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smtp: Fixed login denied when server doesn't support AUTH capability

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Specifying user credentials when the SMTP server doesn't support
authentication would cause curl to display "No known authentication
mechanisms supported!" and return CURLE_LOGIN_DENIED.

Reported-by: Tom Sparrow
Bug: http://curl.haxx.se/mail/lib-2014-03/0173.html
This commit is contained in:
Steve Holme 2014-03-28 18:21:27 +00:00
parent 2dc63c72dc
commit fe260b75e7
2 changed files with 16 additions and 10 deletions
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23
lib/smtp.c
View File

@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___ * | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____| * \___|\___/|_| \_\_____|
* *
* Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al. * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
* *
* This software is licensed as described in the file COPYING, which * This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms * you should have received as part of this distribution. The terms
@ -349,10 +349,11 @@ static CURLcode smtp_perform_ehlo(struct connectdata *conn)
CURLcode result = CURLE_OK; CURLcode result = CURLE_OK;
struct smtp_conn *smtpc = &conn->proto.smtpc; struct smtp_conn *smtpc = &conn->proto.smtpc;
smtpc->authmechs = 0; /* No known authentication mechanisms yet */ smtpc->authmechs = 0; /* No known authentication mechanisms yet */
smtpc->authused = 0; /* Clear the authentication mechanism used smtpc->authused = 0; /* Clear the authentication mechanism used
for esmtp connections */ for esmtp connections */
smtpc->tls_supported = FALSE; /* Clear the TLS capability */ smtpc->tls_supported = FALSE; /* Clear the TLS capability */
smtpc->auth_supported = FALSE; /* Clear the AUTH capability */
/* Send the EHLO command */ /* Send the EHLO command */
result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain); result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain);
@ -475,15 +476,16 @@ static CURLcode smtp_perform_auth(struct connectdata *conn,
static CURLcode smtp_perform_authentication(struct connectdata *conn) static CURLcode smtp_perform_authentication(struct connectdata *conn)
{ {
CURLcode result = CURLE_OK; CURLcode result = CURLE_OK;
struct smtp_conn *smtpc = &conn->proto.smtpc;
const char *mech = NULL; const char *mech = NULL;
char *initresp = NULL; char *initresp = NULL;
size_t len = 0; size_t len = 0;
smtpstate state1 = SMTP_STOP; smtpstate state1 = SMTP_STOP;
smtpstate state2 = SMTP_STOP; smtpstate state2 = SMTP_STOP;
/* Check we have a username and password to authenticate with and end the /* Check we have a username and password to authenticate with, and the
connect phase if we don't */ server supports authentiation, and end the connect phase if not */
if(!conn->bits.user_passwd) { if(!conn->bits.user_passwd || !smtpc->auth_supported) {
state(conn, SMTP_STOP); state(conn, SMTP_STOP);
return result; return result;
@ -739,8 +741,11 @@ static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
else if(len >= 4 && !memcmp(line, "SIZE", 4)) else if(len >= 4 && !memcmp(line, "SIZE", 4))
smtpc->size_supported = TRUE; smtpc->size_supported = TRUE;
/* Do we have the authentication mechanism list? */ /* Does the server support authentication? */
else if(len >= 5 && !memcmp(line, "AUTH ", 5)) { else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
smtpc->auth_supported = TRUE;
/* Advance past the AUTH keyword */
line += 5; line += 5;
len -= 5; len -= 5;

3
lib/smtp.h
View File

@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___ * | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____| * \___|\___/|_| \_\_____|
* *
* Copyright (C) 2009 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al. * Copyright (C) 2009 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
* *
* This software is licensed as described in the file COPYING, which * This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms * you should have received as part of this distribution. The terms
@ -82,6 +82,7 @@ struct smtp_conn {
bool tls_supported; /* StartTLS capability supported by server */ bool tls_supported; /* StartTLS capability supported by server */
bool size_supported; /* If server supports SIZE extension according to bool size_supported; /* If server supports SIZE extension according to
RFC 1870 */ RFC 1870 */
bool auth_supported; /* AUTH capability supported by server */
}; };
extern const struct Curl_handler Curl_handler_smtp; extern const struct Curl_handler Curl_handler_smtp;