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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.
107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
#ifndef HEADER_CURL_POP3_H
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#define HEADER_CURL_POP3_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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* POP3 unique setup
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***************************************************************************/
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typedef enum {
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POP3_STOP, /* do nothing state, stops the state machine */
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POP3_SERVERGREET, /* waiting for the initial greeting immediately after
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a connect */
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POP3_CAPA,
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POP3_STARTTLS,
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POP3_UPGRADETLS, /* asynchronously upgrade the connection to SSL/TLS
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(multi mode only) */
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POP3_AUTH_PLAIN,
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POP3_AUTH_LOGIN,
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POP3_AUTH_LOGIN_PASSWD,
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POP3_AUTH_CRAMMD5,
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POP3_AUTH_DIGESTMD5,
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POP3_AUTH_DIGESTMD5_RESP,
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POP3_AUTH_NTLM,
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POP3_AUTH_NTLM_TYPE2MSG,
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POP3_AUTH_XOAUTH2,
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POP3_AUTH_CANCEL,
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POP3_AUTH_FINAL,
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POP3_APOP,
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POP3_USER,
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POP3_PASS,
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POP3_COMMAND,
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POP3_QUIT,
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POP3_LAST /* never used */
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} pop3state;
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/* This POP3 struct is used in the SessionHandle. All POP3 data that is
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connection-oriented must be in pop3_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 POP3 {
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curl_pp_transfer transfer;
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char *id; /* Message ID */
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char *custom; /* Custom Request */
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};
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/* pop3_conn is used for struct connection-oriented data in the connectdata
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struct */
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struct pop3_conn {
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struct pingpong pp;
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pop3state state; /* Always use pop3.c:state() to change state! */
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bool ssldone; /* Is connect() over SSL done? */
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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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size_t strip; /* Number of bytes from the start to ignore as
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non-body */
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unsigned int authtypes; /* Accepted authentication types */
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unsigned int authmechs; /* Accepted SASL authentication mechanisms */
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unsigned int preftype; /* Preferred authentication type */
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unsigned int prefmech; /* Preferred SASL authentication mechanism */
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unsigned int authused; /* SASL auth mechanism used for the connection */
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char *apoptimestamp; /* APOP timestamp from the server greeting */
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bool tls_supported; /* StartTLS capability supported by server */
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};
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extern const struct Curl_handler Curl_handler_pop3;
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extern const struct Curl_handler Curl_handler_pop3s;
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/* Authentication type flags */
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#define POP3_TYPE_CLEARTEXT (1 << 0)
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#define POP3_TYPE_APOP (1 << 1)
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#define POP3_TYPE_SASL (1 << 2)
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/* Authentication type values */
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#define POP3_TYPE_NONE 0
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#define POP3_TYPE_ANY ~0
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/* This is the 5-bytes End-Of-Body marker for POP3 */
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#define POP3_EOB "\x0d\x0a\x2e\x0d\x0a"
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#define POP3_EOB_LEN 5
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/* This function scans the body after the end-of-body and writes everything
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* until the end is found */
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CURLcode Curl_pop3_write(struct connectdata *conn, char *str, size_t nread);
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#endif /* HEADER_CURL_POP3_H */
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