1 files changed, 101 insertions, 0 deletions
diff --git a/curve25519/curve25519_fpga_model.cpp b/curve25519/curve25519_fpga_model.cpp
new file mode 100644
index 0000000..13d276e
--- /dev/null
+++ b/curve25519/curve25519_fpga_model.cpp
@@ -0,0 +1,101 @@
+//------------------------------------------------------------------------------
+//
+// curve25519_fpga_model.cpp
+// -------------------------
+// Curve25519 FPGA Model 
+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2018, NORDUnet A/S
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may be
+//   used to endorse or promote products derived from this software without
+//   specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include "curve25519_fpga_model.h"
+
+
+//------------------------------------------------------------------------------
+bool compare_fpga_buffers(const FPGA_BUFFER *ax, const FPGA_BUFFER *bx)
+//------------------------------------------------------------------------------
+//
+// Compare affine coordinates of two points and return true when they match.
+//
+//------------------------------------------------------------------------------
+{
+	int w;	// word counter
+
+		// print all the values
+	print_fpga_buffer("  Expected:   X = ", ax);
+	print_fpga_buffer("  Calculated: X = ", bx);
+
+		// compare values
+	for (w=0; w<FPGA_OPERAND_NUM_WORDS; w++)
+	{
+			// compare x
+		if (ax->words[w] != bx->words[w]) return false;
+	}
+
+		// values are the same
+	return true;
+}
+
+
+//------------------------------------------------------------------------------
+void print_fpga_buffer(const char *s, const FPGA_BUFFER *buf)
+//------------------------------------------------------------------------------
+//
+// Pretty print large multi-word integer.
+//
+//------------------------------------------------------------------------------
+{
+	int w;	// word counter
+
+		// print header
+	printf("%s", s);
+
+		// print all bytes
+	for (w=FPGA_OPERAND_NUM_WORDS; w>0; w--)
+	{	
+		printf("%08x", buf->words[w-1]);
+
+			// insert space after every group of 4 bytes
+		if (w > 1) printf(" ");
+	}
+
+		// print footer
+	printf("\n");
+}
+
+
+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------