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136 lines
3.4 KiB
136 lines
3.4 KiB
// HashCtx.h -- declaration of CHashContext
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// (c) Copyright Schlumberger Technology Corp., unpublished work, created
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// 1998. This computer program includes Confidential, Proprietary
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// Information and is a Trade Secret of Schlumberger Technology Corp. All
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// use, disclosure, and/or reproduction is prohibited unless authorized
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// in writing. All Rights Reserved.
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#if !defined(SLBCSP_HASHCTX_H)
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#define SLBCSP_HASHCTX_H
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#include <memory> // for auto_ptr
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#include <wincrypt.h>
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#include <handles.h>
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#include "Blob.h"
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#include "CryptCtx.h"
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class CHashContext
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: public CHandle
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{
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public:
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// Types
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typedef DWORD SizeType;
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typedef BYTE ValueType;
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// C'tors/D'tors
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virtual
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~CHashContext() throw();
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// Operators
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// Operations
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virtual std::auto_ptr<CHashContext>
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Clone(DWORD const *pdwReserved,
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DWORD dwFlags) const = 0;
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void
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Close();
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void
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ExportFromAuxCSP();
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void
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Hash(BYTE const *pbData,
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DWORD dwLength);
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HCRYPTHASH
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HashHandleInAuxCSP();
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void
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ImportToAuxCSP();
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void
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Initialize();
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static std::auto_ptr<CHashContext>
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Make(ALG_ID algid,
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CryptContext const &rcryptctx);
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void
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Value(Blob const &rhs);
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// Access
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ALG_ID
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AlgId();
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Blob
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EncodedValue();
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SizeType
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Length() const;
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Blob
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Value();
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// Predicates
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static bool
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IsSupported(ALG_ID algid);
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protected:
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// Types
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// C'tors/D'tors
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CHashContext(CryptContext const &rcryptctx,
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ALG_ID algid);
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// Duplicate the hash and its state
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CHashContext(CHashContext const &rhs,
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DWORD const *pdwReserved,
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DWORD dwFlags);
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// Operators
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// Operations
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// Access
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virtual Blob
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EncodedAlgorithmOid() = 0;
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// Predicates
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// Variables
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private:
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// Types
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// C'tors/D'tors
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// not defined, copying not allowed...use Clone
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CHashContext(CHashContext const &rhs);
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// Operators
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// not defined, initialization not allowed
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CHashContext &
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operator==(CHashContext const &rhs);
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// Operations
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// Access
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// Predicates
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// Variables
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CryptContext const &m_rcryptctx;
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ALG_ID const m_algid;
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Blob m_blbValue;
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bool m_fDone;
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bool m_fJustCreated;
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HCRYPTHASH m_HashHandle;
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};
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#endif // SLBCSP_HASHCTX_H
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