mirror of
https://github.com/moparisthebest/curl
synced 2024-11-16 14:35:03 -05:00
2897ce7dc2
... it also clobbered the 'result' return value so that it wouldn't return the error back to the parent function properly, which broke test 809 when run with 'multi-always'.
1764 lines
49 KiB
C
1764 lines
49 KiB
C
/***************************************************************************
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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) 1998 - 2012, 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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* RFC1734 POP3 Authentication
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* RFC1939 POP3 protocol
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* RFC2195 CRAM-MD5 authentication
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* RFC2384 POP URL Scheme
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* RFC2449 POP3 Extension Mechanism
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* RFC2595 Using TLS with IMAP, POP3 and ACAP
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* RFC2831 DIGEST-MD5 authentication
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* RFC4616 PLAIN authentication
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*
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***************************************************************************/
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#include "setup.h"
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#ifndef CURL_DISABLE_POP3
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_UTSNAME_H
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#include <sys/utsname.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef __VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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#undef in_addr_t
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#define in_addr_t unsigned long
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#endif
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#include <curl/curl.h>
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#include "urldata.h"
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#include "sendf.h"
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#include "if2ip.h"
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#include "hostip.h"
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#include "progress.h"
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#include "transfer.h"
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#include "escape.h"
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#include "http.h" /* for HTTP proxy tunnel stuff */
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#include "socks.h"
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#include "pop3.h"
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#include "strtoofft.h"
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#include "strequal.h"
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#include "sslgen.h"
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#include "connect.h"
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#include "strerror.h"
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#include "select.h"
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#include "multiif.h"
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#include "url.h"
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#include "rawstr.h"
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#include "curl_sasl.h"
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#include "curl_md5.h"
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#include "warnless.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/* Local API functions */
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static CURLcode pop3_parse_url_path(struct connectdata *conn);
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static CURLcode pop3_parse_custom_request(struct connectdata *conn);
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static CURLcode pop3_regular_transfer(struct connectdata *conn, bool *done);
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static CURLcode pop3_do(struct connectdata *conn, bool *done);
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static CURLcode pop3_done(struct connectdata *conn,
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CURLcode, bool premature);
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static CURLcode pop3_connect(struct connectdata *conn, bool *done);
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static CURLcode pop3_disconnect(struct connectdata *conn, bool dead);
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static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done);
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static int pop3_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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static CURLcode pop3_doing(struct connectdata *conn,
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bool *dophase_done);
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static CURLcode pop3_setup_connection(struct connectdata * conn);
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/*
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* POP3 protocol handler.
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*/
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const struct Curl_handler Curl_handler_pop3 = {
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"POP3", /* scheme */
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pop3_setup_connection, /* setup_connection */
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pop3_do, /* do_it */
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pop3_done, /* done */
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ZERO_NULL, /* do_more */
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pop3_connect, /* connect_it */
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pop3_multi_statemach, /* connecting */
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pop3_doing, /* doing */
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pop3_getsock, /* proto_getsock */
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pop3_getsock, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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pop3_disconnect, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_POP3, /* defport */
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CURLPROTO_POP3, /* protocol */
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PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY /* flags */
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};
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#ifdef USE_SSL
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/*
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* POP3S protocol handler.
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*/
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const struct Curl_handler Curl_handler_pop3s = {
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"POP3S", /* scheme */
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pop3_setup_connection, /* setup_connection */
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pop3_do, /* do_it */
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pop3_done, /* done */
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ZERO_NULL, /* do_more */
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pop3_connect, /* connect_it */
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pop3_multi_statemach, /* connecting */
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pop3_doing, /* doing */
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pop3_getsock, /* proto_getsock */
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pop3_getsock, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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pop3_disconnect, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_POP3S, /* defport */
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CURLPROTO_POP3 | CURLPROTO_POP3S, /* protocol */
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PROTOPT_CLOSEACTION | PROTOPT_SSL
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| PROTOPT_NOURLQUERY /* flags */
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};
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#endif
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#ifndef CURL_DISABLE_HTTP
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/*
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* HTTP-proxyed POP3 protocol handler.
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*/
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static const struct Curl_handler Curl_handler_pop3_proxy = {
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"POP3", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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ZERO_NULL, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_POP3, /* defport */
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CURLPROTO_HTTP, /* protocol */
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PROTOPT_NONE /* flags */
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};
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#ifdef USE_SSL
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/*
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* HTTP-proxyed POP3S protocol handler.
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*/
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static const struct Curl_handler Curl_handler_pop3s_proxy = {
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"POP3S", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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ZERO_NULL, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_POP3S, /* defport */
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CURLPROTO_HTTP, /* protocol */
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PROTOPT_NONE /* flags */
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};
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#endif
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#endif
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/* Function that checks for an ending pop3 status code at the start of the
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given string, but also detects the APOP timestamp from the server greeting
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as well as the supported authentication types and allowed SASL mechanisms
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from the CAPA response. */
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static int pop3_endofresp(struct pingpong *pp, int *resp)
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{
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char *line = pp->linestart_resp;
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size_t len = strlen(pp->linestart_resp);
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struct connectdata *conn = pp->conn;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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size_t wordlen;
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size_t i;
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/* Do we have an error response? */
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if(len >= 4 && !memcmp("-ERR", line, 4)) {
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*resp = '-';
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return FALSE;
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}
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/* Are we processing servergreet responses */
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if(pop3c->state == POP3_SERVERGREET) {
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/* Look for the APOP timestamp */
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if(len >= 3 && line[len - 3] == '>') {
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for(i = 0; i < len - 3; ++i) {
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if(line[i] == '<') {
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/* Calculate the length of the timestamp */
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size_t timestamplen = len - 2 - i;
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/* Allocate some memory for the timestamp */
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pop3c->apoptimestamp = (char *)calloc(1, timestamplen + 1);
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if(!pop3c->apoptimestamp)
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break;
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/* Copy the timestamp */
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memcpy(pop3c->apoptimestamp, line + i, timestamplen);
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pop3c->apoptimestamp[timestamplen] = '\0';
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break;
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}
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}
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}
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}
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/* Are we processing CAPA command responses? */
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else if(pop3c->state == POP3_CAPA) {
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/* Do we have the terminating character? */
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if(len >= 1 && !memcmp(line, ".", 1)) {
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*resp = '+';
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return TRUE;
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}
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/* Does the server support clear text? */
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if(len >= 4 && !memcmp(line, "USER", 4)) {
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pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
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return FALSE;
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}
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/* Does the server support APOP? */
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if(len >= 4 && !memcmp(line, "APOP", 4)) {
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pop3c->authtypes |= POP3_TYPE_APOP;
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return FALSE;
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}
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/* Does the server support SASL? */
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if(len < 4 || memcmp(line, "SASL", 4))
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return FALSE;
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pop3c->authtypes |= POP3_TYPE_SASL;
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/* Advance past the SASL keyword */
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line += 4;
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len -= 4;
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/* Loop through the data line */
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for(;;) {
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while(len &&
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(*line == ' ' || *line == '\t' ||
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*line == '\r' || *line == '\n')) {
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if(*line == '\n')
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return FALSE;
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line++;
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len--;
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}
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if(!len)
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break;
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/* Extract the word */
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for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
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line[wordlen] != '\t' && line[wordlen] != '\r' &&
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line[wordlen] != '\n';)
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wordlen++;
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/* Test the word for a matching authentication mechanism */
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if(wordlen == 5 && !memcmp(line, "LOGIN", 5))
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pop3c->authmechs |= SASL_MECH_LOGIN;
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else if(wordlen == 5 && !memcmp(line, "PLAIN", 5))
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pop3c->authmechs |= SASL_MECH_PLAIN;
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else if(wordlen == 8 && !memcmp(line, "CRAM-MD5", 8))
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pop3c->authmechs |= SASL_MECH_CRAM_MD5;
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else if(wordlen == 10 && !memcmp(line, "DIGEST-MD5", 10))
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pop3c->authmechs |= SASL_MECH_DIGEST_MD5;
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else if(wordlen == 6 && !memcmp(line, "GSSAPI", 6))
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pop3c->authmechs |= SASL_MECH_GSSAPI;
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else if(wordlen == 8 && !memcmp(line, "EXTERNAL", 8))
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pop3c->authmechs |= SASL_MECH_EXTERNAL;
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else if(wordlen == 4 && !memcmp(line, "NTLM", 4))
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pop3c->authmechs |= SASL_MECH_NTLM;
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line += wordlen;
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len -= wordlen;
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}
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}
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if((len < 1 || memcmp("+", line, 1)) &&
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(len < 3 || memcmp("+OK", line, 3)))
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return FALSE; /* Nothing for us */
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/* Otherwise it's a positive response */
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*resp = '+';
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return TRUE;
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}
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/* This is the ONLY way to change POP3 state! */
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static void state(struct connectdata *conn, pop3state newstate)
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{
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#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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/* for debug purposes */
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static const char * const names[] = {
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"STOP",
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"SERVERGREET",
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"STARTTLS",
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"CAPA",
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"AUTH_PLAIN",
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"AUTH_LOGIN",
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"AUTH_LOGIN_PASSWD",
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"AUTH_CRAMMD5",
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"AUTH_DIGESTMD5",
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"AUTH_DIGESTMD5_RESP",
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"AUTH_NTLM",
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"AUTH_NTLM_TYPE2MSG",
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"AUTH",
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"APOP",
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"USER",
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"PASS",
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"COMMAND",
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"QUIT",
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/* LAST */
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};
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#endif
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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if(pop3c->state != newstate)
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infof(conn->data, "POP3 %p state change from %s to %s\n",
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pop3c, names[pop3c->state], names[newstate]);
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#endif
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pop3c->state = newstate;
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}
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static CURLcode pop3_state_capa(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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pop3c->authmechs = 0; /* No known authentication mechanisms yet */
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pop3c->authused = 0; /* Clear the authentication mechanism used */
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/* Check we have a username and password to authenticate with and end the
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connect phase if we don't */
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if(!conn->bits.user_passwd) {
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state(conn, POP3_STOP);
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return result;
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}
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/* Send the CAPA command */
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result = Curl_pp_sendf(&pop3c->pp, "CAPA");
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if(result)
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return result;
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state(conn, POP3_CAPA);
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return CURLE_OK;
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}
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static CURLcode pop3_state_user(struct connectdata *conn)
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{
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CURLcode result;
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struct FTP *pop3 = conn->data->state.proto.pop3;
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/* Send the USER command */
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result = Curl_pp_sendf(&conn->proto.pop3c.pp, "USER %s",
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pop3->user ? pop3->user : "");
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if(result)
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return result;
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state(conn, POP3_USER);
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return CURLE_OK;
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}
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#ifndef CURL_DISABLE_CRYPTO_AUTH
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static CURLcode pop3_state_apop(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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size_t i;
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MD5_context *ctxt;
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unsigned char digest[MD5_DIGEST_LEN];
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char secret[2 * MD5_DIGEST_LEN + 1];
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ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
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if(!ctxt)
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return CURLE_OUT_OF_MEMORY;
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Curl_MD5_update(ctxt, (const unsigned char *) pop3c->apoptimestamp,
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curlx_uztoui(strlen(pop3c->apoptimestamp)));
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Curl_MD5_update(ctxt, (const unsigned char *) conn->passwd,
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curlx_uztoui(strlen(conn->passwd)));
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/* Finalise the digest */
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Curl_MD5_final(ctxt, digest);
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/* Convert the calculated 16 octet digest into a 32 byte hex string */
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for(i = 0; i < MD5_DIGEST_LEN; i++)
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snprintf(&secret[2 * i], 3, "%02x", digest[i]);
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result = Curl_pp_sendf(&pop3c->pp, "APOP %s %s", conn->user, secret);
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if(!result)
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state(conn, POP3_APOP);
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return result;
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}
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#endif
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static CURLcode pop3_authenticate(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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const char *mech = NULL;
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pop3state authstate = POP3_STOP;
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|
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/* Check supported authentication mechanisms by decreasing order of
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security */
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#ifndef CURL_DISABLE_CRYPTO_AUTH
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if(pop3c->authmechs & SASL_MECH_DIGEST_MD5) {
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mech = "DIGEST-MD5";
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authstate = POP3_AUTH_DIGESTMD5;
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pop3c->authused = SASL_MECH_DIGEST_MD5;
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}
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else if(pop3c->authmechs & SASL_MECH_CRAM_MD5) {
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mech = "CRAM-MD5";
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authstate = POP3_AUTH_CRAMMD5;
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pop3c->authused = SASL_MECH_CRAM_MD5;
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}
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else
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#endif
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#ifdef USE_NTLM
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if(pop3c->authmechs & SASL_MECH_NTLM) {
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mech = "NTLM";
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authstate = POP3_AUTH_NTLM;
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pop3c->authused = SASL_MECH_NTLM;
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}
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else
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#endif
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if(pop3c->authmechs & SASL_MECH_LOGIN) {
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mech = "LOGIN";
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authstate = POP3_AUTH_LOGIN;
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pop3c->authused = SASL_MECH_LOGIN;
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}
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else if(pop3c->authmechs & SASL_MECH_PLAIN) {
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mech = "PLAIN";
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authstate = POP3_AUTH_PLAIN;
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pop3c->authused = SASL_MECH_PLAIN;
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}
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else {
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infof(conn->data, "No known SASL authentication mechanisms supported!\n");
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result = CURLE_LOGIN_DENIED; /* Other mechanisms not supported */
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}
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|
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if(!result) {
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result = Curl_pp_sendf(&pop3c->pp, "AUTH %s", mech);
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|
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if(!result)
|
|
state(conn, authstate);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For the POP3 "protocol connect" and "doing" phases only */
|
|
static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks,
|
|
int numsocks)
|
|
{
|
|
return Curl_pp_getsock(&conn->proto.pop3c.pp, socks, numsocks);
|
|
}
|
|
|
|
#ifdef USE_SSL
|
|
static void pop3_to_pop3s(struct connectdata *conn)
|
|
{
|
|
conn->handler = &Curl_handler_pop3s;
|
|
}
|
|
#else
|
|
#define pop3_to_pop3s(x) Curl_nop_stmt
|
|
#endif
|
|
|
|
/* For the initial server greeting */
|
|
static CURLcode pop3_state_servergreet_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Got unexpected pop3-server response");
|
|
return CURLE_FTP_WEIRD_SERVER_REPLY;
|
|
}
|
|
|
|
if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
|
/* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
|
|
to TLS connection now */
|
|
result = Curl_pp_sendf(&pop3c->pp, "STLS");
|
|
state(conn, POP3_STARTTLS);
|
|
}
|
|
else
|
|
result = pop3_state_capa(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For STARTTLS responses */
|
|
static CURLcode pop3_state_starttls_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
if(data->set.use_ssl != CURLUSESSL_TRY) {
|
|
failf(data, "STARTTLS denied. %c", pop3code);
|
|
result = CURLE_USE_SSL_FAILED;
|
|
state(conn, POP3_STOP);
|
|
}
|
|
else
|
|
result = pop3_state_capa(conn);
|
|
}
|
|
else {
|
|
/* Curl_ssl_connect is BLOCKING */
|
|
result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
|
if(CURLE_OK == result) {
|
|
pop3_to_pop3s(conn);
|
|
result = pop3_state_capa(conn);
|
|
}
|
|
else {
|
|
/* End of connect phase */
|
|
state(conn, POP3_STOP);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For CAPA responses */
|
|
static CURLcode pop3_state_capa_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+')
|
|
result = pop3_state_user(conn);
|
|
else {
|
|
/* Check supported authentication types by decreasing order of security */
|
|
if(conn->proto.pop3c.authtypes & POP3_TYPE_SASL)
|
|
result = pop3_authenticate(conn);
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
else if(conn->proto.pop3c.authtypes & POP3_TYPE_APOP)
|
|
result = pop3_state_apop(conn);
|
|
#endif
|
|
else if(conn->proto.pop3c.authtypes & POP3_TYPE_CLEARTEXT)
|
|
result = pop3_state_user(conn);
|
|
else {
|
|
infof(conn->data, "No known authentication types supported!\n");
|
|
result = CURLE_LOGIN_DENIED; /* Other types not supported */
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH PLAIN responses */
|
|
static CURLcode pop3_state_auth_plain_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state 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(pop3code != '+') {
|
|
failf(data, "Access denied. %c", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the authorisation message */
|
|
result = Curl_sasl_create_plain_message(data, conn->user, conn->passwd,
|
|
&plainauth, &len);
|
|
|
|
/* Send the message */
|
|
if(!result) {
|
|
if(plainauth) {
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", plainauth);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH);
|
|
}
|
|
Curl_safefree(plainauth);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH LOGIN responses */
|
|
static CURLcode pop3_state_auth_login_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state 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(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the user message */
|
|
result = Curl_sasl_create_login_message(data, conn->user,
|
|
&authuser, &len);
|
|
|
|
/* Send the user */
|
|
if(!result) {
|
|
if(authuser) {
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", authuser);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH_LOGIN_PASSWD);
|
|
}
|
|
Curl_safefree(authuser);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH LOGIN user entry responses */
|
|
static CURLcode pop3_state_auth_login_password_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state 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(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the password message */
|
|
result = Curl_sasl_create_login_message(data, conn->passwd,
|
|
&authpasswd, &len);
|
|
|
|
/* Send the password */
|
|
if(!result) {
|
|
if(authpasswd) {
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", authpasswd);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH);
|
|
}
|
|
Curl_safefree(authpasswd);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
/* For AUTH CRAM-MD5 responses */
|
|
static CURLcode pop3_state_auth_cram_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state 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(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
return CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* Get the challenge */
|
|
for(chlg64 += 2; *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.pop3c.pp, "%s", rplyb64);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH);
|
|
}
|
|
Curl_safefree(rplyb64);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH DIGEST-MD5 challenge responses */
|
|
static CURLcode pop3_state_auth_digest_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state 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(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
return CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* Get the challenge */
|
|
for(chlg64 += 2; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
|
|
;
|
|
|
|
/* Create the response message */
|
|
result = Curl_sasl_create_digest_md5_message(data, chlg64, conn->user,
|
|
conn->passwd, "pop",
|
|
&rplyb64, &len);
|
|
|
|
/* Send the response */
|
|
if(!result) {
|
|
if(rplyb64) {
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", rplyb64);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH_DIGESTMD5_RESP);
|
|
}
|
|
|
|
Curl_safefree(rplyb64);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For AUTH DIGEST-MD5 challenge-response responses */
|
|
static CURLcode pop3_state_auth_digest_resp_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Authentication failed: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Send an empty response */
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "");
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_NTLM
|
|
/* For AUTH NTLM responses */
|
|
static CURLcode pop3_state_auth_ntlm_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
size_t len = 0;
|
|
char *type1msg = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
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.pop3c.pp, "%s", type1msg);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH_NTLM_TYPE2MSG);
|
|
}
|
|
|
|
Curl_safefree(type1msg);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For NTLM type-2 responses (sent in reponse to our type-1 message) */
|
|
static CURLcode pop3_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
size_t len = 0;
|
|
char *type3msg = NULL;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Access denied: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else {
|
|
/* Create the type-3 message */
|
|
result = Curl_sasl_create_ntlm_type3_message(data,
|
|
data->state.buffer + 2,
|
|
conn->user, conn->passwd,
|
|
&conn->ntlm,
|
|
&type3msg, &len);
|
|
|
|
/* Send the message */
|
|
if(!result) {
|
|
if(type3msg) {
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", type3msg);
|
|
|
|
if(!result)
|
|
state(conn, POP3_AUTH);
|
|
}
|
|
|
|
Curl_safefree(type3msg);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
/* For final responses to the AUTH sequence */
|
|
static CURLcode pop3_state_auth_final_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Authentication failed: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* End of connect phase */
|
|
state(conn, POP3_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_state_apop_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Authentication failed: %d", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* End of connect phase */
|
|
state(conn, POP3_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For USER responses */
|
|
static CURLcode pop3_state_user_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Access denied. %c", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
else
|
|
/* Send the PASS command */
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "PASS %s",
|
|
pop3->passwd ? pop3->passwd : "");
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, POP3_PASS);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For PASS responses */
|
|
static CURLcode pop3_state_pass_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
failf(data, "Access denied. %c", pop3code);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
|
|
/* End of connect phase */
|
|
state(conn, POP3_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For command responses */
|
|
static CURLcode pop3_state_command_resp(struct connectdata *conn,
|
|
int pop3code,
|
|
pop3state instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
if(pop3code != '+') {
|
|
state(conn, POP3_STOP);
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
|
|
/* This 'OK' line ends with a CR LF pair which is the two first bytes of the
|
|
EOB string so count this is two matching bytes. This is necessary to make
|
|
the code detect the EOB if the only data than comes now is %2e CR LF like
|
|
when there is no body to return. */
|
|
pop3c->eob = 2;
|
|
|
|
/* But since this initial CR LF pair is not part of the actual body, we set
|
|
the strip counter here so that these bytes won't be delivered. */
|
|
pop3c->strip = 2;
|
|
|
|
/* POP3 download */
|
|
Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, pop3->bytecountp,
|
|
-1, NULL); /* no upload here */
|
|
|
|
if(pp->cache) {
|
|
/* The header "cache" contains a bunch of data that is actually body
|
|
content so send it as such. Note that there may even be additional
|
|
"headers" after the body */
|
|
|
|
if(!data->set.opt_no_body) {
|
|
result = Curl_pop3_write(conn, pp->cache, pp->cache_size);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
/* Free the cache */
|
|
Curl_safefree(pp->cache);
|
|
|
|
/* Reset the cache size */
|
|
pp->cache_size = 0;
|
|
}
|
|
|
|
/* End of do phase */
|
|
state(conn, POP3_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Start the DO phase for the command */
|
|
static CURLcode pop3_command(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
const char *command = NULL;
|
|
|
|
/* Calculate the default command */
|
|
if(pop3c->mailbox[0] == '\0' || conn->data->set.ftp_list_only) {
|
|
command = "LIST";
|
|
|
|
if(pop3c->mailbox[0] != '\0') {
|
|
/* Message specific LIST so skip the BODY transfer */
|
|
struct FTP *pop3 = conn->data->state.proto.pop3;
|
|
pop3->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
}
|
|
else
|
|
command = "RETR";
|
|
|
|
/* Send the command */
|
|
if(pop3c->mailbox[0] != '\0')
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s %s",
|
|
(pop3c->custom && pop3c->custom[0] != '\0' ?
|
|
pop3c->custom : command), pop3c->mailbox);
|
|
else
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp,
|
|
(pop3c->custom && pop3c->custom[0] != '\0' ?
|
|
pop3c->custom : command));
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, POP3_COMMAND);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_statemach_act(struct connectdata *conn)
|
|
{
|
|
CURLcode result;
|
|
curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
|
int pop3code;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
size_t nread = 0;
|
|
|
|
/* 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, &pop3code, &nread);
|
|
if(result)
|
|
return result;
|
|
|
|
if(pop3code) {
|
|
/* We have now received a full POP3 server response */
|
|
switch(pop3c->state) {
|
|
case POP3_SERVERGREET:
|
|
result = pop3_state_servergreet_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_STARTTLS:
|
|
result = pop3_state_starttls_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_CAPA:
|
|
result = pop3_state_capa_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_PLAIN:
|
|
result = pop3_state_auth_plain_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_LOGIN:
|
|
result = pop3_state_auth_login_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_LOGIN_PASSWD:
|
|
result = pop3_state_auth_login_password_resp(conn, pop3code,
|
|
pop3c->state);
|
|
break;
|
|
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
|
case POP3_AUTH_CRAMMD5:
|
|
result = pop3_state_auth_cram_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_DIGESTMD5:
|
|
result = pop3_state_auth_digest_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_DIGESTMD5_RESP:
|
|
result = pop3_state_auth_digest_resp_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef USE_NTLM
|
|
case POP3_AUTH_NTLM:
|
|
result = pop3_state_auth_ntlm_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_AUTH_NTLM_TYPE2MSG:
|
|
result = pop3_state_auth_ntlm_type2msg_resp(conn, pop3code,
|
|
pop3c->state);
|
|
break;
|
|
#endif
|
|
|
|
case POP3_AUTH:
|
|
result = pop3_state_auth_final_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_APOP:
|
|
result = pop3_state_apop_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_USER:
|
|
result = pop3_state_user_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_PASS:
|
|
result = pop3_state_pass_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_COMMAND:
|
|
result = pop3_state_command_resp(conn, pop3code, pop3c->state);
|
|
break;
|
|
|
|
case POP3_QUIT:
|
|
/* fallthrough, just stop! */
|
|
default:
|
|
/* internal error */
|
|
state(conn, POP3_STOP);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Called repeatedly until done from multi.c */
|
|
static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done)
|
|
{
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
CURLcode result = Curl_pp_multi_statemach(&pop3c->pp);
|
|
|
|
*done = (pop3c->state == POP3_STOP) ? TRUE : FALSE;
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_easy_statemach(struct connectdata *conn)
|
|
{
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(pop3c->state != POP3_STOP) {
|
|
result = Curl_pp_easy_statemach(pp);
|
|
if(result)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Allocate and initialize the POP3 struct for the current SessionHandle if
|
|
required */
|
|
static CURLcode pop3_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
|
|
if(!pop3) {
|
|
pop3 = data->state.proto.pop3 = calloc(sizeof(struct FTP), 1);
|
|
if(!pop3)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
/* Get some initial data into the pop3 struct */
|
|
pop3->bytecountp = &data->req.bytecount;
|
|
|
|
/* No need to duplicate user+password, the connectdata struct won't change
|
|
during a session, but we re-init them here since on subsequent inits
|
|
since the conn struct may have changed or been replaced.
|
|
*/
|
|
pop3->user = conn->user;
|
|
pop3->passwd = conn->passwd;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_connect()
|
|
*
|
|
* This function should do everything that is to be considered a part of the
|
|
* connection phase.
|
|
*
|
|
* The variable 'done' points to will be TRUE if the protocol-layer connect
|
|
* phase is done when this function returns, or FALSE is not. When called as
|
|
* a part of the easy interface, it will always be TRUE.
|
|
*/
|
|
static CURLcode pop3_connect(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode result;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct SessionHandle *data = conn->data;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
|
|
*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);
|
|
|
|
result = pop3_init(conn);
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
|
|
/* We always support persistent connections on pop3 */
|
|
conn->bits.close = FALSE;
|
|
|
|
pp->response_time = RESP_TIMEOUT; /* set default response time-out */
|
|
pp->statemach_act = pop3_statemach_act;
|
|
pp->endofresp = pop3_endofresp;
|
|
pp->conn = conn;
|
|
|
|
if(conn->handler->flags & PROTOPT_SSL) {
|
|
/* BLOCKING */
|
|
result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
Curl_pp_init(pp); /* init the response reader stuff */
|
|
|
|
/* When we connect, we start in the state where we await the server greet
|
|
response */
|
|
state(conn, POP3_SERVERGREET);
|
|
|
|
if(data->state.used_interface == Curl_if_multi)
|
|
result = pop3_multi_statemach(conn, done);
|
|
else {
|
|
result = pop3_easy_statemach(conn);
|
|
if(!result)
|
|
*done = TRUE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_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 pop3_done(struct connectdata *conn, CURLcode status,
|
|
bool premature)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
(void)premature;
|
|
|
|
if(!pop3)
|
|
/* When the easy handle is removed from the multi while libcurl is still
|
|
* trying to resolve the host name, it seems that the pop3 struct is not
|
|
* yet initialized, but the removal action calls Curl_done() which calls
|
|
* this function. So we simply return success if no pop3 pointer is set.
|
|
*/
|
|
return CURLE_OK;
|
|
|
|
if(status) {
|
|
conn->bits.close = TRUE; /* marked for closure */
|
|
result = status; /* use the already set error code */
|
|
}
|
|
|
|
/* Cleanup our do based variables */
|
|
Curl_safefree(pop3c->mailbox);
|
|
Curl_safefree(pop3c->custom);
|
|
|
|
/* Clear the transfer mode for the next connection */
|
|
pop3->transfer = FTPTRANSFER_BODY;
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_perform()
|
|
*
|
|
* This is the actual DO function for POP3. Get a file/directory according to
|
|
* the options previously setup.
|
|
*/
|
|
static CURLcode pop3_perform(struct connectdata *conn, bool *connected,
|
|
bool *dophase_done)
|
|
{
|
|
/* This is POP3 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 FTP *pop3 = conn->data->state.proto.pop3;
|
|
pop3->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
|
|
*dophase_done = FALSE; /* not done yet */
|
|
|
|
/* Start the first command in the DO phase */
|
|
result = pop3_command(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* Run the state-machine */
|
|
if(conn->data->state.used_interface == Curl_if_multi)
|
|
result = pop3_multi_statemach(conn, dophase_done);
|
|
else {
|
|
result = pop3_easy_statemach(conn);
|
|
*dophase_done = TRUE; /* with the easy interface we are done here */
|
|
}
|
|
*connected = conn->bits.tcpconnect[FIRSTSOCKET];
|
|
|
|
if(*dophase_done)
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_do()
|
|
*
|
|
* This function is registered as 'curl_do' function. It decodes the path
|
|
* parts etc as a wrapper to the actual DO function (pop3_perform).
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*/
|
|
static CURLcode pop3_do(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode retcode = CURLE_OK;
|
|
|
|
*done = FALSE; /* default to false */
|
|
|
|
/*
|
|
Since connections can be re-used between SessionHandles, this might be a
|
|
connection already existing but on a fresh SessionHandle struct so we must
|
|
make sure we have a good 'struct POP3' to play with. For new connections,
|
|
the struct POP3 is allocated and setup in the pop3_connect() function.
|
|
*/
|
|
Curl_reset_reqproto(conn);
|
|
retcode = pop3_init(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
/* Parse the URL path */
|
|
retcode = pop3_parse_url_path(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
/* Parse the custom request */
|
|
retcode = pop3_parse_custom_request(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = pop3_regular_transfer(conn, done);
|
|
|
|
return retcode;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_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 pop3_quit(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "QUIT", NULL);
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, POP3_QUIT);
|
|
|
|
result = pop3_easy_statemach(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_disconnect()
|
|
*
|
|
* Disconnect from an POP3 server. Cleanup protocol-specific per-connection
|
|
* resources. BLOCKING.
|
|
*/
|
|
static CURLcode pop3_disconnect(struct connectdata *conn,
|
|
bool dead_connection)
|
|
{
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
|
|
/* 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 POP3 session may or may not have been allocated/setup at this
|
|
point! */
|
|
if(!dead_connection && pop3c->pp.conn)
|
|
(void)pop3_quit(conn); /* ignore errors on the LOGOUT */
|
|
|
|
/* Disconnect from the server */
|
|
Curl_pp_disconnect(&pop3c->pp);
|
|
|
|
/* Cleanup the SASL module */
|
|
Curl_sasl_cleanup(conn, pop3c->authused);
|
|
|
|
/* Cleanup our connection based variables */
|
|
Curl_safefree(pop3c->apoptimestamp);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_parse_url_path()
|
|
*
|
|
* Parse the URL path into separate path components.
|
|
*/
|
|
static CURLcode pop3_parse_url_path(struct connectdata *conn)
|
|
{
|
|
/* The POP3 struct is already initialised in pop3_connect() */
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct SessionHandle *data = conn->data;
|
|
const char *path = data->state.path;
|
|
|
|
/* URL decode the path and use this mailbox */
|
|
return Curl_urldecode(data, path, 0, &pop3c->mailbox, NULL, TRUE);
|
|
}
|
|
|
|
static CURLcode pop3_parse_custom_request(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct SessionHandle *data = conn->data;
|
|
const char *custom = conn->data->set.str[STRING_CUSTOMREQUEST];
|
|
|
|
/* URL decode the custom request */
|
|
if(custom)
|
|
result = Curl_urldecode(data, custom, 0, &pop3c->custom, NULL, TRUE);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Call this when the DO phase has completed */
|
|
static CURLcode pop3_dophase_done(struct connectdata *conn, bool connected)
|
|
{
|
|
struct FTP *pop3 = conn->data->state.proto.pop3;
|
|
|
|
(void)connected;
|
|
|
|
if(pop3->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 pop3_doing(struct connectdata *conn, bool *dophase_done)
|
|
{
|
|
CURLcode result;
|
|
result = pop3_multi_statemach(conn, dophase_done);
|
|
|
|
if(!result && *dophase_done) {
|
|
result = pop3_dophase_done(conn, FALSE /* not connected */);
|
|
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_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 pop3_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 = pop3_perform(conn, &connected, dophase_done);
|
|
|
|
if(CURLE_OK == result) {
|
|
|
|
if(!*dophase_done)
|
|
/* The DO phase has not completed yet */
|
|
return CURLE_OK;
|
|
|
|
result = pop3_dophase_done(conn, connected);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_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 pop3 operations through the proxy, we
|
|
switch and use HTTP operations only */
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->handler == &Curl_handler_pop3)
|
|
conn->handler = &Curl_handler_pop3_proxy;
|
|
else {
|
|
#ifdef USE_SSL
|
|
conn->handler = &Curl_handler_pop3s_proxy;
|
|
#else
|
|
failf(data, "POP3S not supported!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
/* We explicitly mark this connection as persistent here as we're doing
|
|
POP3 over HTTP and thus we accidentally avoid setting this value
|
|
otherwise */
|
|
conn->bits.close = FALSE;
|
|
#else
|
|
failf(data, "POP3 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;
|
|
}
|
|
|
|
/* This function scans the body after the end-of-body and writes everything
|
|
until the end is found */
|
|
CURLcode Curl_pop3_write(struct connectdata *conn, char *str, size_t nread)
|
|
{
|
|
/* This code could be made into a special function in the handler struct */
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SingleRequest *k = &data->req;
|
|
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
bool strip_dot = FALSE;
|
|
size_t last = 0;
|
|
size_t i;
|
|
|
|
/* Search through the buffer looking for the end-of-body marker which is
|
|
5 bytes (0d 0a 2e 0d 0a). Note that a line starting with a dot matches
|
|
the eob so the server will have prefixed it with an extra dot which we
|
|
need to strip out. Additionally the marker could of course be spread out
|
|
over 5 different data chunks */
|
|
for(i = 0; i < nread; i++) {
|
|
size_t prev = pop3c->eob;
|
|
|
|
switch(str[i]) {
|
|
case 0x0d:
|
|
if(pop3c->eob == 0) {
|
|
pop3c->eob++;
|
|
|
|
if(i) {
|
|
/* Write out the body part that didn't match */
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, &str[last],
|
|
i - last);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
last = i;
|
|
}
|
|
}
|
|
else if(pop3c->eob == 3)
|
|
pop3c->eob++;
|
|
else
|
|
/* If the character match wasn't at position 0 or 3 then restart the
|
|
pattern matching */
|
|
pop3c->eob = 1;
|
|
break;
|
|
|
|
case 0x0a:
|
|
if(pop3c->eob == 1 || pop3c->eob == 4)
|
|
pop3c->eob++;
|
|
else
|
|
/* If the character match wasn't at position 1 or 4 then start the
|
|
search again */
|
|
pop3c->eob = 0;
|
|
break;
|
|
|
|
case 0x2e:
|
|
if(pop3c->eob == 2)
|
|
pop3c->eob++;
|
|
else if(pop3c->eob == 3) {
|
|
/* We have an extra dot after the CRLF which we need to strip off */
|
|
strip_dot = TRUE;
|
|
pop3c->eob = 0;
|
|
}
|
|
else
|
|
/* If the character match wasn't at position 2 then start the search
|
|
again */
|
|
pop3c->eob = 0;
|
|
break;
|
|
|
|
default:
|
|
pop3c->eob = 0;
|
|
break;
|
|
}
|
|
|
|
/* Did we have a partial match which has subsequently failed? */
|
|
if(prev && prev >= pop3c->eob) {
|
|
/* Strip can only be non-zero for the very first mismatch after CRLF
|
|
and then both prev and strip are equal and nothing will be output
|
|
below */
|
|
while(prev && pop3c->strip) {
|
|
prev--;
|
|
pop3c->strip--;
|
|
}
|
|
|
|
if(prev) {
|
|
/* If the partial match was the CRLF and dot then only write the CRLF
|
|
as the server would have inserted the dot */
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char*)POP3_EOB,
|
|
strip_dot ? prev - 1 : prev);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
last = i;
|
|
strip_dot = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(pop3c->eob == POP3_EOB_LEN) {
|
|
/* We have a full match so the transfer is done, however we must transfer
|
|
the CRLF at the start of the EOB as this is considered to be part of the
|
|
message as per RFC-1939, sect. 3 */
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)POP3_EOB, 2);
|
|
|
|
k->keepon &= ~KEEP_RECV;
|
|
pop3c->eob = 0;
|
|
|
|
return result;
|
|
}
|
|
|
|
if(pop3c->eob)
|
|
/* While EOB is matching nothing should be output */
|
|
return CURLE_OK;
|
|
|
|
if(nread - last) {
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, &str[last],
|
|
nread - last);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* CURL_DISABLE_POP3 */
|