| /* Copyright lowRISC contributors. */ |
| /* Licensed under the Apache License, Version 2.0, see LICENSE for details. */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| /** |
| * Standalone elliptic curve P-256 ECDSA signature verification test |
| * |
| * Uses OTBN ECC P-256 lib to perform an ECDSA signature verification. |
| * Coordinates of the public key, the message digest and R and S of the |
| * signature are provided in the .data section below. |
| * |
| * Signature verification was successful, if the return values in the rnd and R |
| * location are identical. The return values are copied to wide registers. See |
| * comment at the end of the file for expected values for this example. |
| */ |
| |
| .text |
| |
| ecdsa_verify_test: |
| jal x1, p256_init |
| jal x1, p256_verify |
| |
| /* pointer to rnd */ |
| lw x21, 4(x0) |
| /* pointer to R */ |
| lw x22, 12(x0) |
| |
| /* copy result to wide reg file */ |
| li x8, 0 |
| bn.lid x8, 0(x21) |
| li x9, 1 |
| bn.lid x9, 0(x22) |
| |
| ecall |
| |
| |
| .data |
| |
| /* pointer to k (dptr_k) */ |
| .word 0x00000020 |
| |
| /* pointer to rnd (dptr_rnd) */ |
| .word 0x00000040 |
| |
| /* pointer to msg (dptr_msg) */ |
| .word 0x00000060 |
| |
| /* pointer to R (dptr_r) */ |
| .word 0x00000080 |
| |
| /* pointer to S (dptr_s) */ |
| .word 0x000000a0 |
| |
| /* pointer to X (dptr_x) */ |
| .word 0x000000c0 |
| |
| /* pointer to Y (dptr_y) */ |
| .word 0x000000e0 |
| |
| /* pointer to D (dptr_d) */ |
| .word 0x00000100 |
| |
| /* message digest */ |
| .skip 64 |
| .word 0x4456fd21 |
| .word 0x400bdd7d |
| .word 0xb54d7452 |
| .word 0x17d015f1 |
| .word 0x90d4d90b |
| .word 0xb028ad8a |
| .word 0x6ce90fef |
| .word 0x06d71207 |
| |
| /* signature R */ |
| .word 0x80a9674a |
| .word 0x1147ea56 |
| .word 0x0c7d87dd |
| .word 0x99504edd |
| .word 0xbe064de2 |
| .word 0x6b35843c |
| .word 0x7dd27f33 |
| .word 0x815215ad |
| |
| /* signature S */ |
| .word 0xc93fd605 |
| .word 0xd0b1051e |
| .word 0xe90a6d17 |
| .word 0x4dad9404 |
| .word 0x99e589ad |
| .word 0x86e30cd9 |
| .word 0xc4440420 |
| .word 0xa3991e01 |
| |
| /* public key x-coordinate */ |
| .word 0xbfa8c334 |
| .word 0x9773b7b3 |
| .word 0xf36b0689 |
| .word 0x6ec0c0b2 |
| .word 0xdb6c8bf3 |
| .word 0x1628ce58 |
| .word 0xfacdc546 |
| .word 0xb5511a6a |
| |
| /* public key y-coordinate */ |
| .word 0x9e008c2e |
| .word 0xa8707058 |
| .word 0xab9c6924 |
| .word 0x7f7a11d0 |
| .word 0xb53a17fa |
| .word 0x43dd09ea |
| .word 0x1f31c143 |
| .word 0x42a1c697 |
| |
| /* Expected values wide register file (w0=rnd, w1=R): |
| w0 = 0x815215ad7dd27f336b35843cbe064de299504edd0c7d87dd1147ea5680a9674a |
| w1 = 0x815215ad7dd27f336b35843cbe064de299504edd0c7d87dd1147ea5680a9674a |
| */ |
