| /* 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 sign test |
| * |
| * Uses OTBN ECC P-256 lib to perform an ECDSA signing operation. |
| * An example message digest, the private signing key and a random value k are |
| * provided in the .data section below. Note that this test does not yet use |
| * OTBN's entropy interface as a source for the random value in the ECDSA |
| * operation. |
| * |
| * Resulting R and S of the signature are copied to the wide registers. See |
| * comment at the end of the file for expected values. |
| */ |
| |
| .text |
| |
| ecdsa_sign_test: |
| jal x1, p256_init |
| jal x1, p256_sign |
| |
| /* pointer to R */ |
| lw x21, 12(x0) |
| /* pointer to S */ |
| lw x22, 16(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 |
| |
| /* example random scalar k */ |
| .word 0xfe6d1071 |
| .word 0x21d0a016 |
| .word 0xb0b2c781 |
| .word 0x9590ef5d |
| .word 0x3fdfa379 |
| .word 0x1b76ebe8 |
| .word 0x74210263 |
| .word 0x1420fc41 |
| |
| /* message digest */ |
| .skip 32 |
| .word 0x4456fd21 |
| .word 0x400bdd7d |
| .word 0xb54d7452 |
| .word 0x17d015f1 |
| .word 0x90d4d90b |
| .word 0xb028ad8a |
| .word 0x6ce90fef |
| .word 0x06d71207 |
| |
| /* private key d */ |
| .skip 128 |
| .word 0xc7df1a56 |
| .word 0xfbd94efe |
| .word 0xaa847f52 |
| .word 0x2d869bf4 |
| .word 0x543b963b |
| .word 0xe5f2cbee |
| .word 0x9144233d |
| .word 0xc0fbe256 |
| |
| /* Expected values wide register file (w0=R, w1=S): |
| w0 = 0x815215ad7dd27f336b35843cbe064de299504edd0c7d87dd1147ea5680a9674a |
| w1 = 0xa3991e01c444042086e30cd999e589ad4dad9404e90a6d17d0b1051ec93fd605 |
| */ |
