office-gobmx/xmlsecurity/source/xmlsec/nss/xmlencryption_nssimpl.cxx

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_xmlsecurity.hxx"
#include <sal/config.h>
#include <rtl/uuid.h>
#include "xmlencryption_nssimpl.hxx"

#include "xmldocumentwrapper_xmlsecimpl.hxx"

#include "xmlelementwrapper_xmlsecimpl.hxx"

#include "securityenvironment_nssimpl.hxx"
#include "errorcallback.hxx"

#include <sal/types.h>
//For reasons that escape me, this is what xmlsec does when size_t is not 4
#if SAL_TYPES_SIZEOFPOINTER != 4
#    define XMLSEC_NO_SIZE_T
#endif
#include "xmlsec/xmlsec.h"
#include "xmlsec/xmltree.h"
#include "xmlsec/xmlenc.h"
#include "xmlsec/crypto.h"

#ifdef UNX
#define stricmp strcasecmp
#endif

using namespace ::com::sun::star::uno ;
using namespace ::com::sun::star::lang ;
using ::com::sun::star::lang::XMultiServiceFactory ;
using ::com::sun::star::lang::XSingleServiceFactory ;
using ::rtl::OUString ;

using ::com::sun::star::xml::wrapper::XXMLElementWrapper ;
using ::com::sun::star::xml::wrapper::XXMLDocumentWrapper ;
using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
using ::com::sun::star::xml::crypto::XXMLEncryption ;
using ::com::sun::star::xml::crypto::XXMLEncryptionTemplate ;
using ::com::sun::star::xml::crypto::XXMLSecurityContext ;
using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
using ::com::sun::star::xml::crypto::XMLEncryptionException ;

XMLEncryption_NssImpl :: XMLEncryption_NssImpl( const Reference< XMultiServiceFactory >& aFactory ) : m_xServiceManager( aFactory ) {
}

XMLEncryption_NssImpl :: ~XMLEncryption_NssImpl() {
}

/* XXMLEncryption */
Reference< XXMLEncryptionTemplate >
SAL_CALL XMLEncryption_NssImpl :: encrypt(
    const Reference< XXMLEncryptionTemplate >& aTemplate ,
    const Reference< XSecurityEnvironment >& aEnvironment
) throw( com::sun::star::xml::crypto::XMLEncryptionException,
         com::sun::star::uno::SecurityException )
{
    xmlSecKeysMngrPtr pMngr = NULL ;
    xmlSecEncCtxPtr pEncCtx = NULL ;
    xmlNodePtr pEncryptedData = NULL ;
    xmlNodePtr pContent = NULL ;

    if( !aTemplate.is() )
        throw RuntimeException() ;

    if( !aEnvironment.is() )
        throw RuntimeException() ;

    //Get Keys Manager
    Reference< XUnoTunnel > xSecTunnel( aEnvironment , UNO_QUERY ) ;
    if( !xSecTunnel.is() ) {
         throw RuntimeException() ;
    }

#if 0
    XMLSecurityContext_NssImpl* pSecCtxt = ( XMLSecurityContext_NssImpl* )xSecTunnel->getSomething( XMLSecurityContext_NssImpl::getUnoTunnelId() ) ;
    if( pSecCtxt == NULL )
        throw RuntimeException() ;
#endif

    SecurityEnvironment_NssImpl* pSecEnv =
        reinterpret_cast<SecurityEnvironment_NssImpl*>(
            sal::static_int_cast<sal_uIntPtr>(xSecTunnel->getSomething( SecurityEnvironment_NssImpl::getUnoTunnelId() ))) ;
    if( pSecEnv == NULL )
        throw RuntimeException() ;

    //Get the encryption template
    Reference< XXMLElementWrapper > xTemplate = aTemplate->getTemplate() ;
    if( !xTemplate.is() ) {
        throw RuntimeException() ;
    }

    Reference< XUnoTunnel > xTplTunnel( xTemplate , UNO_QUERY ) ;
    if( !xTplTunnel.is() ) {
        throw RuntimeException() ;
    }

    XMLElementWrapper_XmlSecImpl* pTemplate =
        reinterpret_cast<XMLElementWrapper_XmlSecImpl*>(
            sal::static_int_cast<sal_uIntPtr>(
                xTplTunnel->getSomething( XMLElementWrapper_XmlSecImpl::getUnoTunnelImplementationId() )));
    if( pTemplate == NULL ) {
        throw RuntimeException() ;
    }

    //MM : Get the element to be encrypted
    Reference< XXMLElementWrapper > xTarget = aTemplate->getTarget() ;
    if( !xTarget.is() ) {
        throw XMLEncryptionException() ;
    }

    Reference< XUnoTunnel > xTgtTunnel( xTarget , UNO_QUERY ) ;
    if( !xTgtTunnel.is() ) {
        throw XMLEncryptionException() ;
    }

    XMLElementWrapper_XmlSecImpl* pTarget =
        reinterpret_cast<XMLElementWrapper_XmlSecImpl*>(
            sal::static_int_cast<sal_uIntPtr>(
                xTgtTunnel->getSomething( XMLElementWrapper_XmlSecImpl::getUnoTunnelImplementationId() )));
    if( pTarget == NULL ) {
        throw RuntimeException() ;
    }

    pContent = pTarget->getNativeElement() ;
    //MM : end

    if( pContent == NULL ) {
        throw XMLEncryptionException() ;
    }

    /* MM : remove the following 2 lines
    xmlUnlinkNode(pContent);
    xmlAddNextSibling(pEncryptedData, pContent);
    */

    //remember the position of the element to be signed
    sal_Bool isParentRef = sal_True;
    xmlNodePtr pParent = pEncryptedData->parent;
    xmlNodePtr referenceNode;

    if (pEncryptedData == pParent->children)
    {
        referenceNode = pParent;
    }
    else
    {
        referenceNode = pEncryptedData->prev;
        isParentRef = sal_False;
    }

     setErrorRecorder( );

    pMngr = pSecEnv->createKeysManager() ; //i39448
    if( !pMngr ) {
        throw RuntimeException() ;
    }

    //Create Encryption context
    pEncCtx = xmlSecEncCtxCreate( pMngr ) ;
    if( pEncCtx == NULL )
    {
        pSecEnv->destroyKeysManager( pMngr ) ; //i39448
        //throw XMLEncryptionException() ;
        clearErrorRecorder();
        return aTemplate;
    }

    pEncryptedData = pTemplate->getNativeElement() ;

    //Find the element to be encrypted.
    /* MM : remove the old method to get the target element
    //This element is wrapped in the CipherValue sub-element.
    xmlNodePtr pCipherData = pEncryptedData->children;
    while (pCipherData != NULL && stricmp((const char *)(pCipherData->name), "CipherData"))
    {
        pCipherData = pCipherData->next;
    }

    if( pCipherData == NULL ) {
        xmlSecEncCtxDestroy( pEncCtx ) ;
        throw XMLEncryptionException() ;
    }

    xmlNodePtr pCipherValue = pCipherData->children;
    while (pCipherValue != NULL && stricmp((const char *)(pCipherValue->name), "CipherValue"))
    {
        pCipherValue = pCipherValue->next;
    }

    if( pCipherValue == NULL ) {
        xmlSecEncCtxDestroy( pEncCtx ) ;
        throw XMLEncryptionException() ;
    }

    pContent = pCipherValue->children;
    */

    //Encrypt the template
    if( xmlSecEncCtxXmlEncrypt( pEncCtx , pEncryptedData , pContent ) < 0 )
    {
        xmlSecEncCtxDestroy( pEncCtx ) ;
        pSecEnv->destroyKeysManager( pMngr ) ; //i39448

        //throw XMLEncryptionException() ;
        clearErrorRecorder();
        return aTemplate;
    }

    xmlSecEncCtxDestroy( pEncCtx ) ;
    pSecEnv->destroyKeysManager( pMngr ) ; //i39448

    //get the new EncryptedData element
    if (isParentRef)
    {
        pTemplate->setNativeElement(referenceNode->children) ;
    }
    else
    {
        pTemplate->setNativeElement(referenceNode->next);
    }

    return aTemplate ;
}

/* XXMLEncryption */
Reference< XXMLEncryptionTemplate >
SAL_CALL XMLEncryption_NssImpl :: decrypt(
    const Reference< XXMLEncryptionTemplate >& aTemplate ,
    const Reference< XXMLSecurityContext >& aSecurityCtx
) throw( com::sun::star::xml::crypto::XMLEncryptionException ,
         com::sun::star::uno::SecurityException) {
    xmlSecKeysMngrPtr pMngr = NULL ;
    xmlSecEncCtxPtr pEncCtx = NULL ;
    xmlNodePtr pEncryptedData = NULL ;

    if( !aTemplate.is() )
        throw RuntimeException() ;

    if( !aSecurityCtx.is() )
        throw RuntimeException() ;

    //Get the encryption template
    Reference< XXMLElementWrapper > xTemplate = aTemplate->getTemplate() ;
    if( !xTemplate.is() ) {
        throw RuntimeException() ;
    }

    Reference< XUnoTunnel > xTplTunnel( xTemplate , UNO_QUERY ) ;
    if( !xTplTunnel.is() ) {
        throw RuntimeException() ;
    }

    XMLElementWrapper_XmlSecImpl* pTemplate =
        reinterpret_cast<XMLElementWrapper_XmlSecImpl*>(
            sal::static_int_cast<sal_uIntPtr>(
                xTplTunnel->getSomething( XMLElementWrapper_XmlSecImpl::getUnoTunnelImplementationId() )));
    if( pTemplate == NULL ) {
        throw RuntimeException() ;
    }

    pEncryptedData = pTemplate->getNativeElement() ;

    //remember the position of the element to be signed
    sal_Bool isParentRef = sal_True;
    xmlNodePtr pParent = pEncryptedData->parent;
    xmlNodePtr referenceNode;

    if (pEncryptedData == pParent->children)
    {
        referenceNode = pParent;
    }
    else
    {
        referenceNode = pEncryptedData->prev;
        isParentRef = sal_False;
    }

     setErrorRecorder( );

    sal_Int32 nSecurityEnvironment = aSecurityCtx->getSecurityEnvironmentNumber();
    sal_Int32 i;

    for (i=0; i<nSecurityEnvironment; ++i)
    {
        Reference< XSecurityEnvironment > aEnvironment = aSecurityCtx->getSecurityEnvironmentByIndex(i);

        //Get Keys Manager
        Reference< XUnoTunnel > xSecTunnel( aEnvironment , UNO_QUERY ) ;
        if( !aEnvironment.is() ) {
             throw RuntimeException() ;
        }

        SecurityEnvironment_NssImpl* pSecEnv =
            reinterpret_cast<SecurityEnvironment_NssImpl*>(
                sal::static_int_cast<sal_uIntPtr>(
                    xSecTunnel->getSomething( SecurityEnvironment_NssImpl::getUnoTunnelId() )));
        if( pSecEnv == NULL )
            throw RuntimeException() ;

        pMngr = pSecEnv->createKeysManager() ; //i39448
        if( !pMngr ) {
            throw RuntimeException() ;
        }

        //Create Encryption context
        pEncCtx = xmlSecEncCtxCreate( pMngr ) ;
        if( pEncCtx == NULL )
        {
            pSecEnv->destroyKeysManager( pMngr ) ; //i39448
            //throw XMLEncryptionException() ;
            clearErrorRecorder();
            return aTemplate;
        }

        //Decrypt the template
        if(!( xmlSecEncCtxDecrypt( pEncCtx , pEncryptedData ) < 0 || pEncCtx->result == NULL ))
        {
            //The decryption succeeds

            //Destroy the encryption context
            xmlSecEncCtxDestroy( pEncCtx ) ;
            pSecEnv->destroyKeysManager( pMngr ) ; //i39448

            //get the decrypted element
            XMLElementWrapper_XmlSecImpl * ret = new XMLElementWrapper_XmlSecImpl(isParentRef?
                (referenceNode->children):(referenceNode->next));

            //return ret;
            aTemplate->setTemplate(ret);
            break;
        }
        else
        {
            //The decryption fails, continue with the next security environment
            xmlSecEncCtxDestroy( pEncCtx ) ;
            pSecEnv->destroyKeysManager( pMngr ) ; //i39448
        }
    }

    clearErrorRecorder();
    return aTemplate;
}

/* XInitialization */
void SAL_CALL XMLEncryption_NssImpl :: initialize( const Sequence< Any >& /*aArguments*/ ) throw( Exception, RuntimeException ) {
    // TBD
} ;

/* XServiceInfo */
OUString SAL_CALL XMLEncryption_NssImpl :: getImplementationName() throw( RuntimeException ) {
    return impl_getImplementationName() ;
}

/* XServiceInfo */
sal_Bool SAL_CALL XMLEncryption_NssImpl :: supportsService( const OUString& serviceName) throw( RuntimeException ) {
    Sequence< OUString > seqServiceNames = getSupportedServiceNames() ;
    const OUString* pArray = seqServiceNames.getConstArray() ;
    for( sal_Int32 i = 0 ; i < seqServiceNames.getLength() ; i ++ ) {
        if( *( pArray + i ) == serviceName )
            return sal_True ;
    }
    return sal_False ;
}

/* XServiceInfo */
Sequence< OUString > SAL_CALL XMLEncryption_NssImpl :: getSupportedServiceNames() throw( RuntimeException ) {
    return impl_getSupportedServiceNames() ;
}

//Helper for XServiceInfo
Sequence< OUString > XMLEncryption_NssImpl :: impl_getSupportedServiceNames() {
    ::osl::Guard< ::osl::Mutex > aGuard( ::osl::Mutex::getGlobalMutex() ) ;
    Sequence< OUString > seqServiceNames( 1 ) ;
    seqServiceNames.getArray()[0] = OUString::createFromAscii( "com.sun.star.xml.crypto.XMLEncryption" ) ;
    return seqServiceNames ;
}

OUString XMLEncryption_NssImpl :: impl_getImplementationName() throw( RuntimeException ) {
    return OUString::createFromAscii( "com.sun.star.xml.security.bridge.xmlsec.XMLEncryption_NssImpl" ) ;
}

//Helper for registry
Reference< XInterface > SAL_CALL XMLEncryption_NssImpl :: impl_createInstance( const Reference< XMultiServiceFactory >& aServiceManager ) throw( RuntimeException ) {
    return Reference< XInterface >( *new XMLEncryption_NssImpl( aServiceManager ) ) ;
}

Reference< XSingleServiceFactory > XMLEncryption_NssImpl :: impl_createFactory( const Reference< XMultiServiceFactory >& aServiceManager ) {
    //Reference< XSingleServiceFactory > xFactory ;
    //xFactory = ::cppu::createSingleFactory( aServiceManager , impl_getImplementationName , impl_createInstance , impl_getSupportedServiceNames ) ;
    //return xFactory ;
    return ::cppu::createSingleFactory( aServiceManager , impl_getImplementationName() , impl_createInstance , impl_getSupportedServiceNames() ) ;
}