Initial commit

[openssl-gost/engine.git] / gost_ctl.c

diff --git a/gost_ctl.c b/gost_ctl.c
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+++ b/gost_ctl.c
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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;
+}