authenticate.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2005-2008, 2010-2012, 2014-2016 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, see <http://www.gnu.org/licenses/>. */
#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 = mu_alloc (sizeof (*p));
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_set_destroy_item (imap_auth_list, mu_list_free_item);
}
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;
io_sendf (" AUTH=%s", p->name);
return 0;
}
static int
_auth_try (void *item, void *data)
{
struct imap_auth *p = item;
struct imap4d_auth *ap = data;
if (strcmp (p->name, ap->auth_type) == 0)
{
int res = p->handler (ap);
if (res)
return res;
}
return 0;
}
void
imap4d_auth_capability (struct imap4d_session *session)
{
if (session->tls_mode != tls_required)
mu_list_foreach (imap_auth_list, _auth_capa, NULL);
}
/*
6.2.1. AUTHENTICATE Command
Arguments: authentication mechanism name
*/
int
imap4d_authenticate (struct imap4d_session *session,
struct imap4d_command *command, imap4d_tokbuf_t tok)
{
char *auth_type;
struct imap4d_auth adata;
enum imap4d_auth_result res;
if (imap4d_tokbuf_argc (tok) != 3)
return io_completion_response (command, RESP_BAD, "Invalid arguments");
auth_type = imap4d_tokbuf_getarg (tok, IMAP4_ARG_1);
if (session->tls_mode == tls_required)
return io_completion_response (command, RESP_NO,
"Command disabled: Use STARTTLS first");
adata.command = command;
adata.auth_type = auth_type;
adata.username = NULL;
res = mu_list_foreach (imap_auth_list, _auth_try, &adata);
switch (res)
{
case imap4d_auth_nosup:
return io_completion_response (command, RESP_NO,
"Authentication mechanism not supported");
case imap4d_auth_ok:
return 0;
case imap4d_auth_resp:
if (adata.response == RESP_OK && adata.username)
{
if (imap4d_session_setup (adata.username))
return io_completion_response (command, RESP_NO,
"User name or passwd rejected");
else
return io_completion_response (command, RESP_OK,
"%s authentication successful",
auth_type);
}
/* fall through */
case imap4d_auth_fail:
adata.response = RESP_NO;
break;
}
return io_completion_response (command, adata.response,
"%s authentication failed", auth_type);
}