SHA.h

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//
// SHA.h
//
// Copyright (c) Shareaza Development Team, 2002-2005.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza is free software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Shareaza is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#if !defined(AFX_SHA_H__9CC84DD7_E62A_410F_BFE4_B6190C509ACE__INCLUDED_)
#define AFX_SHA_H__9CC84DD7_E62A_410F_BFE4_B6190C509ACE__INCLUDED_

#pragma once

class CSHA
{
// Construction
public:
        CSHA();
        ~CSHA();

// Attributes
 public:
        DWORD   m_nCount[2];
        DWORD   m_nHash[5];
        DWORD   m_nBuffer[16];                                          // if you change this modify the offsets sha_asm.asm accordingly

// Operations
public:
        void                    Reset();
        void                    Add(LPCVOID pData, DWORD nLength);
        void                    Finish();
        void                    GetHash(SHA1* pHash);
        CString                 GetHashString(BOOL bURN = FALSE);
public:
        static CString  HashToString(const SHA1* pHash, BOOL bURN = FALSE);
        static CString  HashToHexString(const SHA1* pHash, BOOL bURN = FALSE);
        static BOOL             HashFromString(LPCTSTR pszHash, SHA1* pHash);
        static BOOL             HashFromURN(LPCTSTR pszHash, SHA1* pHash);
        static BOOL             IsNull(SHA1* pHash);
protected:
//      void                    Compile();                      we don't need this anymore
};

#define SHA1_BLOCK_SIZE         64
#define SHA1_DIGEST_SIZE        20

inline bool operator==(const SHA1& sha1a, const SHA1& sha1b)
{
    return memcmp( &sha1a, &sha1b, 20 ) == 0;
}

inline bool operator!=(const SHA1& sha1a, const SHA1& sha1b)
{
    return memcmp( &sha1a, &sha1b, 20 ) != 0;
}

#endif // !defined(AFX_SHA_H__9CC84DD7_E62A_410F_BFE4_B6190C509ACE__INCLUDED_)

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