1 /* client.c --- SASL mechanism PLAIN as defined in RFC 2595, client side.
2 * Copyright (C) 2002-2021 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 "plain.h"
29
30 /* Get memcpy, strdup, strlen. */
31 #include <string.h>
32
33 /* Get malloc, free. */
34 #include <stdlib.h>
35
36 int
_gsasl_plain_client_step(Gsasl_session * sctx,void * mech_data _GL_UNUSED,const char * input _GL_UNUSED,size_t input_len _GL_UNUSED,char ** output,size_t * output_len)37 _gsasl_plain_client_step (Gsasl_session * sctx,
38 void *mech_data _GL_UNUSED,
39 const char *input _GL_UNUSED,
40 size_t input_len _GL_UNUSED,
41 char **output, size_t *output_len)
42 {
43 const char *authzid = gsasl_property_get (sctx, GSASL_AUTHZID);
44 const char *authid = gsasl_property_get (sctx, GSASL_AUTHID);
45 const char *password = gsasl_property_get (sctx, GSASL_PASSWORD);
46 size_t authzidlen = 0, authidlen = 0, passwordlen = 0;
47 char *out;
48
49 if (authzid)
50 authzidlen = strlen (authzid);
51
52 if (authid)
53 authidlen = strlen (authid);
54 else
55 return GSASL_NO_AUTHID;
56
57 if (password)
58 passwordlen = strlen (password);
59 else
60 return GSASL_NO_PASSWORD;
61
62 *output_len = authzidlen + 1 + authidlen + 1 + passwordlen;
63 *output = out = malloc (*output_len);
64 if (!out)
65 return GSASL_MALLOC_ERROR;
66
67 if (authzid)
68 {
69 memcpy (out, authzid, authzidlen);
70 out += authzidlen;
71 }
72
73 *out++ = '\0';
74
75 memcpy (out, authid, authidlen);
76 out += authidlen;
77
78 *out++ = '\0';
79
80 memcpy (out, password, passwordlen);
81
82 return GSASL_OK;
83 }
84