wolfssl-w32/IDE/VS-AZURE-SPHERE/client/client.c

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/* client.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.h"
/* the usual suspects */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* socket includes */
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
/* utility functions shared between client and server */
#include <shared/util.h>
/* wolfSSL */
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/ssl.h>
#include <wolfssl/certs_test.h>
/* Azure Sphere */
#include <applibs/networking.h>
int main(int argc, char** argv)
{
bool isNetworkingReady = false;
SOCKET_T sockfd = 0;
char buff[256];
size_t len;
int ret;
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx = NULL;
WOLFSSL* ssl = NULL;
util_PrintIfAddr();
/* Check if the Azure Sphere Dev Board has network connectivity. */
if ((Networking_IsNetworkingReady(&isNetworkingReady) < 0) || !isNetworkingReady) {
fprintf(stderr, "ERROR: network is not up.\n");
return -1;
}
ret = wolfIO_TcpConnect(&sockfd, SERVER_IP, DEFAULT_PORT, 0);
if ((ret != 0) || ((int)sockfd < 0)) {
fprintf(stderr, "ERROR: failed to create socket.");
return -1;
}
/* Initialize wolfSSL */
wolfSSL_Init();
/* Create and initialize WOLFSSL_CTX */
ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method());
if (ctx == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Load client certificates into WOLFSSL_CTX */
ret = wolfSSL_CTX_load_verify_buffer(ctx, CERT, SIZEOF_CERT, WOLFSSL_FILETYPE_ASN1);
if (ret != SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load client certificate, "
"please check the buffer.\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Attach wolfSSL to the socket */
wolfSSL_set_fd(ssl, sockfd);
/* Connect to wolfSSL on the server side */
if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Get length of message for server. */
printf("\nMessage for server: %s\n",msg);
len = strnlen(msg, sizeof(msg));
/* Send the message to the server */
if (wolfSSL_write(ssl, msg, (int)len) != len) {
fprintf(stderr, "ERROR: failed to write\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Read the server data into our buff array */
memset(buff, 0, sizeof(buff));
if (wolfSSL_read(ssl, buff, sizeof(buff) - 1) == -1) {
fprintf(stderr, "ERROR: failed to read\n");
util_Cleanup(sockfd,ctx,ssl);
return -1;
}
/* Print to stdout any data the server sends */
printf("Server Reply: %s\n", buff);
/* Cleanup and return */
util_Cleanup(sockfd,ctx,ssl);
return 0; /* Return reporting a success */
}