1 files changed, 22 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c
new file mode 100644
index 0000000..cf27ed9
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_shrink.c
@@ -0,0 +1,22 @@
+#include "tommath_private.h"
+#ifdef BN_MP_SHRINK_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* shrink a bignum */
+mp_err mp_shrink(mp_int *a)
+{
+   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