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https://gitee.com/Zhaoxin59/my-chat_-server.git
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263 lines
7.5 KiB
C++
263 lines
7.5 KiB
C++
#pragma once
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#include <iostream>
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#include <string>
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#include <chrono>
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#include <random>
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#include <ctime>
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#include <cstring> // for memset
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <openssl/buffer.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <unistd.h>
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class SendEmail
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{
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// 请确保在链接器设置中加入 libssl.lib 与 libcrypto.lib（或通过 vcpkg 自动集成）
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public:
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using ptr = std::shared_ptr<SendEmail>;
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// 辅助函数：通过 SSL 发送数据，并检查返回值
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bool sendSSL(SSL* ssl, const std::string& msg, const char* label)
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{
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int bytesSent = SSL_write(ssl, msg.c_str(), static_cast<int>(msg.length()));
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if (bytesSent <= 0) {
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std::cerr << "Failed to send " << label << " message via SSL." << std::endl;
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ERR_print_errors_fp(stderr);
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return false;
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}
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return true;
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}
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std::string base64_encode(const std::string& input)
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{
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BIO* bmem = BIO_new(BIO_s_mem());
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BIO* b64 = BIO_new(BIO_f_base64());
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BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
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b64 = BIO_push(b64, bmem);
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BIO_write(b64, input.c_str(), static_cast<int>(input.length()));
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BIO_flush(b64);
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BUF_MEM* bptr;
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BIO_get_mem_ptr(b64, &bptr);
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std::string result(bptr->data, bptr->length);
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BIO_free_all(b64);
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return result;
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}
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// 辅助函数：通过 SSL 接收数据，并打印输出
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bool recvSSL(SSL* ssl, char* buff, int buffSize, const char* label)
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{
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int bytesReceived = SSL_read(ssl, buff, buffSize);
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if (bytesReceived <= 0) {
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std::cerr << "Failed to receive " << label << " message via SSL." << std::endl;
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ERR_print_errors_fp(stderr);
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return false;
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}
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buff[bytesReceived] = '\0';
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std::cout << label << " response: " << buff << std::endl;
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return true;
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}
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/// <summary>
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/// 发送邮件到指定邮箱
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/// </summary>
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/// <param name="收件人邮箱"></param>
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/// <returns>成功 = true，失败 = false</returns>
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bool SEND_email(const std::string& email)
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{
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// 1. DNS解析 smtp.qq.com（使用端口 465）
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struct addrinfo hints = {};
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hints.ai_family = AF_INET; // IPv4
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hints.ai_socktype = SOCK_STREAM; // TCP
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struct addrinfo* addrResult = nullptr;
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int ret = getaddrinfo("smtp.qq.com", "465", &hints, &addrResult);
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if (ret != 0 || addrResult == nullptr) {
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std::cerr << "DNS resolution failed: " << gai_strerror(ret) << std::endl;
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return false;
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}
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// 2. 建立 TCP 连接
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int sock = socket(addrResult->ai_family, addrResult->ai_socktype, addrResult->ai_protocol);
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if (sock == -1) {
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std::cerr << "Socket creation failed!" << std::endl;
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freeaddrinfo(addrResult);
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return false;
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}
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if (connect(sock, addrResult->ai_addr, addrResult->ai_addrlen) != 0) {
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std::cerr << "Connection failed!" << std::endl;
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close(sock);
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freeaddrinfo(addrResult);
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return false;
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}
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freeaddrinfo(addrResult);
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// 3. 初始化 OpenSSL
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SSL_library_init();
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SSL_load_error_strings();
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OpenSSL_add_all_algorithms();
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const SSL_METHOD* method = TLS_client_method();
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SSL_CTX* sslCtx = SSL_CTX_new(method);
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if (!sslCtx) {
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std::cerr << "Unable to create SSL context." << std::endl;
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close(sock);
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return false;
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}
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SSL* ssl = SSL_new(sslCtx);
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if (!ssl) {
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std::cerr << "Unable to create SSL structure." << std::endl;
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 绑定 socket 到 SSL
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SSL_set_fd(ssl, sock);
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if (SSL_connect(ssl) <= 0) {
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std::cerr << "SSL_connect failed." << std::endl;
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ERR_print_errors_fp(stderr);
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 4. 读取服务器欢迎信息
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char buff[2048] = { 0 };
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if (!recvSSL(ssl, buff, sizeof(buff) - 1, "Server")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 5. 发送 EHLO 命令
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std::string sendMsg = "EHLO localhost\r\n";
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if (!sendSSL(ssl, sendMsg, "EHLO") || !recvSSL(ssl, buff, sizeof(buff) - 1, "EHLO")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 6. 认证流程：AUTH LOGIN
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sendMsg = "AUTH LOGIN\r\n";
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if (!sendSSL(ssl, sendMsg, "AUTH") || !recvSSL(ssl, buff, sizeof(buff) - 1, "AUTH")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 7. 发送用户名（Base64编码后的）
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std::string username = base64_encode("zxiao_xin@qq.com") + "\r\n";
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if (!sendSSL(ssl, username, "Username") || !recvSSL(ssl, buff, sizeof(buff) - 1, "Username")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 8. 发送密码（Base64编码后的）
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std::string password = base64_encode("ydfslvabdryvejai") + "\r\n";
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if (!sendSSL(ssl, password, "Password") || !recvSSL(ssl, buff, sizeof(buff) - 1, "Password")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 9. 设置发件人
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sendMsg = "MAIL FROM:<zxiao_xin@qq.com>\r\n";
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if (!sendSSL(ssl, sendMsg, "MAIL FROM") || !recvSSL(ssl, buff, sizeof(buff) - 1, "MAIL FROM")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 10. 设置收件人
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sendMsg = "RCPT TO:<" + email + ">\r\n";
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if (!sendSSL(ssl, sendMsg, "RCPT TO") || !recvSSL(ssl, buff, sizeof(buff) - 1, "RCPT TO")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 检查回复是否为成功代码
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std::string s = buff;
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s = s.substr(0, 3);
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if (s != "250") {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 11. 命令 DATA
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sendMsg = "DATA\r\n";
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if (!sendSSL(ssl, sendMsg, "DATA") || !recvSSL(ssl, buff, sizeof(buff) - 1, "DATA")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 12. 生成验证码
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std::default_random_engine engine(static_cast<unsigned int>(std::time(nullptr)));
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std::uniform_int_distribution<int> distribution(10000, 99999);
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std::string verificationCode = std::to_string(distribution(engine));
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_verifyCode = verificationCode;
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// 13. 构造邮件头和正文
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sendMsg =
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"From: \"Mysterious系统\" <zxiao_xin@qq.com>\r\n"
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"Reply-To: \"请勿回复\" <no-reply@qq.com>\r\n"
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"To: <" + email + ">\r\n"
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"Subject: Mysterious验证码\r\n"
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"Content-Type: text/plain; charset=UTF-8\r\n"
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"\r\n"
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"这是您的验证码: " + verificationCode + "\r\n"
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"用于身份验证，请勿泄露。如非本人操作，请忽略此邮件。\r\n"
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"\r\n.\r\n";
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if (!sendSSL(ssl, sendMsg, "Email DATA") || !recvSSL(ssl, buff, sizeof(buff) - 1, "DATA send")) {
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return false;
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}
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// 14. 命令 QUIT
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sendMsg = "QUIT\r\n";
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sendSSL(ssl, sendMsg, "QUIT");
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recvSSL(ssl, buff, sizeof(buff) - 1, "QUIT");
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// 15. 清理资源
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SSL_shutdown(ssl);
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SSL_free(ssl);
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SSL_CTX_free(sslCtx);
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close(sock);
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return true;
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}
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std::string getVerifyCode() {
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return _verifyCode;
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}
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private:
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// std::string _email;
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std::string _verifyCode;
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};
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