1 files changed, 87 insertions, 0 deletions
diff --git a/botan/src/pubkey/if_algo/if_core.cpp b/botan/src/pubkey/if_algo/if_core.cpp
new file mode 100644
index 0000000..8cc6a81
--- /dev/null
+++ b/botan/src/pubkey/if_algo/if_core.cpp
@@ -0,0 +1,87 @@
+/*
+* IF Algorithm Core
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/if_core.h>
+#include <botan/numthry.h>
+#include <botan/pk_engine.h>
+#include <botan/parsing.h>
+#include <algorithm>
+
+namespace Botan {
+
+namespace {
+
+const u32bit BLINDING_BITS = BOTAN_PRIVATE_KEY_OP_BLINDING_BITS;
+
+}
+
+/*
+* IF_Core Constructor
+*/
+IF_Core::IF_Core(const BigInt& e, const BigInt& n)
+   {
+   op = Engine_Core::if_op(e, n, 0, 0, 0, 0, 0, 0);
+   }
+
+
+/*
+* IF_Core Constructor
+*/
+IF_Core::IF_Core(RandomNumberGenerator& rng,
+                 const BigInt& e, const BigInt& n, const BigInt& d,
+                 const BigInt& p, const BigInt& q,
+                 const BigInt& d1, const BigInt& d2, const BigInt& c)
+   {
+   op = Engine_Core::if_op(e, n, d, p, q, d1, d2, c);
+
+   if(BLINDING_BITS)
+      {
+      BigInt k(rng, std::min(n.bits()-1, BLINDING_BITS));
+      blinder = Blinder(power_mod(k, e, n), inverse_mod(k, n), n);
+      }
+   }
+
+/*
+* IF_Core Copy Constructor
+*/
+IF_Core::IF_Core(const IF_Core& core)
+   {
+   op = 0;
+   if(core.op)
+      op = core.op->clone();
+   blinder = core.blinder;
+   }
+
+/*
+* IF_Core Assignment Operator
+*/
+IF_Core& IF_Core::operator=(const IF_Core& core)
+   {
+   delete op;
+   if(core.op)
+      op = core.op->clone();
+   blinder = core.blinder;
+   return (*this);
+   }
+
+/*
+* IF Public Operation
+*/
+BigInt IF_Core::public_op(const BigInt& i) const
+   {
+   return op->public_op(i);
+   }
+
+/*
+* IF Private Operation
+*/
+BigInt IF_Core::private_op(const BigInt& i) const
+   {
+   return blinder.unblind(op->private_op(blinder.blind(i)));
+   }
+
+}