115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
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/*
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*
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* Copyright (C) 1998-2011, OFFIS e.V.
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* All rights reserved. See COPYRIGHT file for details.
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*
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* This software and supporting documentation were developed by
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*
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* OFFIS e.V.
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* R&D Division Health
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* Escherweg 2
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* D-26121 Oldenburg, Germany
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*
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*
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* Module: dcmsign
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*
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* Author: Marco Eichelberg
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*
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* Purpose:
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* classes: SiDSA
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*
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*/
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#ifndef SIDSA_H
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#define SIDSA_H
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#include "dcmtk/config/osconfig.h"
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#include "dcmtk/dcmsign/sialgo.h"
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#ifdef WITH_OPENSSL
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#include "dcmtk/ofstd/oftypes.h"
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class SiPrivateKey;
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struct dsa_st;
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typedef struct dsa_st DSA;
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/**
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* This class implements the DSA public key crypto algorithms.
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*
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*/
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class DCMTK_DCMSIGN_EXPORT SiDSA : public SiAlgorithm
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{
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public:
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/** constructor
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* @param pointer to public DSA key
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*/
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SiDSA(DSA *key);
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/// destructor
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virtual ~SiDSA();
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/** creates a signature.
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* @param inputHash array of hash key bytes that are to be signed
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* @param inputHashSize length of hash key array in bytes
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* @param inputHashAlgorithm MAC algorithm used for creation of hash key. Ignored for DSA signatures.
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* @param outputSignature pointer to array of at least getSize() which must be allocated by caller.
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* @param outputSignatureSize returns the number of bytes written to outputSignature.
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* @return SI_EC_Normal if successful, errorcode otherwise.
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*/
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virtual OFCondition sign(
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const unsigned char *inputHash,
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unsigned long inputHashSize,
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E_MACType inputHashAlgorithm,
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unsigned char *outputSignature,
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unsigned long &outputSignatureSize);
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/** verifies a signature.
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* @param inputHash array of bytes containing hash key to be verified against signature
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* @param inputHashSize length of hash key array in bytes
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* @param inputHashAlgorithm MAC algorithm used for creation of hash key. Ignored for DSA signatures.
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* @param inputSignature array of bytes containing signature to be verified
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* @param inputSignatureSize length of signature array in bytes
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* @param verified returns whether the signature was successfully verified
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* @return SI_EC_Normal if successful, errorcode otherwise.
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*/
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virtual OFCondition verify(
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const unsigned char *inputHash,
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unsigned long inputHashSize,
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E_MACType inputHashAlgorithm,
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const unsigned char *inputSignature,
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unsigned long inputSignatureSize,
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OFBool &verified);
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/** returns the size of a block of encrypted/decrypted ciphertext in bytes.
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* The result depends on the public key algorithm, key size and padding scheme.
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* In general the input to decrypt() or encrypt() must be less than or equal
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* to this block size. The output of decrypt() or encrypt() is always equal
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* to this block size.
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* @return block size for this public key cryptosystem and key
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*/
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virtual unsigned long getSize() const;
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/** returns the type of public key algorithm computed by this object
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* @return type of public key algorithm
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*/
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virtual E_KeyType keyType() const;
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private:
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/// private undefined copy constructor
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SiDSA(SiDSA& arg);
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/// private undefined copy assignment operator
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SiDSA& operator=(SiDSA& arg);
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/// DSA key used for signature/verification
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DSA *dsa;
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};
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#endif
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#endif
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