Re: mailsmtp_auth_sasl instead of mailsmtp_auth

DINH Viêt Hoà <[email protected]> Wed, 21 Jun 2006 01:18:17 +0200

Newsgroups	gmane.mail.libetpan.user
Message-ID	<[email protected]>

On 20 Jun 2006, at 08:17, Matt Ronge wrote:

> Hi,
>
> I've been using mailsmtp_auth but I've recently run into a problem  
> where
>    it wasn't working on a gmail SMTP server. After taking a look at
> mailsmtp.h I noticed that mailsmtp_auth is now deprecated.
>
> Here's the new function:
> int mailesmtp_auth_sasl(mailsmtp * session, const char * auth_type,
>      const char * server_fqdn,
>      const char * local_ip_port,
>      const char * remote_ip_port,
>      const char * login, const char * auth_name,
>      const char * password, const char * realm);
>
> However, I'm not sure how to get started with it. Is there any
> documentation for this? What are the available auth_type's? What is  
> the
> server_fqdn? What about the local port? Auth_name? realm? Does anyone
> have an example of this function in use?
>
> (Please point me to the appropriate RFC if I'm missing something)
> Thanks,

on google smtp, you need to start tls before authenticating.
I attached a code that I tested with my account. This code worked for  
google smtp.


-- 
DINH Viêt Hoà

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smtptest.c (application/octet-stream, 2.9 KB)

#include <libetpan/libetpan.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

static int fill_remote_ip_port(mailstream * stream, char * remote_ip_port,
                               size_t remote_ip_port_len)
{
  mailstream_low * low;
  int fd;
  struct sockaddr_in name;
  socklen_t namelen;
  char remote_ip_port_buf[128];
  int r;
  
  low = mailstream_get_low(stream);
  fd = mailstream_low_get_fd(low);
  
  namelen = sizeof(name);
  r = getpeername(fd, (struct sockaddr *) &name, &namelen);
  if (r < 0)
    return -1;
  
  if (inet_ntop(AF_INET, &name.sin_addr, remote_ip_port_buf,
          sizeof(remote_ip_port_buf)))
    return -1;
  
  snprintf(remote_ip_port, remote_ip_port_len, "%s;%i",
      remote_ip_port_buf, ntohs(name.sin_port));
  
  return 0;
}

static int fill_local_ip_port(mailstream * stream, char * local_ip_port,
                               size_t local_ip_port_len)
{
  mailstream_low * low;
  int fd;
  struct sockaddr_in name;
  socklen_t namelen;
  char local_ip_port_buf[128];
  int r;
  
  low = mailstream_get_low(stream);
  fd = mailstream_low_get_fd(low);
  
  namelen = sizeof(name);
  r = getpeername(fd, (struct sockaddr *) &name, &namelen);
  if (r < 0)
    return -1;
  
  if (inet_ntop(AF_INET, &name.sin_addr, local_ip_port_buf,
          sizeof(local_ip_port_buf)))
    return -1;
  
  snprintf(local_ip_port, local_ip_port_len, "%s;%i",
      local_ip_port_buf, ntohs(name.sin_port));
  
  return 0;
}

int main(void)
{
  mailsmtp * smtp;
  mailstream_low * low;
  int fd;
  mailstream_low * new_low;
  char local_ip_port_buf[128];
  char remote_ip_port_buf[128];
  char * local_ip_port;
  char * remote_ip_port;
  int r;
  
  mailstream_debug = 1;
  smtp = mailsmtp_new(0, NULL);
  /* check error */
  
  mailsmtp_socket_connect(smtp, "smtp.gmail.com", 25);
  /* check error */

  mailesmtp_ehlo(smtp);
  /* check error */

  mailesmtp_starttls(smtp);
  /* check error */
  
  low = mailstream_get_low(smtp->stream);
  fd = mailstream_low_get_fd(low);
  new_low = mailstream_low_tls_open(fd);
  /* check error */
  
  mailstream_low_free(low);
  mailstream_set_low(smtp->stream, new_low);
  
  mailesmtp_ehlo(smtp);
  /* check error */
  
  r = fill_local_ip_port(smtp->stream, local_ip_port_buf,
      sizeof(local_ip_port_buf));
  if (r < 0)
    local_ip_port = NULL;
  else
    local_ip_port = local_ip_port_buf;
    
  r = fill_remote_ip_port(smtp->stream, remote_ip_port_buf,
      sizeof(remote_ip_port_buf));
  if (r < 0)
    remote_ip_port = NULL;
  else
    remote_ip_port = remote_ip_port_buf;
  
  r = mailesmtp_auth_sasl(smtp, "PLAIN",
      "smtp.gmail.com",
      local_ip_port, remote_ip_port,
      "[email protected]", "[email protected]",
      "password", "smtp.gmail.com");
  
  /*
    in most case, login = auth_name = user@domain
    and realm = server hostname full qualified domain name
  */
  
  /* check error */
  
  return 0;
}