Windows下安装OpenSSL

翻译

本文另有英文版本。

最近由于做题需要，得在 Windows 下使用 OpenSSL，以前一直是通过 MSYS/MinGW 来编译的，编译完成后可以得到 libcrypto.a 和 libssl.a 两个静态库（也会生成 dll 但是我一般喜欢用静态的），用 gcc 编译代码的时候加上 -lssl -lcrypto 就能用。然而这些库只能用在 MinGW 里，没法用在 Visual Studio 里，而 MinGW 对 Win32 API 的支持是实在不敢称赞。所以今天研究了一下用 VC 编译的方法。

工具

Visual Studio 2017
OpenSSL 1.1.1a
ActivePerl 5.26.1

步骤

0x0. 看了一下 OpenSSL 的说明，在 Windows 平台上的编译是通过 nmake 调用 cl 和 link 来自动编译的。在 VS2017 里选上 C++ 的工作负载之后，就会安装上 cl、link、nmake 这些工具。可以参考微软的说明：How to get the command-line tools。

0x1. 通常这些工具的路径并不在 $PATH 里，而微软也提供了构建环境的脚本，只要在命令提示符里运行这些脚本就能配置好环境。脚本位于 VS2017 安装目录下的 VC\Auxiliary\Build 里。启动命令提示符后，运行 vcvarsall.bat [目标架构]，设置环境（亲测 PowerShell 没用，得进到 cmd，这里选择了 x64 架构）。

运行 vcvarsall.bat 配置构建环境

0x2. 进入 OpenSSL 的目录，用 Perl 运行 Configure 脚本：perl .\Configure VC-WIN64A no-asm。（目标平台 VC-WIN64A，由于我没装 NASM 所以用 no-asm 选项不使用汇编源码）

0x3. 运行 nmake 编译，nmake test 测试，之后等着就行了。（活这么久还是第一次见直接命令行用 cl 编译程序……）

使用 nmake 编译 OpenSSL

0x4. 编译完成后如果运行 nmake install_sw，就会把产生的 lib、dll、exe 复制到安装目录（默认是 %ProgramW6432%\OpenSSL），注意不要运行 nmake install，否则会安装上一堆 HTML 的文档页面。

0x5. 使用的时候，要设置项目的属性，在包含目录和库目录里分别加上 OpenSSL 安装路径下的 include 和 lib 文件夹。并在源代码中添加上对应的预处理指令。

Visual Studio 中的 OpenSSL 项目属性

1
2
#pragma comment(lib, "libcrypto.lib")
#pragma comment(lib, "libssl.lib")

0x6. 上面那样链接的是动态的 dll 库，运行的时候需要 bin 文件夹下的 libcrypto-1_1-x64.dll 和 libssl-1_1-x64.dll，没有这两个 dll 程序就运行不了了。不知道为什么，OpenSSL 编译产生了静态库 libcrypto_static.lib 和 libssl_static.lib，但是没有安装到 lib 下，手工把这两个文件复制过来，就可以通过下面的方法链接静态库了。

1
2
#pragma comment(lib, "libcrypto_static.lib")
#pragma comment(lib, "libssl_static.lib")

0x7. 最后吐槽一句：M$ 的软件真 tnd 难用 ~~（除了 VSCode）~~！

ZJUWLAN autoconnect(Windows)

success

浙三本终于有了 WPA2 和 802.1x，再也不需要打开网页登录了。

OpenSSL 装好之后顺便重续了一下之前写的 ZJUWLAN 自动认证程序，Windows 平台和 Unix 的差别主要在头文件上，以及使用 socket 之前要先启动一下，其他代码基本相同：

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/*
 * Copyright (c) 2018, Nagi
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <string.h>
#include <WinSock2.h>
#include <Ws2tcpip.h>
#include <openssl/ssl.h>

#define DEBUG

#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "libcrypto_static.lib")
#pragma comment(lib, "libssl_static.lib")

const char net_zju_host[] = "net.zju.edu.cn";
const char net_zju_auth_path[] = "/include/auth_action.php";
const char net_zju_ok[] = "login_ok,";
const char *user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36";

#define T_SUCCESS 0
#define T_INFO 1
#define T_ERROR 2

void output(int type, const char *fmt, ...)
{
    va_list args;
    switch (type) {
    case T_SUCCESS: printf("[+] "); break;
    case T_ERROR: printf("[-] "); break;
    default: printf("[i] "); break;
    }
    va_start(args, fmt);
    vprintf(fmt, args);
    va_end(args);
    putchar('\n');
    if (type == T_ERROR) exit(1);
}

void init_ssl()
{
    SSL_load_error_strings();
    SSL_library_init();
}

SSL_CTX *create_ctx()
{
    SSL_CTX *ctx;
    int result;
    ctx = SSL_CTX_new(TLS_method());
    if (ctx == NULL) output(T_ERROR, "SSL_CTX_new() failed");
    result = SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
    if (result == 0) {
        SSL_CTX_free(ctx);
        output(T_ERROR, "SSL_CTX_set_min_proto_version() failed");
    }
    return ctx;
}

SSL *connect_ssl(SSL_CTX *ctx, int fd)
{
    SSL *ssl;
    int result;
    ssl = SSL_new(ctx);
    if (ssl == NULL) output(T_ERROR, "SSL_new() failed");
    result = SSL_set_fd(ssl, fd);
    if (result != 1) output(T_ERROR, "SSL_set_fd() failed");
    result = SSL_connect(ssl);
    if (result != 1) output(T_ERROR, "SSL handshake failed");
    return ssl;
}

static const char urlencode_chars[] = {
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,
    1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,
    1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};

int urlencode(const char *in, char *out)
{
    int i, printed = 0;
    unsigned char n1, n2;
    for (i = 0; in[i] != '\0'; i++) {
        if (urlencode_chars[(unsigned)in[i]] != 0) {
            n1 = ((unsigned char)in[i]) >> 4;
            n2 = ((unsigned char)in[i]) & 0xF;
            out[printed++] = '%';
            out[printed++] = n1 > 9 ? '7' + n1 : '0' + n1;
            out[printed++] = n2 > 9 ? '7' + n2 : '0' + n2;
        } else out[printed++] = in[i];
    }
    out[printed] = '\0';
    return printed;
}

int generate_post(char *buf, char *username, char *password)
{
    int printed = 0, content_len;
    char data_buf[256];
    printed += sprintf(buf + printed, "POST %s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\nOrigin: https://%s\r\n", net_zju_auth_path, net_zju_host, net_zju_host);
    printed += sprintf(buf + printed, "X-Requested-With: XMLHttpRequest\r\nContent-Type: application/x-www-form-urlencoded\r\nReferer: https://%s/srun_portal_pc.php?&ac_id=3\r\n", net_zju_host);
    printed += sprintf(buf + printed, "Accept-Encoding: gzip, deflate, br\r\nAccept-Language: zh-CN,zh;q=0.9\r\nUser-Agent: %s\r\n", user_agent);
    memset(data_buf, 0, sizeof(data_buf));
    content_len = 0;
    content_len += sprintf(data_buf + content_len, "action=login&username=");
    content_len += urlencode(username, data_buf + content_len);
    content_len += sprintf(data_buf + content_len, "&password=");
    content_len += urlencode(password, data_buf + content_len);
    content_len += sprintf(data_buf + content_len, "&ac_id=3&user_ip=&nas_ip=&user_mac=&save_me=0&ajax=1");
    printed += sprintf(buf + printed, "Content-Length: %d\r\n\r\n%s", content_len, data_buf);
    return printed;
}

void send_post(SSL *ssl, char *buf, size_t size)
{
    size_t send = 0, this_send;
    int result;
    output(T_INFO, "Sending the POST request to server");
#ifdef DEBUG
    puts(buf);
#endif
    while (send < size) {
        result = SSL_write_ex(ssl, buf + send, size - send, &this_send);
        if (result != 1) output(T_ERROR, "SSL_write_ex() failed");
        send += this_send;
        output(T_INFO, "Sent %ld/%ld bytes", send, size);
    }
}

void recv_result(SSL *ssl, char *buf, size_t size)
{
    size_t recv = 0, this_recv;
    int result;
    output(T_INFO, "Receiving the reply");
    while (1) {
        result = SSL_read_ex(ssl, buf + recv, size - recv, &this_recv);
        if (result != 1) break;
        recv += this_recv;
        output(T_INFO, "%ld bytes receivied", recv);
    }
    buf[recv] = '\0';
#ifdef DEBUG
    puts(buf);
#endif
}

void final_ssl(SSL *ssl, SSL_CTX *ctx)
{
    SSL_shutdown(ssl);
    SSL_free(ssl);
    SSL_CTX_free(ctx);
}

int main(int argc, char *argv[], char *envp[])
{
    WORD myVersionRequest;
    WSADATA wsaData;
    SOCKET auth_sock;
    int result, post_size, err;
    struct sockaddr_in net_zju_addr;
    char post_buf[1024], recv_buf[1024], net_zju_ip[16];
    char *username, *password, *pos;
    struct hostent *resolve_result;
    SSL_CTX *ctx;
    SSL *ssl;

    if (argc > 3) {
        output(T_INFO, "Usage: %s <username> <password>", argv[0]);
        exit(1);
    }
    username = "just-a-test-username";
    password = "just-a-test-password-0123456789abcdef";
    if (argc > 2) password = argv[2];
    if (argc > 1) username = argv[1];
    myVersionRequest = MAKEWORD(1, 1);
    err = WSAStartup(myVersionRequest, &wsaData);
    if (err) output(T_ERROR, "WSAStartup() failed.");
    memset(post_buf, 0, sizeof(post_buf));
    init_ssl();
    ctx = create_ctx();
    resolve_result = gethostbyname(net_zju_host);
    if (resolve_result == NULL) output(T_ERROR, "gethostbyname() failed");
    if (resolve_result->h_addrtype != AF_INET) output(T_ERROR, "Can't get IPv4 address");
    net_zju_addr.sin_family = AF_INET;
    net_zju_addr.sin_port = htons(443);
    memcpy(&(net_zju_addr.sin_addr), resolve_result->h_addr_list[0], 4);
    inet_ntop(AF_INET, &(net_zju_addr.sin_addr), net_zju_ip, sizeof(net_zju_ip));
    output(T_INFO, "Using the IP address %s", net_zju_ip);
    auth_sock = socket(AF_INET, SOCK_STREAM, 0);
    if (auth_sock < 0) output(T_ERROR, "socket() failed");
    result = connect(auth_sock, (struct sockaddr *)&net_zju_addr, sizeof(struct sockaddr));
    if (result != 0) output(T_ERROR, "connect() failed");
    output(T_INFO, "Connected to net.zju.edu.cn");
    ssl = connect_ssl(ctx, auth_sock);
    post_size = generate_post(post_buf, username, password);
    send_post(ssl, post_buf, (size_t)post_size);
    recv_result(ssl, recv_buf, sizeof(recv_buf));
    pos = strstr(recv_buf, net_zju_ok);
    if (pos != NULL) output(T_SUCCESS, "Auth succeed");
    else {
        pos = strstr(recv_buf, "\r\n\r\n");
        if (pos != NULL) output(T_ERROR, "Auth failed, %s", pos + 4);
        else output(T_ERROR, "Auth failed");
    }
    final_ssl(ssl, ctx);
    return 0;
}

估计也没几个人电脑上有 OpenSSL……所以我上传了一个编译完的程序，通过命令行传递用户名和密码运行。也可以在手工修改这个程序 .rdata 里面 username 和 password 的默认值之后，直接双击运行。

Contents

工具

步骤

ZJUWLAN autoconnect(Windows)