esp-idf/components/wpa_supplicant/test_apps/main/test_fast_pbkdf2.c

/*
 * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Unlicense OR CC0-1.0
 */
#include "string.h"
#include <inttypes.h>
#include "unity.h"
#include "utils/common.h"
#include "mbedtls/pkcs5.h"
#include "crypto/sha1.h"
#include "test_wpa_supplicant_common.h"

#define PMK_LEN 32

TEST_CASE("Test pbkdf2", "[crypto-pbkdf2]")
{
    set_leak_threshold(120);

    uint8_t PMK[PMK_LEN];
    uint8_t ssid_len;
    uint8_t passphrase_len;
    uint8_t ssid[MAX_SSID_LEN];
    uint8_t passphrase[MAX_PASSPHRASE_LEN];
    uint8_t expected_pmk1[PMK_LEN] = {
        0xe7, 0x90, 0xd0, 0x65, 0x67, 0xf0, 0xbf, 0xca, 0xca, 0x10, 0x88, 0x0b, 0x85, 0xb2, 0x33, 0xe5,
        0xe1, 0xd5, 0xe5, 0xb8, 0xd0, 0xfd, 0x94, 0x60, 0x56, 0x95, 0x5e, 0x41, 0x5a, 0x7f, 0xfa, 0xfa
    };

    uint8_t expected_pmk[PMK_LEN];

    /* Compare Fast PBKDF output with expected output*/
    pbkdf2_sha1("espressif", (uint8_t *)"espressif", strlen("espressif"), 4096, PMK, PMK_LEN);
    TEST_ASSERT(memcmp(PMK, expected_pmk1, PMK_LEN) == 0);

    /* Compare fast PBKDF output with mbedtls pbkdf2 function's output */
    pbkdf2_sha1("espressif2", (uint8_t *)"espressif2", strlen("espressif2"), 4096, PMK, PMK_LEN);
    mbedtls_pkcs5_pbkdf2_hmac_ext(MBEDTLS_MD_SHA1, (const unsigned char *) "espressif2",
                                  strlen("espressif2"), (const unsigned char *)"espressif2",
                                  strlen("espressif2"), 4096, PMK_LEN, expected_pmk);
    TEST_ASSERT(memcmp(PMK, expected_pmk, PMK_LEN) == 0);

    /* Calculate PMK using random ssid and passphrase and compare */
    os_memset(ssid, 0, MAX_SSID_LEN);
    os_memset(passphrase, 0, MAX_PASSPHRASE_LEN);
    ssid_len = os_random();
    ssid_len %= MAX_SSID_LEN;

    os_get_random(ssid, ssid_len);

    passphrase_len = os_random();
    passphrase_len %= MAX_PASSPHRASE_LEN;

    os_get_random(passphrase, passphrase_len);
    pbkdf2_sha1((char *)passphrase, ssid, ssid_len, 4096, PMK, PMK_LEN);
    mbedtls_pkcs5_pbkdf2_hmac_ext(MBEDTLS_MD_SHA1, (const unsigned char *) passphrase,
                                  strlen((char *)passphrase), (const unsigned char *)ssid,
                                  ssid_len, 4096, PMK_LEN, expected_pmk);

    /* Dump values if fails */
    if (memcmp(PMK, expected_pmk, PMK_LEN) != 0) {
        ESP_LOG_BUFFER_HEXDUMP("passphrase", passphrase, passphrase_len, ESP_LOG_INFO);
        ESP_LOG_BUFFER_HEXDUMP("ssid", ssid, ssid_len, ESP_LOG_INFO);
        ESP_LOG_BUFFER_HEXDUMP("PMK", PMK, PMK_LEN, ESP_LOG_INFO);
        ESP_LOG_BUFFER_HEXDUMP("expected_pmk", expected_pmk, PMK_LEN, ESP_LOG_INFO);
    }
    TEST_ASSERT(memcmp(PMK, expected_pmk, PMK_LEN) == 0);
}