ExtractEncryptedContent.cxx
/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmReader.h"
#include <fstream>
/*
openssl smime -encrypt -binary -aes256 -in outputfile.dcm -inform DER -out outputfile.der -outform DER ../trunk/Testing/Source/Data/certificate.pem
openssl smime -decrypt -binary -in out.der -inform DER -out outputfile.dcm -outform DER -inkey ../trunk/Testing/Source/Data/privatekey.pem ../trunk/Testing/Source/Data/certificate.pem
*/
int main(int argc, char *argv[])
{
if( argc < 3 )
{
std::cerr << argv[0] << " input.dcm output.der" << std::endl;
return 1;
}
const char *filename = argv[1];
const char *outfilename = argv[2];
gdcm::Reader reader;
reader.SetFileName( filename );
if( !reader.Read() )
{
return 1;
}
gdcm::File &file = reader.GetFile();
gdcm::DataSet &ds = file.GetDataSet();
const gdcm::DataElement &EncryptedAttributesSequence = ds.GetDataElement( gdcm::Tag( 0x0400,0x0500 ) );
gdcm::SequenceOfItems *sqi = EncryptedAttributesSequence.GetValueAsSQ();
if ( !sqi || sqi->GetNumberOfItems() != 1 ) return 1;
gdcm::Item &item = sqi->GetItem(1);
gdcm::DataSet &nestedds = item.GetNestedDataSet();
if( ! nestedds.FindDataElement( gdcm::Tag( 0x0400,0x0520) ) ) return 1;
const gdcm::DataElement &EncryptedContent = nestedds.GetDataElement( gdcm::Tag( 0x0400,0x0520) );
const gdcm::ByteValue *bv = EncryptedContent.GetByteValue();
std::ofstream of( outfilename, std::ios::binary );
of.write( bv->GetPointer(), bv->GetLength() );
of.close();
return 0;
}
gdcm::ByteValue
Class to represent binary value (array of bytes).
Definition gdcmByteValue.h:35
gdcm::ByteValue::GetPointer
const char * GetPointer() const
Definition gdcmByteValue.h:110
gdcm::ByteValue::GetLength
VL GetLength() const override
Definition gdcmByteValue.h:77
gdcm::DataElement
Class to represent a Data Element either Implicit or Explicit.
Definition gdcmDataElement.h:59
gdcm::DataElement::GetByteValue
const ByteValue * GetByteValue() const
Definition gdcmDataElement.h:133
gdcm::DataElement::GetValueAsSQ
SmartPointer< SequenceOfItems > GetValueAsSQ() const
gdcm::DataSet
Class to represent a Data Set (which contains Data Elements).
Definition gdcmDataSet.h:56
gdcm::DataSet::GetDataElement
const DataElement & GetDataElement(const Tag &t) const
Definition gdcmDataSet.h:188
gdcm::DataSet::FindDataElement
bool FindDataElement(const PrivateTag &t) const
Look up if private tag 't' is present in the dataset:
gdcm::File
a DICOM File
Definition gdcmFile.h:34
gdcm::File::GetDataSet
const DataSet & GetDataSet() const
Get Data Set.
Definition gdcmFile.h:57
gdcm::Item
Class to represent an Item.
Definition gdcmItem.h:46
gdcm::Item::GetNestedDataSet
const DataSet & GetNestedDataSet() const
Definition gdcmItem.h:80
gdcm::Reader
Reader ala DOM (Document Object Model).
Definition gdcmReader.h:54
gdcm::Reader::GetFile
const File & GetFile() const
Set/Get File.
Definition gdcmReader.h:72
gdcm::Reader::Read
virtual bool Read()
Main function to read a file.
gdcm::Reader::SetFileName
void SetFileName(const char *filename_native)
gdcm::SequenceOfItems
Class to represent a Sequence Of Items.
Definition gdcmSequenceOfItems.h:40
gdcm::SequenceOfItems::GetNumberOfItems
SizeType GetNumberOfItems() const
Definition gdcmSequenceOfItems.h:86
gdcm::SequenceOfItems::GetItem
const Item & GetItem(SizeType position) const
gdcm::Tag
Class to represent a DICOM Data Element (Attribute) Tag (Group, Element).
Definition gdcmTag.h:39
gdcmReader.h