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path: root/sdext/source/pdfimport/pdfparse/pdfentries.cxx
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-rw-r--r--sdext/source/pdfimport/pdfparse/pdfentries.cxx147
1 files changed, 132 insertions, 15 deletions
diff --git a/sdext/source/pdfimport/pdfparse/pdfentries.cxx b/sdext/source/pdfimport/pdfparse/pdfentries.cxx
index a2ff6b996ff2..e741d7499915 100644
--- a/sdext/source/pdfimport/pdfparse/pdfentries.cxx
+++ b/sdext/source/pdfimport/pdfparse/pdfentries.cxx
@@ -32,6 +32,7 @@
#include <rtl/strbuf.hxx>
#include <rtl/ustring.hxx>
+#include <rtl/ustrbuf.hxx>
#include <rtl/alloc.h>
#include <rtl/digest.h>
#include <rtl/cipher.h>
@@ -59,6 +60,8 @@ struct EmitImplData
XRefTable m_aXRefTable;
// container of all indirect objects (usually a PDFFile*)
const PDFContainer* m_pObjectContainer;
+ unsigned int m_nDecryptObject;
+ unsigned int m_nDecryptGeneration;
// returns true if the xref table was updated
bool insertXref( unsigned int nObject, unsigned int nGeneration, unsigned int nOffset )
@@ -80,7 +83,9 @@ struct EmitImplData
}
EmitImplData( const PDFContainer* pTopContainer ) :
- m_pObjectContainer( pTopContainer )
+ m_pObjectContainer( pTopContainer ),
+ m_nDecryptObject( 0 ),
+ m_nDecryptGeneration( 0 )
{}
~EmitImplData() {}
bool decrypt( const sal_uInt8* pInBuffer, sal_uInt32 nLen, sal_uInt8* pOutBuffer,
@@ -89,6 +94,12 @@ struct EmitImplData
const PDFFile* pFile = dynamic_cast<const PDFFile*>(m_pObjectContainer);
return pFile ? pFile->decrypt( pInBuffer, nLen, pOutBuffer, nObject, nGeneration ) : false;
}
+
+ void setDecryptObject( unsigned int nObject, unsigned int nGeneration )
+ {
+ m_nDecryptObject = nObject;
+ m_nDecryptGeneration = nGeneration;
+ }
};
}
@@ -199,6 +210,46 @@ bool PDFString::emit( EmitContext& rWriteContext ) const
{
if( ! rWriteContext.write( " ", 1 ) )
return false;
+ EmitImplData* pEData = getEmitData( rWriteContext );
+ if( rWriteContext.m_bDecrypt && pEData && pEData->m_nDecryptObject )
+ {
+ OString aFiltered( getFilteredString() );
+ // decrypt inplace (evil since OString is supposed to be const
+ // however in this case we know that getFilteredString returned a singular string instance
+ pEData->decrypt( (sal_uInt8*)aFiltered.getStr(), aFiltered.getLength(),
+ (sal_uInt8*)aFiltered.getStr(),
+ pEData->m_nDecryptObject, pEData->m_nDecryptGeneration );
+ // check for string or hex string
+ const sal_Char* pStr = aFiltered.getStr();
+ if( aFiltered.getLength() > 1 &&
+ ( (pStr[0] == sal_Char(0xff) && pStr[1] == sal_Char(0xfe)) ||
+ (pStr[0] == sal_Char(0xfe) && pStr[1] == sal_Char(0xff)) ) )
+ {
+ static const char pHexTab[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+ if( ! rWriteContext.write( "<", 1 ) )
+ return false;
+ for( sal_Int32 i = 0; i < aFiltered.getLength(); i++ )
+ {
+ if( ! rWriteContext.write( pHexTab + ((sal_uInt32(pStr[i]) >> 4) & 0x0f), 1 ) )
+ return false;
+ if( ! rWriteContext.write( pHexTab + (sal_uInt32(pStr[i]) & 0x0f), 1 ) )
+ return false;
+ }
+ if( ! rWriteContext.write( ">", 1 ) )
+ return false;
+ }
+ else
+ {
+ if( ! rWriteContext.write( "(", 1 ) )
+ return false;
+ if( ! rWriteContext.write( aFiltered.getStr(), aFiltered.getLength() ) )
+ return false;
+ if( ! rWriteContext.write( ")", 1 ) )
+ return false;
+ }
+ return true;
+ }
return rWriteContext.write( m_aString.getStr(), m_aString.getLength() );
}
@@ -418,6 +469,15 @@ bool PDFContainer::emitSubElements( EmitContext& rWriteContext ) const
int nEle = m_aSubElements.size();
for( int i = 0; i < nEle; i++ )
{
+ if( rWriteContext.m_bDecrypt )
+ {
+ const PDFName* pName = dynamic_cast<PDFName*>(m_aSubElements[i]);
+ if( pName && pName->m_aName.equals( rtl::OString("Encrypt") ) )
+ {
+ i++;
+ continue;
+ }
+ }
if( ! m_aSubElements[i]->emit( rWriteContext ) )
return false;
}
@@ -735,7 +795,7 @@ bool PDFObject::writeStream( EmitContext& rWriteContext, const PDFFile* pParsedF
{
char* pStream = NULL;
unsigned int nBytes = 0;
- if( getDeflatedStream( &pStream, &nBytes, pParsedFile, rWriteContext ) && nBytes )
+ if( getDeflatedStream( &pStream, &nBytes, pParsedFile, rWriteContext ) && nBytes && rWriteContext.m_bDeflate )
{
sal_uInt8* pOutBytes = NULL;
sal_uInt32 nOutBytes = 0;
@@ -767,17 +827,27 @@ bool PDFObject::emit( EmitContext& rWriteContext ) const
if( ! rWriteContext.write( aBuf.getStr(), aBuf.getLength() ) )
return false;
- if( rWriteContext.m_bDeflate && pEData )
+ if( pEData )
+ pEData->setDecryptObject( m_nNumber, m_nGeneration );
+ if( (rWriteContext.m_bDeflate || rWriteContext.m_bDecrypt) && pEData )
{
char* pStream = NULL;
unsigned int nBytes = 0;
- if( getDeflatedStream( &pStream, &nBytes, pEData->m_pObjectContainer, rWriteContext )
- && pStream && nBytes )
+ bool bDeflate = getDeflatedStream( &pStream, &nBytes, pEData->m_pObjectContainer, rWriteContext );
+ if( pStream && nBytes )
{
// unzip the stream
sal_uInt8* pOutBytes = NULL;
sal_uInt32 nOutBytes = 0;
- unzipToBuffer( pStream, nBytes, &pOutBytes, &nOutBytes );
+ if( bDeflate && rWriteContext.m_bDeflate )
+ unzipToBuffer( pStream, nBytes, &pOutBytes, &nOutBytes );
+ else
+ {
+ // nothing to deflate, but decryption has happened
+ pOutBytes = (sal_uInt8*)pStream;
+ nOutBytes = (sal_uInt32)nBytes;
+ }
+
if( nOutBytes )
{
// clone this object
@@ -785,8 +855,32 @@ bool PDFObject::emit( EmitContext& rWriteContext ) const
// set length in the dictionary to new stream length
PDFNumber* pNewLen = new PDFNumber( double(nOutBytes) );
pClone->m_pStream->m_pDict->insertValue( "Length", pNewLen );
- // delete flatedecode filter
- pClone->m_pStream->m_pDict->eraseValue( "Filter" );
+
+ if( bDeflate && rWriteContext.m_bDeflate )
+ {
+ // delete flatedecode filter
+ std::hash_map<OString,PDFEntry*,OStringHash>::const_iterator it =
+ pClone->m_pStream->m_pDict->m_aMap.find( "Filter" );
+ if( it != pClone->m_pStream->m_pDict->m_aMap.end() )
+ {
+ PDFName* pFilter = dynamic_cast<PDFName*>(it->second);
+ if( pFilter && pFilter->m_aName.equals( "FlateDecode" ) )
+ pClone->m_pStream->m_pDict->eraseValue( "Filter" );
+ else
+ {
+ PDFArray* pArray = dynamic_cast<PDFArray*>(it->second);
+ if( pArray && ! pArray->m_aSubElements.empty() )
+ {
+ pFilter = dynamic_cast<PDFName*>(pArray->m_aSubElements.front());
+ if( pFilter && pFilter->m_aName.equals( "FlateDecode" ) )
+ {
+ delete pFilter;
+ pArray->m_aSubElements.erase( pArray->m_aSubElements.begin() );
+ }
+ }
+ }
+ }
+ }
// write sub elements except stream
bool bRet = true;
@@ -805,17 +899,23 @@ bool PDFObject::emit( EmitContext& rWriteContext ) const
if( bRet )
bRet = rWriteContext.write( "\nendstream\nendobj\n", 18 );
rtl_freeMemory( pStream );
- rtl_freeMemory( pOutBytes );
+ if( pOutBytes != (sal_uInt8*)pStream )
+ rtl_freeMemory( pOutBytes );
+ if( pEData )
+ pEData->setDecryptObject( 0, 0 );
return bRet;
}
- rtl_freeMemory( pOutBytes );
+ if( pOutBytes != (sal_uInt8*)pStream )
+ rtl_freeMemory( pOutBytes );
}
rtl_freeMemory( pStream );
}
- if( ! emitSubElements( rWriteContext ) )
- return false;
- return rWriteContext.write( "\nendobj\n", 8 );
+ bool bRet = emitSubElements( rWriteContext ) &&
+ rWriteContext.write( "\nendobj\n", 8 );
+ if( pEData )
+ pEData->setDecryptObject( 0, 0 );
+ return bRet;
}
PDFEntry* PDFObject::clone() const
@@ -1178,6 +1278,23 @@ bool PDFFile::setupDecryptionData( const OString& rPwd ) const
return bValid;
}
+rtl::OUString PDFFile::getDecryptionKey() const
+{
+ rtl::OUStringBuffer aBuf( ENCRYPTION_KEY_LEN * 2 );
+ if( impl_getData()->m_bIsEncrypted )
+ {
+ for( sal_uInt32 i = 0; i < m_pData->m_nKeyLength; i++ )
+ {
+ static const sal_Unicode pHexTab[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+ aBuf.append( pHexTab[(m_pData->m_aDecryptionKey[i] >> 4) & 0x0f] );
+ aBuf.append( pHexTab[(m_pData->m_aDecryptionKey[i] & 0x0f)] );
+ }
+
+ }
+ return aBuf.makeStringAndClear();
+}
+
PDFFileImplData* PDFFile::impl_getData() const
{
if( m_pData )
@@ -1304,13 +1421,13 @@ PDFFileImplData* PDFFile::impl_getData() const
if( pNum )
m_pData->m_nPEntry = static_cast<sal_uInt32>(static_cast<sal_Int32>(pNum->m_fValue));
#if OSL_DEBUG_LEVEL > 1
- fprintf( stderr, "p entry is %p\n", m_pData->m_nPEntry );
+ fprintf( stderr, "p entry is %p\n", (void*)m_pData->m_nPEntry );
#endif
}
#if OSL_DEBUG_LEVEL > 1
fprintf( stderr, "Encryption dict: sec handler: %s, version = %d, revision = %d, key length = %d\n",
pFilter ? OUStringToOString( pFilter->getFilteredName(), RTL_TEXTENCODING_UTF8 ).getStr() : "<unknown>",
- (int)m_pData->m_nAlgoVersion, (int)m_pData->m_nStandardRevision, m_pData->m_nKeyLength );
+ (int)m_pData->m_nAlgoVersion, (int)m_pData->m_nStandardRevision, (int)m_pData->m_nKeyLength );
#endif
break;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-12 01:18:17 +0000