wolfSSL 在这里提供了一个很好的参考示例：https ://github.com/wolfSSL/wolfssl-examples/blob/master/tls/server-tls.c
请在下面找到参考代码：
/* server-tls.c
*
* Copyright (C) 2006-2015 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
*=============================================================================
*
* This is a super basic example of what a TCP Server secured with TLS 1.2
* might look like. This server can also resume the session if a client
* inadvertantly disconnects.
*/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <errno.h>
/* include the wolfSSL library for our TLS 1.2 security */
#include <wolfssl/ssl.h>
#define DEFAULT_PORT 11111
int AcceptAndRead(WOLFSSL_CTX* ctx, socklen_t sockfd, struct sockaddr_in
clientAddr);
int AcceptAndRead(WOLFSSL_CTX* ctx, socklen_t sockfd, struct sockaddr_in
clientAddr)
{
/* Create our reply message */
const char reply[] = "I hear ya fa shizzle!\n";
socklen_t size = sizeof(clientAddr);
/* Wait until a client connects */
socklen_t connd = accept(sockfd, (struct sockaddr *)&clientAddr, &size);
/* If fails to connect,int loop back up and wait for a new connection */
if (connd == -1) {
printf("failed to accept the connection..\n");
}
/* If it connects, read in and reply to the client */
else {
printf("Client connected successfully\n");
WOLFSSL* ssl;
if ( (ssl = wolfSSL_new(ctx)) == NULL) {
fprintf(stderr, "wolfSSL_new error.\n");
exit(EXIT_FAILURE);
}
/* direct our ssl to our clients connection */
wolfSSL_set_fd(ssl, connd);
printf("Using Non-Blocking I/O: %d\n", wolfSSL_get_using_nonblock(
ssl));
for ( ; ; ) {
char buff[256];
int ret = 0;
/* Clear the buffer memory for anything possibly left over */
memset(&buff, 0, sizeof(buff));
/* Read the client data into our buff array */
if ((ret = wolfSSL_read(ssl, buff, sizeof(buff)-1)) > 0) {
/* Print any data the client sends to the console */
printf("Client: %s\n", buff);
/* Reply back to the client */
if ((ret = wolfSSL_write(ssl, reply, sizeof(reply)-1))
< 0)
{
printf("wolfSSL_write error = %d\n", wolfSSL_get_error(ssl, ret));
}
}
/* if the client disconnects break the loop */
else {
if (ret < 0)
printf("wolfSSL_read error = %d\n", wolfSSL_get_error(ssl
,ret));
else if (ret == 0)
printf("The client has closed the connection.\n");
break;
}
}
wolfSSL_free(ssl); /* Free the WOLFSSL object */
}
close(connd); /* close the connected socket */
return 0;
}
int main()
{
/* Create a ctx pointer for our ssl */
WOLFSSL_CTX* ctx;
/*
* Creates a socket that uses an internet IP address,
* Sets the type to be Stream based (TCP),
* 0 means choose the default protocol.
*/
socklen_t sockfd = socket(AF_INET, SOCK_STREAM, 0);
int loopExit = 0; /* 0 = False, 1 = True */
int ret = 0; /* Return value */
/* Server and client socket address structures */
struct sockaddr_in serverAddr = {0}, clientAddr = {0};
/* Initialize wolfSSL */
wolfSSL_Init();
/* If positive value, the socket is valid */
if (sockfd == -1) {
printf("ERROR: failed to create the socket\n");
return EXIT_FAILURE; /* Kill the server with exit status 1 */
}
/* create and initialize WOLFSSL_CTX structure */
if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method())) == NULL) {
fprintf(stderr, "wolfSSL_CTX_new error.\n");
return EXIT_FAILURE;
}
/* Load server certificate into WOLFSSL_CTX */
if (wolfSSL_CTX_use_certificate_file(ctx, "../certs/server-cert.pem",
SSL_FILETYPE_PEM) != SSL_SUCCESS) {
fprintf(stderr, "Error loading certs/server-cert.pem, please check"
"the file.\n");
return EXIT_FAILURE;
}
/* Load server key into WOLFSSL_CTX */
if (wolfSSL_CTX_use_PrivateKey_file(ctx, "../certs/server-key.pem",
SSL_FILETYPE_PEM) != SSL_SUCCESS) {
fprintf(stderr, "Error loading certs/server-key.pem, please check"
"the file.\n");
return EXIT_FAILURE;
}
/* load DH params */
ret = wolfSSL_CTX_SetTmpDH_file(ctx, "../certs/dh2048.pem" , SSL_FILETYPE_PEM);
if (ret != SSL_SUCCESS) {
fprintf(stderr, "Error setting DH parameters.\n");
return EXIT_FAILURE;
}
/* Initialize the server address struct to zero */
memset((char *)&serverAddr, 0, sizeof(serverAddr));
/* Fill the server's address family */
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = INADDR_ANY;
serverAddr.sin_port = htons(DEFAULT_PORT);
/* Attach the server socket to our port */
if (bind(sockfd, (struct sockaddr *)&serverAddr, sizeof(serverAddr))
< 0) {
printf("ERROR: failed to bind\n");
return EXIT_FAILURE;
}
printf("Waiting for a connection...\n");
/* Continuously accept connects while not currently in an active connection
or told to quit */
while (loopExit == 0) {
/* listen for a new connection, allow 5 pending connections */
ret = listen(sockfd, 5);
if (ret == 0) {
/* Accept client connections and read from them */
loopExit = AcceptAndRead(ctx, sockfd, clientAddr);
}
}
wolfSSL_CTX_free(ctx); /* Free WOLFSSL_CTX */
wolfSSL_Cleanup(); /* Free wolfSSL */
return EXIT_SUCCESS;
}