208 lines
6.7 KiB
C
208 lines
6.7 KiB
C
/* server.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
|
|
*/
|
|
|
|
#include "server.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>
|
|
|
|
/* <shared/util.h> includes */
|
|
#include <shared/util.h>
|
|
|
|
/* wolfSSL */
|
|
#include <wolfssl/ssl.h>
|
|
#include <wolfssl/certs_test.h>
|
|
|
|
/* Azure Sphere */
|
|
#include <applibs/log.h>
|
|
#include <applibs/networking.h>
|
|
|
|
#define BIND_PORT 11111
|
|
#define CERT_BUF server_cert_der_2048
|
|
#define SIZEOF_CERT_BUF sizeof_server_cert_der_2048
|
|
#define KEY_BUF server_key_der_2048
|
|
#define SIZEOF_KEY_BUF sizeof_server_key_der_2048
|
|
|
|
int main(void)
|
|
{
|
|
bool isNetworkingReady = false;
|
|
int sockfd;
|
|
int connd;
|
|
struct sockaddr_in servAddr;
|
|
struct sockaddr_in clientAddr;
|
|
socklen_t size = sizeof(clientAddr);
|
|
char buff[256];
|
|
size_t len;
|
|
int shutdown = 0;
|
|
int ret;
|
|
const char* reply = "I hear ya fa shizzle!\n";
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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) {
|
|
fprintf(stderr, "ERROR: failed to create the socket\n");
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Create and initialize WOLFSSL_CTX */
|
|
if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method())) == NULL) {
|
|
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Load server certificates into WOLFSSL_CTX */
|
|
if (wolfSSL_CTX_use_certificate_buffer(ctx, CERT_BUF, SIZEOF_CERT_BUF, SSL_FILETYPE_ASN1)
|
|
!= SSL_SUCCESS) {
|
|
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
|
|
CERT_BUF);
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Load server key into WOLFSSL_CTX */
|
|
if (wolfSSL_CTX_use_PrivateKey_buffer(ctx, KEY_BUF, SIZEOF_KEY_BUF, SSL_FILETYPE_ASN1)
|
|
!= SSL_SUCCESS) {
|
|
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
|
|
KEY_BUF);
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* 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(BIND_PORT); /* on BIND_PORT */
|
|
servAddr.sin_addr.s_addr = INADDR_ANY; /* from anywhere */
|
|
|
|
/* Bind the server socket to our port */
|
|
if (bind(sockfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) == -1) {
|
|
fprintf(stderr, "ERROR: failed to bind\n");
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Listen for a new connection, allow 5 pending connections */
|
|
if (listen(sockfd, 5) == -1) {
|
|
fprintf(stderr, "ERROR: failed to listen\n");
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Continue to accept clients until shutdown is issued */
|
|
while (!shutdown) {
|
|
printf("Waiting for a connection...\n");
|
|
|
|
/* Accept client connections */
|
|
if ((connd = accept(sockfd, (struct sockaddr*)&clientAddr, &size))
|
|
== -1) {
|
|
fprintf(stderr, "ERROR: failed to accept the connection\n\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, connd);
|
|
|
|
/* Establish TLS connection */
|
|
ret = wolfSSL_accept(ssl);
|
|
if (ret != SSL_SUCCESS) {
|
|
fprintf(stderr, "wolfSSL_accept error = %d\n",
|
|
wolfSSL_get_error(ssl, ret));
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
printf("Client connected successfully\n");
|
|
|
|
/* Read the client 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 client sends */
|
|
printf("Client: %s\n", buff);
|
|
|
|
/* Check for server shutdown command */
|
|
if (strncmp(buff, "shutdown", 8) == 0) {
|
|
printf("Shutdown command issued!\n");
|
|
shutdown = 1;
|
|
}
|
|
|
|
/* Write our reply into buff */
|
|
memset(buff, 0, sizeof(buff));
|
|
memcpy(buff, reply, strlen(reply));
|
|
len = strnlen(buff, sizeof(buff));
|
|
|
|
/* Reply back to the client */
|
|
if (wolfSSL_write(ssl, buff, (int)len) != len) {
|
|
fprintf(stderr, "ERROR: failed to write\n");
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return -1;
|
|
}
|
|
|
|
/* Cleanup after this connection */
|
|
wolfSSL_free(ssl); /* Free the wolfSSL object */
|
|
close(connd); /* Close the connection to the client */
|
|
}
|
|
|
|
printf("Shutdown complete\n");
|
|
|
|
/* Cleanup and return */
|
|
util_Cleanup(sockfd, ctx, ssl);
|
|
return 0; /* Return reporting a success */
|
|
}
|