1 files changed, 12 insertions, 0 deletions
diff --git a/src/libbiguint/bu_invmod.c b/src/libbiguint/bu_invmod.c
new file mode 100644
index 0000000..ff209e7
--- /dev/null
+++ b/src/libbiguint/bu_invmod.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/biguint.h>
+
+/* x^-1 mod m. */
+
+int bu_invmod (uint32 *x, unsigned int xn, uint32 const *m, unsigned int mn)
+{
+  uint32 const one = 1 ;
+  return bu_divmod(x, xn, &one, 1, x, xn, m, mn) ;
+}