1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mod.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mod.c
new file mode 100644
index 0000000..8fbfe08
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mod.c
@@ -0,0 +1,31 @@
+#include "tommath_private.h"
+#ifdef BN_MP_MOD_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* c = a mod b, 0 <= c < b if b > 0, b < c <= 0 if b < 0 */
+mp_err mp_mod(const mp_int *a, const mp_int *b, mp_int *c)
+{
+   mp_int  t;
+   mp_err  err;
+
+   if ((err = mp_init_size(&t, b->used)) != MP_OKAY) {
+      return err;
+   }
+
+   if ((err = mp_div(a, b, NULL, &t)) != MP_OKAY) {
+      goto LBL_ERR;
+   }
+
+   if (MP_IS_ZERO(&t) || (t.sign == b->sign)) {
+      err = MP_OKAY;
+      mp_exch(&t, c);
+   } else {
+      err = mp_add(b, &t, c);
+   }
+
+LBL_ERR:
+   mp_clear(&t);
+   return err;
+}
+#endif