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 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 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 General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <string.h>
  28 #include <time.h>
  29 #include "camel-sasl-popb4smtp.h"
  30 #include "camel-service.h"
  31 #include "camel-session.h"
  32
  33 CamelServiceAuthType camel_sasl_popb4smtp_authtype = {
  34         N_("POP before SMTP"),
  35
  36         N_("This option will authorise a POP connection before attempting SMTP"),
  37
  38         "POPB4SMTP",
  39         FALSE,
  40 };
  41
  42 /* last time the pop was accessed (through the auth method anyway), *time_t */
  43 static GHashTable *poplast;
  44
  45 /* use 1 hour as our pop timeout */
  46 #define POPB4SMTP_TIMEOUT (60*60)
  47
  48 #ifdef ENABLE_THREADS
  49 #include <pthread.h>
  50 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  51 #define POPB4SMTP_LOCK(l) pthread_mutex_lock(&l)
  52 #define POPB4SMTP_UNLOCK(l) pthread_mutex_unlock(&l)
  53 #else
  54 #define POPB4SMTP_LOCK(l)
  55 #define POPB4SMTP_UNLOCK(l)
  56 #endif
  57
  58 static CamelSaslClass *parent_class = NULL;
  59
  60 /* Returns the class for a CamelSaslPOPB4SMTP */
  61 #define CSP_CLASS(so) CAMEL_SASL_POPB4SMTP_CLASS (CAMEL_OBJECT_GET_CLASS (so))
  62
  63 static GByteArray *popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex);
  64
  65 static void
  66 camel_sasl_popb4smtp_class_init (CamelSaslPOPB4SMTPClass *camel_sasl_popb4smtp_class)
  67 {
  68         CamelSaslClass *camel_sasl_class = CAMEL_SASL_CLASS (camel_sasl_popb4smtp_class);
  69
  70         parent_class = CAMEL_SASL_CLASS (camel_type_get_global_classfuncs (camel_sasl_get_type ()));
  71
  72         /* virtual method overload */
  73         camel_sasl_class->challenge = popb4smtp_challenge;
  74
  75         poplast = g_hash_table_new(g_str_hash, g_str_equal);
  76 }
  77
  78 CamelType
  79 camel_sasl_popb4smtp_get_type (void)
  80 {
  81         static CamelType type = CAMEL_INVALID_TYPE;
  82
  83         if (type == CAMEL_INVALID_TYPE) {
  84                 type = camel_type_register (camel_sasl_get_type (),
  85                                             "CamelSaslPOPB4SMTP",
  86                                             sizeof (CamelSaslPOPB4SMTP),
  87                                             sizeof (CamelSaslPOPB4SMTPClass),
  88                                             (CamelObjectClassInitFunc) camel_sasl_popb4smtp_class_init,
  89                                             NULL,
  90                                             NULL,
  91                                             NULL);
  92         }
  93
  94         return type;
  95 }
  96
  97 static GByteArray *
  98 popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex)
  99 {
 100         char *popuri;
 101         CamelSession *session = sasl->service->session;
 102         CamelStore *store;
 103         time_t now, *timep;
 104
 105         sasl->authenticated = FALSE;
 106
 107         popuri = camel_session_get_password (session, _("POP Source URI"), FALSE, FALSE,
 108                                              sasl->service, "popb4smtp_uri", ex);
 109
 110         if (popuri == NULL) {
 111                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using an unknown transport"));
 112                 return NULL;
 113         }
 114
 115         if (strncasecmp(popuri, "pop:", 4) != 0) {
 116                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using a non-pop source"));
 117                 return NULL;
 118         }
 119
 120         /* check if we've done it before recently in this session */
 121         now = time(0);
 122
 123         /* need to lock around the whole thing until finished with timep */
 124
 125         POPB4SMTP_LOCK(lock);
 126         timep = g_hash_table_lookup(poplast, popuri);
 127         if (timep) {
 128                 if ((*timep + POPB4SMTP_TIMEOUT) > now) {
 129                         sasl->authenticated = TRUE;
 130                         POPB4SMTP_UNLOCK(lock);
 131                         g_free(popuri);
 132                         return NULL;
 133                 }
 134         } else {
 135                 timep = g_malloc0(sizeof(*timep));
 136                 g_hash_table_insert(poplast, g_strdup(popuri), timep);
 137         }
 138
 139         /* connect to pop session */
 140         store = camel_session_get_store(session, popuri, ex);
 141         if (store) {
 142                 sasl->authenticated = TRUE;
 143                 camel_object_unref((CamelObject *)store);
 144                 *timep = now;
 145         } else {
 146                 sasl->authenticated = FALSE;
 147                 *timep = 0;
 148         }
 149
 150         POPB4SMTP_UNLOCK(lock);
 151
 152         g_free(popuri);
 153
 154         return NULL;
 155 }