OVMS3/OVMS.V3/components/wolfssl/IDE/MQX/client-tls.c

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/* client-tls.c
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* 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 02110-1301, USA
*/
/* wolfSSL */
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/ssl.h>
#define DEFAULT_PORT 11111
#define CERT_FILE "../certs/ca-cert.pem"
int main(int argc, char** argv)
{
int sockfd;
struct sockaddr_in servAddr;
char buff[256];
size_t len;
int ret;
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx;
WOLFSSL* ssl;
/* Check for proper calling convention */
if (argc != 2) {
printf("usage: %s <IPv4 address>\n", argv[0]);
return 0;
}
/* 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) {
fprintf(stderr, "ERROR: failed to create the socket\n");
ret = -1;
goto end;
}
/* 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(DEFAULT_PORT); /* on DEFAULT_PORT */
/* Get the server IPv4 address from the command line call */
if (inet_pton(AF_INET, argv[1], &servAddr.sin_addr, sizeof(servAddr.sin_addr)) != 1) {
fprintf(stderr, "ERROR: invalid address\n");
ret = -1;
goto end;
}
/* Connect to the server */
if ((ret = connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr)))
== -1) {
fprintf(stderr, "ERROR: failed to connect\n");
goto end;
}
/*---------------------------------*/
/* Start of security */
/*---------------------------------*/
/* Initialize wolfSSL */
if ((ret = wolfSSL_Init()) != WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: Failed to initialize the library\n");
goto socket_cleanup;
}
/* Create and initialize WOLFSSL_CTX */
if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
ret = -1;
goto socket_cleanup;
}
/* Load client certificates into WOLFSSL_CTX */
if ((ret = wolfSSL_CTX_load_verify_locations(ctx, CERT_FILE, NULL))
!= SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
CERT_FILE);
goto ctx_cleanup;
}
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
ret = -1;
goto ctx_cleanup;
}
/* Attach wolfSSL to the socket */
if ((ret = wolfSSL_set_fd(ssl, sockfd)) != WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: Failed to set the file descriptor\n");
goto cleanup;
}
/* Connect to wolfSSL on the server side */
if ((ret = wolfSSL_connect(ssl)) != SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
goto cleanup;
}
/* Get a message for the server from stdin */
printf("Message for server: ");
memset(buff, 0, sizeof(buff));
if (fgets(buff, sizeof(buff), stdin) == NULL) {
fprintf(stderr, "ERROR: failed to get message for server\n");
ret = -1;
goto cleanup;
}
len = strnlen(buff, sizeof(buff));
/* Send the message to the server */
if ((ret = wolfSSL_write(ssl, buff, len)) != len) {
fprintf(stderr, "ERROR: failed to write entire message\n");
fprintf(stderr, "%d bytes of %d bytes were sent", ret, (int) len);
goto cleanup;
}
/* Read the server data into our buff array */
memset(buff, 0, sizeof(buff));
if ((ret = wolfSSL_read(ssl, buff, sizeof(buff)-1)) == -1) {
fprintf(stderr, "ERROR: failed to read\n");
goto cleanup;
}
/* Print to stdout any data the server sends */
printf("Server: %s\n", buff);
/* Cleanup and return */
cleanup:
wolfSSL_free(ssl); /* Free the wolfSSL object */
ctx_cleanup:
wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
socket_cleanup:
close(sockfd); /* Close the connection to the server */
end:
return ret; /* Return reporting a success */
}