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/**********************************************************************
* gost_ctl.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* This file is distributed under the same license as OpenSSL *
* *
* Implementation of control commands for GOST engine *
* OpenSSL 0.9.9 libraries required *
**********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/engine.h>
#include <openssl/buffer.h>
#include "gost_lcl.h"
static char *gost_params[GOST_PARAM_MAX + 1] = { NULL };
static const char *gost_envnames[] = { "CRYPT_PARAMS" };
const ENGINE_CMD_DEFN gost_cmds[] = {
/*- { GOST_CTRL_RNG,
"RNG",
"Type of random number generator to use",
ENGINE_CMD_FLAG_STRING
},
{ GOST_CTRL_RNG_PARAMS,
"RNG_PARAMS",
"Parameter for random number generator",
ENGINE_CMD_FLAG_STRING
},
*/ {GOST_CTRL_CRYPT_PARAMS,
"CRYPT_PARAMS",
"OID of default GOST 28147-89 parameters",
ENGINE_CMD_FLAG_STRING},
{0, NULL, NULL, 0}
};
void gost_param_free()
{
int i;
for (i = 0; i <= GOST_PARAM_MAX; i++)
if (gost_params[i] != NULL) {
OPENSSL_free(gost_params[i]);
gost_params[i] = NULL;
}
}
int gost_control_func(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int param = cmd - ENGINE_CMD_BASE;
int ret = 0;
if (param < 0 || param > GOST_PARAM_MAX)
return -1;
ret = gost_set_default_param(param, p);
return ret;
}
const char *get_gost_engine_param(int param)
{
char *tmp;
if (param < 0 || param > GOST_PARAM_MAX)
return NULL;
if (gost_params[param] != NULL) {
return gost_params[param];
}
tmp = getenv(gost_envnames[param]);
if (tmp) {
if (gost_params[param])
OPENSSL_free(gost_params[param]);
gost_params[param] = BUF_strdup(tmp);
return gost_params[param];
}
return NULL;
}
int gost_set_default_param(int param, const char *value)
{
const char *tmp;
if (param < 0 || param > GOST_PARAM_MAX)
return 0;
tmp = getenv(gost_envnames[param]);
/*
* if there is value in the environment, use it, else -passed string *
*/
if (!tmp)
tmp = value;
if (gost_params[param])
OPENSSL_free(gost_params[param]);
gost_params[param] = BUF_strdup(tmp);
return 1;
}
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