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Diffstat (limited to 'fpga_modular.h')
| -rw-r--r-- | fpga_modular.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/fpga_modular.h b/fpga_modular.h new file mode 100644 index 0000000..871c8d3 --- /dev/null +++ b/fpga_modular.h @@ -0,0 +1,87 @@ +//------------------------------------------------------------------------------ +// +// fpga_modular.h +// --------------------------- +// Modular arithmetic routines +// +// Authors: Pavel Shatov +// +// Copyright (c) 2015-2016, 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. +// +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Globals +//------------------------------------------------------------------------------ +extern FPGA_BUFFER ecdsa_q; +extern FPGA_BUFFER ecdsa_zero; +extern FPGA_BUFFER ecdsa_one; +extern FPGA_BUFFER ecdsa_delta; + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +void fpga_modular_init (); + +void fpga_modular_add (FPGA_BUFFER *a, FPGA_BUFFER *b, FPGA_BUFFER *s); +void fpga_modular_sub (FPGA_BUFFER *a, FPGA_BUFFER *b, FPGA_BUFFER *d); +void fpga_modular_mul (FPGA_BUFFER *a, FPGA_BUFFER *b, FPGA_BUFFER *p); +void fpga_modular_inv (FPGA_BUFFER *a, FPGA_BUFFER *a1); + +void fpga_modular_mul_helper_multiply (FPGA_BUFFER *a, FPGA_BUFFER *b, FPGA_WORD_EXTENDED *si); +void fpga_modular_mul_helper_accumulate (FPGA_WORD_EXTENDED *si, FPGA_WORD *c); +void fpga_modular_mul_helper_reduce_p256 (FPGA_WORD *c, FPGA_BUFFER *p); +void fpga_modular_mul_helper_reduce_p384 (FPGA_WORD *c, FPGA_BUFFER *p); + +void fpga_modular_inv_helper_shl (FPGA_WORD *x, FPGA_WORD *y); +void fpga_modular_inv_helper_shr (FPGA_WORD *x, FPGA_WORD *y); +void fpga_modular_inv_helper_add (FPGA_WORD *x, FPGA_WORD *y, FPGA_WORD *s); +void fpga_modular_inv_helper_sub (FPGA_WORD *x, FPGA_WORD *y, FPGA_WORD *d); +void fpga_modular_inv_helper_cpy (FPGA_WORD *dst, FPGA_WORD *src); +void fpga_modular_inv_helper_cmp (FPGA_WORD *a, FPGA_WORD *b, int *c); + + +//------------------------------------------------------------------------------ +// Reduction Routine Selection +//------------------------------------------------------------------------------ + +#if USE_CURVE == 1 +#define fpga_modular_mul_helper_reduce fpga_modular_mul_helper_reduce_p256 +#elif USE_CURVE == 2 +#define fpga_modular_mul_helper_reduce fpga_modular_mul_helper_reduce_p384 +#else +#error USE_CURVE must be either 1 or 2! +#endif + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ |