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//------------------------------------------------------------------------------
//
// 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
//------------------------------------------------------------------------------
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