下面是server 和client 的代码。用没跑过，但是用类似的代码跑了。流程是这样的。要注意的是openssl中ssl连接建立前用阻塞的socket，建立后可以设置非阻塞。openssl每个操作后最好检查下是否成功。
/************server*************************/
#include <string.h>
#include <iostream>
#include <winsock2.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#pragma comment (lib,"WS2_32.lib")
#pragma comment( lib, "libeay32.lib" )
#pragma comment( lib, "ssleay32.lib" )
char buffer[10001] = {0};
int main()
{
SSL_library_init(); //初始化SSL库
OpenSSL_add_all_algorithms(); //支持所有算法
SSL_load_error_strings(); //提供将错误号解析为字符串的功能
SSL *ssl = NULL;
SSL_CTX *ssl_ctx = NULL;
SSL_METHOD *ssl_method = NULL;
X509 *client_cert = NULL;
//设置客户端使用的SSL版本
//ssl_method = SSLv3_server_method();
ssl_method = SSLv23_server_method();
//创建SSL上下文环境 每个进程只需维护一个SSL_CTX结构体
ssl_ctx = SSL_CTX_new(ssl_method);
//验证对方
SSL_CTX_set_verify(ssl_ctx,SSL_VERIFY_PEER,NULL);
//若验证,则放置CA证书
SSL_CTX_load_verify_locations(ssl_ctx, "cacert.pem", NULL);
//设置pass phrase
SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, "pass phrase");
//读取证书文件
SSL_CTX_use_certificate_file(ssl_ctx,"*****Cert.pem",SSL_FILETYPE_PEM);
//读取密钥文件
SSL_CTX_use_PrivateKey_file(ssl_ctx,"*****Key.pem",SSL_FILETYPE_PEM);
//验证密钥是否与证书一致
SSL_CTX_check_private_key(ssl_ctx);
/*构建随机数生成机制,WIN32平台必需*/
srand( (unsigned)time( NULL ) );
for( int i = 0; i < 100;i++ )
seed_int[i] = rand();
RAND_seed(seed_int, sizeof(seed_int));
//设置加密方式
//SSL_CTX_set_cipher_list(ssl_ctx,"RC4-MD5");
//建立TCP服务器端、开始监听并接受客户端连接请求
// 初始化 Winsock.
WSADATA wsaData;
int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
if ( iResult != NO_ERROR )
{
//失败
return -1;
}
// 建立socket
server = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
if ( server == INVALID_SOCKET )
{
//失败
WSACleanup();
return -2;
}
// 绑定socket
sockaddr_in service;
service.sin_family = AF_INET;
//service.sin_addr.s_addr = inet_addr("127.0.0.1");
service.sin_addr.s_addr = INADDR_ANY;
service.sin_port = htons( 8899 );
if ( bind( server, (SOCKADDR*) &service, sizeof(service) ) == SOCKET_ERROR )
{
//失败
closesocket(server);
return -3;
}
// 监听 socket
if ( listen( server, 10 ) == SOCKET_ERROR )
{
//失败
return -4;
}
do
{
sClient = accept(server,NULL,NULL);
Sleep(100);
}while(sClient == INVALID_SOCKET);
//创建当前连接的SSL结构体
ssl = SSL_new(ssl_ctx);
//将SSL绑定到套接字上
SSL_set_fd(ssl, sClient);
//接受SSL链接
SSL_accept(ssl);
//获取和释放客户端证书
client_cert = SSL_get_peer_certificate(ssl);
//打印所有加密算法的信息(可选)
std::cout<<"SSL connection using"<<SSL_get_cipher(ssl)<<std::endl;
X509_free(client_cert);
//unsigned long cmd;
//if (SOCKET_ERROR == ioctlsocket(sClient, FIONBIO, &cmd))
//{
//创建套接字时发生错误，非阻塞设置失败
//ErrorProcess();
//closesocket(sClient);
//}
while(true)
{
SSL_read(ssl, buffer, 10000);
memset(buffer,0,10000);
SSL_write(ssl, "hello, world!", sizeof("hello, world!"));
Sleep(1000);
}
//断开SSL链接
SSL_shutdown(ssl);
//释放当前SSL链接结构体
SSL_free(ssl);
//断开TCP链接
closesocket(sClient);
//释放SSL上下文
SSL_CTX_free(ssl_ctx);
return 0;
}
/**************client*********************/
#include <iostream>
#include <string.h>
#include <winsock2.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#pragma comment (lib,"WS2_32.lib")
#pragma comment( lib, "libeay32.lib" )
#pragma comment( lib, "ssleay32.lib" )
int main(int argc, _TCHAR* argv[])
{
SOCKET client;
char buffer[256] = {0};
int seed_int[100]; /*存放随机序列*/
SSL *ssl = NULL;
SSL_CTX *ssl_ctx = NULL;
SSL_METHOD *ssl_method = NULL;
X509 *server_cert = NULL;
SSL_library_init(); //init libraries
OpenSSL_add_all_algorithms(); //支持所有算法
SSL_load_error_strings(); //提供将错误号解析为字符串的功能
//设置客户端使用的SSL版本
ssl_method = SSLv3_client_method();
//创建SSL上下文环境 每个进程只需维护一个SSL_CTX结构体
ssl_ctx = SSL_CTX_new(ssl_method);
/*构建随机数生成机制,WIN32平台必需*/
srand( (unsigned)time( NULL ) );
for( int i = 0; i < 100;i++ )
seed_int[i] = rand();
RAND_seed(seed_int, sizeof(seed_int));
/* Load the RSA CA certificate into the SSL_CTX structure */
/* This will allow this client to verify the server's */
/* certificate. */
SSL_CTX_load_verify_locations(ssl_ctx, "cacert.pem", NULL);
/* Set flag in context to require peer (server) certificate verification */
SSL_CTX_set_verify(ssl_ctx,SSL_VERIFY_PEER,NULL);
SSL_CTX_set_verify_depth(ssl_ctx,1);
SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, "pass phrase");
//读取证书文件
SSL_CTX_use_certificate_file(ssl_ctx,"******Cert.pem",SSL_FILETYPE_PEM);
//读取密钥文件
SSL_CTX_use_PrivateKey_file(ssl_ctx,"******Key.pem",SSL_FILETYPE_PEM);
//验证密钥是否与证书一致
SSL_CTX_check_private_key(ssl_ctx);
//建立TCP链接
// 初始化 Winsock.
WSADATA wsaData;
int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
if ( iResult != NO_ERROR )
{
//AfxMessageBox("Error at WSAStartup()!");
return;
}
// 建立socket socket.
client = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
if ( client == INVALID_SOCKET )
{
//AfxMessageBox("Error at socket!");
WSACleanup();
return;
}
// 连接到服务器.
sockaddr_in clientService;
clientService.sin_family = AF_INET;
clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );
clientService.sin_port = htons( 8899 );
if ( connect( client, (SOCKADDR*) &clientService, sizeof(clientService) ) == SOCKET_ERROR)
{
//AfxMessageBox( "Failed to connect!" );
WSACleanup();
return;
}
//unsigned long cmd;
//if (SOCKET_ERROR == ioctlsocket(client, FIONBIO, &cmd))
//{
// //AfxMessageBox( "创建套接字时发生错误，非阻塞设置失败：");
// closesocket(client);
//}
//创建维护当前连接信息的SSL结构体
ssl = SSL_new(ssl_ctx);
//将SSL绑定到套接字上
SSL_set_fd(ssl, client);
//建立SSL链接
SSL_connect(ssl);
//获取服务器端证书
server_cert = SSL_get_peer_certificate(ssl);
//释放服务器端证书
X509_free(server_cert);
unsigned long cmd;
if (SOCKET_ERROR == ioctlsocket(client, FIONBIO, &cmd))
{
//AfxMessageBox( "创建套接字时发生错误，非阻塞设置失败：");
closesocket(client);
}
while(true)
{
SSL_write(ssl, "hello, world!", sizeof("hello, world!")；
SSL_read(ssl, buffer, 255);
printf("received: %s\n",buffer);
memset(buffer,0,255);
Sleep(1000);
}
//断开SSL链接
SSL_shutdown(ssl);
//释放当前SSL链接结构体
SSL_free(ssl);
closesocket(client);
//释放上下文
SSL_CTX_free(ssl_ctx);
return 0;
}
