jcs.org
mutt stable branch with some hacks
1/*
2 * Copyright (C) 1996-1998 Michael R. Elkins <me@mutt.org>
3 * Copyright (C) 1996-1999 Brandon Long <blong@fiction.net>
4 * Copyright (C) 1999-2001 Brendan Cully <brendan@kublai.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20
21/* IMAP login/authentication code */
22
23#if HAVE_CONFIG_H
24# include "config.h"
25#endif
26
27#include "mutt.h"
28#include "imap_private.h"
29#include "auth.h"
30
31static const imap_auth_t imap_authenticators[] = {
32 { imap_auth_oauth, "oauthbearer" },
33#ifdef USE_SASL
34 { imap_auth_sasl, NULL },
35#else
36 { imap_auth_anon, "anonymous" },
37#endif
38#ifdef USE_GSS
39 { imap_auth_gss, "gssapi" },
40#endif
41 /* SASL includes CRAM-MD5 (and GSSAPI, but that's not enabled by default) */
42#ifndef USE_SASL
43 { imap_auth_cram_md5, "cram-md5" },
44#endif
45 { imap_auth_login, "login" },
46
47 { NULL, NULL }
48};
49
50/* imap_authenticate: Attempt to authenticate using either user-specified
51 * authentication method if specified, or any. */
52int imap_authenticate (IMAP_DATA* idata)
53{
54 const imap_auth_t* authenticator;
55 char* methods;
56 char* method;
57 char* delim;
58 int r = -1;
59
60 if (ImapAuthenticators)
61 {
62 /* Try user-specified list of authentication methods */
63 methods = safe_strdup (ImapAuthenticators);
64
65 for (method = methods; method; method = delim)
66 {
67 delim = strchr (method, ':');
68 if (delim)
69 *delim++ = '\0';
70 if (! method[0])
71 continue;
72
73 dprint (2, (debugfile, "imap_authenticate: Trying method %s\n", method));
74 authenticator = imap_authenticators;
75
76 while (authenticator->authenticate)
77 {
78 if (!authenticator->method ||
79 !ascii_strcasecmp (authenticator->method, method))
80 if ((r = authenticator->authenticate (idata, method)) !=
81 IMAP_AUTH_UNAVAIL)
82 {
83 FREE (&methods);
84 return r;
85 }
86
87 authenticator++;
88 }
89 }
90
91 FREE (&methods);
92 }
93 else
94 {
95 /* Fall back to default: any authenticator */
96 dprint (2, (debugfile, "imap_authenticate: Using any available method.\n"));
97 authenticator = imap_authenticators;
98
99 while (authenticator->authenticate)
100 {
101 if ((r = authenticator->authenticate (idata, NULL)) != IMAP_AUTH_UNAVAIL)
102 return r;
103 authenticator++;
104 }
105 }
106
107 if (r == IMAP_AUTH_UNAVAIL)
108 {
109 mutt_error (_("No authenticators available"));
110 mutt_sleep (1);
111 }
112
113 return r;
114}