Import Tcl 8.6.10

libtommath/bn_mp_sqrmod.c

@@ -0,0 +1,25 @@
+#include "tommath_private.h"
+#ifdef BN_MP_SQRMOD_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* c = a * a (mod b) */
+mp_err mp_sqrmod(const mp_int *a, const mp_int *b, mp_int *c)
+{
+   mp_err  err;
+   mp_int  t;
+
+   if ((err = mp_init(&t)) != MP_OKAY) {
+      return err;
+   }
+
+   if ((err = mp_sqr(a, &t)) != MP_OKAY) {
+      goto LBL_ERR;
+   }
+   err = mp_mod(&t, b, c);
+
+LBL_ERR:
+   mp_clear(&t);
+   return err;
+}
+#endif