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/*
* Copyright (C) 1999-2001,2005 Brendan Cully <brendan@kublai.com>
* Copyright (C) 2018 Brandon Long <blong@fiction.net>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* IMAP login/authentication code */
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "imap_private.h"
#include "auth.h"
/* imap_auth_oauth: AUTH=OAUTHBEARER support. See RFC 7628 */
static imap_auth_res_t imap_auth_oauth (IMAP_DATA* idata, int xoauth2)
{
int rc = IMAP_AUTH_FAILURE, steprc;
BUFFER *bearertoken = NULL, *authline = NULL;
const char *authtype;
authtype = xoauth2 ? "XOAUTH2" : "OAUTHBEARER";
mutt_message (_("Authenticating (%s)..."), authtype);
bearertoken = mutt_buffer_pool_get ();
authline = mutt_buffer_pool_get ();
/* We get the access token from the imap_oauth_refresh_command */
if (mutt_account_getoauthbearer (&idata->conn->account, bearertoken, xoauth2))
goto cleanup;
mutt_buffer_printf (authline, "AUTHENTICATE %s %s",
authtype, mutt_b2s (bearertoken));
/* This doesn't really contain a password, but the token is good for
* an hour, so suppress it anyways.
*/
if (imap_exec (idata, mutt_b2s (authline), IMAP_CMD_FAIL_OK | IMAP_CMD_PASS))
{
/* The error response was in SASL continuation, so continue the SASL
* to cause a failure and exit SASL input. See RFC 7628 3.2.3
* "AQ==" is Base64 encoded ^A (0x01) .
*/
mutt_socket_write (idata->conn, "AQ==\r\n");
do
steprc = imap_cmd_step (idata);
while (steprc == IMAP_CMD_CONTINUE);
/* L10N:
%s is the authentication type, for example OAUTHBEARER
*/
mutt_error (_("%s authentication failed."), authtype);
mutt_sleep (2);
goto cleanup;
}
mutt_clear_error();
rc = IMAP_AUTH_SUCCESS;
cleanup:
mutt_buffer_pool_release (&bearertoken);
mutt_buffer_pool_release (&authline);
return rc;
}
/* AUTH=OAUTHBEARER support. See RFC 7628 */
imap_auth_res_t imap_auth_oauthbearer (IMAP_DATA* idata, const char* method)
{
/* For now, we only support SASL_IR also and over TLS */
if (!mutt_bit_isset (idata->capabilities, SASL_IR) ||
!idata->conn->ssf)
return IMAP_AUTH_UNAVAIL;
if (!mutt_bit_isset (idata->capabilities, AUTH_OAUTHBEARER))
return IMAP_AUTH_UNAVAIL;
if (!ImapOauthRefreshCmd)
return IMAP_AUTH_UNAVAIL;
return imap_auth_oauth (idata, 0);
}
/* AUTH=XOAUTH2 support. */
imap_auth_res_t imap_auth_xoauth2 (IMAP_DATA* idata, const char* method)
{
/* For now, we only support SASL_IR also and over TLS */
if (!mutt_bit_isset (idata->capabilities, SASL_IR) ||
!idata->conn->ssf)
return IMAP_AUTH_UNAVAIL;
if (!mutt_bit_isset (idata->capabilities, AUTH_XOAUTH2))
return IMAP_AUTH_UNAVAIL;
/* If they did not explicitly request XOAUTH2 then fail quietly */
if (!(method && ImapOauthRefreshCmd))
return IMAP_AUTH_UNAVAIL;
return imap_auth_oauth (idata, 1);
}
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