From 71fba5c6662d6bbe74366c03b531a5f86b25bbbb Mon Sep 17 00:00:00 2001 From: "Pavel V. Shatov (Meister)" Date: Mon, 26 Feb 2018 13:05:17 +0300 Subject: Initial commit of C reference model for ECDH cores. --- fpga_util.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 fpga_util.cpp (limited to 'fpga_util.cpp') diff --git a/fpga_util.cpp b/fpga_util.cpp new file mode 100644 index 0000000..d5e4708 --- /dev/null +++ b/fpga_util.cpp @@ -0,0 +1,86 @@ +//------------------------------------------------------------------------------ +// +// fpga_util.cpp +// --------------------- +// Utility FPGA routines +// +// Authors: Pavel Shatov +// +// Copyright (c) 2015-2016, 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 +#include "ecdh_fpga_model.h" +#include "fpga_lowlevel.h" +#include "fpga_util.h" + + +//------------------------------------------------------------------------------ +bool fpga_buffer_is_zero(FPGA_BUFFER *x) +//------------------------------------------------------------------------------ +// +// Returns true when large multi-word integer x is zero. +// +//------------------------------------------------------------------------------ +{ + int w; // word counter + + // try to find non-zero words + for (w=0; wwords[w]) return false; + + // no non-zero words found + return true; +} + + +//------------------------------------------------------------------------------ +void fpga_buffer_copy(FPGA_BUFFER *src, FPGA_BUFFER *dst) +//------------------------------------------------------------------------------ +// +// Copies large multi-word integer from src into dst. +// +//------------------------------------------------------------------------------ +{ + int w; // word counter + + // copy all the words from src into dst + for (w=0; wwords[w] = src->words[w]; +} + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ -- cgit v1.2.3