发送邮件到smtp服务器需要认证使用Dev c++
Sending mail to smtp server requiring authentication using Dev C++
我正在研究一个程序,该程序连接到tcp服务器,获得一些数据,并在某些条件下需要通过电子邮件发送警报。(我在帮别人做学校的作业)我正在使用devc++。
我已经好几年没有接触编程了,也从来没有在网络环境下做过任何编程。(希望你能理解)
我得到了TCP客户端和日志文件部分,但我不能得到邮件发送部分的工作。
由于我相对缺乏经验,我已经浪费了很多时间,例如,首先我想尝试POCO,但现在看起来你需要Visual c++来构建库。接下来,我尝试了jwsmtp,但是我能找到的示例没有进行身份验证,而现在身份验证似乎是必须的。接下来我尝试了libCurl,但是不能让例子工作,首先我得到CURLOPT_MAIL_FROM没有在这个范围内声明,我在一些帖子中读到这是由最新版本的错误引起的,然后curl头文件开始给出各种各样的错误。
我的问题是我现在快没时间了。我很想让这一切都自己工作,甚至学习足够编写自己的代码,而不仅仅是修改和粘贴示例,但我做出了承诺,最后期限没有给我这个选项。
有人可以帮助任何将实际工作在windows上使用devc++发送邮件到gmail帐户?
我假设您将使用Mingw和MSYS。我所做的是从:http://www.openssl.org/source/
下载最新的OpenSSL然后我打开MSYS并运行以下命令:
./configure mingw no-shared --prefix='C:/OpenSSL'
如果成功,应该打印Configured for mingw
。
接下来,我去了OpenSSL源代码,然后去了test文件夹。我打开md2test.c
,用#include "dummytest.c"
代替dummytest.c
。我对rc5test.c
和jpaketest.c
做了同样的事情。
接下来我运行了以下命令:
make depend && make install
这将构建静态库。如果您想构建共享库,那么您需要在第一个命令(./configure
行)中将no-shared
替换为shared
。
完成后,我创建了一些原始套接字并发送了以下电子邮件(需要在sendemail
函数内做一些错误检查,但我希望你能得到它的要点。它的工作原理):
/** © 2014, Brandon T. All Rights Reserved.
*
* This file is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
*/
#if defined _WIN32 || defined _WIN64
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#else
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#ifndef __cplusplus
typedef enum {false, true} bool;
#endif
bool ssl_init_count = 0;
typedef struct
{
int sock;
const char* address;
unsigned short port;
} sock_info;
typedef struct
{
SSL* ssl;
SSL_CTX* ctx;
} ssl_info;
typedef struct
{
char b64username[256];
char b64password[256];
} email;
bool initsocket()
{
#if defined _WIN32 || defined _WIN64
WSADATA wsaData = {0};
return !WSAStartup(MAKEWORD(2, 2), &wsaData);
#else
return true;
#endif
}
void destroysocket(sock_info* info)
{
#if defined _WIN32 || defined _WIN64
shutdown(info->sock, SD_BOTH);
closesocket(info->sock);
WSACleanup();
#else
shutdown(info->sock, SHUT_RDWR);
close(info->sock);
#endif
}
bool connectsocket(sock_info* info)
{
struct sockaddr_in* sockaddr_ipv4 = NULL;
struct addrinfo* it = NULL, *result = NULL;
getaddrinfo(info->address, NULL, NULL, &result);
for (it = result; it != NULL; it = it->ai_next)
{
sockaddr_ipv4 = (struct sockaddr_in*)it->ai_addr;
info->address = inet_ntoa(sockaddr_ipv4->sin_addr);
if (strncmp(info->address, "0.0.0.0", 7))
break;
}
freeaddrinfo(result);
if ((info->sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
perror("Error creating socket..");
return false;
}
struct sockaddr_in SockAddr;
memset(&SockAddr, 0, sizeof(SockAddr));
SockAddr.sin_port = htons(info->port);
SockAddr.sin_family = AF_INET;
SockAddr.sin_addr.s_addr = inet_addr(info->address);
if (connect(info->sock, (struct sockaddr*)&SockAddr, sizeof(SockAddr)) < 0)
{
perror("Error connecting socket..");
return false;
}
return true;
}
bool setssl(sock_info* sockinfo, ssl_info* sslinfo)
{
sslinfo->ctx = SSL_CTX_new(SSLv23_client_method());
if (sslinfo->ctx)
{
sslinfo->ssl = SSL_new(sslinfo->ctx);
SSL_set_fd(sslinfo->ssl, sockinfo->sock);
return SSL_connect(sslinfo->ssl) != -1;
}
return false;
}
void removessl(sock_info* sockinfo, ssl_info* sslinfo)
{
if (sslinfo->ctx)
{
SSL_CTX_free(sslinfo->ctx);
}
if (sslinfo->ssl)
{
SSL_shutdown(sslinfo->ssl);
SSL_free(sslinfo->ssl);
}
sslinfo->ssl = NULL;
sslinfo->ctx = NULL;
}
void initssl()
{
if (!ssl_init_count)
{
SSL_library_init();
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
}
++ssl_init_count;
}
void freessl()
{
if (!--ssl_init_count)
{
ERR_free_strings();
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
}
}
void sslb64encode(const char* buffer, char* outbuffer)
{
char* b64str = NULL;
BIO* b64 = BIO_new(BIO_f_base64());
BIO* mem = BIO_new(BIO_s_mem());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
b64 = BIO_push(b64, mem);
BIO_write(b64, buffer, strlen(buffer));
BIO_flush(b64);
int len = BIO_get_mem_data(mem, &b64str);
memcpy(outbuffer, b64str, len);
outbuffer[len] = ' ';
BIO_free_all(b64);
}
void initemail(const char* username, const char* password, email* outemail)
{
char ubuffer[256];
char pbuffer[256];
unsigned int bytes_written = 0;
sslb64encode(username, &ubuffer[0]);
sslb64encode(password, &pbuffer[0]);
sprintf(outemail->b64username, "%s", ubuffer);
sprintf(outemail->b64password, "%s", pbuffer);
}
bool printsocketbuffer(ssl_info* sslinfo)
{
char buffer[1024];
unsigned int bytes_read = SSL_read(sslinfo->ssl, &buffer[0], sizeof(buffer));
if (bytes_read > 0)
{
printf("%.*s", bytes_read, buffer);
return true;
}
return false;
}
void sendemail(ssl_info* sslinfo, const char* username, const char* password, const char* recipient, const char* from, const char* to, const char* message, const char* subject, unsigned int messagelen)
{
email em;
char buffer[512];
unsigned int bufflen = sizeof(buffer);
initemail(username, password, &em);
SSL_write(sslinfo->ssl, "HELOrn", 6);
printsocketbuffer(sslinfo);
SSL_write(sslinfo->ssl, "AUTH LOGINrn", 12);
printsocketbuffer(sslinfo);
bufflen = sprintf(buffer, "%srn", em.b64username);
SSL_write(sslinfo->ssl, buffer, bufflen);
printsocketbuffer(sslinfo);
bufflen = sprintf(buffer, "%srn", em.b64password);
SSL_write(sslinfo->ssl, buffer, bufflen);
printsocketbuffer(sslinfo);
printsocketbuffer(sslinfo);
bufflen = sprintf(buffer, "MAIL FROM: <%s>rn", username);
SSL_write(sslinfo->ssl, buffer, bufflen);
printsocketbuffer(sslinfo);
bufflen = sprintf(buffer, "RCPT TO: <%s>rn", recipient);
SSL_write(sslinfo->ssl, buffer, bufflen);
printsocketbuffer(sslinfo);
SSL_write(sslinfo->ssl, "DATArn", 6);
printsocketbuffer(sslinfo);
bufflen = sprintf(buffer, "From: <%s><%s>rn", from, username);
bufflen += sprintf(&buffer[bufflen], "To: <%s><%s>rn", to, recipient);
bufflen += sprintf(&buffer[bufflen], "Subject: <%s>rn", subject);
SSL_write(sslinfo->ssl, buffer, bufflen);
bufflen = 0;
while (bufflen < messagelen)
{
bufflen += SSL_write(sslinfo->ssl, &message[bufflen], messagelen - bufflen);
}
SSL_write(sslinfo->ssl, "rn.rn", 5);
printsocketbuffer(sslinfo);
SSL_write(sslinfo->ssl, "QUITrn", 6);
printsocketbuffer(sslinfo);
}
int main()
{
ssl_info sslinfo = {0};
sock_info sockinfo = {0, "smtp.gmail.com", 465};
const char* username = "ICantChooseUsernames@gmail.com";
const char* password = "*****";
const char* recipient = "ICantChooseUsernames@gmail.com";
const char* message = "hello there!";
const char* subject = "Testing Emails";
const char* from = "Brandon";
const char* to = "Brandon";
unsigned int messagelen = strlen(message);
if (initsocket())
{
if (connectsocket(&sockinfo))
{
initssl();
if (setssl(&sockinfo, &sslinfo))
{
sendemail(&sslinfo, username, password, recipient, from, to, message, subject, messagelen);
}
else
{
ERR_print_errors_fp(stderr);
}
removessl(&sockinfo, &sslinfo);
freessl();
}
destroysocket(&sockinfo);
}
return 0;
}
看来我不打算让这个工作。尝试了所有的openssl, mingw和msys目录。在与朋友交谈后,我得到了Visual Studio Express,并得到了一个c#示例,可以相当快地工作。在没有见过c#之前,我无法重写其他的东西,所以我只是修改了我的例子,使我从我的其他程序调用邮件发送应用程序。也许不是最好的方法,但是,嘿,它有效,我的时间到了。希望我能开始学习这些东西。谢谢你试图帮助这个无知的人,我真的很感激。
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