diff options
Diffstat (limited to 'x25519')
| -rw-r--r-- | x25519/x25519_fpga_model.cpp | 174 | ||||
| -rw-r--r-- | x25519/x25519_fpga_model.h | 50 |
2 files changed, 224 insertions, 0 deletions
diff --git a/x25519/x25519_fpga_model.cpp b/x25519/x25519_fpga_model.cpp new file mode 100644 index 0000000..67e3c3f --- /dev/null +++ b/x25519/x25519_fpga_model.cpp @@ -0,0 +1,174 @@ +//------------------------------------------------------------------------------ +// +// x25519_fpga_model.cpp +// --------------------- +// X25519 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. +// +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Mode Switch +//------------------------------------------------------------------------------ +#define USE_MICROCODE + + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ +#include "x25519_fpga_model.h" + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +static void fpga_model_x25519_init (); +static bool test_x25519_point_multiplier (const FPGA_BUFFER *px, const FPGA_BUFFER *k, const FPGA_BUFFER *qx); + + +//------------------------------------------------------------------------------ +// Locals +//------------------------------------------------------------------------------ +static FPGA_BUFFER x25519_da, x25519_db; +static FPGA_BUFFER x25519_qa_x, x25519_qb_x; +static FPGA_BUFFER x25519_qab_x; + + +//------------------------------------------------------------------------------ +int main() +//------------------------------------------------------------------------------ +{ + bool ok_a, ok_b; // flags + + + // + // initialize buffers + // + fpga_multiword_init(); + fpga_modular_init(); + fpga_curve_x25519_init(); + fpga_model_x25519_init(); + + + // + // test point multiplier: QA = dA * G + // QB = dB * G + // + printf("Trying to derive public keys from private keys...\n\n"); + ok_a = test_x25519_point_multiplier(&X25519_G_X, &x25519_da, &x25519_qa_x); + ok_b = test_x25519_point_multiplier(&X25519_G_X, &x25519_db, &x25519_qb_x); + if (!ok_a || !ok_b) return EXIT_FAILURE; + + + // + // test point multiplier: QAB = dA * QB + // QAB = dB * QA + // + printf("Trying to derive shared secret key...\n\n"); + ok_a = test_x25519_point_multiplier(&x25519_qb_x, &x25519_da, &x25519_qab_x); + ok_b = test_x25519_point_multiplier(&x25519_qa_x, &x25519_db, &x25519_qab_x); + if (!ok_a || !ok_b) return EXIT_FAILURE; + + + // + // everything went just fine + // + return EXIT_SUCCESS; +} + + +//------------------------------------------------------------------------------ +static void fpga_model_x25519_init() +//------------------------------------------------------------------------------ +{ + int w_src, w_dst; // word counters + + FPGA_WORD tmp_da[FPGA_OPERAND_NUM_WORDS] = X25519_DA; + FPGA_WORD tmp_db[FPGA_OPERAND_NUM_WORDS] = X25519_DB; + + FPGA_WORD tmp_qa_x[FPGA_OPERAND_NUM_WORDS] = X25519_QA_X; + FPGA_WORD tmp_qb_x[FPGA_OPERAND_NUM_WORDS] = X25519_QB_X; + + FPGA_WORD tmp_qab_x[FPGA_OPERAND_NUM_WORDS] = X25519_QAB_X; + + /* fill buffers for large multi-word integers */ + for ( w_src = 0, w_dst = FPGA_OPERAND_NUM_WORDS - 1; + w_src < FPGA_OPERAND_NUM_WORDS; + w_src++, w_dst--) + { + x25519_da.words[w_dst] = tmp_da[w_src]; + x25519_db.words[w_dst] = tmp_db[w_src]; + + x25519_qa_x.words[w_dst] = tmp_qa_x[w_src]; + x25519_qb_x.words[w_dst] = tmp_qb_x[w_src]; + + x25519_qab_x.words[w_dst] = tmp_qab_x[w_src]; + } +} + + +//------------------------------------------------------------------------------ +static bool test_x25519_point_multiplier(const FPGA_BUFFER *px, const FPGA_BUFFER *k, const FPGA_BUFFER *qx) +//------------------------------------------------------------------------------ +// +// (px, ...) - multiplicand +// k - multiplier +// +// (qx, ...) - expected coordinates of product +// +// Returns true when point (rx, ...) = k * P matches the point (qx, ...). +// +//------------------------------------------------------------------------------ +{ + bool ok; // flag + FPGA_BUFFER rx; // result + + /* run the model */ + fpga_curve_x25519_scalar_multiply(px, k, &rx); + + /* handle result */ + ok = compare_fpga_buffers(qx, &rx); + if (!ok) + { printf("\n ERROR\n\n"); + return false; + } + else printf("\n OK\n\n"); + + // everything went just fine + return true; +} + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ diff --git a/x25519/x25519_fpga_model.h b/x25519/x25519_fpga_model.h new file mode 100644 index 0000000..53ee8c2 --- /dev/null +++ b/x25519/x25519_fpga_model.h @@ -0,0 +1,50 @@ +//------------------------------------------------------------------------------ +// +// x25519_fpga_model.h +// ------------------- +// X25519 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" +#include "x25519_fpga_curve.h" +#include "x25519_test_vector.h" + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ |