56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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net_com.c
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MDfour-based checksum utility functions
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Copyright (C) 1999, 2000 The QuakeForge Project
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Author: Jeff Teunissen <d2deek@pmail.net>
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Date: 01 Jan 2000
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This file is part of the QuakeForge utility library.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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.
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See the GNU General Public License for more details.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <mdfour.h>
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unsigned Com_BlockChecksum (void *buffer, int length)
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{
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int digest[4];
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unsigned val;
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struct mdfour md;
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mdfour_begin (&md);
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mdfour_update (&md, (unsigned char *) buffer, length);
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mdfour_result (&md, (unsigned char *) digest);
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// mdfour ( (unsigned char *) digest, (unsigned char *) buffer, length );
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val = digest[0] ^ digest[1] ^ digest[2] ^ digest[3];
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return val;
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}
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void Com_BlockFullChecksum (void *buffer, int len, unsigned char *outbuf)
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{
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struct mdfour md;
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mdfour_begin (&md);
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mdfour_update (&md, (unsigned char *) buffer, len);
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mdfour_result (&md, outbuf);
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// mdfour ( outbuf, (unsigned char *) buffer, len );
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}
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