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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* simplertp-genkey.cc
*
* Sun Sep 21 09:40:48 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of SimpleRTP.
*
* SimpleRTP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* SimpleRTP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with SimpleRTP; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
int getrandom(char *buf, size_t size)
{
FILE *fp = fopen("/dev/random", "r");
if(!fp) {
perror("Could not open /dev/random for reading");
return 1;
}
int ret = fread(buf, 1, size, fp);
fclose(fp);
if(ret != size) {
fprintf(stderr, "Could not read %d bytes from /dev/random, only got %d\n",
size, ret);
return 1;
}
return 0;
}
int main()
{
fprintf(stderr, "Generating key and ssrc...\n");
fprintf(stderr, " - Move your mouse to generate entropy"
" or this will take a looooong time.\n");
char key[30];
if(getrandom(key, sizeof(key)) != 0) return 1;
char ssrc[4];
if(getrandom(ssrc, sizeof(ssrc)) != 0) return 1;
printf("[crypto]\n");
printf("key=\"");
for(int i = 0; i < sizeof(key); i++) {
printf("%02x", (unsigned char)key[i]);
}
printf("\"\n");
printf("ssrc=%u\n", *((unsigned int*)ssrc));
return 0;
}
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