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/* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
/* Balsa E-Mail Client
* Copyright (C) 1997-2016 Stuart Parmenter and others,
* See the file AUTHORS for a list
*
* Copyright (C) 1999-2016 Brendan Cully <brendan@kublai.com>
*
* 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, see <https://www.gnu.org/licenses/>.
*/
/* IMAP login/authentication code */
#include <string.h>
#include <glib/gi18n.h>
#include "imap-auth.h"
#include "net-client-utils.h"
#include "imap_private.h"
/* imap_auth_cram_md5: AUTH=CRAM-MD5 support. */
ImapResult
imap_auth_cram(ImapMboxHandle* handle)
{
gchar *challenge;
gchar *auth_buf;
unsigned cmdno;
int rc;
gchar **auth_data;
if (!imap_mbox_handle_can_do(handle, IMCAP_ACRAM_MD5))
return IMAP_AUTH_UNAVAIL;
g_signal_emit_by_name(handle->sio, "auth", NET_CLIENT_AUTH_USER_PASS, &auth_data);
if((auth_data == NULL) || (auth_data[0] == NULL) || (auth_data[1] == NULL)) {
imap_mbox_handle_set_msg(handle, _("Authentication cancelled"));
g_strfreev(auth_data);
return IMAP_AUTH_CANCELLED;
}
/* start the interaction */
if(imap_cmd_start(handle, "AUTHENTICATE CRAM-MD5", &cmdno) <0)
return IMAP_AUTH_FAILURE;
/* From RFC 2195:
* The data encoded in the first ready response contains a presumptively
* arbitrary string of random digits, a timestamp, and the fully-qualified
* primary host name of the server. The syntax of the unencoded form must
* correspond to that of an RFC 822 'msg-id' [RFC822] as described in [POP3].
*/
rc = imap_cmd_process_untagged(handle, cmdno);
if (rc != IMR_RESPOND) {
g_warning("cram-md5: unexpected response: %d", rc);
return IMAP_AUTH_FAILURE;
}
challenge = net_client_siobuf_get_line(handle->sio, NULL);
if (challenge != NULL) {
auth_buf = net_client_cram_calc(challenge, G_CHECKSUM_MD5, auth_data[0], auth_data[1]);
} else {
auth_buf = NULL;
}
g_free(challenge);
net_client_free_authstr(auth_data[0]);
net_client_free_authstr(auth_data[1]);
g_free(auth_data);
if (auth_buf == NULL) {
return IMAP_AUTH_FAILURE;
}
net_client_write_line(NET_CLIENT(handle->sio), "%s", NULL, auth_buf);
net_client_free_authstr(auth_buf);
rc = imap_cmd_process_untagged(handle, cmdno);
return rc == IMR_OK ? IMAP_SUCCESS : IMAP_AUTH_FAILURE;
}
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