1 files changed, 91 insertions, 0 deletions
diff --git a/ecdsa_fpga_multiword.h b/ecdsa_fpga_multiword.h
new file mode 100644
index 0000000..9190fd5
--- /dev/null
+++ b/ecdsa_fpga_multiword.h
@@ -0,0 +1,91 @@
+//------------------------------------------------------------------------------
+//
+// fpga_ecdsa_multiword.h
+// -----------------------------------------
+// Models of multi-precision FPGA primitives
+//
+// 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.
+//
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// Model Parameters
+//------------------------------------------------------------------------------
+#if USE_CURVE == 1
+
+#define FPGA_OPERAND_WIDTH  (256)   // largest supported operand width in bits
+
+#elif USE_CURVE == 2
+
+#define FPGA_OPERAND_WIDTH  (384)   // largest supported operand width in bits
+
+#else
+
+BAD_CURVE
+
+#endif
+
+
+//------------------------------------------------------------------------------
+// FPGA Pipeline Settings
+//------------------------------------------------------------------------------
+#define FPGA_OPERAND_NUM_WORDS  (FPGA_OPERAND_WIDTH / FPGA_WORD_WIDTH)
+
+
+//------------------------------------------------------------------------------
+// Operand Data Type
+//------------------------------------------------------------------------------
+typedef struct FPGA_BUFFER
+{
+    FPGA_WORD words[FPGA_OPERAND_NUM_WORDS];
+}
+FPGA_BUFFER;
+
+
+//------------------------------------------------------------------------------
+// Globals
+//------------------------------------------------------------------------------
+extern FPGA_BUFFER ECDSA_ZERO;
+extern FPGA_BUFFER ECDSA_ONE;
+
+
+//------------------------------------------------------------------------------
+// Prototpes
+//------------------------------------------------------------------------------
+void fpga_multiword_init    ();
+void fpga_multiword_copy    (const FPGA_BUFFER *src, FPGA_BUFFER *dst);
+bool fpga_multiword_is_zero (const FPGA_BUFFER *x);
+
+
+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------