, b->vl);
- else {
- size_t m =
MAX(MP_LEN(a), MP_LEN(b)) * 2 + KARATSUBA_SLOP
;
+
}
else {
+ size_t m =
2 * MAX(MP_LEN(a), MP_LEN(b)) + 2
;
mpw *s;
mpw *s;
- m += 32;
+ MP_MODIFY(d, m);
+ m += KARATSUBA_SLOP;
s = MP_ALLOC(m);
mpx_kmul(d->v, d->vl, a->v, a->vl, b->v, b->vl, s, s + m);
MP_FREE(s);
s = MP_ALLOC(m);
mpx_kmul(d->v, d->vl, a->v, a->vl, b->v, b->vl, s, s + m);
MP_FREE(s);
@@
-240,10
+247,10
@@
mp *mp_sqr(mp *d, mp *a)
size_t m = MP_LEN(a);
a = MP_COPY(a);
size_t m = MP_LEN(a);
a = MP_COPY(a);
- MP_MODIFY(d, 2 * m);
+ MP_MODIFY(d, 2 * m
+ 2
);
if (m > KARATSUBA_CUTOFF) {
mpw *s;
if (m > KARATSUBA_CUTOFF) {
mpw *s;
- m = 2 * (m + 1) +
32
;
+ m = 2 * (m + 1) +
KARATSUBA_SLOP
;
s = MP_ALLOC(m);
mpx_ksqr(d->v, d->vl, a->v, a->vl, s, s + m);
MP_FREE(s);
s = MP_ALLOC(m);
mpx_ksqr(d->v, d->vl, a->v, a->vl, s, s + m);
MP_FREE(s);