1/* server.c --- EXTERNAL mechanism as defined in RFC 2222, server side.
2 * Copyright (C) 2002-2012 Simon Josefsson
3 *
4 * This file is part of GNU SASL Library.
5 *
6 * GNU SASL Library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * GNU SASL Library 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 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with GNU SASL Library; if not, write to the Free
18 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27/* Get specification. */
28#include "external.h"
29
30/* Get memchr. */
31#include <string.h>
32
33int
34_gsasl_external_server_step (Gsasl_session * sctx,
35 void *mech_data,
36 const char *input, size_t input_len,
37 char **output, size_t * output_len)
38{
39 *output_len = 0;
40 *output = NULL;
41
42 if (!input)
43 return GSASL_NEEDS_MORE;
44
45 /* Quoting rfc2222bis-09:
46 * extern-resp = *( UTF8-char-no-nul )
47 * UTF8-char-no-nul = UTF8-1-no-nul / UTF8-2 / UTF8-3 / UTF8-4
48 * UTF8-1-no-nul = %x01-7F */
49 if (memchr (input, '\0', input_len))
50 return GSASL_MECHANISM_PARSE_ERROR;
51
52 /* FIXME: Validate that input is UTF-8. */
53
54 if (input_len > 0)
55 gsasl_property_set_raw (sctx, GSASL_AUTHZID, input, input_len);
56 else
57 gsasl_property_set (sctx, GSASL_AUTHZID, NULL);
58
59 return gsasl_callback (NULL, sctx, GSASL_VALIDATE_EXTERNAL);
60}
61