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/usr/include/dcmtk/dcmsign/sinullpr.h is in libdcmtk-dev 3.6.1~20150924-5.

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/*
 *
 *  Copyright (C) 1998-2011, OFFIS e.V.
 *  All rights reserved.  See COPYRIGHT file for details.
 *
 *  This software and supporting documentation were developed by
 *
 *    OFFIS e.V.
 *    R&D Division Health
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *
 *  Module: dcmsign
 *
 *  Author: Marco Eichelberg
 *
 *  Purpose:
 *    classes: SiNullProfile
 *
 */

#ifndef SINULLPR_H
#define SINULLPR_H

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmsign/sisprof.h"   /* for SiSecurityProfile */

#ifdef WITH_OPENSSL

/** defines a "null" security profile that does not require or forbid any 
 *  MAC algorithm, signature algorithm, or attribute tag. This class can be
 *  used to clean up a proposed attribute list against a dataset.
 */
class DCMTK_DCMSIGN_EXPORT SiNullProfile: public SiSecurityProfile
{
public:

  /// default constructor
  SiNullProfile() { }

  /// destructor
  virtual ~SiNullProfile() { }
  
  /** checks whether the given MAC type can be used with this security profile.
   *  @param macType MAC type to be checked
   *  @return true if MAC type is allowable for this profile, false otherwise.
   */
  virtual OFBool isAllowableMACType(E_MACType macType) const;

  /** checks whether the given public/private key algorithm can be used with this security profile.
   *  @param keyType public key algorithm type to be checked
   *  @return true if public key algorithm is allowable for this profile, false otherwise.
   */
  virtual OFBool isAllowableAlgorithmType(E_KeyType keyType) const;

  /** checks whether the given transfer syntax can be used with this security profile
   *  @param xfer transfer syntax to be checked
   *  @return true if transfer syntax is allowable for this profile, false otherwise.
   */
  virtual OFBool isAllowableTransferSyntax(E_TransferSyntax xfer) const;

  /** checks whether an attribute with the given tag is required to be signed
   *  for the current security profile.
   *  @param key tag key to be checked
   *  @return true if required, false otherwise.
   */
  virtual OFBool attributeRequired(const DcmTagKey& key) const;

  /** checks whether an attribute with the given tag must not be signed
   *  for the current security profile.
   *  @param key tag key to be checked
   *  @return true if attribute must not be signed, false otherwise.
   */
  virtual OFBool attributeForbidden(const DcmTagKey& key) const;

};

#endif
#endif