mirror of
https://github.com/unrealircd/unrealircd.git
synced 2026-06-29 14:46:38 +02:00
Bram Matthys
482df3dce3
instead of using a 2nd flag here for the special case of "the first zip msg" like in hybrid/etc I use cptr->zip->first to flag that. Except for the many #ifdef ZIP_LINKS blocks added I also had to do some stuff outside it, like crc32->our_crc32 because zlib defines it, made a READBUF define (8192), added a msg var to parsing/send functions.. blah.. etc ;P. I've also put the patch online at www.vulnscan.org/tmp/zip_links.diff so you can easily look what I've changed. TODO: ask in ./Config if ziplinks should be enabled and let ./configure check for zlib + add the library to IRCDLIBS in Makefile if enabled. TODO: some little code cleanups
178 lines
4.6 KiB
C
178 lines
4.6 KiB
C
/************************************************************************
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* IRC - Internet Relay Chat, random.c
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* (C) 2003 Bram Matthys (Syzop) <syz@dds.nl>
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*
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* See file AUTHORS in IRC package for additional names of
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* the programmers.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "struct.h"
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#include "common.h"
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#include "sys.h"
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#include "numeric.h"
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#include "msg.h"
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#include "channel.h"
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#include "version.h"
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#include <time.h>
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#ifdef _WIN32
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#include <sys/timeb.h>
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#endif
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#include <sys/stat.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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#include <io.h>
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#endif
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#include <fcntl.h>
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#include "h.h"
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#ifdef NOSPOOF
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/*
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* getrandom32, written by Syzop.
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* This function returns a random 32bit value
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*/
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u_int32_t getrandom32()
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{
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u_int32_t result;
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#ifdef USE_SSL
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int n;
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#endif
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#ifndef _WIN32
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static struct timeval prevt;
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struct timeval nowt;
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#else
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static struct _timeb prevt;
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struct _timeb nowt;
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#endif
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#ifdef USE_SSL
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#if OPENSSL_VERSION_NUMBER >= 0x000907000
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if (EGD_PATH) {
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n = RAND_query_egd_bytes(EGD_PATH, (unsigned char *)&result, sizeof(result));
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if (n == sizeof(result))
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return result;
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}
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#endif
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#endif
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#ifndef _WIN32
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gettimeofday(&nowt, NULL);
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/* [random() may return <31 random bits, I assume it will be at least 16 bits]
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* 31bits (low) ^ 16bits (high) ^ 19bits (low) ^ 19bits (high) */
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result = random() ^ (random() << 16) ^ nowt.tv_usec ^ (prevt.tv_usec << 13);
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#else
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_ftime(&nowt);
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/* 15bits (0..14) ^ 15 bits (10..24) ^ 12 bits (20..31) ^
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* 10bits (10..19) ^ 10 bits (20..29)
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*/
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result = rand() ^ (rand() << 10) ^ (rand() << 20) ^
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(nowt.millitm << 10) ^ (prevt.millitm << 20);
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#endif
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prevt = nowt;
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return result;
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}
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#endif
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static unsigned int entropy_cfgcrc = 0, entropy_cfgsize = 0;
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static time_t entropy_cfgmtime = 0;
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void add_entropy_configfile(struct stat st, char *buf)
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{
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entropy_cfgsize = (entropy_cfgsize << 4) ^ st.st_size;
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entropy_cfgmtime = (entropy_cfgmtime << 4) ^ st.st_mtime;
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entropy_cfgcrc = entropy_cfgcrc ^ (unsigned int)our_crc32(buf, strlen(buf));
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Debug((DEBUG_INFO, "add_entropy_configfile: cfgsize: %u", entropy_cfgsize));
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Debug((DEBUG_INFO, "add_entropy_configfile: cfgmtime: %u",
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(unsigned int)entropy_cfgmtime));
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Debug((DEBUG_INFO, "add_entropy_configfile: cfgcrc: %u", entropy_cfgcrc));
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}
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/*
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* init_random, written by Syzop
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* This function (hopefully) intialises the random generator securely
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*/
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void init_random()
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{
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unsigned int seed, egd = 0;
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time_t now = TStime();
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#ifdef USE_SSL
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int n;
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#endif
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#ifndef _WIN32
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struct timeval nowt;
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unsigned int xrnd = 0;
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int fd;
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#else
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MEMORYSTATUS mstat;
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struct _timeb nowt;
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#endif
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#ifdef USE_SSL
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#if OPENSSL_VERSION_NUMBER >= 0x000907000
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if (EGD_PATH) {
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n = RAND_query_egd_bytes(EGD_PATH, (unsigned char *)&egd, sizeof(egd));
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Debug((DEBUG_INFO,
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"init_random: RAND_query_egd_bytes() ret=%d, val=%.8x", n, egd));
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}
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#endif
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#endif
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/* Grab non-OS specific "random" data */
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/* Grab OS specific "random" data */
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#ifndef _WIN32
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gettimeofday(&nowt, NULL);
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fd = open("/dev/urandom", O_RDONLY);
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if (fd) {
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(void)read(fd, &xrnd, sizeof(int));
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Debug((DEBUG_INFO, "init_random: read from /dev/urandom: 0x%.8x", xrnd));
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close(fd);
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}
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#else
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_ftime(&nowt);
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GlobalMemoryStatus (&mstat);
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#ifdef DEBUGMODE
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Debug((DEBUG_INFO, "init_random: mstat.dwAvailPhys=%u, mstat.dwAvailPageFile=%u\n",
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mstat.dwAvailPhys, mstat.dwAvailPageFile));
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#endif
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#endif
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/* Build the seed (OS specific again) */
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#ifndef _WIN32
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seed = now ^ nowt.tv_usec ^ getpid() ^ (entropy_cfgsize << 24) ^
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(entropy_cfgmtime << 16) ^ entropy_cfgcrc ^ CLOAK_KEY1 ^ xrnd ^ egd;
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#else
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seed = now ^ nowt.millitm ^ getpid() ^ mstat.dwAvailPhys ^
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(mstat.dwAvailPageFile << 16) ^ (entropy_cfgsize << 8) ^
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(entropy_cfgmtime << 24) ^ entropy_cfgcrc ^ CLOAK_KEY1 ^ egd;
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#endif
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Debug((DEBUG_INFO, "init_random: seeding to 0x%.8x (%u)", seed, seed));
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srand(seed);
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#ifdef LRAND48
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srand48(seed);
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#endif
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#ifndef _WIN32
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srandom(seed);
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#endif
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}
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