最近在学习SSL的相关知识，自己查资料利用OpenSSL实现了服务端和客户端程序，并自签名了证书，能实现数据的加密通信，但想把客户端改成Wininet,却怎么也不能成功，Wininet客户端部分测试mail.google.com可以返回网页数据，所以觉得可能还是服务端问题，
基于OpenSSL实现的服务端代码
#include <stdio.h> #include <stdlib.h> #include <memory.h> #include <errno.h> #include <sys/types.h> #include <winsock2.h> #include <openssl/rsa.h> /* SSLeay stuff */ #include <openssl/crypto.h> #include <openssl/x509.h> #include <openssl/pem.h> #include <openssl/ssl.h> #include <openssl/err.h> #pragma comment(lib, "ssleay32.lib") #pragma comment(lib, "libeay32.lib") /*所有需要的参数信息都在此处以#define的形式提供*/ #define CERTF "server.crt" /*服务端的证书(需经CA签名)*/ #define KEYF "server.key" /*服务端的私钥(建议加密存储)*/ #define CACERT "ca.crt" /*CA 的证书*/ #define PORT 443 /*准备绑定的端口*/ #define CHK_NULL(x) if ((x)==NULL) exit (1) #define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); } #define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr); exit(2); } void main () { int err; int listen_sd; int sd; int client_len; SSL_CTX* ctx; SSL* ssl; X509* client_cert; char* str; char buf [4096]; SSL_METHOD *meth; WSADATA wsaData; struct sockaddr_in sa_serv; struct sockaddr_in sa_cli; if(WSAStartup(MAKEWORD(2,2),&wsaData) != 0) { printf("WSAStartup()fail:%d\n",GetLastError()); return; } /* SSL preliminaries. We keep the certificate and key with the context. */ SSL_load_error_strings(); /*为打印调试信息作准备*/ OpenSSL_add_ssl_algorithms(); /*初始化*/ meth = SSLv3_server_method(); /*采用什么协议(SSLv2/SSLv3/TLSv1)在此指定,TLSv1_server_method,SSLv23_server_method()*/ ctx = SSL_CTX_new (meth); //CHK_NULL(ctx); if (!ctx) { printf("创建SSL_CTX失败!\n"); exit(2); } //设置为要求强制校验对方（客户端）证书SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT SSL_CTX_set_verify(ctx,SSL_VERIFY_NONE,NULL); /*验证与否SSL_VERIFY_PEER*/ //SSL_CTX_load_verify_locations(ctx,CACERT,NULL); /*若验证,则放置CA证书*/ if (SSL_CTX_use_certificate_file(ctx, CERTF, SSL_FILETYPE_PEM) <= 0) { printf("加载证书失败!\n"); exit(3); } if (SSL_CTX_use_PrivateKey_file(ctx, KEYF, SSL_FILETYPE_PEM) <= 0) { printf("加载私钥失败!\n"); exit(4); } if (!SSL_CTX_check_private_key(ctx)) { printf("密钥证书不匹配！\n"); exit(5); } SSL_CTX_set_cipher_list(ctx,"RC4-MD5"); SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY); /* ----------------------------------------------- */ /* Prepare TCP socket for receiving connections */ /*开始正常的TCP socket过程.................................*/ printf("Begin TCP socket...\n"); listen_sd = socket (AF_INET, SOCK_STREAM, 0); CHK_ERR(listen_sd, "socket"); memset (&sa_serv, '\0', sizeof(sa_serv)); sa_serv.sin_family = AF_INET; sa_serv.sin_addr.s_addr = INADDR_ANY; sa_serv.sin_port = htons (PORT); /* Server Port number */ err = bind(listen_sd, (struct sockaddr*) &sa_serv, sizeof (sa_serv)); CHK_ERR(err, "bind"); /*接受TCP链接*/ err = listen (listen_sd, 5); CHK_ERR(err, "listen"); client_len = sizeof(sa_cli); sd = accept (listen_sd, (struct sockaddr*) &sa_cli, (int*)&client_len); CHK_ERR(sd, "accept"); closesocket (listen_sd); printf ("Connection from %s, port %d\n", inet_ntoa(sa_cli.sin_addr), sa_cli.sin_port); /* ----------------------------------------------- */ /*TCP连接已建立,进行服务端的SSL过程. */ printf("Begin server side SSL\n"); ssl = SSL_new (ctx); CHK_NULL(ssl); SSL_set_fd (ssl, sd); err = SSL_accept (ssl); printf("SSL_accept finished\n"); CHK_SSL(err); /*打印所有加密算法的信息(可选)*/ printf ("SSL connection using %s\n", SSL_get_cipher (ssl)); /*得到客户端的证书并打印些信息(可选) */ /*client_cert = SSL_get_peer_certificate (ssl); if (client_cert != NULL) { printf ("Client certificate:\n"); str = X509_NAME_oneline (X509_get_subject_name (client_cert), 0, 0); CHK_NULL(str); printf ("\t subject: %s\n", str); OPENSSL_free (str); str = X509_NAME_oneline (X509_get_issuer_name (client_cert), 0, 0); CHK_NULL(str); printf ("\t issuer: %s\n", str); OPENSSL_free (str); //如不再需要,需将证书释放 X509_free (client_cert); } else printf ("Client does not have certificate.\n");*/ /* 数据交换开始,用SSL_write,SSL_read代替write,read */ int inlen = 0, nread = 0; for ( nread = 0; nread < sizeof(buf); nread += inlen ) { inlen = SSL_read(ssl, buf+nread,sizeof(buf)-nread); CHK_SSL(inlen); if ( inlen <=0 ) break;//出错或客户端无数据 fwrite(buf+nread, 1,inlen, stdout);//将接收到的信息打印到标准输出 } buf[nread] = '\0'; printf ("Got %d chars:'%s'\n", nread, buf); err = SSL_write (ssl, "I hear you.", strlen("I hear you.")); CHK_SSL(err); SSL_shutdown(ssl);//关闭SSL连接 closesocket (sd); SSL_free (ssl); SSL_CTX_free (ctx); } /* EOF - serv.cpp */