PKIFCryptoPPExternalDigest.h

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#ifndef __PKIFCRYPTOPPEXTERNALDIGEST_H__
#define __PKIFCRYPTOPPEXTERNALDIGEST_H__

#include "PKIFdll.h"
#include "cryptlib.h"
#include "pubkey.h"

class PKIFCryptoPPExternalDigest : public CryptoPP::HashTransformation
{
public:

    PKIFCryptoPPExternalDigest() : m_digestBuf(0),m_digestSize(0) {}
    ~PKIFCryptoPPExternalDigest();

    void SetDigest(const unsigned char * buf, unsigned int length);

    // XXX Revisit: Should this throw if it's called?
    void Update(const byte * input, size_t length) {}
    unsigned int DigestSize() const;
    void TruncatedFinal(byte * digest, size_t digestSize);
    bool TruncatedVerify(const byte * digest, size_t digestLength);

private:
    unsigned int m_digestSize;
    unsigned char * m_digestBuf;
};


typedef CryptoPP::PK_MessageAccumulatorImpl<PKIFCryptoPPExternalDigest> PKIFCryptoPPExternalDigestAccumulator;

PKIFCryptoPPExternalDigestAccumulator * NewEDAccumulator( unsigned char * digest, size_t len);


#endif