s4:heimdal: import lorikeet-heimdal-202201172009 (commit 5a0b45cd723628b3690ea848548b...

[samba.git] / source4 / heimdal / lib / hcrypto / libtommath / bn_mp_shrink.c

diff --git a/source4/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c
index 4b8c5ef11adb6a94117e06f7ee2333012ff576ff..cf27ed9ec385b965b4a051f446a64eff896c54f3 100644 (file)
--- a/source4/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c
+++ b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c
@@ -1,35 +1,22 @@
-#include <tommath.h>
+#include "tommath_private.h"
 #ifdef BN_MP_SHRINK_C
-/* LibTomMath, multiple-precision integer library -- Tom St Denis
- *
- * LibTomMath is a library that provides multiple-precision
- * integer arithmetic as well as number theoretic functionality.
- *
- * The library was designed directly after the MPI library by
- * Michael Fromberger but has been written from scratch with
- * additional optimizations in place.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- *
- * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 /* shrink a bignum */
-int mp_shrink (mp_int * a)
+mp_err mp_shrink(mp_int *a)
 {
-  mp_digit *tmp;
-  if (a->alloc != a->used && a->used > 0) {
-    if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * a->used)) == NULL) {
-      return MP_MEM;
-    }
-    a->dp    = tmp;
-    a->alloc = a->used;
-  }
-  return MP_OKAY;
+   mp_digit *tmp;
+   int alloc = MP_MAX(MP_MIN_PREC, a->used);
+   if (a->alloc != alloc) {
+      if ((tmp = (mp_digit *) MP_REALLOC(a->dp,
+                                         (size_t)a->alloc * sizeof(mp_digit),
+                                         (size_t)alloc * sizeof(mp_digit))) == NULL) {
+         return MP_MEM;
+      }
+      a->dp    = tmp;
+      a->alloc = alloc;
+   }
+   return MP_OKAY;
 }
 #endif
-
-/* $Source: /cvs/libtom/libtommath/bn_mp_shrink.c,v $ */
-/* $Revision: 1.4 $ */
-/* $Date: 2006/12/28 01:25:13 $ */