| /* Copyright lowRISC contributors. */ |
| /* Licensed under the Apache License, Version 2.0, see LICENSE for details. */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| /** |
| * Standalone test for P-256 curve point test |
| * |
| * Runs the P-256 curve point test to check whether a point (given in affine |
| * space) is a valid P-256 curve point. |
| * See comment at the end of the file for expected values of result. |
| */ |
| |
| .section .text.start |
| |
| p256_oncurve_test: |
| |
| /* set dmem pointers to result */ |
| la x2, res_r |
| la x3, dptr_r |
| sw x2, 0(x3) |
| la x2, res_l |
| la x3, dptr_s |
| sw x2, 0(x3) |
| |
| /* set dmem pointer to point to curve point */ |
| la x2, point_x |
| la x3, dptr_x |
| sw x2, 0(x3) |
| la x2, point_y |
| la x3, dptr_y |
| sw x2, 0(x3) |
| |
| /* call curve point test routine in P-256 lib */ |
| jal x1, p256_isoncurve |
| |
| /* load result to WDRs for comparison with reference */ |
| li x2, 0 |
| la x3, res_r |
| bn.lid x2++, 0(x3) |
| la x3, res_l |
| bn.lid x2, 0(x3) |
| |
| ecall |
| |
| |
| .data |
| |
| /* buffer for right side result of Weierstrass equation */ |
| res_r: |
| .zero 32 |
| |
| /* buffer for left side result of Weierstrass equation */ |
| res_l: |
| .zero 32 |
| |
| /* point affine x-coordinate */ |
| point_x: |
| .word 0xbfa8c334 |
| .word 0x9773b7b3 |
| .word 0xf36b0689 |
| .word 0x6ec0c0b2 |
| .word 0xdb6c8bf3 |
| .word 0x1628ce58 |
| .word 0xfacdc546 |
| .word 0xb5511a6a |
| |
| /* point affine y-coordinate */ |
| point_y: |
| .word 0x9e008c2e |
| .word 0xa8707058 |
| .word 0xab9c6924 |
| .word 0x7f7a11d0 |
| .word 0xb53a17fa |
| .word 0x43dd09ea |
| .word 0x1f31c143 |
| .word 0x42a1c697 |
| |
| /* Expected values wide register file (w0=R, w1=S): |
| w0 = 0xb103b614b389c6b8e1a08330a6ce0b9c4b3726ec0bf61f6bdd66af03a4af5660 |
| w1 = 0xb103b614b389c6b8e1a08330a6ce0b9c4b3726ec0bf61f6bdd66af03a4af5660 |
| */ |
