/* $Id: rsakeygen.c,v 1.6 2000/04/06 07:26:53 jm Exp $ * RSA key generation tool * * Dynamic hierarchial IP tunnel * Copyright (C) 1998-2000, Dynamics group * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. See README and COPYING for * more details. */#include <stdlib.h>#include <stdio.h>#include <string.h>#include "rsa_dyn.h"#include "message.h"#include "md5_mac.h"#include "util.h"int main(int argc, char *argv[]){	int bits, i;	struct msg_key *fa_public_key = NULL;	unsigned char mac[MD5_MAC_LEN];	if (argc != 3) {		fprintf(stderr, "usage\n"			"rsakeygen <keyfile name> <key len in bits>\n"			"e.g. rsakeygen /etc/dynfad.key 768\n");		exit(1);	}	bits = atoi(argv[2]);	printf("Generating %i bits long RSA key to file %s\n", bits, argv[1]);	if (rsa_make_key(argv[1], bits) != 0) {		fprintf(stderr, "RSA key generation failed\n");		exit(1);	} else {		printf("RSA key generated successfully\n");	}	/* Get the FA public key */	i = rsa_initialize(argv[1]);	if (i != 0) {		fprintf(stderr, "RSA initialization failed (key file: %s, "			"code: %i)\n", argv[1], i);		exit(1);	}	fa_public_key = (struct msg_key *)		malloc(sizeof(struct msg_key) + SPI_LEN +		       rsa_get_public_key_len() + 1);	if (fa_public_key == NULL) {		fprintf(stderr, "Not enough memory for fa_public_key\n");		exit(1);	}	if (rsa_get_public_key_len() + SPI_LEN > 255) {		fprintf(stderr, "fa_public_key over 255 bytes long - does "			"not fit into extension\n");		exit(1);	}	init_key_extension(fa_public_key, VENDOR_EXT_DYNAMICS_FA_PUBKEY,			   htonl(PUBKEY_ALG_SPI_RSA),			   rsa_get_public_key_len());  	memcpy(MSG_KEY_DATA(fa_public_key), rsa_get_public_key(),  	       GET_KEY_LEN(fa_public_key));	md5_mac((unsigned char *) "", 0, (unsigned char *) fa_public_key,		GET_KEY_EXT_LEN(fa_public_key), mac);	printf("RSA public key extension hash: ");	for (i = 0; i < MD5_MAC_LEN; i++)		printf("%02X", mac[i]);	printf("\n");	free(fa_public_key);	return 0;}