HEIMDAL: move code from source4/heimdal* to third_party/heimdal*

This makes it clearer that we always want to do heimdal changes
via the lorikeet-heimdal repository.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>

Autobuild-User(master): Joseph Sutton <jsutton@samba.org>
Autobuild-Date(master): Wed Jan 19 21:41:59 UTC 2022 on sn-devel-184

1 files changed, 25 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mulmod.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mulmod.c
new file mode 100644
index 00000000000..160d1626a14
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_mulmod.c
@@ -0,0 +1,25 @@
+#include "tommath_private.h"
+#ifdef BN_MP_MULMOD_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* d = a * b (mod c) */
+mp_err mp_mulmod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d)
+{
+   mp_err err;
+   mp_int t;
+
+   if ((err = mp_init_size(&t, c->used)) != MP_OKAY) {
+      return err;
+   }
+
+   if ((err = mp_mul(a, b, &t)) != MP_OKAY) {
+      goto LBL_ERR;
+   }
+   err = mp_mod(&t, c, d);
+
+LBL_ERR:
+   mp_clear(&t);
+   return err;
+}
+#endif