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authorgahr <gahr@gahr.ch>2016-03-11 17:13:38 (GMT)
committergahr <gahr@gahr.ch>2016-03-11 17:13:38 (GMT)
commit48a3d3e4dca22efb2981fd8eb9b505b19438a704 (patch)
treef0acc29307113ad908a79330d8b8c924c8ad79ae /libtommath/bn_mp_dr_reduce.c
parent5137357e74c887368ad68c3cb09998b154e68d4f (diff)
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[e6f27aa56f] Initial import of libtommath-1.0
This commit brings in libtommath-1.0, as of tag v1.0 of the upstream repository at https://github.com/libtom/libtommath. Only the top-level directory has been imported: the demo, etc, logs, mtest, pics, pre_gen, and tombc directories have been removed from our repo. The stubs tables have been regenerated to accomodate for the new function: mp_expt_d_ex(mp_int *a, mp_digit b, mp_int *c, int fast); See https://github.com/libtom/libtommath/commit/e9b1837 for details. Only the unix build system has been modified for now. Windows and Mac OSX will come later.
Diffstat (limited to 'libtommath/bn_mp_dr_reduce.c')
-rw-r--r--libtommath/bn_mp_dr_reduce.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/libtommath/bn_mp_dr_reduce.c b/libtommath/bn_mp_dr_reduce.c
index 8337591..2273c79 100644
--- a/libtommath/bn_mp_dr_reduce.c
+++ b/libtommath/bn_mp_dr_reduce.c
@@ -1,4 +1,4 @@
-#include <tommath.h>
+#include <tommath_private.h>
#ifdef BN_MP_DR_REDUCE_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
@@ -12,7 +12,7 @@
* The library is free for all purposes without any express
* guarantee it works.
*
- * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
*/
/* reduce "x" in place modulo "n" using the Diminished Radix algorithm.
@@ -40,7 +40,7 @@ mp_dr_reduce (mp_int * x, mp_int * n, mp_digit k)
m = n->used;
/* ensure that "x" has at least 2m digits */
- if (x->alloc < m + m) {
+ if (x->alloc < (m + m)) {
if ((err = mp_grow (x, m + m)) != MP_OKAY) {
return err;
}
@@ -62,7 +62,7 @@ top:
/* compute (x mod B**m) + k * [x/B**m] inline and inplace */
for (i = 0; i < m; i++) {
- r = ((mp_word)*tmpx2++) * ((mp_word)k) + *tmpx1 + mu;
+ r = (((mp_word)*tmpx2++) * (mp_word)k) + *tmpx1 + mu;
*tmpx1++ = (mp_digit)(r & MP_MASK);
mu = (mp_digit)(r >> ((mp_word)DIGIT_BIT));
}
@@ -82,9 +82,15 @@ top:
* Each successive "recursion" makes the input smaller and smaller.
*/
if (mp_cmp_mag (x, n) != MP_LT) {
- s_mp_sub(x, n, x);
+ if ((err = s_mp_sub(x, n, x)) != MP_OKAY) {
+ return err;
+ }
goto top;
}
return MP_OKAY;
}
#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */