/* greeting can be multi line */
static int read_greetings(void)
{
int
lcnt=0,
rc=(-1);
rc=read_smtp_line();
if (rc < 0)
goto cleanup;
s_esmtp=g_esmtp; /* if forced with -ehlo */
if (smtp_code != 220)
{
read_smtp_multi_lines();
errorMsg("Expected smtp code 220, got %d\n",smtp_code);
rc=(-1);
goto cleanup;
}
if (mutilsStristr(smtp_line,"ESMTP"))
{
s_esmtp=1;
}
/* greeting can be multi-line */
if (smtp_sep == A_DASH)
{
for (;;)
{
rc=read_smtp_line();
if (rc < 0)
break;
lcnt++;
if (lcnt >= 100)
{
errorMsg("Too many greeting lines\n");
rc=(-1);
goto cleanup;
}
if (mutilsStristr(smtp_line,"ESMTP"))
{
s_esmtp=1;
}
if (smtp_sep != A_DASH)
break;
}
}
cleanup:
smtp_sep = A_SPACE;
return(rc);
}
int read_smtp_multi_lines(void)
{
int
rc,
lcnt = 0;
if (smtp_sep == A_DASH)
{
for (;;)
{
rc=read_smtp_line();
if (rc < 0)
break;
lcnt++;
if (lcnt >= 100)
{
errorMsg("Too many lines from server\n");
rc=(-1);
goto ExitProcessing;
}
if (smtp_sep != A_DASH)
break;
}
}
smtp_sep = A_SPACE;
return(0);
ExitProcessing:
return(1);
}
/* SMTP: RCPT TO */
static int smtp_RCPT_TO(void)
{
Sll
*l,
*al;
Address
*a;
char
*x;
int
rc;
al=getAddressList();
for (l=al; l; l=l->next)
{
a=(Address *) l->data;
if (! a)
return(-1);
if (! a->address)
return(-1);
memset(buf,0,sizeof(buf));
x=getenv("NOTIFY_RCPT");
if (x != NULL)
{
/* MS Exchange has it */
showVerbose("NOTIFY_RCPT=%s\n",x);
(void) snprintf(buf,sizeof(buf)-1,"RCPT TO: %s %s\r\n",
a->address,x);
}
else
{
(void) snprintf(buf,sizeof(buf)-1,"RCPT TO: <%s>\r\n",a->address);
}
showVerbose("[C] %s",buf);
msock_puts(buf);
rc=read_smtp_line();
if (rc == 0)
{
if (smtp_code != 250)
{
errorMsg("RCPT TO: <%s> failed '%d:%s'\n",
a->address,smtp_code,smtp_line);
smtp_RSET();
return(-1);
}
}
}
return (0);
}
/* SMTP: quit */
static int smtp_QUIT(void)
{
showVerbose("[C] QUIT\r\n");
msock_puts("QUIT\r\n");
read_smtp_line();
/*
** google does not seem to write anything back in response to QUIT
** command. I'll ignore it anyway
*/
return(0);
}
int smtp_start_tls(int sfd)
{
int
rc=(-1);
#ifdef HAVE_OPENSSL
SSL
*ssl=NULL;
#endif /* HAVE_OPENSSL */
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"%s\r\n","STARTTLS");
showVerbose("[C] %s",buf);
msock_puts(buf);
rc=read_smtp_line();
if (smtp_code != 220)
{
errorMsg("Unknown STARTTLS response code %d\n",smtp_code);
return(-1);
}
#ifdef HAVE_OPENSSL
ssl=msock_get_ssl();
if (ssl)
{
if (!SSL_set_fd(ssl,sfd))
{
errorMsg("failed to set socket to SSL\n");
return(-1);
}
/* must set back to msock's static */
msock_set_ssl(ssl);
rc=SSL_connect(ssl);
if (rc < 1)
{
errorMsg("SSL connection failed\n");
ERR_print_errors_fp(stderr);
return(-1);
}
print_cert_info(ssl);
/* tell msock everything is ssl after that */
msock_turn_ssl_on();
rc=0;
}
else
{
errorMsg("Could not start STARTTLS, SSL not initialized properly");
rc=(-1);
}
#else
errorMsg("Not Compiled with OpenSSL, will not try STARTTLS");
rc=(-1);
#endif /*HAVE_OPENSSL */
return(rc);
}
/* SMTP: HELO */
static int say_helo(char *helo_domain)
{
int
cnt=0,
rc;
(void) snprintf(buf,sizeof(buf)-1,"%s %s\r\n",
s_esmtp ? "EHLO" : "HELO",helo_domain);
showVerbose("[C] %s",buf);
/* send */
msock_puts(buf);
rc=read_smtp_line();
if (smtp_code != 250)
{
errorMsg("%s failed", s_esmtp ? "EHLO" : "HELO");
return(-1);
}
/* read all the capabilities if separator is - */
if (smtp_sep == A_DASH)
{
for (;;)
{
rc=read_smtp_line();
if (rc == 0)
add_server_cap_to_list(smtp_line);
cnt++;
if (cnt >= 1000)
break;
if (rc < 0 || smtp_sep != A_DASH)
break;
}
}
smtp_sep = A_SPACE;
return(rc);
}
/* SMTP: MAIL FROM */
static int smtp_MAIL_FROM(char *from)
{
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"MAIL FROM: <%s>\r\n",from);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 250)
{
errorMsg("MAIL FROM failed: '%d %s'",smtp_code,smtp_line);
return(-1);
}
return(0);
}
/* SMTP: DATA */
static int smtp_DATA(void)
{
int
rc;
msock_puts("DATA\r\n");
showVerbose("[C] DATA\r\n");
rc=read_smtp_line();
if (rc == 0)
{
if (smtp_code != 354)
{
errorMsg("DATA failed: '%d %s'\n",smtp_code,smtp_line);
return(-1);
}
}
return(0);
}
/* return 0 on success, -1 on failure */
int smtpEom(int sfd)
{
int
rc;
msock_puts("\r\n.\r\n");
showVerbose("\r\n[C] .\r\n");
/*
** Bug# 1
** we want to see smtp code 250 now
** if mail is too big, it can mail with 552 message too large
*/
rc = read_smtp_line();
if (smtp_code != 250)
{
errorMsg("Expected smtp code 250, got %d\n",smtp_code);
rc = (-1);
}
return(rc);
}
/* aborts current mail transaction and cause both ends to reset */
static int smtp_RSET()
{
msock_puts("RSET\r\n");
return(read_smtp_line());
}
/* returns 0 on success, -1 on failure */
int send_the_mail(char *from,char *to,char *cc,char *bcc,char *sub,
char *smtp_server,int smtp_port,char *helo_domain,
char *attach_file,char *txt_msg_file,char *the_msg,int is_mime,char *rrr,char *rt,
int add_dateh)
{
SOCKET
sfd;
TheMail
*mail;
Sll
*al;
int
rc=(-1);
char
*mech=NULL,
*auth=NULL;
/*
unsigned char
*b64=NULL;
*/
char
*b64 = NULL;
int
authenticated=0;
/*
(void) fprintf(stderr,"From: %s\n",from);
(void) fprintf(stderr,"To: %s\n",to);
(void) fprintf(stderr,"Cc: %s\n",cc);
(void) fprintf(stderr,"Cc: %s\n",bcc);
(void) fprintf(stderr,"Sub: %s\n",sub);
(void) fprintf(stderr,"smtp: %s\n",smtp_server);
(void) fprintf(stderr,"smtp port: %d\n",smtp_port);
(void) fprintf(stderr,"domain: %s\n",helo_domain);
(void) fprintf(stderr,"attach file: %s\n",attach_file);
(void) fprintf(stderr,"txt_msg_file: %s\n",txt_msg_file);
(void) fprintf(stderr,"the_msg: %s\n",the_msg);
(void) fprintf(stderr,"is_mime: %d\n",is_mime);
*/
al=getAddressList();
if (al == (Sll *) NULL)
{
errorMsg("No To address/es specified");
return (-1);
}
if (from == (char *) NULL)
{
errorMsg("No From address specified");
return (-1);
}
if (smtp_server == (char *) NULL)
smtp_server="127.0.0.1";
if (smtp_port == -1)
smtp_port=MAILSEND_SMTP_PORT;
if (sub == (char *) NULL)
sub=MAILSEND_DEF_SUB;
if (helo_domain == (char *) NULL)
{
errorMsg("No domain specified");
return (-1);
}
mail=newTheMail();
if (mail == (TheMail *) NULL)
{
errorMsg("Error: malloc failed in createTheMail()\n");
return (-1);
}
showVerbose("Connecting to %s:%d\n",smtp_server,smtp_port);
/* open the network connection */
sfd=smtpConnect(smtp_server,smtp_port);
if (sfd == INVALID_SOCKET)
{
rc=(-1);
goto cleanup;
}
if (g_do_ssl) /* smtp.gmail:465 supports it for example */
{
turn_on_raw_ssl(sfd);
}
/* read greeting */
rc=read_greetings();
if (rc < 0)
goto cleanup;
/* say HELO/EHLO */
say_helo(helo_domain);
/* check if the server supports STARTTLS or TLS */
if (g_do_starttls)
{
if (check_server_cap("STARTTLS") ||
check_server_cap("TLS"))
{
rc=smtp_start_tls(sfd);
if (rc == 0)
{
/* send HELO again */
say_helo(helo_domain);
}
}
}
if (g_do_auth || g_auth_cram_md5 || g_auth_login || g_auth_plain)
{
auth=check_server_cap("AUTH");
}
if (!auth)
goto MailFrom;
/*
(void) fprintf(stderr,"auth=%s\n",auth);
(void) fprintf(stderr," g_auth_cram_md5=%d; g_auth_login=%d; g_auth_plain=%d\n", g_auth_cram_md5, g_auth_login, g_auth_plain);
*/
/*
if (auth && g_do_auth)
{
g_auth_cram_md5=1;
g_auth_login=1;
g_auth_plain=1;
}
*/
/* Try CRAM-MD5 first */
mech="CRAM-MD5";
if (g_auth_cram_md5 && check_server_cap(mech))
{
char
*cmd5 = NULL;
CHECK_USERNAME(mech);
CHECK_USERPASS(mech);
#ifndef HAVE_OPENSSL
errorMsg("Must be compiled with OpenSSL in order to get CRAM-MD5 support\n");
goto cleanup;
#endif /* !HAVE_OPENSSL */
showVerbose("Using AUTH %s\n",mech);
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"AUTH %s\r\n",mech);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 334)
{
errorMsg("AUTH CRAM-MD5 failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
cmd5 = encode_cram_md5(smtp_line,g_username,g_userpass);
if (cmd5 == NULL)
{
errorMsg("Could not encode CRAM-MD5");
rc = (-1);
goto cleanup;
}
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"%s\r\n",cmd5);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 235)
{
errorMsg("AUTH CRAM-MD5 failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
showVerbose("%s Authentication succeeded\n",mech);
authenticated++;
if (cmd5)
{
(void) free((char *) cmd5);
}
}
else
{
if (g_auth_cram_md5)
showVerbose("Server does not support AUTH CRAM-MD5\n");
}
if (authenticated)
goto MailFrom;
mech="LOGIN";
if (g_auth_login && check_server_cap(mech))
{
CHECK_USERNAME(mech);
CHECK_USERPASS(mech);
showVerbose("Using AUTH %s\n",mech);
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"AUTH %s\r\n",mech);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 334)
{
errorMsg("AUTH LOGIN failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
/*
b64=mutils_encode_base64(g_username,strlen(g_username),&b64len);
b64[b64len-2]='\0';
*/
b64=mutils_encode_base64_noformat(g_username,strlen(g_username));
if (b64 == NULL)
{
errorMsg("Could not base64 encode user: %s",g_username);
rc=(-1);
goto cleanup;
}
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"%s\r\n",b64);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 334)
{
errorMsg("AUTH LOGIN failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
/*
b64=mutils_encode_base64(g_userpass,strlen(g_userpass),&b64len);
b64[b64len-2]='\0';
*/
b64=mutils_encode_base64_noformat(g_userpass,strlen(g_userpass));
if (b64 == NULL)
{
errorMsg("Could not base64 encode passworf of user: %s",g_username);
rc=(-1);
goto cleanup;
}
memset(buf,0,sizeof(buf));
(void) snprintf(buf,sizeof(buf)-1,"%s\r\n",b64);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 235)
{
errorMsg("AUTH LOGIN failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
authenticated++;
}
else
{
if (g_auth_login)
showVerbose("Server does not support AUTH LOGIN\n");
}
if (authenticated)
goto MailFrom;
mech="PLAIN";
if (g_auth_plain && check_server_cap(mech))
{
int
len,
ulen,
plen;
unsigned char
*b64=NULL;
CHECK_USERNAME(mech);
CHECK_USERPASS(mech);
showVerbose("Using AUTH %s\n",mech);
memset(buf,0,sizeof(buf));
/*
** authzid\0authid\0pass
** authzid can be skipped if both are the same
*/
ulen=strlen(g_username);
memcpy(buf + 1,g_username,ulen);
plen=strlen(g_userpass);
memcpy(buf + ulen + 2,g_userpass,plen);
len=ulen + plen + 2;
#if 0
b64=mutils_encode_base64(buf,len,&b64len);
/* mutils_encode_base64 adds CRLF */
b64[b64len-2]='\0';
#endif
b64=mutils_encode_base64_noformat(buf,len);
if (b64 == NULL)
{
errorMsg("Could not base64 for AUTH-PLAIN for user: %s",g_username);
rc=(-1);
goto cleanup;
}
(void) snprintf(buf,sizeof(buf)-1,"AUTH PLAIN %s\r\n",(char *) b64);
showVerbose("[C] %s",buf);
msock_puts(buf);
read_smtp_line();
if (smtp_code != 235)
{
errorMsg("AUTH PLAIN failed: '%d %s'",
smtp_code,
smtp_line);
rc=(-1);
goto cleanup;
}
showVerbose("PLAIN Authentication succeeded\n");
authenticated++;
}
else
{
if (g_auth_plain)
showVerbose("Server does not support AUTH PLAIN\n");
}
if (authenticated)
goto MailFrom;
if (auth && !g_quiet)
{
if (!g_auth_cram_md5)
{
if (check_server_cap("CRAM-MD5"))
{
(void) fprintf(stderr,
" * Server supports AUTH CRAM-MD5.");
}
}
if (!g_auth_login)
{
if (check_server_cap("LOGIN"))
{
(void) fprintf(stderr,
" * Server supports AUTH LOGIN.\n");
}
}
if (!g_auth_plain)
{
if (check_server_cap("PLAIN"))
{
(void) fprintf(stderr,
" * Server supports AUTH PLAIN.\n");
}
}
if (!authenticated)
{
(void) fprintf(stderr,
" Use -auth or specify a mechanism that server supports. exiting.\n");
exit(1);
}
}
MailFrom:
rc=smtp_MAIL_FROM(from);
if (rc != 0)
goto cleanup;
rc=smtp_RCPT_TO();
if (rc != 0)
goto cleanup;
rc=smtp_DATA();
if (rc != 0)
goto cleanup;
rc=smtpMail(sfd,to,cc,bcc,from,rrr,rt,sub,attach_file,txt_msg_file,the_msg,is_mime,add_dateh);
RETURN_IF_NOT_ZERO(rc);
rc=smtpEom(sfd);
RETURN_IF_NOT_ZERO(rc);
smtp_QUIT();
cleanup:
return (rc);
}
