wolfssl-w32/IDE/Espressif/ESP-IDF/examples/wolfssl_client/main/client-tls.c

504 lines
15 KiB
C

/* client-tls.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include "client-tls.h"
/* Espressif FreeRTOS */
#ifndef SINGLE_THREADED
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/event_groups.h>
#endif
/* socket includes */
#include <lwip/netdb.h>
#include <lwip/sockets.h>
/* wolfSSL */
#include <wolfssl/wolfcrypt/settings.h>
#include "user_settings.h"
#include <wolfssl/ssl.h>
#ifdef WOLFSSL_TRACK_MEMORY
#include <wolfssl/wolfcrypt/mem_track.h>
#endif
#ifndef NO_DH
/* see also wolfssl/test.h */
#undef DEFAULT_MIN_DHKEY_BITS
#define DEFAULT_MIN_DHKEY_BITS 1024
#undef DEFAULT_MAX_DHKEY_BITS
#define DEFAULT_MAX_DHKEY_BITS 2048
#endif
#if defined(WOLFSSL_SM2) || defined(WOLFSSL_SM3) || defined(WOLFSSL_SM4)
#include <wolfssl/certs_test_sm.h>
#define CTX_CA_CERT root_sm2
#define CTX_CA_CERT_SIZE sizeof_root_sm2
#define CTX_CA_CERT_TYPE WOLFSSL_FILETYPE_PEM
#define CTX_CLIENT_CERT client_sm2
#define CTX_CLIENT_CERT_SIZE sizeof_client_sm2
#define CTX_CLIENT_CERT_TYPE WOLFSSL_FILETYPE_PEM
#define CTX_CLIENT_KEY client_sm2_priv
#define CTX_CLIENT_KEY_SIZE sizeof_client_sm2_priv
#define CTX_CLIENT_KEY_TYPE WOLFSSL_FILETYPE_PEM
#else
#include <wolfssl/certs_test.h>
#define CTX_CA_CERT ca_cert_der_2048
#define CTX_CA_CERT_SIZE sizeof_ca_cert_der_2048
#define CTX_CA_CERT_TYPE WOLFSSL_FILETYPE_ASN1
#define CTX_CLIENT_CERT client_cert_der_2048
#define CTX_CLIENT_CERT_SIZE sizeof_client_cert_der_2048
#define CTX_CLIENT_CERT_TYPE WOLFSSL_FILETYPE_ASN1
#define CTX_CLIENT_KEY client_key_der_2048
#define CTX_CLIENT_KEY_SIZE sizeof_client_key_der_2048
#define CTX_CLIENT_KEY_TYPE WOLFSSL_FILETYPE_ASN1
#endif
/* Project */
#include "wifi_connect.h"
#include "time_helper.h"
/* working TLS 1.2 VS client app commandline param:
*
* -h 192.168.1.128 -v 3 -l ECDHE-ECDSA-SM4-CBC-SM3 -c ./certs/sm2/client-sm2.pem -k ./certs/sm2/client-sm2-priv.pem -A ./certs/sm2/root-sm2.pem -C
*
* working Linux, non-working VS c app
*
* -h 192.168.1.128 -v 4 -l TLS13-SM4-CCM-SM3 -c ./certs/sm2/client-sm2.pem -k ./certs/sm2/client-sm2-priv.pem -A ./certs/sm2/root-sm2.pem -C
*
**/
static const char* const TAG = "tls_client";
#if defined(DEBUG_WOLFSSL)
int stack_start = -1;
int ShowCiphers(WOLFSSL* ssl)
{
#define CLIENT_TLS_MAX_CIPHER_LENGTH 4096
char ciphers[CLIENT_TLS_MAX_CIPHER_LENGTH];
const char* cipher_used;
int ret = 0;
if (ssl == NULL) {
ESP_LOGI(TAG, "WOLFSSL* ssl is NULL, so no cipher in use");
ret = wolfSSL_get_ciphers(ciphers, (int)sizeof(ciphers));
if (ret == WOLFSSL_SUCCESS) {
for (int i = 0; i < CLIENT_TLS_MAX_CIPHER_LENGTH; i++) {
if (ciphers[i] == ':') {
ciphers[i] = '\n';
}
}
ESP_LOGI(TAG, "Available Ciphers:\n%s\n", ciphers);
}
else {
ESP_LOGE(TAG, "Failed to call wolfSSL_get_ciphers. Error %d", ret);
}
}
else {
cipher_used = wolfSSL_get_cipher_name(ssl);
ESP_LOGI(TAG, "WOLFSSL* ssl using %s", cipher_used);
}
return ret;
}
#endif
#if defined(WOLFSSL_ESPWROOM32SE) && defined(HAVE_PK_CALLBACKS) \
&& defined(WOLFSSL_ATECC508A)
#include "wolfssl/wolfcrypt/port/atmel/atmel.h"
/* when you want to use custom slot allocation */
/* enable the definition CUSTOM_SLOT_ALLOCATION.*/
#if defined(CUSTOM_SLOT_ALLOCATION)
static byte mSlotList[ATECC_MAX_SLOT];
int atmel_set_slot_allocator(atmel_slot_alloc_cb alloc,
atmel_slot_dealloc_cb dealloc);
/* initialize slot array */
void my_atmel_slotInit()
{
int i;
for (i = 0; i < ATECC_MAX_SLOT; i++) {
mSlotList[i] = ATECC_INVALID_SLOT;
}
}
/* allocate slot depending on slotType */
int my_atmel_alloc(int slotType)
{
int i, slot = -1;
switch (slotType) {
case ATMEL_SLOT_ENCKEY:
slot = 2;
break;
case ATMEL_SLOT_DEVICE:
slot = 0;
break;
case ATMEL_SLOT_ECDHE:
slot = 0;
break;
case ATMEL_SLOT_ECDHE_ENC:
slot = 4;
break;
case ATMEL_SLOT_ANY:
for (i = 0; i < ATECC_MAX_SLOT; i++) {
if (mSlotList[i] == ATECC_INVALID_SLOT) {
slot = i;
break;
}
}
}
return slot;
}
/* free slot array */
void my_atmel_free(int slotId)
{
if (slotId >= 0 && slotId < ATECC_MAX_SLOT) {
mSlotList[slotId] = ATECC_INVALID_SLOT;
}
}
#endif /* CUSTOM_SLOT_ALLOCATION */
#endif /* WOLFSSL_ESPWROOM32SE && HAVE_PK_CALLBACK && WOLFSSL_ATECC508A */
/* client task */
WOLFSSL_ESP_TASK tls_smp_client_task(void* args)
{
#if defined(SINGLE_THREADED)
int ret = ESP_OK;
#define TLS_SMP_CLIENT_TASK_RET ret
#else
#define TLS_SMP_CLIENT_TASK_RET
#endif
char buff[256];
const char sndMsg[] = "GET /index.html HTTP/1.0\r\n\r\n";
const char* ch = TLS_SMP_TARGET_HOST; /* see wifi_connect.h */
struct sockaddr_in servAddr;
struct hostent *hp;
struct ip4_addr *ip4_addr;
int ret_i; /* interim return values */
int sockfd;
int doPeerCheck;
int sendGet;
#ifndef NO_DH
int minDhKeyBits = DEFAULT_MIN_DHKEY_BITS;
#endif
size_t len;
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx;
WOLFSSL* ssl;
wolfSSL_Debugging_ON();
WOLFSSL_ENTER(TLS_SMP_CLIENT_TASK_NAME);
doPeerCheck = 1;
sendGet = 0;
#ifdef DEBUG_WOLFSSL
WOLFSSL_MSG("Debug ON");
ShowCiphers(NULL);
#endif
/* Initialize wolfSSL */
wolfSSL_Init();
/* Create a socket that uses an Internet IPv4 address,
* Sets the socket to be stream based (TCP),
* 0 means choose the default protocol. */
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
ESP_LOGE(TAG, "ERROR: failed to create the socket\n");
}
ESP_LOGI(TAG, "get target IP address");
hp = gethostbyname(TLS_SMP_TARGET_HOST);
if (!hp) {
ESP_LOGE(TAG, "Failed to get host name.");
ip4_addr = NULL;
}
else {
ip4_addr = (struct ip4_addr *)hp->h_addr;
}
/* Create and initialize WOLFSSL_CTX */
ctx = wolfSSL_CTX_new(wolfSSLv23_client_method()); /* SSL 3.0 - TLS 1.3. */
/* options: */
/* ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method()); only TLS 1.2 */
/* ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method()); only TLS 1.3 */
/* wolfSSL_CTX_NoTicketTLSv12(); */
/* wolfSSL_NoTicketTLSv12(); */
if (ctx == NULL) {
ESP_LOGE(TAG, "ERROR: failed to create WOLFSSL_CTX\n");
}
#if defined(WOLFSSL_ESP32_CIPHER_SUITE)
ESP_LOGI(TAG, "Start SM2\n");
/*
*
* reference code for SM Ciphers:
*
#if defined(HAVE_AESGCM) && !defined(NO_DH)
#ifdef WOLFSSL_TLS13
defaultCipherList = "TLS13-AES128-GCM-SHA256"
#ifndef WOLFSSL_NO_TLS12
":DHE-PSK-AES128-GCM-SHA256"
#endif
;
#else
defaultCipherList = "DHE-PSK-AES128-GCM-SHA256";
#endif
#elif defined(HAVE_AESGCM) && defined(WOLFSSL_TLS13)
defaultCipherList = "TLS13-AES128-GCM-SHA256:PSK-AES128-GCM-SHA256"
#ifndef WOLFSSL_NO_TLS12
":PSK-AES128-GCM-SHA256"
#endif
;
#elif defined(HAVE_NULL_CIPHER)
defaultCipherList = "PSK-NULL-SHA256";
#elif !defined(NO_AES_CBC)
defaultCipherList = "PSK-AES128-CBC-SHA256";
#else
defaultCipherList = "PSK-AES128-GCM-SHA256";
#endif
*/
ret = wolfSSL_CTX_set_cipher_list(ctx, WOLFSSL_ESP32_CIPHER_SUITE);
if (ret == WOLFSSL_SUCCESS) {
ESP_LOGI(TAG, "Set cipher list: %s\n", WOLFSSL_ESP32_CIPHER_SUITE);
}
else {
ESP_LOGE(TAG, "ERROR: failed to set cipher list: %s\n", WOLFSSL_ESP32_CIPHER_SUITE);
}
#endif
#ifdef DEBUG_WOLFSSL
ShowCiphers(NULL);
ESP_LOGI(TAG,
"Stack used: %d\n",
CONFIG_ESP_MAIN_TASK_STACK_SIZE
- uxTaskGetStackHighWaterMark(NULL));
#endif
/* see user_settings PROJECT_DH for HAVE_DH and HAVE_FFDHE_2048 */
#ifndef NO_DH
ret = wolfSSL_CTX_SetMinDhKey_Sz(ctx, (word16)minDhKeyBits);
if (ret != SSL_SUCCESS) {
ESP_LOGE(TAG, "Error setting minimum DH key size");
}
#endif
/* no peer check */
if (doPeerCheck == 0) {
ESP_LOGW(TAG, "doPeerCheck == 0");
wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_NONE, 0);
}
else {
ESP_LOGW(TAG, "doPeerCheck != 0");
WOLFSSL_MSG("Loading... our cert");
/* load our certificate */
ret_i = wolfSSL_CTX_use_certificate_chain_buffer_format(ctx,
CTX_CLIENT_CERT,
CTX_CLIENT_CERT_SIZE,
CTX_CLIENT_CERT_TYPE);
if (ret_i != SSL_SUCCESS) {
ESP_LOGE(TAG, "ERROR: failed to load chain %d, please check the file.\n", ret_i);
}
/* Load client certificates into WOLFSSL_CTX */
WOLFSSL_MSG("Loading...cert");
ret_i = wolfSSL_CTX_load_verify_buffer(ctx,
CTX_CA_CERT,
CTX_CA_CERT_SIZE,
CTX_CA_CERT_TYPE);
ret_i = wolfSSL_CTX_use_PrivateKey_buffer(ctx,
CTX_CLIENT_KEY,
CTX_CLIENT_KEY_SIZE,
CTX_CLIENT_KEY_TYPE);
if(ret_i != SSL_SUCCESS) {
wolfSSL_CTX_free(ctx) ; ctx = NULL ;
ESP_LOGE(TAG, "ERROR: failed to load key %d, "
"please check the file.\n", ret_i) ;
}
wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_PEER, 0);
}
/* Initialize the server address struct with zeros */
memset(&servAddr, 0, sizeof(servAddr));
/* Fill in the server address */
servAddr.sin_family = AF_INET; /* using IPv4 */
servAddr.sin_port = htons(TLS_SMP_DEFAULT_PORT); /* on DEFAULT_PORT */
if (*ch >= '1' && *ch <= '9') {
/* Get the server IPv4 address from the command line call */
WOLFSSL_MSG("inet_pton");
if ((ret_i = inet_pton(AF_INET,
TLS_SMP_TARGET_HOST,
&servAddr.sin_addr)) != 1) {
ESP_LOGE(TAG, "ERROR: invalid address ret=%d\n", ret_i);
}
}
else {
servAddr.sin_addr.s_addr = ip4_addr->addr;
}
/* Connect to the server */
sprintf(buff,
"Connecting to server....%s(port:%d)",
TLS_SMP_TARGET_HOST,
TLS_SMP_DEFAULT_PORT);
WOLFSSL_MSG(buff);
printf("%s\n", buff);
if ((ret_i = connect(sockfd,
(struct sockaddr *)&servAddr,
sizeof(servAddr))) == -1) {
ESP_LOGE(TAG, "ERROR: failed to connect ret=%d\n", ret_i);
}
WOLFSSL_MSG("Create a WOLFSSL object");
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
ESP_LOGE(TAG, "ERROR: failed to create WOLFSSL object\n");
}
else {
#ifdef DEBUG_WOLFSSL
ESP_LOGI(TAG, "\nCreated WOLFSSL object:");
ShowCiphers(ssl);
#endif
}
#if defined(WOLFSSL_SM2)
/* SM TLS1.3 Cipher needs to have key share explicitly set. */
ret = wolfSSL_UseKeyShare(ssl, WOLFSSL_ECC_SM2P256V1);
if (ret == WOLFSSL_SUCCESS) {
ESP_LOGI(TAG, "Successfully set WOLFSSL_ECC_SM2P256V1");
}
else {
ESP_LOGE(TAG, "FAILED to set WOLFSSL_ECC_SM2P256V1");
}
#endif
/* when using atecc608a on esp32-wroom-32se */
#if defined(WOLFSSL_ESPWROOM32SE) && defined(HAVE_PK_CALLBACKS) \
&& defined(WOLFSSL_ATECC508A)
atcatls_set_callbacks(ctx);
/* when using custom slot-allocation */
#if defined(CUSTOM_SLOT_ALLOCATION)
my_atmel_slotInit();
atmel_set_slot_allocator(my_atmel_alloc, my_atmel_free);
#endif
#endif
/* Attach wolfSSL to the socket */
wolfSSL_set_fd(ssl, sockfd);
WOLFSSL_MSG("Connect to wolfSSL on the server side");
/* Connect to wolfSSL on the server side */
if (wolfSSL_connect(ssl) == SSL_SUCCESS) {
#ifdef DEBUG_WOLFSSL
ShowCiphers(ssl);
#endif
/* Get a message for the server from stdin */
WOLFSSL_MSG("Message for server: ");
memset(buff, 0, sizeof(buff));
if (sendGet) {
printf("SSL connect ok, sending GET...\n");
len = XSTRLEN(sndMsg);
strncpy(buff, sndMsg, len);
buff[len] = '\0';
}
else {
sprintf(buff, "message from esp32 tls client\n");
len = strnlen(buff, sizeof(buff));
}
/* Send the message to the server */
if (wolfSSL_write(ssl, buff, len) != len) {
ESP_LOGE(TAG, "ERROR: failed to write\n");
}
/* Read the server data into our buff array */
memset(buff, 0, sizeof(buff));
if (wolfSSL_read(ssl, buff, sizeof(buff) - 1) == -1) {
ESP_LOGE(TAG, "ERROR: failed to read\n");
}
/* Print to stdout any data the server sends */
printf("Server: ");
printf("%s\n", buff);
}
else {
ESP_LOGE(TAG, "ERROR: failed to connect to wolfSSL\n");
}
#ifdef DEBUG_WOLFSSL
ShowCiphers(ssl);
#endif
/* Cleanup and return */
wolfSSL_free(ssl); /* Free the wolfSSL object */
wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
close(sockfd); /* Close the connection to the server */
vTaskDelete(NULL);
return TLS_SMP_CLIENT_TASK_RET;
}
#if defined(SINGLE_THREADED)
/* we don't initialize a single thread, so no init function here */
#else
/* create task */
WOLFSSL_ESP_TASK tls_smp_client_init(void* args)
{
int ret;
#if ESP_IDF_VERSION_MAJOR >= 4
TaskHandle_t _handle;
#else
xTaskHandle _handle;
#endif
/* http://esp32.info/docs/esp_idf/html/dd/d3c/group__xTaskCreate.html */
ret = xTaskCreate(tls_smp_client_task,
TLS_SMP_CLIENT_TASK_NAME,
TLS_SMP_CLIENT_TASK_WORDS,
NULL,
TLS_SMP_CLIENT_TASK_PRIORITY,
&_handle);
if (ret != pdPASS) {
ESP_LOGI(TAG, "create thread %s failed", TLS_SMP_CLIENT_TASK_NAME);
}
return TLS_SMP_CLIENT_TASK_RET;
}
#endif