gost_ctl.c revision 296341 
1/**********************************************************************
2 *                        gost_ctl.c                                  *
3 *             Copyright (c) 2005-2006 Cryptocom LTD                  *
4 *       This file is distributed under the same license as OpenSSL   *
5 *                                                                    *
6 *        Implementation of control commands for GOST engine          *
7 *            OpenSSL 0.9.9 libraries required                        *
8 **********************************************************************/
9#include <stdlib.h>
10#include <string.h>
11#include <openssl/crypto.h>
12#include <openssl/err.h>
13#include <openssl/engine.h>
14#include <openssl/buffer.h>
15#include "gost_lcl.h"
16
17static char *gost_params[GOST_PARAM_MAX + 1] = { NULL };
18static const char *gost_envnames[] = { "CRYPT_PARAMS" };
19
20const ENGINE_CMD_DEFN gost_cmds[] = {
21/*- { GOST_CTRL_RNG,
22    "RNG",
23    "Type of random number generator to use",
24    ENGINE_CMD_FLAG_STRING
25    },
26    { GOST_CTRL_RNG_PARAMS,
27    "RNG_PARAMS",
28    "Parameter for random number generator",
29    ENGINE_CMD_FLAG_STRING
30    },
31*/ {GOST_CTRL_CRYPT_PARAMS,
32           "CRYPT_PARAMS",
33           "OID of default GOST 28147-89 parameters",
34           ENGINE_CMD_FLAG_STRING},
35    {0, NULL, NULL, 0}
36};
37
38void gost_param_free()
39{
40    int i;
41    for (i = 0; i <= GOST_PARAM_MAX; i++)
42        if (gost_params[i] != NULL) {
43            OPENSSL_free(gost_params[i]);
44            gost_params[i] = NULL;
45        }
46
47}
48
49int gost_control_func(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
50{
51    int param = cmd - ENGINE_CMD_BASE;
52    int ret = 0;
53    if (param < 0 || param > GOST_PARAM_MAX)
54        return -1;
55    ret = gost_set_default_param(param, p);
56    return ret;
57}
58
59const char *get_gost_engine_param(int param)
60{
61    char *tmp;
62    if (param < 0 || param > GOST_PARAM_MAX)
63        return NULL;
64    if (gost_params[param] != NULL) {
65        return gost_params[param];
66    }
67    tmp = getenv(gost_envnames[param]);
68    if (tmp) {
69        if (gost_params[param])
70            OPENSSL_free(gost_params[param]);
71        gost_params[param] = BUF_strdup(tmp);
72        return gost_params[param];
73    }
74    return NULL;
75}
76
77int gost_set_default_param(int param, const char *value)
78{
79    const char *tmp;
80    if (param < 0 || param > GOST_PARAM_MAX)
81        return 0;
82    tmp = getenv(gost_envnames[param]);
83    /*
84     * if there is value in the environment, use it, else -passed string *
85     */
86    if (!tmp)
87        tmp = value;
88    if (gost_params[param])
89        OPENSSL_free(gost_params[param]);
90    gost_params[param] = BUF_strdup(tmp);
91
92    return 1;
93}
94