Mercurial > vba-linux

     1 // Crypto/Sha1.h

     2 // This file is based on public domain

     3 // Steve Reid and Wei Dai's code from Crypto++

     4 

     5 #ifndef __CRYPTO_SHA1_H

     6 #define __CRYPTO_SHA1_H

     7 

     8 #include <stddef.h>

     9 #include "../../Common/Types.h"

    10 

    11 // Sha1 implementation in RAR before version 3.60 has bug:

    12 // it changes data bytes in some cases.

    13 // So this class supports both versions: normal_SHA and rar3Mode

    14 

    15 namespace NCrypto {

    16 namespace NSha1 {

    17 

    18 const unsigned kBlockSize = 64;

    19 const unsigned kDigestSize = 20;

    20 

    21 const unsigned kBlockSizeInWords = (kBlockSize >> 2);

    22 const unsigned kDigestSizeInWords = (kDigestSize >> 2);

    23 

    24 class CContextBase

    25 {

    26 protected:

    27   UInt32 _state[5];

    28   UInt64 _count;

    29   void UpdateBlock(UInt32 *data, bool returnRes = false)

    30   {

    31     GetBlockDigest(data, _state, returnRes);

    32     _count++;

    33   }

    34 public:

    35   void Init();

    36   void GetBlockDigest(UInt32 *blockData, UInt32 *destDigest, bool returnRes = false);

    37   // PrepareBlock can be used only when size <= 13. size in Words

    38   void PrepareBlock(UInt32 *block, unsigned int size) const;

    39 };

    40 

    41 class CContextBase2: public CContextBase

    42 {

    43 protected:

    44   unsigned _count2;

    45   UInt32 _buffer[kBlockSizeInWords];

    46   void UpdateBlock() { CContextBase::UpdateBlock(_buffer); }

    47 public:

    48   void Init() { CContextBase::Init(); _count2 = 0; }

    49 };

    50 

    51 class CContext: public CContextBase2

    52 {

    53 public:

    54   void Update(Byte *data, size_t size, bool rar350Mode = false);

    55   void Update(const Byte *data, size_t size) { Update((Byte *)data, size, false); }

    56   void Final(Byte *digest);

    57 };

    58 

    59 class CContext32: public CContextBase2

    60 {

    61 public:

    62   void Update(const UInt32 *data, size_t size);

    63   void Final(UInt32 *digest);

    64 };

    65 

    66 }}

    67 

    68 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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