/*

 * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 * Generate a DSA key.

 *

 */

 /**

  @file

 */

 #include <stdio.h>

 #include <openssl/crypto.h>

 #include <openssl/rand.h>

 #include <openssl/dsa.h>

 #include <openssl/bn.h>

 #include "utils.h"

 #ifndef BOOL

 #define BOOL int

 #define TRUE 1

 #define FALSE 0

 #endif

 static void printDSAKey(DSA* key)

     {

     printf("static DSA* createDSAKey()\n");

     printf("\t{\n");

     printCBN("p_data", key->p);

     printCBN("q_data", key->q);

     printCBN("g_data", key->g);

     printCBN("priv_key_data", key->priv_key);

     printCBN("pub_key_data", key->pub_key);

     printf("\tDSA* key = DSA_new();\n");

     printf("\tkey->p = BN_new();\n");

     printf("\tkey->q = BN_new();\n");

     printf("\tkey->g = BN_new();\n");

     printf("\tkey->priv_key = BN_new();\n");

     printf("\tkey->pub_key = BN_new();\n\n");

     printf("\tBN_bin2bn(p_data, p_data_len, key->p);\n");

     printf("\tBN_bin2bn(q_data, q_data_len, key->q);\n");

     printf("\tBN_bin2bn(g_data, g_data_len, key->g);\n");

     printf("\tBN_bin2bn(pub_key_data, pub_key_data_len, key->pub_key);\n");

     printf("\tBN_bin2bn(priv_key_data, priv_key_data_len, key->priv_key);\n\n");

     printf("\treturn key;\n");

     printf("\t}\n");

     }

 /*

  * This is the seed used in the openssl test code.  Using it (by

  * specifying the -use_seed option) makes this program generate the

  * same key used in the openssl test code

  *

  * It comes from the updated Appendix 5 to FIPS PUB 186.

  */

 static unsigned char seed[20]={

 	0xd5,0x01,0x4e,0x4b,0x60,0xef,0x2b,0xa8,0xb6,0x21,0x1b,0x40,

 	0x62,0xba,0x32,0x24,0xe0,0x42,0x7d,0xd3,

 	};

 static const char rnd_seed[] = "string to make the random number generator think it has entropy";

 static void badUsage()

     {

     printf("usage: gen_dsakey [ -use_seed ]\n");

     exit(1);

     }

 int main(int argc, char **argv)

 	{

 	DSA *dsa=NULL;

 	int counter,ret=0,i,j;

 	unsigned char buf[256];

 	unsigned long h;

 	unsigned char sig[256];

 	unsigned int siglen;

     BOOL useSeed = FALSE;

     if (argc > 2)

         badUsage();

     else if (argc == 2)

         {

         if (strcmp(argv[1], "-use_seed") != 0)

             badUsage();

         useSeed = TRUE;

         }

 	RAND_seed(rnd_seed, sizeof rnd_seed);

 	dsa=DSA_generate_parameters(512,useSeed ? seed : NULL,20,&counter,&h,NULL,NULL);

 	DSA_generate_key(dsa);

     printDSAKey(dsa);

 	return 0;

 	}