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/* server.c --- SAML20 mechanism, server side.
* Copyright (C) 2010-2022 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, write to the Free
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Get specification. */
#include "saml20.h"
/* Get strdup, strlen. */
#include <string.h>
/* Get free. */
#include <stdlib.h>
/* Get _gsasl_parse_gs2_header. */
#include "mechtools.h"
struct saml20_server_state
{
int step;
};
int
_gsasl_saml20_server_start (Gsasl_session * sctx _GL_UNUSED, void **mech_data)
{
struct saml20_server_state *state;
state = (struct saml20_server_state *) calloc (sizeof (*state), 1);
if (state == NULL)
return GSASL_MALLOC_ERROR;
*mech_data = state;
return GSASL_OK;
}
int
_gsasl_saml20_server_step (Gsasl_session * sctx,
void *mech_data,
const char *input, size_t input_len,
char **output, size_t *output_len)
{
struct saml20_server_state *state = mech_data;
int res = GSASL_MECHANISM_CALLED_TOO_MANY_TIMES;
*output_len = 0;
*output = NULL;
switch (state->step)
{
case 0:
{
const char *p;
char *authzid;
size_t headerlen;
if (input_len == 0)
return GSASL_NEEDS_MORE;
res = _gsasl_parse_gs2_header (input, input_len,
&authzid, &headerlen);
if (res != GSASL_OK)
return res;
if (authzid)
{
res = gsasl_property_set (sctx, GSASL_AUTHZID, authzid);
free (authzid);
if (res != GSASL_OK)
return res;
}
input += headerlen;
input_len -= headerlen;
res = gsasl_property_set_raw (sctx, GSASL_SAML20_IDP_IDENTIFIER,
input, input_len);
if (res != GSASL_OK)
return res;
p = gsasl_property_get (sctx, GSASL_SAML20_REDIRECT_URL);
if (!p || !*p)
return GSASL_NO_SAML20_REDIRECT_URL;
*output_len = strlen (p);
*output = malloc (*output_len);
if (!*output)
return GSASL_MALLOC_ERROR;
memcpy (*output, p, *output_len);
res = GSASL_NEEDS_MORE;
state->step++;
break;
}
case 1:
{
if (!(input_len == 1 && *input == '='))
return GSASL_MECHANISM_PARSE_ERROR;
res = gsasl_callback (NULL, sctx, GSASL_VALIDATE_SAML20);
if (res != GSASL_OK)
return res;
*output = NULL;
*output_len = 0;
res = GSASL_OK;
state->step++;
break;
}
default:
break;
}
return res;
}
void
_gsasl_saml20_server_finish (Gsasl_session * sctx _GL_UNUSED, void *mech_data)
{
struct saml20_server_state *state = mech_data;
if (!state)
return;
free (state);
}
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