mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
b4eb08e7fb
Small tidy up to keep some comments consistant across each of the email protocols.
1734 lines
48 KiB
C
1734 lines
48 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at http://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* RFC1870 SMTP Service Extension for Message Size
|
|
* RFC2195 CRAM-MD5 authentication
|
|
* RFC2831 DIGEST-MD5 authentication
|
|
* RFC3207 SMTP over TLS
|
|
* RFC4422 Simple Authentication and Security Layer (SASL)
|
|
* RFC4616 PLAIN authentication
|
|
* RFC4954 SMTP Authentication
|
|
* RFC5321 SMTP protocol
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#ifndef CURL_DISABLE_SMTP
|
|
|
|
#ifdef HAVE_NETINET_IN_H
|
|
#include <netinet/in.h>
|
|
#endif
|
|
#ifdef HAVE_ARPA_INET_H
|
|
#include <arpa/inet.h>
|
|
#endif
|
|
#ifdef HAVE_UTSNAME_H
|
|
#include <sys/utsname.h>
|
|
#endif
|
|
#ifdef HAVE_NETDB_H
|
|
#include <netdb.h>
|
|
#endif
|
|
#ifdef __VMS
|
|
#include <in.h>
|
|
#include <inet.h>
|
|
#endif
|
|
|
|
#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
|
|
#undef in_addr_t
|
|
#define in_addr_t unsigned long
|
|
#endif
|
|
|
|
#include <curl/curl.h>
|
|
#include "urldata.h"
|
|
#include "sendf.h"
|
|
#include "if2ip.h"
|
|
#include "hostip.h"
|
|
#include "progress.h"
|
|
#include "transfer.h"
|
|
#include "escape.h"
|
|
#include "http.h" /* for HTTP proxy tunnel stuff */
|
|
#include "socks.h"
|
|
#include "smtp.h"
|
|
|
|
#include "strtoofft.h"
|
|
#include "strequal.h"
|
|
#include "sslgen.h"
|
|
#include "connect.h"
|
|
#include "strerror.h"
|
|
#include "select.h"
|
|
#include "multiif.h"
|
|
#include "url.h"
|
|
#include "rawstr.h"
|
|
#include "curl_gethostname.h"
|
|
#include "curl_sasl.h"
|
|
#include "warnless.h"
|
|
|
|
#define _MPRINTF_REPLACE /* use our functions only */
|
|
#include <curl/mprintf.h>
|
|
|
|
#include "curl_memory.h"
|
|
/* The last #include file should be: */
|
|
#include "memdebug.h"
|
|
|
|
/* Local API functions */
|
|
static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
|
|
static CURLcode smtp_do(struct connectdata *conn, bool *done);
|
|
static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
|
|
bool premature);
|
|
static CURLcode smtp_connect(struct connectdata *conn, bool *done);
|
|
static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
|
|
static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
|
|
static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
|
int numsocks);
|
|
static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
|
|
static CURLcode smtp_setup_connection(struct connectdata *conn);
|
|
|
|
/*
|
|
* SMTP protocol handler.
|
|
*/
|
|
|
|
const struct Curl_handler Curl_handler_smtp = {
|
|
"SMTP", /* scheme */
|
|
smtp_setup_connection, /* setup_connection */
|
|
smtp_do, /* do_it */
|
|
smtp_done, /* done */
|
|
ZERO_NULL, /* do_more */
|
|
smtp_connect, /* connect_it */
|
|
smtp_multi_statemach, /* connecting */
|
|
smtp_doing, /* doing */
|
|
smtp_getsock, /* proto_getsock */
|
|
smtp_getsock, /* doing_getsock */
|
|
ZERO_NULL, /* domore_getsock */
|
|
ZERO_NULL, /* perform_getsock */
|
|
smtp_disconnect, /* disconnect */
|
|
ZERO_NULL, /* readwrite */
|
|
PORT_SMTP, /* defport */
|
|
CURLPROTO_SMTP, /* protocol */
|
|
PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY /* flags */
|
|
};
|
|
|
|
#ifdef USE_SSL
|
|
/*
|
|
* SMTPS protocol handler.
|
|
*/
|
|
|
|
const struct Curl_handler Curl_handler_smtps = {
|
|
"SMTPS", /* scheme */
|
|
smtp_setup_connection, /* setup_connection */
|
|
smtp_do, /* do_it */
|
|
smtp_done, /* done */
|
|
ZERO_NULL, /* do_more */
|
|
smtp_connect, /* connect_it */
|
|
smtp_multi_statemach, /* connecting */
|
|
smtp_doing, /* doing */
|
|
smtp_getsock, /* proto_getsock */
|
|
smtp_getsock, /* doing_getsock */
|
|
ZERO_NULL, /* domore_getsock */
|
|
ZERO_NULL, /* perform_getsock */
|
|
smtp_disconnect, /* disconnect */
|
|
ZERO_NULL, /* readwrite */
|
|
PORT_SMTPS, /* defport */
|
|
CURLPROTO_SMTP | CURLPROTO_SMTPS, /* protocol */
|
|
PROTOPT_CLOSEACTION | PROTOPT_SSL
|
|
| PROTOPT_NOURLQUERY /* flags */
|
|
};
|
|
#endif
|
|
|
|
#ifndef CURL_DISABLE_HTTP
|
|
/*
|
|
* HTTP-proxyed SMTP protocol handler.
|
|
*/
|
|
|
|
static const struct Curl_handler Curl_handler_smtp_proxy = {
|
|
"SMTP", /* scheme */
|
|
ZERO_NULL, /* setup_connection */
|
|
Curl_http, /* do_it */
|
|
Curl_http_done, /* done */
|
|
ZERO_NULL, /* do_more */
|
|
ZERO_NULL, /* connect_it */
|
|
ZERO_NULL, /* connecting */
|
|
ZERO_NULL, /* doing */
|
|
ZERO_NULL, /* proto_getsock */
|
|
ZERO_NULL, /* doing_getsock */
|
|
ZERO_NULL, /* domore_getsock */
|
|
ZERO_NULL, /* perform_getsock */
|
|
ZERO_NULL, /* disconnect */
|
|
ZERO_NULL, /* readwrite */
|
|
PORT_SMTP, /* defport */
|
|
CURLPROTO_HTTP, /* protocol */
|
|
PROTOPT_NONE /* flags */
|
|
};
|
|
|
|
#ifdef USE_SSL
|
|
/*
|
|
* HTTP-proxyed SMTPS protocol handler.
|
|
*/
|
|
|
|
static const struct Curl_handler Curl_handler_smtps_proxy = {
|
|
"SMTPS", /* scheme */
|
|
ZERO_NULL, /* setup_connection */
|
|
Curl_http, /* do_it */
|
|
Curl_http_done, /* done */
|
|
ZERO_NULL, /* do_more */
|
|
ZERO_NULL, /* connect_it */
|
|
ZERO_NULL, /* connecting */
|
|
ZERO_NULL, /* doing */
|
|
ZERO_NULL, /* proto_getsock */
|
|
ZERO_NULL, /* doing_getsock */
|
|
ZERO_NULL, /* domore_getsock */
|
|
ZERO_NULL, /* perform_getsock */
|
|
ZERO_NULL, /* disconnect */
|
|
ZERO_NULL, /* readwrite */
|
|
PORT_SMTPS, /* defport */
|
|
CURLPROTO_HTTP, /* protocol */
|
|
PROTOPT_NONE /* flags */
|
|
};
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef USE_SSL
|
|
static void smtp_to_smtps(struct connectdata *conn)
|
|
{
|
|
conn->handler = &Curl_handler_smtps;
|
|
}
|
|
#else
|
|
#define smtp_to_smtps(x) Curl_nop_stmt
|
|
#endif
|
|
|
|
/* Function that checks for an ending SMTP status code at the start of the
|
|
given string, but also detects various capabilities from the EHLO response
|
|
including the supported authentication mechanisms. */
|
|
static bool smtp_endofresp(struct connectdata *conn, char *line, size_t len,
|
|
int *resp)
|
|
{
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
bool result = FALSE;
|
|
size_t wordlen;
|
|
|
|
if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
|
|
return FALSE; /* Nothing for us */
|
|
|
|
/* Do we have a command response? */
|
|
result = (line[3] == ' ') ? TRUE : FALSE;
|
|
if(result)
|
|
*resp = curlx_sltosi(strtol(line, NULL, 10));
|
|
|
|
/* Are we processing EHLO command data? */
|
|
if(smtpc->state == SMTP_EHLO && (!result || (result && *resp/100 == 2))) {
|
|
line += 4;
|
|
len -= 4;
|
|
|
|
/* Does the server support the STARTTLS capability? */
|
|
if(len >= 8 && !memcmp(line, "STARTTLS", 8))
|
|
smtpc->tls_supported = TRUE;
|
|
|
|
/* Does the server support the SIZE capability? */
|
|
else if(len >= 4 && !memcmp(line, "SIZE", 4))
|
|
smtpc->size_supported = TRUE;
|
|
|
|
/* Do we have the authentication mechanism list? */
|
|
else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
|
|
line += 5;
|
|
len -= 5;
|
|
|
|
/* Loop through the data line */
|
|
for(;;) {
|
|
while(len &&
|
|
(*line == ' ' || *line == '\t' ||
|
|
*line == '\r' || *line == '\n')) {
|
|
|
|
line++;
|
|
len--;
|
|
}
|
|
|
|
if(!len)
|
|
break;
|
|
|
|
/* Extract the word */
|
|
for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
|
|
line[wordlen] != '\t' && line[wordlen] != '\r' &&
|
|
line[wordlen] != '\n';)
|
|
wordlen++;
|
|
|
|
/* Test the word for a matching authentication mechanism */
|
|
if(wordlen == 5 && !memcmp(line, "LOGIN", 5))
|
|
smtpc->authmechs |= SASL_MECH_LOGIN;
|
|
else if(wordlen == 5 && !memcmp(line, "PLAIN", 5))
|
|
smtpc->authmechs |= SASL_MECH_PLAIN;
|
|
else if(wordlen == 8 && !memcmp(line, "CRAM-MD5", 8))
|
|
smtpc->authmechs |= SASL_MECH_CRAM_MD5;
|
|
else if(wordlen == 10 && !memcmp(line, "DIGEST-MD5", 10))
|
|
smtpc->authmechs |= SASL_MECH_DIGEST_MD5;
|
|
else if(wordlen == 6 && !memcmp(line, "GSSAPI", 6))
|
|
smtpc->authmechs |= SASL_MECH_GSSAPI;
|
|
else if(wordlen == 8 && !memcmp(line, "EXTERNAL", 8))
|
|
smtpc->authmechs |= SASL_MECH_EXTERNAL;
|
|
else if(wordlen == 4 && !memcmp(line, "NTLM", 4))
|
|
smtpc->authmechs |= SASL_MECH_NTLM;
|
|
|
|
line += wordlen;
|
|
len -= wordlen;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* This is the ONLY way to change SMTP state! */
|
|
static void state(struct connectdata *conn, smtpstate newstate)
|
|
{
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
/* for debug purposes */
|
|
static const char * const names[] = {
|
|
"STOP",
|
|
"SERVERGREET",
|
|
"EHLO",
|
|
"HELO",
|
|
"STARTTLS",
|
|
"UPGRADETLS",
|
|
"AUTH_PLAIN",
|
|
"AUTH_LOGIN",
|
|
"AUTH_LOGIN_PASSWD",
|
|
"AUTH_CRAMMD5",
|
|
"AUTH_DIGESTMD5",
|
|
"AUTH_DIGESTMD5_RESP",
|
|
"AUTH_NTLM",
|
|
"AUTH_NTLM_TYPE2MSG",
|
|
"AUTH_FINAL",
|
|
"MAIL",
|
|
"RCPT",
|
|
"DATA",
|
|
"POSTDATA",
|
|
"QUIT",
|
|
/* LAST */
|
|
};
|
|
|
|
if(smtpc->state != newstate)
|
|
infof(conn->data, "SMTP %p state change from %s to %s\n",
|
|
smtpc, names[smtpc->state], names[newstate]);
|
|
#endif
|
|
|
|
smtpc->state = newstate;
|
|
}
|
|
|
|
static CURLcode smtp_state_ehlo(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
smtpc->authmechs = 0; /* No known authentication mechanisms yet */
|
|
smtpc->authused = 0; /* Clear the authentication mechanism used
|
|
for esmtp connections */
|
|
smtpc->tls_supported = FALSE; /* Clear the TLS capability */
|
|
|
|
/* Send the EHLO command */
|
|
result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, SMTP_EHLO);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode smtp_state_helo(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
smtpc->authused = 0; /* No authentication mechanism used in smtp
|
|
connections */
|
|
|
|
/* Send the HELO command */
|
|
result = Curl_pp_sendf(&smtpc->pp, "HELO %s", smtpc->domain);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, SMTP_HELO);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode smtp_state_starttls(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* Send the STARTTLS command */
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "STARTTLS");
|
|
|
|
if(!result)
|
|
state(conn, SMTP_STARTTLS);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_state_upgrade_tls(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
/* Start the SSL connection */
|
|
result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
|
|
|
|
if(!result) {
|
|
if(smtpc->state != SMTP_UPGRADETLS)
|
|
state(conn, SMTP_UPGRADETLS);
|
|
|
|
if(smtpc->ssldone) {
|
|
smtp_to_smtps(conn);
|
|
result = smtp_state_ehlo(conn);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_authenticate(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
const char *mech = NULL;
|
|
char *initresp = NULL;
|
|
size_t len = 0;
|
|
smtpstate state1 = SMTP_STOP;
|
|
smtpstate state2 = SMTP_STOP;
|
|
|
|
/* Check we have a username and password to authenticate with and end the
|
|
connect phase if we don't */
|
|
if(!conn->bits.user_passwd) {
|
|
state(conn, SMTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Calculate the supported authentication mechanism, by decreasing order of
|
|
security, as well as the initial response where appropriate */
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
if(smtpc->authmechs & SASL_MECH_DIGEST_MD5) {
|
|
mech = "DIGEST-MD5";
|
|
state1 = SMTP_AUTH_DIGESTMD5;
|
|
smtpc->authused = SASL_MECH_DIGEST_MD5;
|
|
}
|
|
else if(smtpc->authmechs & SASL_MECH_CRAM_MD5) {
|
|
mech = "CRAM-MD5";
|
|
state1 = SMTP_AUTH_CRAMMD5;
|
|
smtpc->authused = SASL_MECH_CRAM_MD5;
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef USE_NTLM
|
|
if(smtpc->authmechs & SASL_MECH_NTLM) {
|
|
mech = "NTLM";
|
|
state1 = SMTP_AUTH_NTLM;
|
|
state2 = SMTP_AUTH_NTLM_TYPE2MSG;
|
|
smtpc->authused = SASL_MECH_NTLM;
|
|
result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
|
|
&conn->ntlm,
|
|
&initresp, &len);
|
|
}
|
|
else
|
|
#endif
|
|
if(smtpc->authmechs & SASL_MECH_LOGIN) {
|
|
mech = "LOGIN";
|
|
state1 = SMTP_AUTH_LOGIN;
|
|
state2 = SMTP_AUTH_LOGIN_PASSWD;
|
|
smtpc->authused = SASL_MECH_LOGIN;
|
|
result = Curl_sasl_create_login_message(conn->data, conn->user,
|
|
&initresp, &len);
|
|
}
|
|
else if(smtpc->authmechs & SASL_MECH_PLAIN) {
|
|
mech = "PLAIN";
|
|
state1 = SMTP_AUTH_PLAIN;
|
|
state2 = SMTP_AUTH_FINAL;
|
|
smtpc->authused = SASL_MECH_PLAIN;
|
|
result = Curl_sasl_create_plain_message(conn->data, conn->user,
|
|
conn->passwd, &initresp, &len);
|
|
}
|
|
else {
|
|
/* Other mechanisms not supported */
|
|
infof(conn->data, "No known authentication mechanisms supported!\n");
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
if(!result) {
|
|
/* Perform SASL based authentication */
|
|
if(initresp &&
|
|
strlen(mech) + len <= 512 - 8) { /* AUTH <mech> ...<crlf> */
|
|
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
|
|
|
|
if(!result)
|
|
state(conn, state2);
|
|
}
|
|
else {
|
|
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
|
|
|
|
if(!result)
|
|
state(conn, state1);
|
|
}
|
|
|
|
Curl_safefree(initresp);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For the initial server greeting */
|
|
static CURLcode smtp_state_servergreet_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode/100 != 2) {
|
|
failf(data, "Got unexpected smtp-server response: %d", smtpcode);
|
|
return CURLE_FTP_WEIRD_SERVER_REPLY;
|
|
}
|
|
|
|
result = smtp_state_ehlo(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For STARTTLS responses */
|
|
static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 220) {
|
|
if(data->set.use_ssl != CURLUSESSL_TRY) {
|
|
failf(data, "STARTTLS denied. %c", smtpcode);
|
|
result = CURLE_USE_SSL_FAILED;
|
|
}
|
|
else
|
|
result = smtp_authenticate(conn);
|
|
}
|
|
else
|
|
result = smtp_state_upgrade_tls(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For EHLO responses */
|
|
static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode/100 != 2) {
|
|
if((data->set.use_ssl <= CURLUSESSL_TRY || conn->ssl[FIRSTSOCKET].use) &&
|
|
!conn->bits.user_passwd)
|
|
result = smtp_state_helo(conn);
|
|
else {
|
|
failf(data, "Remote access denied: %d", smtpcode);
|
|
result = CURLE_REMOTE_ACCESS_DENIED;
|
|
}
|
|
}
|
|
else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
|
/* We don't have a SSL/TLS connection yet, but SSL is requested */
|
|
if(smtpc->tls_supported)
|
|
/* Switch to TLS connection now */
|
|
result = smtp_state_starttls(conn);
|
|
else if(data->set.use_ssl == CURLUSESSL_TRY)
|
|
/* Fallback and carry on with authentication */
|
|
result = smtp_authenticate(conn);
|
|
else {
|
|
failf(data, "STARTTLS not supported.");
|
|
result = CURLE_USE_SSL_FAILED;
|
|
}
|
|
}
|
|
else
|
|
result = smtp_authenticate(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For HELO responses */
|
|
static CURLcode smtp_state_helo_resp(struct connectdata *conn, int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode/100 != 2) {
|
|
failf(data, "Remote access denied: %d", smtpcode);
|
|
result = CURLE_REMOTE_ACCESS_DENIED;
|
|
}
|
|
else
|
|
/* End of connect phase */
|
|
state(conn, SMTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH PLAIN (without initial response) responses */
|
|
static CURLcode smtp_state_auth_plain_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
size_t len = 0;
|
|
char *plainauth = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the authorisation message */
|
|
result = Curl_sasl_create_plain_message(conn->data, conn->user,
|
|
conn->passwd, &plainauth, &len);
|
|
|
|
/* Send the message */
|
|
if(!result) {
|
|
if(plainauth) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", plainauth);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_FINAL);
|
|
}
|
|
|
|
Curl_safefree(plainauth);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH LOGIN (without initial response) responses */
|
|
static CURLcode smtp_state_auth_login_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
size_t len = 0;
|
|
char *authuser = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the user message */
|
|
result = Curl_sasl_create_login_message(conn->data, conn->user,
|
|
&authuser, &len);
|
|
|
|
/* Send the user */
|
|
if(!result) {
|
|
if(authuser) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authuser);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_LOGIN_PASSWD);
|
|
}
|
|
|
|
Curl_safefree(authuser);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH LOGIN user entry responses */
|
|
static CURLcode smtp_state_auth_login_password_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
size_t len = 0;
|
|
char *authpasswd = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the password message */
|
|
result = Curl_sasl_create_login_message(conn->data, conn->passwd,
|
|
&authpasswd, &len);
|
|
|
|
/* Send the password */
|
|
if(!result) {
|
|
if(authpasswd) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authpasswd);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_FINAL);
|
|
}
|
|
|
|
Curl_safefree(authpasswd);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
/* For AUTH CRAM-MD5 responses */
|
|
static CURLcode smtp_state_auth_cram_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
char *chlg64 = data->state.buffer;
|
|
size_t len = 0;
|
|
char *rplyb64 = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
return CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* Get the challenge */
|
|
for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
|
|
;
|
|
|
|
/* Terminate the challenge */
|
|
if(*chlg64 != '=') {
|
|
for(len = strlen(chlg64); len--;)
|
|
if(chlg64[len] != '\r' && chlg64[len] != '\n' && chlg64[len] != ' ' &&
|
|
chlg64[len] != '\t')
|
|
break;
|
|
|
|
if(++len) {
|
|
chlg64[len] = '\0';
|
|
}
|
|
}
|
|
|
|
/* Create the response message */
|
|
result = Curl_sasl_create_cram_md5_message(data, chlg64, conn->user,
|
|
conn->passwd, &rplyb64, &len);
|
|
|
|
/* Send the response */
|
|
if(!result) {
|
|
if(rplyb64) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", rplyb64);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_FINAL);
|
|
}
|
|
|
|
Curl_safefree(rplyb64);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH DIGEST-MD5 challenge responses */
|
|
static CURLcode smtp_state_auth_digest_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
char *chlg64 = data->state.buffer;
|
|
size_t len = 0;
|
|
char *rplyb64 = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
return CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* Get the challenge */
|
|
for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
|
|
;
|
|
|
|
/* Create the response message */
|
|
result = Curl_sasl_create_digest_md5_message(data, chlg64, conn->user,
|
|
conn->passwd, "smtp",
|
|
&rplyb64, &len);
|
|
|
|
/* Send the response */
|
|
if(!result) {
|
|
if(rplyb64) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", rplyb64);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_DIGESTMD5_RESP);
|
|
}
|
|
|
|
Curl_safefree(rplyb64);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH DIGEST-MD5 challenge-response responses */
|
|
static CURLcode smtp_state_auth_digest_resp_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Authentication failed: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Send an empty response */
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "");
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_FINAL);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef USE_NTLM
|
|
/* For AUTH NTLM (without initial response) responses */
|
|
static CURLcode smtp_state_auth_ntlm_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
char *type1msg = NULL;
|
|
size_t len = 0;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the type-1 message */
|
|
result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
|
|
&conn->ntlm,
|
|
&type1msg, &len);
|
|
|
|
/* Send the message */
|
|
if(!result) {
|
|
if(type1msg) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", type1msg);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_NTLM_TYPE2MSG);
|
|
}
|
|
|
|
Curl_safefree(type1msg);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For NTLM type-2 responses (sent in reponse to our type-1 message) */
|
|
static CURLcode smtp_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
char *type3msg = NULL;
|
|
size_t len = 0;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 334) {
|
|
failf(data, "Access denied: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the type-3 message */
|
|
result = Curl_sasl_create_ntlm_type3_message(data,
|
|
data->state.buffer + 4,
|
|
conn->user, conn->passwd,
|
|
&conn->ntlm,
|
|
&type3msg, &len);
|
|
|
|
/* Send the message */
|
|
if(!result) {
|
|
if(type3msg) {
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", type3msg);
|
|
|
|
if(!result)
|
|
state(conn, SMTP_AUTH_FINAL);
|
|
}
|
|
|
|
Curl_safefree(type3msg);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
/* For the final responses to the AUTH sequence */
|
|
static CURLcode smtp_state_auth_final_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 235) {
|
|
failf(data, "Authentication failed: %d", smtpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else
|
|
/* End of connect phase */
|
|
state(conn, SMTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Start the DO phase */
|
|
static CURLcode smtp_mail(struct connectdata *conn)
|
|
{
|
|
char *from = NULL;
|
|
char *auth = NULL;
|
|
char *size = NULL;
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
/* Calculate the FROM parameter */
|
|
if(!data->set.str[STRING_MAIL_FROM])
|
|
/* Null reverse-path, RFC-2821, sect. 3.7 */
|
|
from = strdup("<>");
|
|
else if(data->set.str[STRING_MAIL_FROM][0] == '<')
|
|
from = aprintf("%s", data->set.str[STRING_MAIL_FROM]);
|
|
else
|
|
from = aprintf("<%s>", data->set.str[STRING_MAIL_FROM]);
|
|
|
|
if(!from)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* Calculate the optional AUTH parameter */
|
|
if(data->set.str[STRING_MAIL_AUTH] && conn->proto.smtpc.authused) {
|
|
if(data->set.str[STRING_MAIL_AUTH][0] != '\0')
|
|
auth = aprintf("%s", data->set.str[STRING_MAIL_AUTH]);
|
|
else
|
|
/* Empty AUTH, RFC-2554, sect. 5 */
|
|
auth = strdup("<>");
|
|
|
|
if(!auth) {
|
|
Curl_safefree(from);
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
/* calculate the optional SIZE parameter */
|
|
if(conn->proto.smtpc.size_supported && conn->data->set.infilesize > 0) {
|
|
size = aprintf("%" FORMAT_OFF_T, data->set.infilesize);
|
|
|
|
if(!size) {
|
|
Curl_safefree(from);
|
|
Curl_safefree(auth);
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
/* Send the MAIL command */
|
|
if(!auth && !size)
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
|
"MAIL FROM:%s", from);
|
|
else if(auth && !size)
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
|
"MAIL FROM:%s AUTH=%s", from, auth);
|
|
else if(auth && size)
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
|
"MAIL FROM:%s AUTH=%s SIZE=%s", from, auth, size);
|
|
else
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
|
"MAIL FROM:%s SIZE=%s", from, size);
|
|
|
|
Curl_safefree(from);
|
|
Curl_safefree(auth);
|
|
Curl_safefree(size);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, SMTP_MAIL);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_rcpt_to(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SMTP *smtp = data->state.proto.smtp;
|
|
|
|
/* Send the RCPT TO command */
|
|
if(smtp->rcpt) {
|
|
if(smtp->rcpt->data[0] == '<')
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
|
|
smtp->rcpt->data);
|
|
else
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
|
|
smtp->rcpt->data);
|
|
if(!result)
|
|
state(conn, SMTP_RCPT);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For MAIL responses */
|
|
static CURLcode smtp_state_mail_resp(struct connectdata *conn, int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SMTP *smtp = data->state.proto.smtp;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode/100 != 2) {
|
|
failf(data, "MAIL failed: %d", smtpcode);
|
|
result = CURLE_SEND_ERROR;
|
|
state(conn, SMTP_STOP);
|
|
}
|
|
else {
|
|
smtp->rcpt = data->set.mail_rcpt;
|
|
|
|
result = smtp_rcpt_to(conn);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For RCPT responses */
|
|
static CURLcode smtp_state_rcpt_resp(struct connectdata *conn, int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SMTP *smtp = data->state.proto.smtp;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode/100 != 2) {
|
|
failf(data, "RCPT failed: %d", smtpcode);
|
|
result = CURLE_SEND_ERROR;
|
|
state(conn, SMTP_STOP);
|
|
}
|
|
else {
|
|
if(smtp->rcpt) {
|
|
smtp->rcpt = smtp->rcpt->next;
|
|
result = smtp_rcpt_to(conn);
|
|
|
|
/* If we failed or still are sending RCPT data then return */
|
|
if(result || smtp->rcpt)
|
|
return result;
|
|
}
|
|
|
|
/* Send the DATA command */
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "DATA");
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, SMTP_DATA);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For DATA response */
|
|
static CURLcode smtp_state_data_resp(struct connectdata *conn, int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 354) {
|
|
state(conn, SMTP_STOP);
|
|
return CURLE_SEND_ERROR;
|
|
}
|
|
|
|
/* SMTP upload */
|
|
Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
|
|
|
|
/* End of DO phase */
|
|
state(conn, SMTP_STOP);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* For POSTDATA responses, which are received after the entire DATA
|
|
part has been sent to the server */
|
|
static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
|
|
int smtpcode,
|
|
smtpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(smtpcode != 250)
|
|
result = CURLE_RECV_ERROR;
|
|
|
|
/* End of DONE phase */
|
|
state(conn, SMTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_statemach_act(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
|
struct SessionHandle *data = conn->data;
|
|
int smtpcode;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct pingpong *pp = &smtpc->pp;
|
|
size_t nread = 0;
|
|
|
|
/* Busy upgrading the connection; right now all I/O is SSL/TLS, not SMTP */
|
|
if(smtpc->state == SMTP_UPGRADETLS)
|
|
return smtp_state_upgrade_tls(conn);
|
|
|
|
/* Flush any data that needs to be sent */
|
|
if(pp->sendleft)
|
|
return Curl_pp_flushsend(pp);
|
|
|
|
/* Read the response from the server */
|
|
result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
|
|
if(result)
|
|
return result;
|
|
|
|
/* Store the latest response for later retrieval */
|
|
if(smtpc->state != SMTP_QUIT)
|
|
data->info.httpcode = smtpcode;
|
|
|
|
if(smtpcode) {
|
|
/* We have now received a full SMTP server response */
|
|
switch(smtpc->state) {
|
|
case SMTP_SERVERGREET:
|
|
result = smtp_state_servergreet_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_EHLO:
|
|
result = smtp_state_ehlo_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_HELO:
|
|
result = smtp_state_helo_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_STARTTLS:
|
|
result = smtp_state_starttls_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_PLAIN:
|
|
result = smtp_state_auth_plain_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_LOGIN:
|
|
result = smtp_state_auth_login_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_LOGIN_PASSWD:
|
|
result = smtp_state_auth_login_password_resp(conn, smtpcode,
|
|
smtpc->state);
|
|
break;
|
|
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
case SMTP_AUTH_CRAMMD5:
|
|
result = smtp_state_auth_cram_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_DIGESTMD5:
|
|
result = smtp_state_auth_digest_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_DIGESTMD5_RESP:
|
|
result = smtp_state_auth_digest_resp_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef USE_NTLM
|
|
case SMTP_AUTH_NTLM:
|
|
result = smtp_state_auth_ntlm_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_AUTH_NTLM_TYPE2MSG:
|
|
result = smtp_state_auth_ntlm_type2msg_resp(conn, smtpcode,
|
|
smtpc->state);
|
|
break;
|
|
#endif
|
|
|
|
case SMTP_AUTH_FINAL:
|
|
result = smtp_state_auth_final_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_MAIL:
|
|
result = smtp_state_mail_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_RCPT:
|
|
result = smtp_state_rcpt_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_DATA:
|
|
result = smtp_state_data_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_POSTDATA:
|
|
result = smtp_state_postdata_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_QUIT:
|
|
/* fallthrough, just stop! */
|
|
default:
|
|
/* internal error */
|
|
state(conn, SMTP_STOP);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Called repeatedly until done from multi.c */
|
|
static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
if((conn->handler->flags & PROTOPT_SSL) && !smtpc->ssldone)
|
|
result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
|
|
else
|
|
result = Curl_pp_statemach(&smtpc->pp, FALSE);
|
|
|
|
*done = (smtpc->state == SMTP_STOP) ? TRUE : FALSE;
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_block_statemach(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
while(smtpc->state != SMTP_STOP) {
|
|
result = Curl_pp_statemach(&smtpc->pp, TRUE);
|
|
if(result)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Allocate and initialize the SMTP struct for the current SessionHandle if
|
|
required */
|
|
static CURLcode smtp_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct SMTP *smtp = data->state.proto.smtp;
|
|
|
|
if(!smtp) {
|
|
smtp = data->state.proto.smtp = calloc(sizeof(struct SMTP), 1);
|
|
if(!smtp)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* For the SMTP "protocol connect" and "doing" phases only */
|
|
static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
|
int numsocks)
|
|
{
|
|
return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_connect()
|
|
*
|
|
* This function should do everything that is to be considered a part of
|
|
* the connection phase.
|
|
*
|
|
* The variable pointed to by 'done' will be TRUE if the protocol-layer
|
|
* connect phase is done when this function returns, or FALSE if not. When
|
|
* called as a part of the easy interface, it will always be TRUE.
|
|
*/
|
|
static CURLcode smtp_connect(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct pingpong *pp = &smtpc->pp;
|
|
const char *path = conn->data->state.path;
|
|
char localhost[HOSTNAME_MAX + 1];
|
|
|
|
*done = FALSE; /* default to not done yet */
|
|
|
|
/* If there already is a protocol-specific struct allocated for this
|
|
sessionhandle, deal with it */
|
|
Curl_reset_reqproto(conn);
|
|
|
|
/* Initialise the SMTP layer */
|
|
result = smtp_init(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* We always support persistent connections in SMTP */
|
|
conn->bits.close = FALSE;
|
|
|
|
/* Set the default response time-out */
|
|
pp->response_time = RESP_TIMEOUT;
|
|
pp->statemach_act = smtp_statemach_act;
|
|
pp->endofresp = smtp_endofresp;
|
|
pp->conn = conn;
|
|
|
|
/* Initialise the pingpong layer */
|
|
Curl_pp_init(pp);
|
|
|
|
/* Calculate the path if necessary */
|
|
if(!*path) {
|
|
if(!Curl_gethostname(localhost, sizeof(localhost)))
|
|
path = localhost;
|
|
else
|
|
path = "localhost";
|
|
}
|
|
|
|
/* URL decode the path and use it as the domain in our EHLO */
|
|
result = Curl_urldecode(conn->data, path, 0, &smtpc->domain, NULL, TRUE);
|
|
if(result)
|
|
return result;
|
|
|
|
/* Start off waiting for the server greeting response */
|
|
state(conn, SMTP_SERVERGREET);
|
|
|
|
result = smtp_multi_statemach(conn, done);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_done()
|
|
*
|
|
* The DONE function. This does what needs to be done after a single DO has
|
|
* performed.
|
|
*
|
|
* Input argument is already checked for validity.
|
|
*/
|
|
static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
|
|
bool premature)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SMTP *smtp = data->state.proto.smtp;
|
|
ssize_t bytes_written;
|
|
|
|
(void)premature;
|
|
|
|
if(!smtp)
|
|
/* When the easy handle is removed from the multi interface while libcurl
|
|
is still trying to resolve the host name, the SMTP struct is not yet
|
|
initialized. However, the removal action calls Curl_done() which in
|
|
turn calls this function, so we simply return success. */
|
|
return CURLE_OK;
|
|
|
|
if(status) {
|
|
conn->bits.close = TRUE; /* marked for closure */
|
|
result = status; /* use the already set error code */
|
|
}
|
|
else if(!data->set.connect_only) {
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct pingpong *pp = &smtpc->pp;
|
|
|
|
/* Send the end of block data */
|
|
result = Curl_write(conn,
|
|
conn->writesockfd, /* socket to send to */
|
|
SMTP_EOB, /* buffer pointer */
|
|
SMTP_EOB_LEN, /* buffer size */
|
|
&bytes_written); /* actually sent away */
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
if(bytes_written != SMTP_EOB_LEN) {
|
|
/* The whole chunk was not sent so keep it around and adjust the
|
|
pingpong structure accordingly */
|
|
pp->sendthis = strdup(SMTP_EOB);
|
|
pp->sendsize = SMTP_EOB_LEN;
|
|
pp->sendleft = SMTP_EOB_LEN - bytes_written;
|
|
}
|
|
else
|
|
/* Successfully sent so adjust the response timeout relative to now */
|
|
pp->response = Curl_tvnow();
|
|
|
|
state(conn, SMTP_POSTDATA);
|
|
|
|
/* Run the state-machine
|
|
|
|
TODO: when the multi interface is used, this _really_ should be using
|
|
the smtp_multi_statemach function but we have no general support for
|
|
non-blocking DONE operations, not in the multi state machine and with
|
|
Curl_done() invokes on several places in the code!
|
|
*/
|
|
result = smtp_block_statemach(conn);
|
|
}
|
|
|
|
/* Clear the transfer mode for the next request */
|
|
smtp->transfer = FTPTRANSFER_BODY;
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_perform()
|
|
*
|
|
* This is the actual DO function for SMTP. Send a mail according to the
|
|
* options previously setup.
|
|
*/
|
|
static CURLcode smtp_perform(struct connectdata *conn, bool *connected,
|
|
bool *dophase_done)
|
|
{
|
|
/* This is SMTP and no proxy */
|
|
CURLcode result = CURLE_OK;
|
|
|
|
DEBUGF(infof(conn->data, "DO phase starts\n"));
|
|
|
|
if(conn->data->set.opt_no_body) {
|
|
/* Requested no body means no transfer */
|
|
struct SMTP *smtp = conn->data->state.proto.smtp;
|
|
smtp->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
|
|
*dophase_done = FALSE; /* not done yet */
|
|
|
|
/* Start the first command in the DO phase */
|
|
result = smtp_mail(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* run the state-machine */
|
|
result = smtp_multi_statemach(conn, dophase_done);
|
|
|
|
*connected = conn->bits.tcpconnect[FIRSTSOCKET];
|
|
|
|
if(*dophase_done)
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_do()
|
|
*
|
|
* This function is registered as 'curl_do' function. It decodes the path
|
|
* parts etc as a wrapper to the actual DO function (smtp_perform).
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*/
|
|
static CURLcode smtp_do(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
*done = FALSE; /* default to false */
|
|
|
|
/* Since connections can be re-used between SessionHandles, there might be a
|
|
connection already existing but on a fresh SessionHandle struct. As such
|
|
we make sure we have a good SMTP struct to play with. For new connections
|
|
the SMTP struct is allocated and setup in the smtp_connect() function. */
|
|
Curl_reset_reqproto(conn);
|
|
result = smtp_init(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
result = smtp_regular_transfer(conn, done);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_quit()
|
|
*
|
|
* This should be called before calling sclose(). We should then wait for the
|
|
* response from the server before returning. The calling code should then try
|
|
* to close the connection.
|
|
*/
|
|
static CURLcode smtp_quit(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* Send the QUIT command */
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "QUIT");
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, SMTP_QUIT);
|
|
|
|
result = smtp_block_statemach(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_disconnect()
|
|
*
|
|
* Disconnect from an SMTP server. Cleanup protocol-specific per-connection
|
|
* resources. BLOCKING.
|
|
*/
|
|
static CURLcode smtp_disconnect(struct connectdata *conn,
|
|
bool dead_connection)
|
|
{
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
|
|
/* We cannot send quit unconditionally. If this connection is stale or
|
|
bad in any way, sending quit and waiting around here will make the
|
|
disconnect wait in vain and cause more problems than we need to. */
|
|
|
|
/* The SMTP session may or may not have been allocated/setup at this
|
|
point! */
|
|
if(!dead_connection && smtpc->pp.conn)
|
|
(void)smtp_quit(conn); /* ignore errors on QUIT */
|
|
|
|
/* Disconnect from the server */
|
|
Curl_pp_disconnect(&smtpc->pp);
|
|
|
|
/* Cleanup the SASL module */
|
|
Curl_sasl_cleanup(conn, smtpc->authused);
|
|
|
|
/* Cleanup our connection based variables */
|
|
Curl_safefree(smtpc->domain);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Call this when the DO phase has completed */
|
|
static CURLcode smtp_dophase_done(struct connectdata *conn, bool connected)
|
|
{
|
|
struct SMTP *smtp = conn->data->state.proto.smtp;
|
|
|
|
(void)connected;
|
|
|
|
if(smtp->transfer != FTPTRANSFER_BODY)
|
|
/* no data to transfer */
|
|
Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Called from multi.c while DOing */
|
|
static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done)
|
|
{
|
|
CURLcode result = smtp_multi_statemach(conn, dophase_done);
|
|
|
|
if(result)
|
|
DEBUGF(infof(conn->data, "DO phase failed\n"));
|
|
else {
|
|
if(*dophase_done) {
|
|
result = smtp_dophase_done(conn, FALSE /* not connected */);
|
|
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_regular_transfer()
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*
|
|
* Performs all commands done before a regular transfer between a local and a
|
|
* remote host.
|
|
*/
|
|
static CURLcode smtp_regular_transfer(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
bool connected = FALSE;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
/* Make sure size is unknown at this point */
|
|
data->req.size = -1;
|
|
|
|
Curl_pgrsSetUploadCounter(data, 0);
|
|
Curl_pgrsSetDownloadCounter(data, 0);
|
|
Curl_pgrsSetUploadSize(data, 0);
|
|
Curl_pgrsSetDownloadSize(data, 0);
|
|
|
|
result = smtp_perform(conn, &connected, dophase_done);
|
|
|
|
if(!result) {
|
|
if(!*dophase_done)
|
|
/* The DO phase has not completed yet */
|
|
return CURLE_OK;
|
|
|
|
result = smtp_dophase_done(conn, connected);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_setup_connection(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
|
/* Unless we have asked to tunnel SMTP operations through the proxy, we
|
|
switch and use HTTP operations only */
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->handler == &Curl_handler_smtp)
|
|
conn->handler = &Curl_handler_smtp_proxy;
|
|
else {
|
|
#ifdef USE_SSL
|
|
conn->handler = &Curl_handler_smtps_proxy;
|
|
#else
|
|
failf(data, "SMTPS not supported!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
/* We explicitly mark this connection as persistent here as we're doing
|
|
SMTP over HTTP and thus we accidentally avoid setting this value
|
|
otherwise */
|
|
conn->bits.close = FALSE;
|
|
#else
|
|
failf(data, "SMTP over http proxy requires HTTP support built-in!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
data->state.path++; /* don't include the initial slash */
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
|
|
{
|
|
/* When sending a SMTP payload we must detect CRLF. sequences making sure
|
|
they are sent as CRLF.. instead, as a . on the beginning of a line will
|
|
be deleted by the server when not part of an EOB terminator and a
|
|
genuine CRLF.CRLF which isn't escaped will wrongly be detected as end of
|
|
data by the server.
|
|
*/
|
|
ssize_t i;
|
|
ssize_t si;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
/* Do we need to allocate the scatch buffer? */
|
|
if(!data->state.scratch) {
|
|
data->state.scratch = malloc(2 * BUFSIZE);
|
|
|
|
if(!data->state.scratch) {
|
|
failf (data, "Failed to alloc scratch buffer!");
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
/* This loop can be improved by some kind of Boyer-Moore style of
|
|
approach but that is saved for later... */
|
|
for(i = 0, si = 0; i < nread; i++) {
|
|
if(SMTP_EOB[smtpc->eob] == data->req.upload_fromhere[i])
|
|
smtpc->eob++;
|
|
else if(smtpc->eob) {
|
|
/* A previous substring matched so output that first */
|
|
memcpy(&data->state.scratch[si], SMTP_EOB, smtpc->eob);
|
|
si += smtpc->eob;
|
|
|
|
/* Then compare the first byte */
|
|
if(SMTP_EOB[0] == data->req.upload_fromhere[i])
|
|
smtpc->eob = 1;
|
|
else
|
|
smtpc->eob = 0;
|
|
}
|
|
|
|
/* Do we have a match for CRLF. as per RFC-2821, sect. 4.5.2 */
|
|
if(SMTP_EOB_FIND_LEN == smtpc->eob) {
|
|
/* Copy the replacement data to the target buffer */
|
|
memcpy(&data->state.scratch[si], SMTP_EOB_REPL, SMTP_EOB_REPL_LEN);
|
|
si += SMTP_EOB_REPL_LEN;
|
|
smtpc->eob = 0;
|
|
}
|
|
else if(!smtpc->eob)
|
|
data->state.scratch[si++] = data->req.upload_fromhere[i];
|
|
}
|
|
|
|
if(smtpc->eob) {
|
|
/* A substring matched before processing ended so output that now */
|
|
memcpy(&data->state.scratch[si], SMTP_EOB, smtpc->eob);
|
|
si += smtpc->eob;
|
|
smtpc->eob = 0;
|
|
}
|
|
|
|
if(si != nread) {
|
|
/* Only use the new buffer if we replaced something */
|
|
nread = si;
|
|
|
|
/* Upload from the new (replaced) buffer instead */
|
|
data->req.upload_fromhere = data->state.scratch;
|
|
|
|
/* Set the new amount too */
|
|
data->req.upload_present = nread;
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#endif /* CURL_DISABLE_SMTP */
|