102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
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//-----------------------------------------------------------------------------
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//
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// File: des.h
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//
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// Microsoft Digital Rights Management
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// Copyright (C) Microsoft Corporation, 1999-2001. All Rights Reserved
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//
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// Description:
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//
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//-----------------------------------------------------------------------------
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#ifndef __DES_H__
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#define __DES_H__
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#ifndef RSA32API
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#define RSA32API __stdcall
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _destable {
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unsigned long keytab[16][2];
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} DESTable;
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#define DES_TABLESIZE (sizeof(DESTable))
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#define DES_BLOCKLEN (8)
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#define DES_KEYSIZE (8)
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typedef struct _desxtable {
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unsigned char inWhitening[8];
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unsigned char outWhitening[8];
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DESTable desTable;
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} DESXTable;
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#define DESX_TABLESIZE (sizeof(DESXTable))
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#define DESX_BLOCKLEN (8)
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#define DESX_KEYSIZE (24)
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/* In deskey.c:
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Fill in the DESTable struct with the decrypt and encrypt
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key expansions.
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Assumes that the second parameter points to DES_BLOCKLEN
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bytes of key.
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*/
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void RSA32API deskey(DESTable *,unsigned char *);
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/* In desport.c:
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Encrypt or decrypt with the key in DESTable
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*/
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void RSA32API des(BYTE *pbOut, BYTE *pbIn, void *key, int op);
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//
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// set the parity on the DES key to be odd
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// NOTE : must be called before deskey
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// key must be cbKey number of bytes
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//
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void RSA32API desparityonkey(BYTE *pbKey, DWORD cbKey);
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//
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// reduce the DES key to a 40 bit key
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// NOTE : must be called before deskey
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// key must be 8 bytes
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//
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void RSA32API desreducekey(BYTE *key);
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// Expand 40 bit DES key to 64 and check weakness
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// same as desreducekey except expands instead of weakening keys
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void RSA32API deskeyexpand(BYTE *pbKey, BYTE *pbExpanded_key);
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void
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RSA32API
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desexpand128to192(
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BYTE *pbKey, // input 128bit or 192bit buffer
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BYTE *pbExpandedKey // output buffer (must be 192bit wide if pbKey == pbExpandedKey
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);
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// DES-X routines
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// initialize desX key struct. key size is 24 bytes
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void RSA32API desxkey(DESXTable *k, BYTE *key);
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void RSA32API desx(BYTE *pbOut, BYTE *pbIn, void *keyin, int op);
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extern int Asmversion; /* 1 if we're linked with an asm version, 0 if C */
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#ifdef __cplusplus
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}
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#endif
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#endif // __DES_H__
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