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/*
* Copyright (C) 2001 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* GNUTLS is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUTLS 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <defines.h>
#include "gnutls_int.h"
#include "gnutls_errors.h"
#include "gnutls_auth.h"
/* The functions here are used in order for authentication algorithms
* to be able to retrieve the needed credentials eg public and private
* key etc.
*/
/* This clears the whole linked list */
int gnutls_clear_creds( GNUTLS_STATE state) {
AUTH_CRED * ccred, *ncred;
if (state->gnutls_key->cred!=NULL) { /* begining of the list */
ccred = state->gnutls_key->cred;
while(ccred!=NULL) {
ncred = ccred->next;
if (ccred!=NULL) gnutls_free(ccred);
ccred = ncred;
}
state->gnutls_key->cred = NULL;
}
return 0;
}
/*
* This creates a linked list of the form:
* { algorithm, credentials, pointer to next }
*/
int gnutls_set_kx_cred( GNUTLS_STATE state, int kx, void* cred) {
AUTH_CRED * ccred, *pcred;
int exists=0;
if (state->gnutls_key->cred==NULL) { /* begining of the list */
state->gnutls_key->cred = gnutls_malloc(sizeof(AUTH_CRED));
if (state->gnutls_key->cred == NULL) return GNUTLS_E_MEMORY_ERROR;
/* copy credentials localy */
state->gnutls_key->cred->credentials = cred;
state->gnutls_key->cred->next = NULL;
state->gnutls_key->cred->algorithm = kx;
} else {
ccred = state->gnutls_key->cred;
while(ccred!=NULL) {
if (ccred->algorithm==kx) {
exists=1;
break;
}
pcred = ccred;
ccred = ccred->next;
}
if (exists==0) { /* new entry */
pcred->next = gnutls_malloc(sizeof(AUTH_CRED));
if (pcred->next == NULL) return GNUTLS_E_MEMORY_ERROR;
ccred = pcred->next;
/* copy credentials localy */
ccred->credentials = cred;
ccred->next = NULL;
ccred->algorithm = kx;
} else { /* modify existing entry */
gnutls_free(ccred->credentials);
ccred->credentials = cred;
}
}
return 0;
}
/*
* This returns an pointer to the linked list. Don't
* free that!!!
*/
void *_gnutls_get_kx_cred( GNUTLS_KEY key, int kx, int *err) {
AUTH_CRED * ccred;
ccred = key->cred;
while(ccred!=NULL) {
if (ccred->algorithm==kx) {
break;
}
ccred = ccred->next;
}
if (ccred==NULL) {
if (err!=NULL) *err=-1;
return NULL;
}
if (err!=NULL) *err=0;
return ccred->credentials;
}
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