AppleCSP/MiscCSPAlgs/DES.h

   1 /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
   2  *
   3  * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
   4  * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
   5  * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE COMPUTER, INC. AND THE
   6  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE COMPUTER,
   7  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
   8  * EXPOSE YOU TO LIABILITY.
   9  ***************************************************************************
  10  *
  11  * DES.h - raw DES encryption engine interface
  12  *
  13  * Revision History
  14  * ----------------
  15  * 31 Mar 97    Doug Mitchell at Apple
  16  *      Put per-instance data in struct _desInst
  17  * 21 Aug 96    Doug Mitchell at NeXT
  18  *      Broke out from NSDESCryptor.m
  19  * 22 Feb 96    Blaine Garst at NeXT
  20  *      Created.
  21  */
  22
  23 #ifndef _CK_DES_H_
  24 #define _CK_DES_H_
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 #define DES_BLOCK_SIZE_BYTES            8       /* in bytes */
  31 #define DES_KEY_SIZE_BITS                       56      /* effective key size in bits */
  32 #define DES_KEY_SIZE_BITS_EXTERNAL      64      /* clients actually pass in this much */
  33 #define DES_KEY_SIZE_BYTES_EXTERNAL     (DES_KEY_SIZE_BITS_EXTERNAL / 8)
  34
  35 #define DES_MODE_STD    0       /* standard Data Encryption Algorithm */
  36 #define DES_MODE_FAST   1       /* DEA without initial and final */
  37                                 /*    permutations for speed */
  38 #define DES_MODE_128    2       /* DEA without permutations and with */
  39                                 /*    128-byte key (completely independent */
  40                                 /*    subkeys for each round) */
  41
  42 /*
  43  * Per-instance data.
  44  */
  45 struct _desInst {
  46         /* 8 16-bit subkeys for each of 16 rounds, initialized by setkey()
  47          */
  48         unsigned char kn[16][8];
  49         int desmode;
  50 };
  51
  52 typedef struct _desInst *desInst;
  53
  54 /* Warning: desinit() is NOT thread safe. Caller must single-thread. */
  55 int desinit(desInst dinst, int mode);
  56 void dessetkey(desInst dinst, char *key);
  57 void endes(desInst dinst, char *block);
  58 void dedes(desInst dinst, char *block);
  59 void desdone(desInst dinst);
  60
  61 #ifdef __cplusplus
  62 }
  63 #endif
  64
  65 #endif  /*_CK_DES_H_*/