openssl客户端连接过程：SSL_connect(ssl)；返回0

目的基于openssl实现客户端远程连接
下面是部分接口代码

    SSL_library_init();
    OpenSSL_add_all_algorithms();
    SSL_load_error_strings();
    ctx = SSL_CTX_new(SSLv2_client_method());
    if (ctx == NULL) {
        ERR_print_errors_fp(stdout);
        exit(1);
    }

    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        perror("Socket");
        exit(errno);
    }
    printf("socket created\n");

    memset (&dest, '\0', sizeof(dest));
    dest.sin_family = AF_INET;
    dest.sin_port = htons(atoi(argv[2]));
    if (inet_aton(argv[1], (struct in_addr *) &dest.sin_addr.s_addr) == 0) {
        perror(argv[1]);
        exit(errno);
    }
    printf("address created\n");
    if (connect(sockfd, (struct sockaddr *) &dest, sizeof(dest)) != 0) {
        perror("Connect ");
        exit(errno);
    }
    printf("server connected\n");
    ssl = SSL_new(ctx);

    if(!SSL_CTX_load_verify_locations(ctx,  "/root/.ssh/ca-chain.cert.pem", NULL)){
        ERR_print_errors_fp(stderr);
        return 1;
    }

    if (SSL_CTX_use_PrivateKey_file(ctx, "/root/.ssh/client.key.pem", SSL_FILETYPE_PEM) <= 0){
        SSL_CTX_free (ctx);
        ERR_print_errors_fp(stderr);
        return 1;
    }

    if(!SSL_CTX_use_certificate_file(ctx, "/root/.ssh/client.cert.pem", SSL_FILETYPE_PEM)){
        fprintf (stderr, "SSL_CTX_use_certificate_file ERROR\n");
        ERR_print_errors_fp(stderr);
        return EXIT_FAILURE;
    }

    if (!SSL_CTX_check_private_key(ctx))  {  
        ERR_print_errors_fp(stdout);  
        exit(1);  
    } 

    if(SSL_get_verify_result(ssl) != X509_V_OK){
        printf("X509证书无效\n");
        return false;
    }

    SSL_set_fd(ssl, sockfd);
    if ((t=SSL_connect(ssl)) <= 0){        //返回0
        ERR_print_errors_fp(stderr);
    }
    else {
        printf("Connected with %s encryption\n", SSL_get_cipher(ssl));
        ShowCerts(ssl);
    }

服务端打印出的Bug：
routines:REQUEST_CERTIFICATE:peer error no certificate:s2_pkt.c:681:
是不是本地证书加载未成功？求指点。。。。

你客户端的证书没有送给服务器，所以验证不过。看你的客户端API加载的证书是否正确