camel/camel-sasl-popb4smtp.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  *  Authors: Michael Zucchi <notzed@ximian.com>
   4  *
   5  *  Copyright 2001-2003 Ximian, Inc. (www.ximian.com)
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of version 2 of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation.
  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 GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <pthread.h>
  28 #include <string.h>
  29 #include <time.h>
  30
  31 #include <glib.h>
  32 #include <glib/gi18n-lib.h>
  33
  34 #include "camel-sasl-popb4smtp.h"
  35 #include "camel-service.h"
  36 #include "camel-session.h"
  37
  38 CamelServiceAuthType camel_sasl_popb4smtp_authtype = {
  39         N_("POP before SMTP"),
  40
  41         N_("This option will authorise a POP connection before attempting SMTP"),
  42
  43         "POPB4SMTP",
  44         FALSE,
  45 };
  46
  47 /* last time the pop was accessed (through the auth method anyway), *time_t */
  48 static GHashTable *poplast;
  49
  50 /* use 1 hour as our pop timeout */
  51 #define POPB4SMTP_TIMEOUT (60*60)
  52
  53 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  54 #define POPB4SMTP_LOCK(l) pthread_mutex_lock(&l)
  55 #define POPB4SMTP_UNLOCK(l) pthread_mutex_unlock(&l)
  56
  57 static CamelSaslClass *parent_class = NULL;
  58
  59 /* Returns the class for a CamelSaslPOPB4SMTP */
  60 #define CSP_CLASS(so) CAMEL_SASL_POPB4SMTP_CLASS (CAMEL_OBJECT_GET_CLASS (so))
  61
  62 static GByteArray *popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex);
  63
  64 static void
  65 camel_sasl_popb4smtp_class_init (CamelSaslPOPB4SMTPClass *camel_sasl_popb4smtp_class)
  66 {
  67         CamelSaslClass *camel_sasl_class = CAMEL_SASL_CLASS (camel_sasl_popb4smtp_class);
  68
  69         parent_class = CAMEL_SASL_CLASS (camel_type_get_global_classfuncs (camel_sasl_get_type ()));
  70
  71         /* virtual method overload */
  72         camel_sasl_class->challenge = popb4smtp_challenge;
  73
  74         poplast = g_hash_table_new(g_str_hash, g_str_equal);
  75 }
  76
  77 CamelType
  78 camel_sasl_popb4smtp_get_type (void)
  79 {
  80         static CamelType type = CAMEL_INVALID_TYPE;
  81
  82         if (type == CAMEL_INVALID_TYPE) {
  83                 type = camel_type_register (camel_sasl_get_type (),
  84                                             "CamelSaslPOPB4SMTP",
  85                                             sizeof (CamelSaslPOPB4SMTP),
  86                                             sizeof (CamelSaslPOPB4SMTPClass),
  87                                             (CamelObjectClassInitFunc) camel_sasl_popb4smtp_class_init,
  88                                             NULL,
  89                                             NULL,
  90                                             NULL);
  91         }
  92
  93         return type;
  94 }
  95
  96 static GByteArray *
  97 popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex)
  98 {
  99         char *popuri;
 100         CamelSession *session = sasl->service->session;
 101         CamelStore *store;
 102         time_t now, *timep;
 103
 104         sasl->authenticated = FALSE;
 105
 106         popuri = camel_session_get_password (session, sasl->service, NULL, _("POP Source URI"), "popb4smtp_uri", 0, ex);
 107
 108         if (popuri == NULL) {
 109                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using an unknown transport"));
 110                 return NULL;
 111         }
 112
 113         if (g_ascii_strncasecmp(popuri, "pop:", 4) != 0) {
 114                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using a non-pop source"));
 115                 return NULL;
 116         }
 117
 118         /* check if we've done it before recently in this session */
 119         now = time(0);
 120
 121         /* need to lock around the whole thing until finished with timep */
 122
 123         POPB4SMTP_LOCK(lock);
 124         timep = g_hash_table_lookup(poplast, popuri);
 125         if (timep) {
 126                 if ((*timep + POPB4SMTP_TIMEOUT) > now) {
 127                         sasl->authenticated = TRUE;
 128                         POPB4SMTP_UNLOCK(lock);
 129                         g_free(popuri);
 130                         return NULL;
 131                 }
 132         } else {
 133                 timep = g_malloc0(sizeof(*timep));
 134                 g_hash_table_insert(poplast, g_strdup(popuri), timep);
 135         }
 136
 137         /* connect to pop session */
 138         store = camel_session_get_store(session, popuri, ex);
 139         if (store) {
 140                 sasl->authenticated = TRUE;
 141                 camel_object_unref((CamelObject *)store);
 142                 *timep = now;
 143         } else {
 144                 sasl->authenticated = FALSE;
 145                 *timep = 0;
 146         }
 147
 148         POPB4SMTP_UNLOCK(lock);
 149
 150         g_free(popuri);
 151
 152         return NULL;
 153 }