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esp_wifi: Optimize sae crypto operations for esp32

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This commit is contained in:
Kapil Gupta 2023-06-16 12:43:38 +05:30
parent 73c4120d42
commit b0e4888063
2 changed files with 13 additions and 26 deletions
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23
components/wpa_supplicant/src/crypto/crypto_mbedtls-bignum.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -162,27 +162,10 @@ int crypto_bignum_mulmod(const struct crypto_bignum *a,
const struct crypto_bignum *c,
struct crypto_bignum *d)
{
int res;
#if ALLOW_EVEN_MOD || !CONFIG_MBEDTLS_HARDWARE_MPI // Must enable ALLOW_EVEN_MOD if c is even
mbedtls_mpi temp;
mbedtls_mpi_init(&temp);
res = mbedtls_mpi_mul_mpi(&temp, (const mbedtls_mpi *) a, (const mbedtls_mpi *) b);
if (res) {
return -1;
}
res = mbedtls_mpi_mod_mpi((mbedtls_mpi *) d, &temp, (mbedtls_mpi *) c);
mbedtls_mpi_free(&temp);
#else
// Works with odd modulus only, but it is faster with HW acceleration
res = esp_mpi_mul_mpi_mod((mbedtls_mpi *) d, (mbedtls_mpi *) a, (mbedtls_mpi *) b, (mbedtls_mpi *) c);
#endif
return res ? -1 : 0;
return mbedtls_mpi_mul_mpi((mbedtls_mpi *)d, (const mbedtls_mpi *)a, (const mbedtls_mpi *)b) ||
mbedtls_mpi_mod_mpi((mbedtls_mpi *)d, (mbedtls_mpi *)d, (const mbedtls_mpi *)c) ? -1 : 0;
}
int crypto_bignum_sqrmod(const struct crypto_bignum *a,
const struct crypto_bignum *b,
struct crypto_bignum *c)

16
components/wpa_supplicant/src/crypto/crypto_mbedtls-ec.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -376,14 +376,18 @@ struct crypto_bignum *crypto_ec_point_compute_y_sqr(struct crypto_ec *e,
mbedtls_mpi_init(&num);
mbedtls_mpi_init(y_sqr);
/* y^2 = x^3 + ax + b mod P*/
/* mbedtls does not have mod-add or mod-mul apis.
*
*/
/* y^2 = x^3 + ax + b mod P */
/* X*X*X is faster on esp32 whereas X^3 is faster on other chips */
#if CONFIG_IDF_TARGET_ESP32
/* Calculate x*x*x mod P*/
MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&temp, (const mbedtls_mpi *) x, (const mbedtls_mpi *) x));
MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&temp, &temp, (const mbedtls_mpi *) x));
MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&temp, &temp, &e->group.P));
#else
/* Calculate x^3 mod P*/
MBEDTLS_MPI_CHK(mbedtls_mpi_lset(&num, 3));
MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&temp, (const mbedtls_mpi *) x, &num, &e->group.P, NULL));
#endif
/* Calculate ax mod P*/
MBEDTLS_MPI_CHK(mbedtls_mpi_lset(&num, -3));