engines/ccgost/gost_ctl.c

   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
  17 static char *gost_params[GOST_PARAM_MAX+1]={NULL};
  18 static const char *gost_envnames[]={"CRYPT_PARAMS"};
  19 const ENGINE_CMD_DEFN gost_cmds[]=
  20         {
  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                         },
  36 {0,NULL,NULL,0}
  37         };
  38
  39 void gost_param_free()
  40 {
  41         int i;
  42         for (i=0;i<=GOST_PARAM_MAX;i++)
  43                 if (gost_params[i]!=NULL)
  44                         {
  45                         OPENSSL_free(gost_params[i]);
  46                         gost_params[i]=NULL;
  47                         }
  48
  49 }
  50
  51 int gost_control_func(ENGINE *e,int cmd,long i, void *p, void (*f)(void))
  52         {
  53         int param = cmd-ENGINE_CMD_BASE;
  54         int ret=0;
  55         if (param <0 || param >GOST_PARAM_MAX) return -1;
  56         ret=gost_set_default_param(param,p);
  57         return ret;
  58         }
  59
  60 const char *get_gost_engine_param(int param)
  61         {
  62         char *tmp;
  63         if (param <0 || param >GOST_PARAM_MAX) return NULL;
  64         if (gost_params[param]!=NULL)
  65                 {
  66                 return gost_params[param];
  67                 }
  68         tmp = getenv(gost_envnames[param]);
  69         if (tmp)
  70                 {
  71                 if (gost_params[param]) OPENSSL_free(gost_params[param]);
  72                 gost_params[param] = BUF_strdup(tmp);
  73                 return gost_params[param];
  74                 }
  75         return NULL;
  76         }
  77
  78 int gost_set_default_param(int param, const char *value)
  79         {
  80         const char *tmp;
  81         if (param <0 || param >GOST_PARAM_MAX) return 0;
  82         tmp = getenv(gost_envnames[param]);
  83         /* if there is value in the environment, use it, else -passed string * */
  84         if (!tmp) tmp=value;
  85         if (gost_params[param]) OPENSSL_free(gost_params[param]);
  86         gost_params[param] = BUF_strdup(tmp);
  87
  88         return 1;
  89         }