1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "nssrenam.h"
#include <cert.h>
#include <secerr.h>
#include <ocsp.h>

#include <sal/config.h>
#include <sal/macros.h>
#include <osl/diagnose.h>
#include "securityenvironment_nssimpl.hxx"
#include <cppuhelper/supportsservice.hxx>
#include <comphelper/servicehelper.hxx>

#include <xmlsec-wrapper.h>

#include <rtl/ustrbuf.hxx>
#include <comphelper/processfactory.hxx>
#include <comphelper/docpasswordrequest.hxx>
#include <sal/log.hxx>
#include <com/sun/star/task/InteractionHandler.hpp>
#include <vector>
#include <memory>
#include <osl/thread.h>
#include <comphelper/sequence.hxx>

#include "x509certificate_nssimpl.hxx"
#include "secerror.hxx"
#include <prerror.h>
#include <keyhi.h>

// added for password exception
#include <com/sun/star/security/NoPasswordException.hpp>
#include <com/sun/star/security/CertificateCharacters.hpp>
#include <com/sun/star/security/CertificateValidity.hpp>

namespace csss = ::com::sun::star::security;
using namespace ::com::sun::star::security;
using namespace com::sun::star;
using namespace ::com::sun::star::uno ;
using namespace ::com::sun::star::lang ;

using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
using ::com::sun::star::security::XCertificate ;

namespace std
{
template <> struct default_delete<PRArenaPool>
{
    void operator()(PRArenaPool* ptr) { PORT_FreeArena(ptr, PR_FALSE); }
};
}

static X509Certificate_NssImpl* NssCertToXCert( CERTCertificate* cert ) ;
static X509Certificate_NssImpl* NssPrivKeyToXCert( SECKEYPrivateKey* ) ;

namespace {

struct UsageDescription
{
    SECCertificateUsage usage;
    char const* description;

    UsageDescription()
    : usage( certificateUsageCheckAllUsages )
    , description( nullptr )
    {}

    UsageDescription( SECCertificateUsage i_usage, char const* i_description )
    : usage( i_usage )
    , description( i_description )
    {}
};

}

static char* GetPasswordFunction( PK11SlotInfo* pSlot, PRBool bRetry, void* /*arg*/ )
{
    uno::Reference< uno::XComponentContext > xContext( ::comphelper::getProcessComponentContext() );
    uno::Reference < task::XInteractionHandler2 > xInteractionHandler(
        task::InteractionHandler::createWithParent(xContext, nullptr) );

    task::PasswordRequestMode eMode = bRetry ? task::PasswordRequestMode_PASSWORD_REENTER : task::PasswordRequestMode_PASSWORD_ENTER;
    ::comphelper::DocPasswordRequest* pPasswordRequest = new ::comphelper::DocPasswordRequest(
        ::comphelper::DocPasswordRequestType::Standard, eMode, OUString::createFromAscii(PK11_GetTokenName(pSlot)) );

    uno::Reference< task::XInteractionRequest > xRequest( pPasswordRequest );
    xInteractionHandler->handle( xRequest );

    if ( pPasswordRequest->isPassword() )
    {
        OString aPassword(OUStringToOString(
            pPasswordRequest->getPassword(),
            osl_getThreadTextEncoding()));
        sal_Int32 nLen = aPassword.getLength();
        char* pPassword = static_cast<char*>(PORT_Alloc( nLen+1 ) );
        pPassword[nLen] = 0;
        memcpy( pPassword, aPassword.getStr(), nLen );
        return pPassword;
    }
    return nullptr;
}

SecurityEnvironment_NssImpl::SecurityEnvironment_NssImpl() :
m_pHandler( nullptr ) , m_tSymKeyList() {
    PK11_SetPasswordFunc( GetPasswordFunction ) ;
}

SecurityEnvironment_NssImpl::~SecurityEnvironment_NssImpl() {

    PK11_SetPasswordFunc( nullptr ) ;

    for (auto& slot : m_Slots)
    {
        PK11_FreeSlot(slot);
    }

    for( auto& symKey : m_tSymKeyList )
        PK11_FreeSymKey( symKey ) ;
}

/* XServiceInfo */
OUString SAL_CALL SecurityEnvironment_NssImpl::getImplementationName() {
    return "com.sun.star.xml.crypto.SecurityEnvironment";
}

/* XServiceInfo */
sal_Bool SAL_CALL SecurityEnvironment_NssImpl::supportsService( const OUString& serviceName) {
    return cppu::supportsService(this, serviceName);
}

/* XServiceInfo */
Sequence< OUString > SAL_CALL SecurityEnvironment_NssImpl::getSupportedServiceNames() {
    Sequence<OUString> seqServiceNames{ "com.sun.star.xml.crypto.SecurityEnvironment" };
    return seqServiceNames;
}

/* XUnoTunnel */
sal_Int64 SAL_CALL SecurityEnvironment_NssImpl::getSomething( const Sequence< sal_Int8 >& aIdentifier )
{
    if( isUnoTunnelId<SecurityEnvironment_NssImpl>(aIdentifier) ) {
        return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_uIntPtr>(this));
    }
    return 0 ;
}

/* XUnoTunnel extension */

namespace
{
    class theSecurityEnvironment_NssImplUnoTunnelId  : public rtl::Static< UnoTunnelIdInit, theSecurityEnvironment_NssImplUnoTunnelId > {};
}

const Sequence< sal_Int8>& SecurityEnvironment_NssImpl::getUnoTunnelId() {
    return theSecurityEnvironment_NssImplUnoTunnelId::get().getSeq();
}

OUString SecurityEnvironment_NssImpl::getSecurityEnvironmentInformation()
{
    OUStringBuffer buff;
    for (auto& slot : m_Slots)
    {
        buff.append(OUString::createFromAscii(PK11_GetTokenName(slot)));
        buff.append("\n");
    }
    return buff.makeStringAndClear();
}

void SecurityEnvironment_NssImpl::addCryptoSlot( PK11SlotInfo* aSlot)
{
    PK11_ReferenceSlot(aSlot);
    m_Slots.push_back(aSlot);
}

//Could we have multiple cert dbs?
void SecurityEnvironment_NssImpl::setCertDb( CERTCertDBHandle* aCertDb ) {
    m_pHandler = aCertDb ;
}

void SecurityEnvironment_NssImpl::adoptSymKey( PK11SymKey* aSymKey ) {
    if( aSymKey != nullptr ) {
        //First try to find the key in the list
        if (std::find(m_tSymKeyList.begin(), m_tSymKeyList.end(), aSymKey) != m_tSymKeyList.end())
            return;

        //If we do not find the key in the list, add a new node
        PK11SymKey* symkey = PK11_ReferenceSymKey( aSymKey ) ;
        if( symkey == nullptr )
            throw RuntimeException() ;

        try {
            m_tSymKeyList.push_back( symkey ) ;
        } catch ( Exception& ) {
            PK11_FreeSymKey( symkey ) ;
        }
    }
}

void SecurityEnvironment_NssImpl::updateSlots()
{
    //In case new tokens are present then we can obtain the corresponding slot
    osl::MutexGuard guard(m_mutex);

    m_Slots.clear();
    m_tSymKeyList.clear();

    PK11SlotList * soltList = PK11_GetAllTokens( CKM_INVALID_MECHANISM, PR_FALSE, PR_FALSE, nullptr ) ;
    if( soltList != nullptr )
    {
        for (PK11SlotListElement* soltEle = soltList->head ; soltEle != nullptr; soltEle = soltEle->next)
        {
            PK11SlotInfo * pSlot = soltEle->slot ;

            if(pSlot != nullptr)
            {
                SAL_INFO(
                    "xmlsecurity.xmlsec",
                    "Found a slot: SlotName=" << PK11_GetSlotName(pSlot)
                        << ", TokenName=" << PK11_GetTokenName(pSlot));

//The following code which is commented out checks if a slot, that is a smart card for example, is
//              able to generate a symmetric key of type CKM_DES3_CBC. If this fails then this token
//              will not be used. This key is possibly used for the encryption service. However, all
//              interfaces and services used for public key signature and encryption are not published
//              and the encryption is not used in OOo. Therefore it does not do any harm to remove
//              this code, hence allowing smart cards which cannot generate this type of key.
//
//              By doing this, the encryption may fail if a smart card is being used which does not
//              support this key generation.
//
                PK11SymKey * pSymKey = PK11_KeyGen( pSlot , CKM_DES3_CBC, nullptr, 128, nullptr ) ;
//              if( pSymKey == NULL )
//              {
//                  PK11_FreeSlot( pSlot ) ;
//                  SAL_INFO( "xmlsecurity", "XMLSEC: Error - pSymKey is NULL" );
//                  continue;
//              }
                addCryptoSlot(pSlot);
                PK11_FreeSlot( pSlot ) ;
                pSlot = nullptr;

                if (pSymKey != nullptr)
                {
                    adoptSymKey( pSymKey ) ;
                    PK11_FreeSymKey( pSymKey ) ;
                    pSymKey = nullptr;
                }

            }// end of if(pSlot != NULL)
        }// end of for
    }// end of if( soltList != NULL )
}

Sequence< Reference < XCertificate > >
SecurityEnvironment_NssImpl::getPersonalCertificates()
{
    sal_Int32 length ;
    X509Certificate_NssImpl* xcert ;
    std::vector< X509Certificate_NssImpl* > certsList ;

    updateSlots();
    //firstly, we try to find private keys in slot
    for (auto& slot : m_Slots)
    {
        SECKEYPrivateKeyList* priKeyList ;

        if( PK11_NeedLogin(slot ) ) {
            SECStatus nRet = PK11_Authenticate(slot, PR_TRUE, nullptr);
            //PK11_Authenticate may fail in case the a slot has not been initialized.
            //this is the case if the user has a new profile, so that they have never
            //added a personal certificate.
            if( nRet != SECSuccess && PORT_GetError() != SEC_ERROR_IO) {
                throw NoPasswordException();
            }
        }

        priKeyList = PK11_ListPrivateKeysInSlot(slot) ;
        if( priKeyList != nullptr )
        {
            for (SECKEYPrivateKeyListNode* curPri = PRIVKEY_LIST_HEAD(priKeyList);
                !PRIVKEY_LIST_END( curPri, priKeyList ) && curPri != nullptr;
                curPri = PRIVKEY_LIST_NEXT(curPri))
            {
                xcert = NssPrivKeyToXCert( curPri->key ) ;
                if( xcert != nullptr )
                    certsList.push_back( xcert ) ;
            }
            SECKEY_DestroyPrivateKeyList( priKeyList ) ;
        }


    }

    length = certsList.size() ;
    if( length != 0 ) {
        int i = 0;
        Sequence< Reference< XCertificate > > certSeq( length ) ;

        for( const auto& rXCert : certsList ) {
            certSeq[i] = rXCert ;
            ++i;
        }

        return certSeq ;
    }

    return Sequence< Reference < XCertificate > > ();
}

Reference< XCertificate > SecurityEnvironment_NssImpl::getCertificate( const OUString& issuerName, const Sequence< sal_Int8 >& serialNumber )
{
    X509Certificate_NssImpl* xcert = nullptr;

    if( m_pHandler != nullptr ) {
        CERTIssuerAndSN issuerAndSN ;
        CERTCertificate* cert ;
        CERTName* nmIssuer ;
        char* chIssuer ;
        SECItem* derIssuer ;
        std::unique_ptr<PRArenaPool> arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
        if( arena == nullptr )
            throw RuntimeException() ;

        // Create cert info from issue and serial
        OString ostr = OUStringToOString( issuerName , RTL_TEXTENCODING_UTF8 ) ;
        chIssuer = PL_strndup( ostr.getStr(), static_cast<int>(ostr.getLength()) ) ;
        nmIssuer = CERT_AsciiToName( chIssuer ) ;
        if( nmIssuer == nullptr ) {
            PL_strfree( chIssuer ) ;
            return nullptr; // no need for exception cf. i40394
        }

        derIssuer = SEC_ASN1EncodeItem( arena.get(), nullptr, static_cast<void*>(nmIssuer), SEC_ASN1_GET( CERT_NameTemplate ) ) ;
        if( derIssuer == nullptr ) {
            PL_strfree( chIssuer ) ;
            CERT_DestroyName( nmIssuer ) ;
            throw RuntimeException() ;
        }

        memset( &issuerAndSN, 0, sizeof( issuerAndSN ) ) ;

        issuerAndSN.derIssuer.data = derIssuer->data ;
        issuerAndSN.derIssuer.len = derIssuer->len ;

        issuerAndSN.serialNumber.data = reinterpret_cast<unsigned char *>(const_cast<sal_Int8 *>(serialNumber.getConstArray()));
        issuerAndSN.serialNumber.len = serialNumber.getLength() ;

        cert = CERT_FindCertByIssuerAndSN( m_pHandler, &issuerAndSN ) ;
        if( cert != nullptr ) {
            xcert = NssCertToXCert( cert ) ;
        } else {
            xcert = nullptr ;
        }

        PL_strfree( chIssuer ) ;
        CERT_DestroyName( nmIssuer ) ;
        //SECITEM_FreeItem( derIssuer, PR_FALSE ) ;
        CERT_DestroyCertificate( cert ) ;
    } else {
        xcert = nullptr ;
    }

    return xcert ;
}

Sequence< Reference < XCertificate > > SecurityEnvironment_NssImpl::buildCertificatePath( const Reference< XCertificate >& begin ) {
    // Remember the signing certificate.
    m_xSigningCertificate = begin;

    const X509Certificate_NssImpl* xcert ;
    const CERTCertificate* cert ;
    CERTCertList* certChain ;

    Reference< XUnoTunnel > xCertTunnel( begin, UNO_QUERY_THROW ) ;
    xcert = reinterpret_cast<X509Certificate_NssImpl*>(
        sal::static_int_cast<sal_uIntPtr>(xCertTunnel->getSomething( X509Certificate_NssImpl::getUnoTunnelId() ))) ;
    if( xcert == nullptr ) {
        throw RuntimeException() ;
    }

    cert = xcert->getNssCert() ;
    if( cert != nullptr ) {
        int64 timeboundary ;

        //Get the system clock time
        timeboundary = PR_Now() ;

        certChain = CERT_GetCertChainFromCert( const_cast<CERTCertificate*>(cert), timeboundary, certUsageAnyCA ) ;
    } else {
        certChain = nullptr ;
    }

    if( certChain != nullptr ) {
        std::vector<uno::Reference<security::XCertificate>> aCertChain;

        for (CERTCertListNode* node = CERT_LIST_HEAD(certChain); !CERT_LIST_END(node, certChain); node = CERT_LIST_NEXT(node)) {
            X509Certificate_NssImpl* pCert = new X509Certificate_NssImpl();
            if( pCert == nullptr ) {
                CERT_DestroyCertList( certChain ) ;
                throw RuntimeException() ;
            }

            pCert->setCert( node->cert ) ;

            aCertChain.push_back(pCert);
        }

        CERT_DestroyCertList( certChain ) ;

        return comphelper::containerToSequence(aCertChain);
    }

    return Sequence< Reference < XCertificate > >();
}

X509Certificate_NssImpl* SecurityEnvironment_NssImpl::createAndAddCertificateFromPackage(
                                                        const css::uno::Sequence<sal_Int8>& raDERCertificate,
                                                        OUString const & raString)
{
    auto pCertificateBytes = reinterpret_cast<char *>(const_cast<sal_Int8 *>(raDERCertificate.getConstArray()));
    CERTCertificate* pCERTCertificate = CERT_DecodeCertFromPackage(pCertificateBytes, raDERCertificate.getLength());

    if (!pCERTCertificate)
        return nullptr;

    SECStatus aStatus;

    OString aTrustString = OUStringToOString(raString, RTL_TEXTENCODING_ASCII_US);
    CERTCertTrust aTrust;

    aStatus = CERT_DecodeTrustString(&aTrust, aTrustString.getStr());

    if (aStatus != SECSuccess)
        return nullptr;

    PK11SlotInfo* pSlot = PK11_GetInternalKeySlot();

    if (!pSlot)
        return nullptr;

    aStatus = PK11_ImportCert(pSlot, pCERTCertificate, CK_INVALID_HANDLE, nullptr, PR_FALSE);

    if (aStatus != SECSuccess)
        return nullptr;

    aStatus = CERT_ChangeCertTrust(CERT_GetDefaultCertDB(), pCERTCertificate, &aTrust);

    if (aStatus != SECSuccess)
        return nullptr;


    PK11_FreeSlot(pSlot);

    X509Certificate_NssImpl* pX509Certificate = new X509Certificate_NssImpl();
    pX509Certificate->setCert(pCERTCertificate);
    return pX509Certificate;
}

X509Certificate_NssImpl* SecurityEnvironment_NssImpl::createX509CertificateFromDER(const css::uno::Sequence<sal_Int8>& aDerCertificate)
{
    X509Certificate_NssImpl* pX509Certificate = nullptr;

    if (aDerCertificate.hasElements())
    {
        pX509Certificate = new X509Certificate_NssImpl();
        if (pX509Certificate == nullptr)
            throw RuntimeException();
        pX509Certificate->setRawCert(aDerCertificate);
    }
    return pX509Certificate;
}

Reference<XCertificate> SecurityEnvironment_NssImpl::createCertificateFromRaw(const Sequence< sal_Int8 >& rawCertificate)
{
    return createX509CertificateFromDER(rawCertificate);
}

Reference< XCertificate > SecurityEnvironment_NssImpl::createCertificateFromAscii( const OUString& asciiCertificate )
{
    OString oscert = OUStringToOString( asciiCertificate , RTL_TEXTENCODING_ASCII_US ) ;
    xmlChar* chCert = xmlStrndup( reinterpret_cast<const xmlChar*>(oscert.getStr()), static_cast<int>(oscert.getLength()) ) ;
    int certSize = xmlSecBase64Decode( chCert, reinterpret_cast<xmlSecByte*>(chCert), xmlStrlen( chCert ) ) ;
    if (certSize > 0)
    {
        Sequence< sal_Int8 > rawCert(certSize) ;
        for (int i = 0 ; i < certSize; ++i)
            rawCert[i] = *( chCert + i ) ;

        xmlFree( chCert ) ;

        return createCertificateFromRaw( rawCert ) ;
    }
    else
    {
        return nullptr;
    }
}

sal_Int32 SecurityEnvironment_NssImpl ::
verifyCertificate( const Reference< csss::XCertificate >& aCert,
                   const Sequence< Reference< csss::XCertificate > >&  intermediateCerts )
{
    sal_Int32 validity = csss::CertificateValidity::INVALID;
    const X509Certificate_NssImpl* xcert ;
    const CERTCertificate* cert ;
    ::std::vector<CERTCertificate*> vecTmpNSSCertificates;
    Reference< XUnoTunnel > xCertTunnel( aCert, UNO_QUERY_THROW ) ;

    SAL_INFO("xmlsecurity.xmlsec", "Start verification of certificate: " << aCert->getSubjectName());

    xcert = reinterpret_cast<X509Certificate_NssImpl*>(
       sal::static_int_cast<sal_uIntPtr>(xCertTunnel->getSomething( X509Certificate_NssImpl::getUnoTunnelId() ))) ;
    if( xcert == nullptr ) {
        throw RuntimeException() ;
    }

    //CERT_PKIXVerifyCert does not take a db as argument. It will therefore
    //internally use CERT_GetDefaultCertDB
    //Make sure m_pHandler is the default DB
    OSL_ASSERT(m_pHandler == CERT_GetDefaultCertDB());
    CERTCertDBHandle * certDb = m_pHandler != nullptr ? m_pHandler : CERT_GetDefaultCertDB();
    cert = xcert->getNssCert() ;
    if( cert != nullptr )
    {

        //prepare the intermediate certificates
        for (const auto& rIntermediateCert : intermediateCerts)
        {
            Sequence<sal_Int8> der = rIntermediateCert->getEncoded();
            SECItem item;
            item.type = siBuffer;
            item.data = reinterpret_cast<unsigned char*>(der.getArray());
            item.len = der.getLength();

            CERTCertificate* certTmp = CERT_NewTempCertificate(certDb, &item,
                                           nullptr     /* nickname */,
                                           PR_FALSE /* isPerm */,
                                           PR_TRUE  /* copyDER */);
            if (!certTmp)
            {
                 SAL_INFO("xmlsecurity.xmlsec", "Failed to add a temporary certificate: " << rIntermediateCert->getIssuerName());

            }
            else
            {
                 SAL_INFO("xmlsecurity.xmlsec", "Added temporary certificate: " <<
                          (certTmp->subjectName ? certTmp->subjectName : ""));
                 vecTmpNSSCertificates.push_back(certTmp);
            }
        }


        SECStatus status ;

        CERTVerifyLog log;
        log.arena = PORT_NewArena(512);
        log.head = log.tail = nullptr;
        log.count = 0;

        CERT_EnableOCSPChecking(certDb);
        CERT_DisableOCSPDefaultResponder(certDb);
        CERTValOutParam cvout[5];
        CERTValInParam cvin[3];
        int ncvinCount=0;

#if ( NSS_VMAJOR > 3 ) || ( NSS_VMAJOR == 3 && NSS_VMINOR > 12 ) || ( NSS_VMAJOR == 3 && NSS_VMINOR == 12 && NSS_VPATCH > 0 )
        cvin[ncvinCount].type = cert_pi_useAIACertFetch;
        cvin[ncvinCount].value.scalar.b = PR_TRUE;
        ncvinCount++;
#endif

        PRUint64 revFlagsLeaf[2];
        PRUint64 revFlagsChain[2];
        CERTRevocationFlags rev;
        rev.leafTests.number_of_defined_methods = 2;
        rev.leafTests.cert_rev_flags_per_method = revFlagsLeaf;
        //the flags are defined in cert.h
        //We check both leaf and chain.
        //It is enough if one revocation method has fresh info,
        //but at least one must have some. Otherwise validation fails.
        //!!! using leaf test and CERT_REV_MI_REQUIRE_SOME_FRESH_INFO_AVAILABLE
        // when validating a root certificate will result in "revoked". Usually
        //there is no revocation information available for the root cert because
        //it must be trusted anyway and it does itself issue revocation information.
        //When we use the flag here and OOo shows the certification path then the root
        //cert is invalid while all other can be valid. It would probably best if
        //this interface method returned the whole chain.
        //Otherwise we need to check if the certificate is self-signed and if it is
        //then not use the flag when doing the leaf-test.
        rev.leafTests.cert_rev_flags_per_method[cert_revocation_method_crl] =
            CERT_REV_M_TEST_USING_THIS_METHOD
            | CERT_REV_M_IGNORE_IMPLICIT_DEFAULT_SOURCE;
        rev.leafTests.cert_rev_flags_per_method[cert_revocation_method_ocsp] =
            CERT_REV_M_TEST_USING_THIS_METHOD
            | CERT_REV_M_IGNORE_IMPLICIT_DEFAULT_SOURCE;
        rev.leafTests.number_of_preferred_methods = 0;
        rev.leafTests.preferred_methods = nullptr;
        rev.leafTests.cert_rev_method_independent_flags =
            CERT_REV_MI_TEST_ALL_LOCAL_INFORMATION_FIRST;

        rev.chainTests.number_of_defined_methods = 2;
        rev.chainTests.cert_rev_flags_per_method = revFlagsChain;
        rev.chainTests.cert_rev_flags_per_method[cert_revocation_method_crl] =
            CERT_REV_M_TEST_USING_THIS_METHOD
            | CERT_REV_M_IGNORE_IMPLICIT_DEFAULT_SOURCE;
        rev.chainTests.cert_rev_flags_per_method[cert_revocation_method_ocsp] =
            CERT_REV_M_TEST_USING_THIS_METHOD
            | CERT_REV_M_IGNORE_IMPLICIT_DEFAULT_SOURCE;
        rev.chainTests.number_of_preferred_methods = 0;
        rev.chainTests.preferred_methods = nullptr;
        rev.chainTests.cert_rev_method_independent_flags =
            CERT_REV_MI_TEST_ALL_LOCAL_INFORMATION_FIRST;


        cvin[ncvinCount].type = cert_pi_revocationFlags;
        cvin[ncvinCount].value.pointer.revocation = &rev;
        ncvinCount++;
        // does not work, not implemented yet in 3.12.4
//         cvin[ncvinCount].type = cert_pi_keyusage;
//         cvin[ncvinCount].value.scalar.ui = KU_DIGITAL_SIGNATURE;
//         ncvinCount++;
        cvin[ncvinCount].type = cert_pi_end;

        cvout[0].type = cert_po_trustAnchor;
        cvout[0].value.pointer.cert = nullptr;
        cvout[1].type = cert_po_errorLog;
        cvout[1].value.pointer.log = &log;
        cvout[2].type = cert_po_end;

        // We check SSL server certificates, CA certificates and signing certificates.
        //
        // ToDo check keyusage, looking at CERT_KeyUsageAndTypeForCertUsage (
        // mozilla/security/nss/lib/certdb/certdb.c indicates that
        // certificateUsageSSLClient, certificateUsageSSLServer and certificateUsageSSLCA
        // are sufficient. They cover the key usages for digital signature, key agreement
        // and encipherment and certificate signature

        //never use the following usages because they are not checked properly
        // certificateUsageUserCertImport
        // certificateUsageVerifyCA
        // certificateUsageAnyCA
        // certificateUsageProtectedObjectSigner

        UsageDescription arUsages[5];
        arUsages[0] = UsageDescription( certificateUsageSSLClient, "certificateUsageSSLClient"  );
        arUsages[1] = UsageDescription( certificateUsageSSLServer, "certificateUsageSSLServer"  );
        arUsages[2] = UsageDescription( certificateUsageSSLCA, "certificateUsageSSLCA"  );
        arUsages[3] = UsageDescription( certificateUsageEmailSigner, "certificateUsageEmailSigner" );
        arUsages[4] = UsageDescription( certificateUsageEmailRecipient, "certificateUsageEmailRecipient" );

        int numUsages = SAL_N_ELEMENTS(arUsages);
        for (int i = 0; i < numUsages; i++)
        {
            SAL_INFO("xmlsecurity.xmlsec", "Testing usage " << i+1 <<
                     " of " << numUsages << ": " <<
                     arUsages[i].description <<
                     " (0x" << std::hex << static_cast<int>(arUsages[i].usage) << ")" << std::dec);

            status = CERT_PKIXVerifyCert(const_cast<CERTCertificate *>(cert), arUsages[i].usage,
                                         cvin, cvout, nullptr);
            if( status == SECSuccess )
            {
                SAL_INFO("xmlsecurity.xmlsec", "CERT_PKIXVerifyCert returned SECSuccess.");
                //When an intermediate or root certificate is checked then we expect the usage
                //certificateUsageSSLCA. This, however, will be only set when in the trust settings dialog
                //the button "This certificate can identify websites" is checked. If for example only
                //"This certificate can identify mail users" is set then the end certificate can
                //be validated and the returned usage will contain certificateUsageEmailRecipient.
                //But checking directly the root or intermediate certificate will fail. In the
                //certificate path view the end certificate will be shown as valid but the others
                //will be displayed as invalid.

                validity = csss::CertificateValidity::VALID;
                SAL_INFO("xmlsecurity.xmlsec", "Certificate is valid.");
                CERTCertificate * issuerCert = cvout[0].value.pointer.cert;
                if (issuerCert)
                {
                    SAL_INFO("xmlsecurity.xmlsec", "Root certificate: " << issuerCert->subjectName);
                    CERT_DestroyCertificate(issuerCert);
                };

                break;
            }
            else
            {
                PRIntn err = PR_GetError();
                SAL_INFO("xmlsecurity.xmlsec", "Error: " <<  err << ": " << getCertError(err));

                /* Display validation results */
                if ( log.count > 0)
                {
                    CERTVerifyLogNode *node = nullptr;
                    printChainFailure(&log);

                    for (node = log.head; node; node = node->next) {
                        if (node->cert)
                            CERT_DestroyCertificate(node->cert);
                    }
                    log.head = log.tail = nullptr;
                    log.count = 0;
                }
                SAL_INFO("xmlsecurity.xmlsec", "Certificate is invalid.");
            }
        }

    }
    else
    {
        validity = css::security::CertificateValidity::INVALID ;
    }

    //Destroying the temporary certificates
    for (auto& tmpCert : vecTmpNSSCertificates)
    {
        SAL_INFO("xmlsecurity.xmlsec", "Destroying temporary certificate");
        CERT_DestroyCertificate(tmpCert);
    }
    return validity ;
}

sal_Int32 SecurityEnvironment_NssImpl::getCertificateCharacters(
    const css::uno::Reference< css::security::XCertificate >& aCert ) {
    sal_Int32 characters ;
    const X509Certificate_NssImpl* xcert ;
    const CERTCertificate* cert ;

    Reference< XUnoTunnel > xCertTunnel( aCert, UNO_QUERY_THROW ) ;
    xcert = reinterpret_cast<X509Certificate_NssImpl*>(
        sal::static_int_cast<sal_uIntPtr>(xCertTunnel->getSomething( X509Certificate_NssImpl::getUnoTunnelId() ))) ;
    if( xcert == nullptr ) {
        throw RuntimeException() ;
    }

    cert = xcert->getNssCert() ;

    characters = 0x00000000 ;

    //Firstly, find out whether or not the cert is self-signed.
    if( SECITEM_CompareItem( &(cert->derIssuer), &(cert->derSubject) ) == SECEqual ) {
        characters |= css::security::CertificateCharacters::SELF_SIGNED ;
    } else {
        characters &= ~ css::security::CertificateCharacters::SELF_SIGNED ;
    }

    //Secondly, find out whether or not the cert has a private key.

    /*
     * i40394
     *
     * mmi : need to check whether the cert's slot is valid first
     */
    SECKEYPrivateKey* priKey = nullptr;

    if (cert->slot != nullptr)
    {
        priKey = PK11_FindPrivateKeyFromCert( cert->slot, const_cast<CERTCertificate*>(cert), nullptr ) ;
    }
    if(priKey == nullptr)
    {
        for (auto& slot : m_Slots)
        {
            priKey = PK11_FindPrivateKeyFromCert(slot, const_cast<CERTCertificate*>(cert), nullptr);
            if (priKey)
                break;
        }
    }
    if( priKey != nullptr ) {
        characters |=  css::security::CertificateCharacters::HAS_PRIVATE_KEY ;

        SECKEY_DestroyPrivateKey( priKey ) ;
    } else {
        characters &= ~ css::security::CertificateCharacters::HAS_PRIVATE_KEY ;
    }

    return characters ;
}

X509Certificate_NssImpl* NssCertToXCert( CERTCertificate* cert )
{
    X509Certificate_NssImpl* xcert ;

    if( cert != nullptr ) {
        xcert = new X509Certificate_NssImpl() ;
        xcert->setCert( cert ) ;
    } else {
        xcert = nullptr ;
    }

    return xcert ;
}

X509Certificate_NssImpl* NssPrivKeyToXCert( SECKEYPrivateKey* priKey )
{
    X509Certificate_NssImpl* xcert ;

    if( priKey != nullptr ) {
        CERTCertificate* cert = PK11_GetCertFromPrivateKey( priKey ) ;

        if( cert != nullptr ) {
            xcert = NssCertToXCert( cert ) ;
        } else {
            xcert = nullptr ;
        }

        CERT_DestroyCertificate( cert ) ;
    } else {
        xcert = nullptr ;
    }

    return xcert ;
}

xmlSecKeysMngrPtr SecurityEnvironment_NssImpl::createKeysManager() {

    /*-
     * The following lines is based on the private version of xmlSec-NSS
     * crypto engine
     */
    int cSlots = m_Slots.size();
    std::unique_ptr<PK11SlotInfo*[]> sarSlots(new PK11SlotInfo*[cSlots]);
    PK11SlotInfo**  slots = sarSlots.get();
    int count = 0;
    for (const auto& slot : m_Slots)
    {
        slots[count] = slot;
        ++count;
    }

    xmlSecKeysMngrPtr pKeysMngr = xmlSecKeysMngrCreate();
    if (!pKeysMngr)
        throw RuntimeException();

    if (xmlSecNssAppDefaultKeysMngrInit(pKeysMngr) < 0)
        throw RuntimeException();

    // Adopt the private key of the signing certificate, if it has any.
    if (auto pCertificate = dynamic_cast<X509Certificate_NssImpl*>(m_xSigningCertificate.get()))
    {
        SECKEYPrivateKey* pPrivateKey = SECKEY_CopyPrivateKey(pCertificate->getPrivateKey());
        if (pPrivateKey)
        {
            xmlSecKeyDataPtr pKeyData = xmlSecNssPKIAdoptKey(pPrivateKey, nullptr);
            xmlSecKeyPtr pKey = xmlSecKeyCreate();
            xmlSecKeySetValue(pKey, pKeyData);
            xmlSecNssAppDefaultKeysMngrAdoptKey(pKeysMngr, pKey);
        }
        else
        {
            SAL_WARN("xmlsecurity.xmlsec", "Can't get the private key from the certificate.");
        }
    }

    return pKeysMngr;
}

void SecurityEnvironment_NssImpl::destroyKeysManager(xmlSecKeysMngrPtr pKeysMngr) {
    if( pKeysMngr != nullptr ) {
        xmlSecKeysMngrDestroy( pKeysMngr ) ;
    }
}

SECKEYPrivateKey* SecurityEnvironment_NssImpl::insertPrivateKey(css::uno::Sequence<sal_Int8> const & raPrivateKey)
{
    PK11SlotInfo* pSlot = PK11_GetInternalKeySlot();

    if (!pSlot)
        return nullptr;

    SECItem aDerPrivateKeyInfo;
    aDerPrivateKeyInfo.data = reinterpret_cast<unsigned char *>(const_cast<sal_Int8 *>(raPrivateKey.getConstArray()));
    aDerPrivateKeyInfo.len = raPrivateKey.getLength();

    const unsigned int aKeyUsage = KU_ALL;
    SECKEYPrivateKey* pPrivateKey = nullptr;

    bool bPermanent = PR_FALSE;
    bool bPrivate = PR_TRUE;

    SECStatus nStatus = PK11_ImportDERPrivateKeyInfoAndReturnKey(
          pSlot, &aDerPrivateKeyInfo, nullptr, nullptr, bPermanent, bPrivate,
          aKeyUsage, &pPrivateKey, nullptr);

    if (nStatus != SECSuccess)
        return nullptr;

    PK11_FreeSlot(pSlot);

    return pPrivateKey;
}

uno::Reference<security::XCertificate> SecurityEnvironment_NssImpl::createDERCertificateWithPrivateKey(
        Sequence<sal_Int8> const & raDERCertificate, Sequence<sal_Int8> const & raPrivateKey)
{
    SECKEYPrivateKey* pPrivateKey = insertPrivateKey(raPrivateKey);

    if (!pPrivateKey)
        return uno::Reference<security::XCertificate>();

    X509Certificate_NssImpl* pX509Certificate = createAndAddCertificateFromPackage(raDERCertificate, "TCu,TCu,TCu");
    if (!pX509Certificate)
        return uno::Reference<security::XCertificate>();

    return pX509Certificate;
}

uno::Reference<security::XCertificate> SecurityEnvironment_NssImpl::addDERCertificateToTheDatabase(
        uno::Sequence<sal_Int8> const & raDERCertificate, OUString const & raTrustString)
{
    X509Certificate_NssImpl* pX509Certificate = createAndAddCertificateFromPackage(raDERCertificate, raTrustString);
    return pX509Certificate;
}

extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
com_sun_star_xml_crypto_SecurityEnvironment_get_implementation(<--- The function 'com_sun_star_xml_crypto_SecurityEnvironment_get_implementation' is never used.
    uno::XComponentContext* /*pCtx*/, uno::Sequence<uno::Any> const& /*rSeq*/)
{
    return cppu::acquire(new SecurityEnvironment_NssImpl);
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */