2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2004 Hiroyuki Yamamoto
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 static void smtp_session_destroy(Session *session);
37 static gint smtp_from(SMTPSession *session);
39 static gint smtp_auth(SMTPSession *session);
40 static gint smtp_starttls(SMTPSession *session);
41 static gint smtp_auth_cram_md5(SMTPSession *session);
42 static gint smtp_auth_login(SMTPSession *session);
44 static gint smtp_ehlo(SMTPSession *session);
45 static gint smtp_ehlo_recv(SMTPSession *session, const gchar *msg);
47 static gint smtp_helo(SMTPSession *session);
48 static gint smtp_rcpt(SMTPSession *session);
49 static gint smtp_data(SMTPSession *session);
50 static gint smtp_send_data(SMTPSession *session);
51 /* static gint smtp_rset(SMTPSession *session); */
52 static gint smtp_quit(SMTPSession *session);
53 static gint smtp_eom(SMTPSession *session);
55 static gint smtp_session_recv_msg(Session *session, const gchar *msg);
56 static gint smtp_session_send_data_finished(Session *session, guint len);
59 Session *smtp_session_new(void)
63 session = g_new0(SMTPSession, 1);
65 session_init(SESSION(session));
67 SESSION(session)->type = SESSION_SMTP;
69 SESSION(session)->recv_msg = smtp_session_recv_msg;
71 SESSION(session)->recv_data_finished = NULL;
72 SESSION(session)->send_data_finished = smtp_session_send_data_finished;
74 SESSION(session)->destroy = smtp_session_destroy;
76 session->state = SMTP_READY;
79 session->tls_init_done = FALSE;
82 session->hostname = NULL;
87 session->to_list = NULL;
88 session->cur_to = NULL;
90 session->send_data = NULL;
91 session->send_data_len = 0;
93 session->max_message_size = -1;
95 session->avail_auth_type = 0;
96 session->forced_auth_type = 0;
97 session->auth_type = 0;
99 session->error_val = SM_OK;
100 session->error_msg = NULL;
102 return SESSION(session);
105 static void smtp_session_destroy(Session *session)
107 SMTPSession *smtp_session = SMTP_SESSION(session);
109 g_free(smtp_session->hostname);
110 g_free(smtp_session->user);
111 g_free(smtp_session->pass);
112 g_free(smtp_session->from);
114 g_free(smtp_session->send_data);
116 g_free(smtp_session->error_msg);
119 static gint smtp_from(SMTPSession *session)
121 gchar buf[MSGBUFSIZE];
123 g_return_val_if_fail(session->from != NULL, SM_ERROR);
125 session->state = SMTP_FROM;
127 if (strchr(session->from, '<'))
128 g_snprintf(buf, sizeof(buf), "MAIL FROM:%s", session->from);
130 g_snprintf(buf, sizeof(buf), "MAIL FROM:<%s>", session->from);
132 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
133 log_print("SMTP> %s\n", buf);
138 static gint smtp_auth(SMTPSession *session)
141 g_return_val_if_fail(session->user != NULL, SM_ERROR);
143 session->state = SMTP_AUTH;
145 if (session->forced_auth_type == SMTPAUTH_CRAM_MD5 ||
146 (session->forced_auth_type == 0 &&
147 (session->avail_auth_type & SMTPAUTH_CRAM_MD5) != 0))
148 smtp_auth_cram_md5(session);
149 else if (session->forced_auth_type == SMTPAUTH_LOGIN ||
150 (session->forced_auth_type == 0 &&
151 (session->avail_auth_type & SMTPAUTH_LOGIN) != 0))
152 smtp_auth_login(session);
154 log_warning(_("SMTP AUTH not available\n"));
161 static gint smtp_auth_recv(SMTPSession *session, const gchar *msg)
163 gchar buf[MSGBUFSIZE];
165 switch (session->auth_type) {
167 session->state = SMTP_AUTH_LOGIN_USER;
169 if (!strncmp(msg, "334 ", 4)) {
170 base64_encode(buf, session->user, strlen(session->user));
172 session_send_msg(SESSION(session), SESSION_MSG_NORMAL,
174 log_print("ESMTP> [USERID]\n");
176 /* Server rejects AUTH */
177 session_send_msg(SESSION(session), SESSION_MSG_NORMAL,
179 log_print("ESMTP> *\n");
182 case SMTPAUTH_CRAM_MD5:
183 session->state = SMTP_AUTH_CRAM_MD5;
185 if (!strncmp(msg, "334 ", 4)) {
190 guchar hexdigest[33];
192 challenge = g_malloc(strlen(msg + 4) + 1);
193 challengelen = base64_decode(challenge, msg + 4, -1);
194 challenge[challengelen] = '\0';
195 log_print("ESMTP< [Decoded: %s]\n", challenge);
197 g_snprintf(buf, sizeof(buf), "%s", session->pass);
198 md5_hex_hmac(hexdigest, challenge, challengelen,
199 buf, strlen(session->pass));
202 response = g_strdup_printf
203 ("%s %s", session->user, hexdigest);
204 log_print("ESMTP> [Encoded: %s]\n", response);
206 response64 = g_malloc((strlen(response) + 3) * 2 + 1);
207 base64_encode(response64, response, strlen(response));
210 session_send_msg(SESSION(session), SESSION_MSG_NORMAL,
212 log_print("ESMTP> %s\n", response64);
215 /* Server rejects AUTH */
216 session_send_msg(SESSION(session), SESSION_MSG_NORMAL,
218 log_print("ESMTP> *\n");
221 case SMTPAUTH_DIGEST_MD5:
223 /* stop smtp_auth when no correct authtype */
224 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "*");
225 log_print("ESMTP> *\n");
232 static gint smtp_auth_login_user_recv(SMTPSession *session, const gchar *msg)
234 gchar buf[MSGBUFSIZE];
236 session->state = SMTP_AUTH_LOGIN_PASS;
238 if (!strncmp(msg, "334 ", 4))
239 base64_encode(buf, session->pass, strlen(session->pass));
241 /* Server rejects AUTH */
242 g_snprintf(buf, sizeof(buf), "*");
244 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
245 log_print("ESMTP> [PASSWORD]\n");
250 static gint smtp_ehlo(SMTPSession *session)
252 gchar buf[MSGBUFSIZE];
254 session->state = SMTP_EHLO;
256 session->avail_auth_type = 0;
258 g_snprintf(buf, sizeof(buf), "EHLO %s",
259 session->hostname ? session->hostname : get_domain_name());
260 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
261 log_print("ESMTP> %s\n", buf);
266 static gint smtp_ehlo_recv(SMTPSession *session, const gchar *msg)
268 if (strncmp(msg, "250", 3) == 0) {
269 const gchar *p = msg;
271 if (*p == '-' || *p == ' ') p++;
272 if (g_ascii_strncasecmp(p, "AUTH", 4) == 0) {
274 if (strcasestr(p, "LOGIN"))
275 session->avail_auth_type |= SMTPAUTH_LOGIN;
276 if (strcasestr(p, "CRAM-MD5"))
277 session->avail_auth_type |= SMTPAUTH_CRAM_MD5;
278 if (strcasestr(p, "DIGEST-MD5"))
279 session->avail_auth_type |= SMTPAUTH_DIGEST_MD5;
281 if (g_ascii_strncasecmp(p, "SIZE", 4) == 0) {
283 session->max_message_size = atoi(p);
286 } else if ((msg[0] == '1' || msg[0] == '2' || msg[0] == '3') &&
287 (msg[3] == ' ' || msg[3] == '\0'))
289 else if (msg[0] == '5' && msg[1] == '0' &&
290 (msg[2] == '4' || msg[2] == '3' || msg[2] == '1'))
296 static gint smtp_starttls(SMTPSession *session)
298 session->state = SMTP_STARTTLS;
300 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "STARTTLS");
301 log_print("ESMTP> STARTTLS\n");
306 static gint smtp_auth_cram_md5(SMTPSession *session)
308 session->state = SMTP_AUTH;
309 session->auth_type = SMTPAUTH_CRAM_MD5;
311 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "AUTH CRAM-MD5");
312 log_print("ESMTP> AUTH CRAM-MD5\n");
317 static gint smtp_auth_login(SMTPSession *session)
319 session->state = SMTP_AUTH;
320 session->auth_type = SMTPAUTH_LOGIN;
322 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "AUTH LOGIN");
323 log_print("ESMTP> AUTH LOGIN\n");
328 static gint smtp_helo(SMTPSession *session)
330 gchar buf[MSGBUFSIZE];
332 session->state = SMTP_HELO;
334 g_snprintf(buf, sizeof(buf), "HELO %s",
335 session->hostname ? session->hostname : get_domain_name());
336 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
337 log_print("SMTP> %s\n", buf);
342 static gint smtp_rcpt(SMTPSession *session)
344 gchar buf[MSGBUFSIZE];
347 g_return_val_if_fail(session->cur_to != NULL, SM_ERROR);
349 session->state = SMTP_RCPT;
351 to = (gchar *)session->cur_to->data;
354 g_snprintf(buf, sizeof(buf), "RCPT TO:%s", to);
356 g_snprintf(buf, sizeof(buf), "RCPT TO:<%s>", to);
357 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
358 log_print("SMTP> %s\n", buf);
360 session->cur_to = session->cur_to->next;
365 static gint smtp_data(SMTPSession *session)
367 session->state = SMTP_DATA;
369 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "DATA");
370 log_print("SMTP> DATA\n");
375 static gint smtp_send_data(SMTPSession *session)
377 session->state = SMTP_SEND_DATA;
379 session_send_data(SESSION(session), session->send_data,
380 session->send_data_len);
386 static gint smtp_rset(SMTPSession *session)
388 session->state = SMTP_RSET;
390 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "RSET");
391 log_print("SMTP> RSET\n");
397 static gint smtp_quit(SMTPSession *session)
399 session->state = SMTP_QUIT;
401 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, "QUIT");
402 log_print("SMTP> QUIT\n");
407 static gint smtp_eom(SMTPSession *session)
409 session->state = SMTP_EOM;
411 session_send_msg(SESSION(session), SESSION_MSG_NORMAL, ".");
412 log_print("SMTP> . (EOM)\n");
417 static gint smtp_session_recv_msg(Session *session, const gchar *msg)
419 SMTPSession *smtp_session = SMTP_SESSION(session);
420 gboolean cont = FALSE;
422 if (strlen(msg) < 4) {
423 log_warning(_("bad SMTP response\n"));
427 switch (smtp_session->state) {
431 case SMTP_AUTH_LOGIN_USER:
432 case SMTP_AUTH_LOGIN_PASS:
433 case SMTP_AUTH_CRAM_MD5:
434 log_print("ESMTP< %s\n", msg);
437 log_print("SMTP< %s\n", msg);
441 if (msg[0] == '5' && msg[1] == '0' &&
442 (msg[2] == '4' || msg[2] == '3' || msg[2] == '1')) {
443 log_warning(_("error occurred on SMTP session\n"));
444 smtp_session->state = SMTP_ERROR;
445 smtp_session->error_val = SM_ERROR;
446 g_free(smtp_session->error_msg);
447 smtp_session->error_msg = g_strdup(msg);
451 if (!strncmp(msg, "535", 3)) {
452 log_warning(_("error occurred on authentication\n"));
453 smtp_session->state = SMTP_ERROR;
454 smtp_session->error_val = SM_AUTHFAIL;
455 g_free(smtp_session->error_msg);
456 smtp_session->error_msg = g_strdup(msg);
460 if (msg[0] != '1' && msg[0] != '2' && msg[0] != '3') {
461 log_warning(_("error occurred on SMTP session\n"));
462 smtp_session->state = SMTP_ERROR;
463 smtp_session->error_val = SM_ERROR;
464 g_free(smtp_session->error_msg);
465 smtp_session->error_msg = g_strdup(msg);
471 else if (msg[3] != ' ' && msg[3] != '\0') {
472 log_warning(_("bad SMTP response\n"));
473 smtp_session->state = SMTP_ERROR;
474 smtp_session->error_val = SM_UNRECOVERABLE;
478 /* ignore all multiline responses except for EHLO */
479 if (cont && smtp_session->state != SMTP_EHLO)
480 return session_recv_msg(session);
482 switch (smtp_session->state) {
486 if (smtp_session->user || session->ssl_type != SSL_NONE)
488 if (smtp_session->user)
490 smtp_ehlo(smtp_session);
492 smtp_helo(smtp_session);
495 smtp_from(smtp_session);
498 smtp_ehlo_recv(smtp_session, msg);
501 if (smtp_session->max_message_size > 0
502 && smtp_session->max_message_size <
503 smtp_session->send_data_len) {
504 log_warning(_("Message is too big "
505 "(Maximum size is %s)\n"),
507 (off_t)(smtp_session->max_message_size)));
508 smtp_session->state = SMTP_ERROR;
509 smtp_session->error_val = SM_ERROR;
513 if (session->ssl_type == SSL_STARTTLS &&
514 smtp_session->tls_init_done == FALSE) {
515 smtp_starttls(smtp_session);
519 if (smtp_session->user) {
520 if (smtp_auth(smtp_session) != SM_OK)
521 smtp_from(smtp_session);
523 smtp_from(smtp_session);
527 if (session_start_tls(session) < 0) {
528 log_warning(_("can't start TLS session\n"));
529 smtp_session->state = SMTP_ERROR;
530 smtp_session->error_val = SM_ERROR;
533 smtp_session->tls_init_done = TRUE;
534 smtp_ehlo(smtp_session);
538 smtp_auth_recv(smtp_session, msg);
540 case SMTP_AUTH_LOGIN_USER:
541 smtp_auth_login_user_recv(smtp_session, msg);
543 case SMTP_AUTH_LOGIN_PASS:
544 case SMTP_AUTH_CRAM_MD5:
545 smtp_from(smtp_session);
548 if (smtp_session->cur_to)
549 smtp_rcpt(smtp_session);
552 if (smtp_session->cur_to)
553 smtp_rcpt(smtp_session);
555 smtp_data(smtp_session);
558 smtp_send_data(smtp_session);
561 smtp_quit(smtp_session);
564 session_disconnect(session);
568 log_warning(_("error occurred on SMTP session\n"));
569 smtp_session->error_val = SM_ERROR;
574 return session_recv_msg(session);
579 static gint smtp_session_send_data_finished(Session *session, guint len)
581 smtp_eom(SMTP_SESSION(session));