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/* client.c --- SASL mechanism SECURID from RFC 2808, client side.
* Copyright (C) 2002-2025 Simon Josefsson
*
* This file is part of GNU SASL Library.
*
* GNU SASL Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* GNU SASL Library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GNU SASL Library; if not, see
* <https://www.gnu.org/licenses/>.
*
*/
#include <config.h>
/* Get specification. */
#include "securid.h"
/* Get malloc, free. */
#include <stdlib.h>
/* Get strdup, strlen. */
#include <string.h>
#define PASSCODE "passcode"
#define PIN "pin"
int
_gsasl_securid_client_start (Gsasl_session *sctx _GL_UNUSED, void **mech_data)
{
int *step;
step = (int *) malloc (sizeof (*step));
if (step == NULL)
return GSASL_MALLOC_ERROR;
*step = 0;
*mech_data = step;
return GSASL_OK;
}
int
_gsasl_securid_client_step (Gsasl_session *sctx,
void *mech_data,
const char *input,
size_t input_len,
char **output, size_t *output_len)
{
int *step = mech_data;
const char *authzid = NULL, *authid = NULL, *passcode = NULL, *pin = NULL;
size_t authzidlen, authidlen, passcodelen, pinlen = 0;
int do_pin = 0;
int res;
switch (*step)
{
case 1:
if (input_len == strlen (PASSCODE) &&
memcmp (input, PASSCODE, strlen (PASSCODE)) == 0)
{
*step = 0;
}
else if (input_len >= strlen (PIN) &&
memcmp (input, PIN, strlen (PIN)) == 0)
{
do_pin = 1;
*step = 0;
}
else
{
*output_len = 0;
res = GSASL_OK;
break;
}
/* fall through */
case 0:
authzid = gsasl_property_get (sctx, GSASL_AUTHZID);
if (authzid)
authzidlen = strlen (authzid);
else
authzidlen = 0;
authid = gsasl_property_get (sctx, GSASL_AUTHID);
if (!authid)
return GSASL_NO_AUTHID;
authidlen = strlen (authid);
passcode = gsasl_property_get (sctx, GSASL_PASSCODE);
if (!passcode)
return GSASL_NO_PASSCODE;
passcodelen = strlen (passcode);
if (do_pin)
{
if (input_len > strlen (PIN))
{
res = gsasl_property_set_raw (sctx, GSASL_SUGGESTED_PIN,
&input[strlen (PIN)],
input_len - strlen (PIN));
if (res != GSASL_OK)
return res;
}
pin = gsasl_property_get (sctx, GSASL_PIN);
if (!pin)
return GSASL_NO_PIN;
pinlen = strlen (pin);
}
*output_len = authzidlen + 1 + authidlen + 1 + passcodelen + 1;
if (do_pin)
*output_len += pinlen + 1;
*output = malloc (*output_len);
if (*output == NULL)
return GSASL_MALLOC_ERROR;
if (authzid)
memcpy (*output, authzid, authzidlen);
(*output)[authzidlen] = '\0';
memcpy (*output + authzidlen + 1, authid, authidlen);
(*output)[authzidlen + 1 + authidlen] = '\0';
memcpy (*output + authzidlen + 1 + authidlen + 1, passcode,
passcodelen);
(*output)[authzidlen + 1 + authidlen + 1 + passcodelen] = '\0';
if (do_pin)
{
memcpy (*output + authzidlen + 1 + authidlen + 1 + passcodelen + 1,
pin, pinlen);
(*output)[authzidlen + 1 + authidlen + 1 + passcodelen + 1 +
pinlen] = '\0';
}
(*step)++;
res = GSASL_OK;
break;
case 2:
*output_len = 0;
*output = NULL;
(*step)++;
res = GSASL_OK;
break;
default:
res = GSASL_MECHANISM_CALLED_TOO_MANY_TIMES;
break;
}
return res;
}
void
_gsasl_securid_client_finish (Gsasl_session *sctx _GL_UNUSED, void *mech_data)
{
int *step = mech_data;
free (step);
}
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