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Diffstat (limited to 'x25519/x25519_fpga_curve.h')
| -rw-r--r-- | x25519/x25519_fpga_curve.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/x25519/x25519_fpga_curve.h b/x25519/x25519_fpga_curve.h new file mode 100644 index 0000000..9f8bff9 --- /dev/null +++ b/x25519/x25519_fpga_curve.h @@ -0,0 +1,90 @@ +//------------------------------------------------------------------------------ +// +// x25519_fpga_curve.h +// ----------------------------------------------- +// Elliptic curve arithmetic procedures for X25519 +// +// Authors: Pavel Shatov +// +// Copyright (c) 2015-2018 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. +// +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Curve25519 Parameters +//------------------------------------------------------------------------------ + +/* x-coordinate of the base point */ +#define X25519_G_X_INIT {0x00000000, 0x00000000, 0x00000000, 0x00000000, \ + 0x00000000, 0x00000000, 0x00000000, 0x00000009} + +/* coefficient (A + 2) / 4 */ +#define X25519_A24_INIT {0x00000000, 0x00000000, 0x00000000, 0x00000000, \ + 0x00000000, 0x00000000, 0x00000000, 0x0001DB42} + +//------------------------------------------------------------------------------ +// Globals +//------------------------------------------------------------------------------ +extern FPGA_BUFFER X25519_G_X; // the base point +extern FPGA_BUFFER X25519_A24; // coefficient (A + 2) / 4 + + +//------------------------------------------------------------------------------ +// Implementation switch +//------------------------------------------------------------------------------ +#ifdef USE_MICROCODE +#define fpga_curve_x25519_scalar_multiply fpga_curve_x25519_scalar_multiply_microcode +#else +#define fpga_curve_x25519_scalar_multiply fpga_curve_x25519_scalar_multiply_abstract +#endif + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +void fpga_curve_x25519_init (); + +void fpga_curve_x25519_scalar_multiply_abstract (const FPGA_BUFFER *P_X, const FPGA_BUFFER *K, FPGA_BUFFER *Q_X); +void fpga_curve_x25519_scalar_multiply_microcode (const FPGA_BUFFER *P_X, const FPGA_BUFFER *K, FPGA_BUFFER *Q_X); + +void fpga_curve_x25519_ladder_step (const FPGA_BUFFER *P_X, + const FPGA_BUFFER *R0_X_in, const FPGA_BUFFER *R0_Z_in, + const FPGA_BUFFER *R1_X_in, const FPGA_BUFFER *R1_Z_in, + FPGA_BUFFER *R0_X_out, FPGA_BUFFER *R0_Z_out, + FPGA_BUFFER *R1_X_out, FPGA_BUFFER *R1_Z_out); + +void fpga_curve_x25519_to_affine (const FPGA_BUFFER *P_X, + const FPGA_BUFFER *P_Z, + FPGA_BUFFER *Q_X); + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ |