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openssl/engines/ccgost/gost_ctl.c

Index: openssl/engines/ccgost/gost_ctl.c
===================================================================
--- openssl/engines/ccgost/gost_ctl.c	(revision 0)
+++ openssl/engines/ccgost/gost_ctl.c	(revision 0)
@@ -0,0 +1,89 @@
+/**********************************************************************
+ *                        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;
+	}