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70 lines
1.8 KiB
70 lines
1.8 KiB
/*++
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Copyright (c) 2000 Intel Corporation
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Module Name:
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crypto.c
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Abstract:
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Add support for IEEE Node address generation when there is
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not a SNP-compliant NIC attached.
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Revision History
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** Intel 2000 Update for EFI 1.0
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** Copyright (c) 1990- 1993, 1996 Open Software Foundation, Inc.
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** Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, Ca. &
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** Digital Equipment Corporation, Maynard, Mass.
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** To anyone who acknowledges that this file is provided “AS IS”
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** without any express or implied warranty: permission to use, copy,
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** modify, and distribute this file for any purpose is hereby
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** granted without fee, provided that the above copyright notices and
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** this notice appears in all source code copies, and that none of
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** the names of Open Software Foundation, Inc., Hewlett-Packard
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** Company, or Digital Equipment Corporation be used in advertising
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** or publicity pertaining to distribution of the software without
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** specific, written prior permission. Neither Open Software
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** Foundation, Inc., Hewlett-Packard Company, nor Digital Equipment
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** Corporation makes any representations about the suitability of
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** this software for any purpose.
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*/
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#include "efi.h"
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#include "efilib.h"
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#include "md5.h"
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#define HASHLEN 16
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void GenNodeID(
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unsigned char *pDataBuf,
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long cData,
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UINT8 NodeID[]
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)
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{
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int i, j;
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unsigned char Hash[HASHLEN];
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MD5_CTX context;
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MD5Init (&context);
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MD5Update (&context, pDataBuf, cData);
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MD5Final (&context);
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for (j = 0; j<6; j++) {
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NodeID[j]=0;
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}
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for (i = 0,j = 0; i < HASHLEN; i++) {
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NodeID[j++] ^= Hash[i];
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if (j == 6) {
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j = 0;
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}
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}
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NodeID[0] |= 0x80; // set the multicast bit
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}
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