转载:http://blog.csdn.net/zengraoli/article/details/36866241
转载:http://blog.csdn.net/alger_magic/article/details/25164187
一、如果想单纯验证一个邮箱帐号是否存在，我们可以拿邮箱帐号和密码请求服务器验证。
.h文件
#ifndef _AUTHENTICATIONEMAIL_H_ #define _AUTHENTICATIONEMAIL_H_ #include <atlenc.h> #include <winsock2.h> #pragma comment(lib, "wsock32.lib") struct sMailInfo //邮件信息 { char *mailbox_user_name; //用户登录邮箱的名称 char *mailbox_user_pwd; //用户登录邮箱的密码 char *mailbox_sender_show_name; //用户发送时显示的名称 char *mailbox_sender; //发送者的邮箱地址 char *mailbox_receiver; //接收者的邮箱地址 char mail_server_ip_addr[32]; //服务器的IP char *mail_server_name; //服务器的名称（IP与名称二选一，优先取名称） sMailInfo() { memset(this, 0, sizeof(sMailInfo)); } }; class CAuthentic { public: CAuthentic(); ~CAuthentic(); void Char2Base64(char *buff_64, char *src_buff, int length);//把char类型转换成Base64类型 bool CReateSocket(SOCKET &sock); //建立socket连接 bool Login(SOCKET &sock); //登录邮箱，主要进行发邮件前的准备工作 void Init(sMailInfo &smail_info); protected: char send_buff_[4096]; //发送缓冲区 char receive_buff_[1024]; sMailInfo mail_info_; };
.cpp文件
#include "AuthenticationEmail.h" #pragma warning(disable:4996) CAuthentic::CAuthentic() { memset(send_buff_, 0, sizeof(send_buff_)); memset(receive_buff_, 0, sizeof(receive_buff_)); } CAuthentic::~CAuthentic() { } void CAuthentic::Char2Base64(char *buff_64, char *src_buff, int length) { //1 1 1 1 1 1 1 1 // 分配给pBuff64 ↑ 分配给pBuff64+1 // point所在的位置 static char base_64_encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";//base64所映射的字符表 int point; // 每一个源字符拆分的位置，可取2,4,6；初始为2 point = 2; int base_index; // base64字符的索引 char n = 0; // 上一个源字符的残留值 for(int index = 0; index < length; index++) { if(point == 2) { base_index = ((*src_buff) >> point) & 0x3f; // 取得pSrcBuff的高point位 } else if (point == 4) { base_index = ((*src_buff) >> point) & 0xf; // 取得pSrcBuff的高point位 } else if(point == 6) { base_index = ((*src_buff) >> point) & 0x3; // 取得pSrcBuff的高point位 } base_index += n; // 与pSrcBuff-1的低point结合组成Base64的索引 *buff_64++ = base_64_encode[base_index]; // 由索引表得到pBuff64 n = ((*src_buff) << (6 - point)); // 计算源字符中的残留值 n = n & 0x3f; //确保n的最高两位为0 point += 2; //源字符的拆分位置上升2 if(point == 8) //如果拆分位置为8说明pSrcBuff有6位残留，可以组成一个完整的Base64字符，所以直接再组合一次 { base_index = (*src_buff) & 0x3f; //提取低6位，这就是索引了 *buff_64++ =base_64_encode[base_index]; n = 0; // 残留值为0 point = 2; // 拆分位置设为2 } src_buff++; } if(n != 0) { *buff_64++ = base_64_encode[n]; } if(length % 3 == 2) // 如果源字符串长度不是3的倍数要用'='补全 { *buff_64 = '='; } else if(length % 3 == 1) { *buff_64++ = '='; *buff_64 = '='; } } bool CAuthentic::CReateSocket(SOCKET &sock) { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 2, 2 ); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return false; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2 ) { WSACleanup(); return false; } sock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP); if (sock == INVALID_SOCKET) { return false; } sockaddr_in server_addr; memset(&server_addr, 0, sizeof(sockaddr_in)); server_addr.sin_family = AF_INET; server_addr.sin_port = htons(25); // 发邮件一般都是25端口，SSL的是465端口 if(mail_info_.mail_server_name == "") { server_addr.sin_addr.s_addr = inet_addr(mail_info_.mail_server_ip_addr); // 直接使用IP地址 } else { struct hostent *hp = gethostbyname(mail_info_.mail_server_name); // 使用名称 server_addr.sin_addr.s_addr = *(int*)(*hp->h_addr_list); char* ip = inet_ntoa(server_addr.sin_addr); strcpy(mail_info_.mail_server_ip_addr, ip); } int ret = connect(sock, (sockaddr*)&server_addr, sizeof(server_addr)); // 建立连接 if (ret == SOCKET_ERROR) { return false; } return true; } bool CAuthentic::Login(SOCKET &sock) { recv(sock, receive_buff_, 1024, 0); memset(send_buff_, 0, sizeof(send_buff_)); sprintf_s(send_buff_, "HELO %s ", mail_info_.mail_server_ip_addr); send(sock,send_buff_, strlen(send_buff_), 0); // 开始会话 memset(receive_buff_, 0, sizeof(receive_buff_)); recv(sock,receive_buff_, 1024, 0); if(receive_buff_[0] != '2' || receive_buff_[1] != '5' || receive_buff_[2] != '0') { return false; } memset(send_buff_, 0, sizeof(send_buff_)); sprintf_s(send_buff_, "AUTH LOGIN "); send(sock,send_buff_, strlen(send_buff_),0); // 请求登录 recv(sock,receive_buff_, 1024, 0); if(receive_buff_[0] != '3' || receive_buff_[1] != '3' || receive_buff_[2] != '4') { return false; } memset(send_buff_, 0, sizeof(send_buff_)); Char2Base64(send_buff_, mail_info_.mailbox_user_name, strlen(mail_info_.mailbox_user_name)); send_buff_[strlen(send_buff_)] = ' '; send_buff_[strlen(send_buff_)] = ' '; send(sock,send_buff_, strlen(send_buff_), 0); // 发送用户名 recv(sock,receive_buff_, 1024, 0); if(receive_buff_[0] != '3' || receive_buff_[1] != '3' || receive_buff_[2] != '4') { return false; } memset(send_buff_, 0, sizeof(send_buff_)); Char2Base64(send_buff_, mail_info_.mailbox_user_pwd, strlen(mail_info_.mailbox_user_pwd)); send_buff_[strlen(send_buff_)] = ' '; send_buff_[strlen(send_buff_)] = ' '; send(sock, send_buff_, strlen(send_buff_), 0); // 发送用户密码 recv(sock, receive_buff_, 1024, 0); if(receive_buff_[0] != '2' || receive_buff_[1] != '3' || receive_buff_[2] != '5') { return false; } return true; // 登录成功 } void CAuthentic::Init(sMailInfo &smail_info) { memcpy(&mail_info_, &smail_info, sizeof(smail_info)); }
二、测试使用
这里我用的163来测试,具体换成存在的邮箱测试
#include "AuthenticationEmail.h" //验证邮箱 void Authenticate() { CSendMail mail; sMailInfo info; info.mail_server_name = "smtp.163.com";//邮件服务器名称 info.mailbox_receiver = "receiver@qq.com";//收件人邮箱帐号 info.mailbox_sender = "sender@163.com";//发送者邮箱帐号 info.mailbox_user_name = "sendername";//发送者名字 info.mailbox_user_pwd = "xxxxxxxxx";//发送者邮箱密码 mail.Init(info); SOCKET sock; // 建立连接 if(mail.CReateSocket(sock)) { if(mail.Logon(sock)) // 登录邮箱 { ::MessageBox(NULL,_T("验证成功"),_T("tip"),MB_OK); } } } int _tmain(int argc, _TCHAR* argv[]) { Authenticate(); return 0; }