authenticate.c
3.61 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2005, 2006, 2007 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "imap4d.h"
struct imap_auth {
char *name;
imap4d_auth_handler_fp handler;
};
static mu_list_t imap_auth_list;
static int
comp (const void *item, const void *data)
{
const struct imap_auth *p = item;
return strcmp (p->name, (const char*) data);
}
void
auth_add (char *name, imap4d_auth_handler_fp handler)
{
struct imap_auth *p = malloc (sizeof (*p));
if (!p)
imap4d_bye (ERR_NO_MEM);
p->name = name;
p->handler = handler;
if (!imap_auth_list)
{
mu_list_create (&imap_auth_list);
mu_list_set_comparator (imap_auth_list, comp);
}
mu_list_append (imap_auth_list, (void*)p);
}
void
auth_remove (char *name)
{
mu_list_remove (imap_auth_list, (void*) name);
}
static int
_auth_capa (void *item, void *usused)
{
struct imap_auth *p = item;
util_send(" AUTH=%s", p->name);
return 0;
}
struct auth_data {
struct imap4d_command *command;
char *auth_type;
char *arg;
char *username;
int result;
};
static int
_auth_try (void *item, void *data)
{
struct imap_auth *p = item;
struct auth_data *ap = data;
if (strcmp (p->name, ap->auth_type) == 0)
{
ap->result = p->handler (ap->command,
ap->auth_type, ap->arg, &ap->username);
return 1;
}
return 0;
}
void
imap4d_auth_capability ()
{
mu_list_do (imap_auth_list, _auth_capa, NULL);
}
int
imap4d_authenticate (struct imap4d_command *command, char *arg)
{
char *sp = NULL;
char *auth_type;
struct auth_data adata;
auth_type = util_getword (arg, &sp);
util_unquote (&auth_type);
if (!auth_type)
return util_finish (command, RESP_BAD, "Too few arguments");
if (tls_required)
return util_finish (command, RESP_NO, "Command disabled: Use STARTTLS first");
adata.command = command;
adata.auth_type = auth_type;
adata.arg = sp;
adata.username = NULL;
if (mu_list_do (imap_auth_list, _auth_try, &adata) == 0)
return util_finish (command, RESP_NO,
"Authentication mechanism not supported");
if (adata.result == RESP_OK && adata.username)
{
auth_data = mu_get_auth_by_name (adata.username);
if (auth_data == NULL)
return util_finish (command, RESP_NO,
"User name or passwd rejected");
homedir = mu_normalize_path (strdup (auth_data->dir), "/");
if (imap4d_check_home_dir (homedir, auth_data->uid, auth_data->gid))
return util_finish (command, RESP_NO,
"User name or passwd rejected");
if (auth_data->change_uid)
setuid (auth_data->uid);
util_chdir (homedir);
namespace_init (homedir);
mu_diag_output (MU_DIAG_INFO, _("User `%s' logged in"), adata.username);
return util_finish (command, RESP_OK,
"%s authentication successful", auth_type);
}
return util_finish (command, adata.result,
"%s authentication failed", auth_type);
}