select add libtommath

lib/hcrypto/libtommath/bn_mp_find_prime.c

@@ -0,0 +1,26 @@
+/* TomsFastMath, a fast ISO C bignum library.
+ * 
+ * This project is public domain and free for all purposes.
+ * 
+ * Love Hornquist Astrand <lha@h5l.org>
+ */
+#include <tommath.h>
+
+int mp_find_prime(mp_int *a)
+{
+  int res;
+
+  if (mp_iseven(a))
+    mp_add_d(a, 1, a);
+
+  do {
+
+    if ((res = mp_isprime(a)) == MP_NO) {
+      mp_add_d(a, 2, a);
+      continue;
+    }
+
+  } while (res != MP_YES);
+
+  return res;
+}