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1 #ifndef HEADER_CURL_POP3_H
2 #define HEADER_CURL_POP3_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 2009 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
11  *
12  * This software is licensed as described in the file COPYING, which
13  * you should have received as part of this distribution. The terms
14  * are also available at https://curl.haxx.se/docs/copyright.html.
15  *
16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17  * copies of the Software, and permit persons to whom the Software is
18  * furnished to do so, under the terms of the COPYING file.
19  *
20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21  * KIND, either express or implied.
22  *
23  ***************************************************************************/
24 
25 #include "pingpong.h"
26 #include "curl_sasl.h"
27 
28 /****************************************************************************
29  * POP3 unique setup
30  ***************************************************************************/
31 typedef enum {
32   POP3_STOP,         /* do nothing state, stops the state machine */
33   POP3_SERVERGREET,  /* waiting for the initial greeting immediately after
34                         a connect */
35   POP3_CAPA,
36   POP3_STARTTLS,
37   POP3_UPGRADETLS,   /* asynchronously upgrade the connection to SSL/TLS
38                        (multi mode only) */
39   POP3_AUTH,
40   POP3_APOP,
41   POP3_USER,
42   POP3_PASS,
43   POP3_COMMAND,
44   POP3_QUIT,
45   POP3_LAST          /* never used */
46 } pop3state;
47 
48 /* This POP3 struct is used in the Curl_easy. All POP3 data that is
49    connection-oriented must be in pop3_conn to properly deal with the fact that
50    perhaps the Curl_easy is changed between the times the connection is
51    used. */
52 struct POP3 {
53   curl_pp_transfer transfer;
54   char *id;               /* Message ID */
55   char *custom;           /* Custom Request */
56 };
57 
58 /* pop3_conn is used for struct connection-oriented data in the connectdata
59    struct */
60 struct pop3_conn {
61   struct pingpong pp;
62   pop3state state;        /* Always use pop3.c:state() to change state! */
63   bool ssldone;           /* Is connect() over SSL done? */
64   size_t eob;             /* Number of bytes of the EOB (End Of Body) that
65                              have been received so far */
66   size_t strip;           /* Number of bytes from the start to ignore as
67                              non-body */
68   struct SASL sasl;       /* SASL-related storage */
69   unsigned int authtypes; /* Accepted authentication types */
70   unsigned int preftype;  /* Preferred authentication type */
71   char *apoptimestamp;    /* APOP timestamp from the server greeting */
72   bool tls_supported;     /* StartTLS capability supported by server */
73 };
74 
75 extern const struct Curl_handler Curl_handler_pop3;
76 extern const struct Curl_handler Curl_handler_pop3s;
77 
78 /* Authentication type flags */
79 #define POP3_TYPE_CLEARTEXT (1 << 0)
80 #define POP3_TYPE_APOP      (1 << 1)
81 #define POP3_TYPE_SASL      (1 << 2)
82 
83 /* Authentication type values */
84 #define POP3_TYPE_NONE      0
85 #define POP3_TYPE_ANY       ~0U
86 
87 /* This is the 5-bytes End-Of-Body marker for POP3 */
88 #define POP3_EOB "\x0d\x0a\x2e\x0d\x0a"
89 #define POP3_EOB_LEN 5
90 
91 /* This function scans the body after the end-of-body and writes everything
92  * until the end is found */
93 CURLcode Curl_pop3_write(struct connectdata *conn, char *str, size_t nread);
94 
95 #endif /* HEADER_CURL_POP3_H */
96