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https://github.com/moparisthebest/curl
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Should a client application fail to decode an authentication message received from a server, or not support any of the parameters given by the server in the message, then the authentication phrase should be cancelled gracefully by the client rather than simply terminating the connection. The authentication phrase should be cancelled by simply sending a '*' to the server, in response to erroneous data being received, as per RFC-3501, RFC-4954 and RFC-5034. This patch adds the necessary state machine constants and appropriate response handlers in order to add this functionality for the CRAM-MD5, DIGEST-MD5 and NTLM authentication mechanisms.
100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
#ifndef HEADER_CURL_SMTP_H
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#define HEADER_CURL_SMTP_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2009 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "pingpong.h"
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/****************************************************************************
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* SMTP unique setup
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***************************************************************************/
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typedef enum {
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SMTP_STOP, /* do nothing state, stops the state machine */
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SMTP_SERVERGREET, /* waiting for the initial greeting immediately after
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a connect */
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SMTP_EHLO,
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SMTP_HELO,
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SMTP_STARTTLS,
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SMTP_UPGRADETLS, /* asynchronously upgrade the connection to SSL/TLS
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(multi mode only) */
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SMTP_AUTH_PLAIN,
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SMTP_AUTH_LOGIN,
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SMTP_AUTH_LOGIN_PASSWD,
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SMTP_AUTH_CRAMMD5,
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SMTP_AUTH_DIGESTMD5,
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SMTP_AUTH_DIGESTMD5_RESP,
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SMTP_AUTH_NTLM,
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SMTP_AUTH_NTLM_TYPE2MSG,
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SMTP_AUTH_XOAUTH2,
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SMTP_AUTH_CANCEL,
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SMTP_AUTH_FINAL,
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SMTP_MAIL, /* MAIL FROM */
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SMTP_RCPT, /* RCPT TO */
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SMTP_DATA,
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SMTP_POSTDATA,
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SMTP_QUIT,
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SMTP_LAST /* never used */
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} smtpstate;
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/* This SMTP struct is used in the SessionHandle. All SMTP data that is
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connection-oriented must be in smtp_conn to properly deal with the fact that
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perhaps the SessionHandle is changed between the times the connection is
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used. */
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struct SMTP {
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curl_pp_transfer transfer;
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struct curl_slist *rcpt; /* Recipient list */
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size_t eob; /* Number of bytes of the EOB (End Of Body) that
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have been received so far */
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bool trailing_crlf; /* Specifies if the tailing CRLF is present */
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};
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/* smtp_conn is used for struct connection-oriented data in the connectdata
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struct */
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struct smtp_conn {
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struct pingpong pp;
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smtpstate state; /* Always use smtp.c:state() to change state! */
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bool ssldone; /* Is connect() over SSL done? */
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char *domain; /* Client address/name to send in the EHLO */
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unsigned int authmechs; /* Accepted authentication mechanisms */
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unsigned int prefmech; /* Preferred authentication mechanism */
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unsigned int authused; /* Auth mechanism used for the connection */
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bool tls_supported; /* StartTLS capability supported by server */
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bool size_supported; /* If server supports SIZE extension according to
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RFC 1870 */
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};
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extern const struct Curl_handler Curl_handler_smtp;
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extern const struct Curl_handler Curl_handler_smtps;
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/* this is the 5-bytes End-Of-Body marker for SMTP */
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#define SMTP_EOB "\x0d\x0a\x2e\x0d\x0a"
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#define SMTP_EOB_LEN 5
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#define SMTP_EOB_FIND_LEN 3
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/* if found in data, replace it with this string instead */
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#define SMTP_EOB_REPL "\x0d\x0a\x2e\x2e"
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#define SMTP_EOB_REPL_LEN 4
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CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread);
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#endif /* HEADER_CURL_SMTP_H */
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