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/* server.c --- SASL mechanism SECURID from RFC 2808, server 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 memchr, strdup, strlen. */
#include <string.h>
#define PASSCODE "passcode"
#define PIN "pin"
int
_gsasl_securid_server_step (Gsasl_session *sctx,
void *mech_data _GL_UNUSED,
const char *input, size_t input_len,
char **output, size_t *output_len)
{
const char *authorization_id = NULL;
const char *authentication_id = NULL;
const char *passcode = NULL;
const char *suggestedpin;
char *pin = NULL;
int res;
size_t len;
if (input_len == 0)
{
*output_len = 0;
*output = NULL;
return GSASL_NEEDS_MORE;
}
authorization_id = input;
authentication_id = memchr (input, '\0', input_len - 1);
if (authentication_id)
{
authentication_id++;
passcode = memchr (authentication_id, '\0',
input_len - strlen (authorization_id) - 1 - 1);
if (passcode)
{
passcode++;
pin = memchr (passcode, '\0', input_len -
strlen (authorization_id) - 1 -
strlen (authentication_id) - 1 - 1);
if (pin)
{
pin++;
if (pin && !*pin)
pin = NULL;
}
}
}
if (passcode == NULL)
return GSASL_MECHANISM_PARSE_ERROR;
res = gsasl_property_set (sctx, GSASL_AUTHID, authentication_id);
if (res != GSASL_OK)
return res;
res = gsasl_property_set (sctx, GSASL_AUTHZID, authorization_id);
if (res != GSASL_OK)
return res;
res = gsasl_property_set (sctx, GSASL_PASSCODE, passcode);
if (res != GSASL_OK)
return res;
if (pin)
res = gsasl_property_set (sctx, GSASL_PIN, pin);
else
res = gsasl_property_set (sctx, GSASL_PIN, NULL);
if (res != GSASL_OK)
return res;
res = gsasl_callback (NULL, sctx, GSASL_VALIDATE_SECURID);
switch (res)
{
case GSASL_SECURID_SERVER_NEED_ADDITIONAL_PASSCODE:
*output = strdup (PASSCODE);
if (!*output)
return GSASL_MALLOC_ERROR;
*output_len = strlen (PASSCODE);
res = GSASL_NEEDS_MORE;
break;
case GSASL_SECURID_SERVER_NEED_NEW_PIN:
suggestedpin = gsasl_property_get (sctx, GSASL_SUGGESTED_PIN);
if (suggestedpin)
len = strlen (suggestedpin);
else
len = 0;
*output_len = strlen (PIN) + len;
*output = malloc (*output_len);
if (!*output)
return GSASL_MALLOC_ERROR;
memcpy (*output, PIN, strlen (PIN));
if (suggestedpin)
memcpy (*output + strlen (PIN), suggestedpin, len);
res = GSASL_NEEDS_MORE;
break;
default:
*output_len = 0;
*output = NULL;
break;
}
return res;
}
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