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/*
* Copyright (C) 2004 g10 Code GmbH
*
* This program 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.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "crypt-mod.h"
/* A type an a variable to keep track of registered crypto modules. */
typedef struct crypt_module *crypt_module_t;
struct crypt_module
{
crypt_module_specs_t specs;
crypt_module_t next, *prevp;
};
static crypt_module_t modules;
/* Register a new crypto module. */
void crypto_module_register (crypt_module_specs_t specs)
{
crypt_module_t module_new = safe_malloc (sizeof (*module_new));
module_new->specs = specs;
module_new->next = modules;
if (modules)
modules->prevp = &module_new->next;
modules = module_new;
}
/* Return the crypto module specs for IDENTIFIER. This function is
usually used via the CRYPT_MOD_CALL[_CHECK] macros. */
crypt_module_specs_t crypto_module_lookup (int identifier)
{
crypt_module_t module = modules;
while (module && (module->specs->identifier != identifier))
module = module->next;
return module ? module->specs : NULL;
}
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