CryptKey.h

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/*  CCryptKey.h.- cryptoAPI key wrapper
    Copyright (C) 2001-2004 Mark Weaver
    Written by Mark Weaver <mark@npsl.co.uk>

    Part of the Open-Win32 library.
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the
    Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA  02111-1307, USA.
*/

#ifndef OW32_CryptKey_h
#define OW32_CryptKey_h

#include <OW32/XHCRYPTKEY.h>

namespace OW32
{

class OW32_LIB_EXPORT CCryptKey
{
    XHCRYPTKEY m_hCryptKey;

    CCryptKey(const CCryptKey& );
    CCryptKey operator=(const CCryptKey& );

public:
    CCryptKey() {}

    CCryptKey(HCRYPTKEY hCryptKey) {
        m_hCryptKey = hCryptKey;
    }

    void Destroy()
    {
        m_hCryptKey.Close();
    }

    BOOL Gen(HCRYPTPROV hProv, ALG_ID AlgId, DWORD dwFlags=0)
    {
        m_hCryptKey.Close();
        return CryptGenKey(hProv, AlgId, dwFlags, &m_hCryptKey);
    }

    BOOL Derive(HCRYPTPROV hProv, ALG_ID AlgId, HCRYPTHASH hBaseData,
        DWORD dwFlags=0)
    {
        m_hCryptKey.Close();
        return CryptDeriveKey(hProv, AlgId, hBaseData, dwFlags, &m_hCryptKey);
    }

    BOOL Import(HCRYPTPROV hProv, BYTE* pbData, DWORD dwDataLen,
        HCRYPTKEY hPubKey=0, DWORD dwFlags=0)
    {
        m_hCryptKey.Close();
        return CryptImportKey(hProv, pbData, dwDataLen,
            hPubKey, dwFlags, &m_hCryptKey);
    }

    BOOL Decrypt(BYTE *pbData, DWORD *cbData, 
        BOOL bFinal = TRUE, HCRYPTHASH hHash = NULL, DWORD dwFlags = 0)
    {
        return CryptDecrypt(m_hCryptKey, hHash, bFinal, dwFlags, pbData, cbData);
    }

    BOOL Encrypt(BYTE *pbData, DWORD *cbData, DWORD cbBuf,
        BOOL bFinal = TRUE, HCRYPTHASH hHash = NULL, DWORD dwFlags = 0)
    {
        return CryptEncrypt(m_hCryptKey, hHash, bFinal, dwFlags, pbData, cbData, cbBuf);
    }
};

} // namespace OW32

#endif // OW32_CryptKey_h

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