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 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 <pthread.h>
  28 #include <string.h>
  29 #include <time.h>
  30
  31 #include "camel-sasl-popb4smtp.h"
  32 #include "camel-service.h"
  33 #include "camel-session.h"
  34
  35 CamelServiceAuthType camel_sasl_popb4smtp_authtype = {
  36         N_("POP before SMTP"),
  37
  38         N_("This option will authorise a POP connection before attempting SMTP"),
  39
  40         "POPB4SMTP",
  41         FALSE,
  42 };
  43
  44 /* last time the pop was accessed (through the auth method anyway), *time_t */
  45 static GHashTable *poplast;
  46
  47 /* use 1 hour as our pop timeout */
  48 #define POPB4SMTP_TIMEOUT (60*60)
  49
  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
  54 static CamelSaslClass *parent_class = NULL;
  55
  56 /* Returns the class for a CamelSaslPOPB4SMTP */
  57 #define CSP_CLASS(so) CAMEL_SASL_POPB4SMTP_CLASS (CAMEL_OBJECT_GET_CLASS (so))
  58
  59 static GByteArray *popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex);
  60
  61 static void
  62 camel_sasl_popb4smtp_class_init (CamelSaslPOPB4SMTPClass *camel_sasl_popb4smtp_class)
  63 {
  64         CamelSaslClass *camel_sasl_class = CAMEL_SASL_CLASS (camel_sasl_popb4smtp_class);
  65
  66         parent_class = CAMEL_SASL_CLASS (camel_type_get_global_classfuncs (camel_sasl_get_type ()));
  67
  68         /* virtual method overload */
  69         camel_sasl_class->challenge = popb4smtp_challenge;
  70
  71         poplast = g_hash_table_new(g_str_hash, g_str_equal);
  72 }
  73
  74 CamelType
  75 camel_sasl_popb4smtp_get_type (void)
  76 {
  77         static CamelType type = CAMEL_INVALID_TYPE;
  78
  79         if (type == CAMEL_INVALID_TYPE) {
  80                 type = camel_type_register (camel_sasl_get_type (),
  81                                             "CamelSaslPOPB4SMTP",
  82                                             sizeof (CamelSaslPOPB4SMTP),
  83                                             sizeof (CamelSaslPOPB4SMTPClass),
  84                                             (CamelObjectClassInitFunc) camel_sasl_popb4smtp_class_init,
  85                                             NULL,
  86                                             NULL,
  87                                             NULL);
  88         }
  89
  90         return type;
  91 }
  92
  93 static GByteArray *
  94 popb4smtp_challenge (CamelSasl *sasl, GByteArray *token, CamelException *ex)
  95 {
  96         char *popuri;
  97         CamelSession *session = sasl->service->session;
  98         CamelStore *store;
  99         time_t now, *timep;
 100
 101         sasl->authenticated = FALSE;
 102
 103         popuri = camel_session_get_password (session, _("POP Source URI"), FALSE, FALSE,
 104                                              sasl->service, "popb4smtp_uri", ex);
 105
 106         if (popuri == NULL) {
 107                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using an unknown transport"));
 108                 return NULL;
 109         }
 110
 111         if (strncasecmp(popuri, "pop:", 4) != 0) {
 112                 camel_exception_setv(ex, 1, _("POP Before SMTP auth using a non-pop source"));
 113                 return NULL;
 114         }
 115
 116         /* check if we've done it before recently in this session */
 117         now = time(0);
 118
 119         /* need to lock around the whole thing until finished with timep */
 120
 121         POPB4SMTP_LOCK(lock);
 122         timep = g_hash_table_lookup(poplast, popuri);
 123         if (timep) {
 124                 if ((*timep + POPB4SMTP_TIMEOUT) > now) {
 125                         sasl->authenticated = TRUE;
 126                         POPB4SMTP_UNLOCK(lock);
 127                         g_free(popuri);
 128                         return NULL;
 129                 }
 130         } else {
 131                 timep = g_malloc0(sizeof(*timep));
 132                 g_hash_table_insert(poplast, g_strdup(popuri), timep);
 133         }
 134
 135         /* connect to pop session */
 136         store = camel_session_get_store(session, popuri, ex);
 137         if (store) {
 138                 sasl->authenticated = TRUE;
 139                 camel_object_unref((CamelObject *)store);
 140                 *timep = now;
 141         } else {
 142                 sasl->authenticated = FALSE;
 143                 *timep = 0;
 144         }
 145
 146         POPB4SMTP_UNLOCK(lock);
 147
 148         g_free(popuri);
 149
 150         return NULL;
 151 }