propagate from branch 'net.randombit.botan' (head 9524e848cdacd0b56ded9bd6b51fd34b6a7d3fc4)

            to branch 'net.randombit.botan.ecdsa' (head 8231f4285dce2d5ec754f7afa72e0d34807de061)

1 files changed, 22 insertions, 0 deletions

diff --git a/src/core/def_powm.cpp b/src/core/def_powm.cpp
new file mode 100644
index 000000000..a28438f5b
--- /dev/null
+++ b/src/core/def_powm.cpp
@@ -0,0 +1,22 @@
+/*************************************************
+* Modular Exponentiation Source File             *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/eng_def.h>
+#include <botan/def_powm.h>
+
+namespace Botan {
+
+/*************************************************
+* Choose a modular exponentation algorithm       *
+*************************************************/
+Modular_Exponentiator*
+Default_Engine::mod_exp(const BigInt& n, Power_Mod::Usage_Hints hints) const
+   {
+   if(n.is_odd())
+      return new Montgomery_Exponentiator(n, hints);
+   return new Fixed_Window_Exponentiator(n, hints);
+   }
+
+}