C++ Extensions类代码示例

/*
* Handle attributes in a PKCS #10 request
*/
void PKCS10_Request::handle_attribute(const Attribute& attr)
   {
   BER_Decoder value(attr.parameters);

   if(attr.oid == OIDS::lookup("PKCS9.EmailAddress"))
      {
      ASN1_String email;
      value.decode(email);
      m_info.add("RFC822", email.value());
      }
   else if(attr.oid == OIDS::lookup("PKCS9.ChallengePassword"))
      {
      ASN1_String challenge_password;
      value.decode(challenge_password);
      m_info.add("PKCS9.ChallengePassword", challenge_password.value());
      }
   else if(attr.oid == OIDS::lookup("PKCS9.ExtensionRequest"))
      {
      Extensions extensions;
      value.decode(extensions).verify_end();

      Data_Store issuer_info;
      extensions.contents_to(m_info, issuer_info);
      }
   }

 void registerExtensions (Extensions& extensions)
 {
     extensions.registerInstruction ("user1", "", opcodeUser1);
     extensions.registerInstruction ("user2", "", opcodeUser2);
     extensions.registerInstruction ("user3", "", opcodeUser3, opcodeUser3);
     extensions.registerInstruction ("user4", "", opcodeUser4, opcodeUser4);
 }

PrefAssociations::PrefAssociations(QWidget * parent, Qt::WindowFlags f)
: PrefWidget(parent, f )
{
	setupUi(this);

	connect(selectAll, SIGNAL(clicked(bool)), this, SLOT(selectAllClicked(bool)));
	connect(selectNone, SIGNAL(clicked(bool)), this, SLOT(selectNoneClicked(bool)));
	connect(listWidget, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(listItemClicked(QListWidgetItem*))); 
	connect(listWidget, SIGNAL(itemPressed(QListWidgetItem*)), this, SLOT(listItemPressed(QListWidgetItem*))); 

	if (QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA)
	{
		//Hide Select None - One cannot restore an association in Vista. Go figure.
		selectNone->hide(); 
		//QPushButton* lpbButton = new QPushButton("Launch Program Defaults", this); 
		//hboxLayout->addWidget(lpbButton); 
		//connect(lpbButton, SIGNAL(clicked(bool)), this, SLOT(launchAppDefaults()));
	}

	Extensions e;
	for (int n=0; n < e.multimedia().count(); n++) {
		addItem( e.multimedia()[n] );
	}
	// Add the playlist extensions
	for (int n=0; n < e.playlist().count(); n++) {
		addItem( e.playlist()[n] );
	}
	retranslateStrings();

	something_changed = false;
}

 const Codec::Extensions* OggCodec::getExtensions() const throw()
 {
     static Extensions ext;
     if (ext.empty() == 0) {
         ext.push_back(".ogg");
     }
     return &ext;
 }

/*
* DER encode a CRL_Entry
*/
void CRL_Entry::encode_into(DER_Encoder& der) const
   {
   Extensions extensions;

   extensions.add(new Cert_Extension::CRL_ReasonCode(reason));

   der.start_cons(SEQUENCE)
         .encode(BigInt::decode(serial, serial.size()))
         .encode(time)
         .encode(extensions)
      .end_cons();
   }

void PixelBufferObject::compileBuffer(State& state) const
{
    unsigned int contextID = state.getContextID();

    _compiledList[contextID] = 1;

    osg::Image* image = _bufferEntryImagePair.second;

    _bufferEntryImagePair.first.modifiedCount[contextID] = image->getModifiedCount();
    if (!image->valid()) return;

    Extensions* extensions = getExtensions(contextID,true);

    GLuint& pbo = buffer(contextID);
    if (pbo==0)
    {
        // building for the first time.

        _totalSize = image->getTotalSizeInBytes();

        // don't generate buffer if size is zero.
        if (_totalSize==0) return;

        extensions->glGenBuffers(1, &pbo);
        extensions->glBindBuffer(_target, pbo);
        extensions->glBufferData(_target, _totalSize, NULL, _usage);

    }
    else
    {
        extensions->glBindBuffer(_target, pbo);

        if (_totalSize != image->getTotalSizeInBytes())
        {
            // resize PBO.
            _totalSize = image->getTotalSizeInBytes();
            extensions->glBufferData(_target, _totalSize, NULL, _usage);
        }
    }

//    osg::Timer_t start_tick = osg::Timer::instance()->tick();

    void* pboMemory = extensions->glMapBuffer(_target,
                 GL_WRITE_ONLY_ARB);

    // copy data across
    memcpy(pboMemory, image->data(), _totalSize);

    // Unmap the texture image buffer
    extensions->glUnmapBuffer(_target);

    _bufferEntryImagePair.first.modifiedCount[contextID] = image->getModifiedCount();

//    osg::notify(osg::NOTICE)<<"pbo _totalSize="<<_totalSize<<std::endl;
//    osg::notify(osg::NOTICE)<<"pbo "<<osg::Timer::instance()->delta_m(start_tick,osg::Timer::instance()->tick())<<"ms"<<std::endl;
}

/*
* Create a CRL
*/
X509_CRL X509_CA::make_crl(const std::vector<CRL_Entry>& revoked,
                           u32bit crl_number, u32bit next_update,
                           RandomNumberGenerator& rng) const
   {
   const size_t X509_CRL_VERSION = 2;

   if(next_update == 0)
      next_update = timespec_to_u32bit("7d");

   // Totally stupid: ties encoding logic to the return of std::time!!
   auto current_time = std::chrono::system_clock::now();
   auto expire_time = current_time + std::chrono::seconds(next_update);

   Extensions extensions;
   extensions.add(
      new Cert_Extension::Authority_Key_ID(m_cert.subject_key_id()));
   extensions.add(new Cert_Extension::CRL_Number(crl_number));

   // clang-format off
   const std::vector<byte> crl = X509_Object::make_signed(
      m_signer, rng, m_ca_sig_algo,
      DER_Encoder().start_cons(SEQUENCE)
         .encode(X509_CRL_VERSION-1)
         .encode(m_ca_sig_algo)
         .encode(m_cert.issuer_dn())
         .encode(X509_Time(current_time))
         .encode(X509_Time(expire_time))
         .encode_if(revoked.size() > 0,
              DER_Encoder()
                 .start_cons(SEQUENCE)
                    .encode_list(revoked)
                 .end_cons()
            )
         .start_explicit(0)
            .start_cons(SEQUENCE)
               .encode(extensions)
            .end_cons()
         .end_explicit()
      .end_cons()
      .get_contents());
   // clang-format on

   return X509_CRL(crl);
   }

/*
* Create a PKCS #10 certificate request
*/
PKCS10_Request create_cert_req(const X509_Cert_Options& opts,
                               const Private_Key& key,
                               const std::string& hash_fn,
                               RandomNumberGenerator& rng)
   {
   X509_DN subject_dn;
   AlternativeName subject_alt;
   load_info(opts, subject_dn, subject_alt);

   Key_Constraints constraints;
   if(opts.is_CA)
      {
      constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
      }
   else
      {
      verify_cert_constraints_valid_for_key_type(key, opts.constraints);
      constraints = opts.constraints;
      }

   Extensions extensions = opts.extensions;

   extensions.add_new(new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit));

   if(constraints != NO_CONSTRAINTS)
      {
      extensions.add_new(new Cert_Extension::Key_Usage(constraints));
      }
   extensions.add_new(new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));
   extensions.add_new(new Cert_Extension::Subject_Alternative_Name(subject_alt));

   return PKCS10_Request::create(key,
                                 subject_dn,
                                 extensions,
                                 hash_fn,
                                 rng,
                                 opts.padding_scheme,
                                 opts.challenge);
   }

/*
* Create a new self-signed X.509 certificate
*/
X509_Certificate create_self_signed_cert(const X509_Cert_Options& opts,
                                         const Private_Key& key,
                                         const std::string& hash_fn,
                                         RandomNumberGenerator& rng)
   {
   AlgorithmIdentifier sig_algo;
   X509_DN subject_dn;
   AlternativeName subject_alt;

   // for now, only the padding option is used
   std::map<std::string,std::string> sig_opts = { {"padding",opts.padding_scheme} };

   const std::vector<uint8_t> pub_key = X509::BER_encode(key);
   std::unique_ptr<PK_Signer> signer(choose_sig_format(key, sig_opts, rng, hash_fn, sig_algo));
   load_info(opts, subject_dn, subject_alt);

   Extensions extensions = opts.extensions;

   Key_Constraints constraints;
   if(opts.is_CA)
      {
      constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
      }
   else
      {
      verify_cert_constraints_valid_for_key_type(key, opts.constraints);
      constraints = opts.constraints;
      }

   extensions.add_new(
      new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit),
      true);

   if(constraints != NO_CONSTRAINTS)
      {
      extensions.add_new(new Cert_Extension::Key_Usage(constraints), true);
      }

   std::unique_ptr<Cert_Extension::Subject_Key_ID> skid(new Cert_Extension::Subject_Key_ID(pub_key, hash_fn));

   extensions.add_new(new Cert_Extension::Authority_Key_ID(skid->get_key_id()));
   extensions.add_new(skid.release());

   extensions.add_new(
      new Cert_Extension::Subject_Alternative_Name(subject_alt));

   extensions.add_new(
      new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));

   return X509_CA::make_cert(signer.get(), rng, sig_algo, pub_key,
                             opts.start, opts.end,
                             subject_dn, subject_dn,
                             extensions);
   }

/*
* Create a new self-signed X.509 certificate
*/
X509_Certificate create_self_signed_cert(const X509_Cert_Options& opts,
                                         const Private_Key& key,
                                         const std::string& hash_fn,
                                         RandomNumberGenerator& rng)
   {
   AlgorithmIdentifier sig_algo;
   X509_DN subject_dn;
   AlternativeName subject_alt;

   std::vector<byte> pub_key = X509::BER_encode(key);
   std::unique_ptr<PK_Signer> signer(choose_sig_format(key, hash_fn, sig_algo));
   load_info(opts, subject_dn, subject_alt);

   Key_Constraints constraints;
   if(opts.is_CA)
      {
      constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
      }
   else
      {
      verify_cert_constraints_valid_for_key_type(key, opts.constraints);
      constraints = opts.constraints;
      }

   Extensions extensions;

   extensions.add(
      new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit),
      true);

   if(constraints != NO_CONSTRAINTS)
      {
      extensions.add(new Cert_Extension::Key_Usage(constraints), true);
      }

   extensions.add(new Cert_Extension::Subject_Key_ID(pub_key));

   extensions.add(
      new Cert_Extension::Subject_Alternative_Name(subject_alt));

   extensions.add(
      new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));

   return X509_CA::make_cert(signer.get(), rng, sig_algo, pub_key,
                             opts.start, opts.end,
                             subject_dn, subject_dn,
                             extensions);
   }

/*
* Sign a PKCS #10 certificate request
*/
X509_Certificate X509_CA::sign_request(const PKCS10_Request& req,
                                       RandomNumberGenerator& rng,
                                       const X509_Time& not_before,
                                       const X509_Time& not_after)
   {
   Key_Constraints constraints;
   if(req.is_CA())
      {
      constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
      }
   else
      {
      std::unique_ptr<Public_Key> key(req.subject_public_key());
      verify_cert_constraints_valid_for_key_type(*key, req.constraints());
      constraints = req.constraints();
      }

   Extensions extensions = req.extensions();

   extensions.replace(
      new Cert_Extension::Basic_Constraints(req.is_CA(), req.path_limit()),
      true);

   if(constraints != NO_CONSTRAINTS)
      {
      extensions.replace(new Cert_Extension::Key_Usage(constraints), true);
      }

   extensions.replace(new Cert_Extension::Authority_Key_ID(m_cert.subject_key_id()));
   extensions.replace(new Cert_Extension::Subject_Key_ID(req.raw_public_key()));

   extensions.replace(
      new Cert_Extension::Subject_Alternative_Name(req.subject_alt_name()));

   extensions.replace(
      new Cert_Extension::Extended_Key_Usage(req.ex_constraints()));

   return make_cert(m_signer, rng, m_ca_sig_algo,
                    req.raw_public_key(),
                    not_before, not_after,
                    m_cert.subject_dn(), req.subject_dn(),
                    extensions);
   }

int main()
{
	Extensions<int> myExtensions;

	for (int i = 0;i < myExtensions.getSize(); i++) {
		myExtensions.setValue(i, rand() % 100);
	}

	cout << "Unsorted: " << endl;
	myExtensions.print();
	cout << "Sorted: " << endl;
	myExtensions.sort();
	myExtensions.print();

	return 0;
}

void SkiaBitmapShader::describe(ProgramDescription& description, const Extensions& extensions) {
    Texture* texture = mCaches->textureCache.get(mBitmap);
    if (!texture) return;
    mTexture = texture;

    const float width = texture->width;
    const float height = texture->height;

    description.hasBitmap = true;
    // The driver does not support non-power of two mirrored/repeated
    // textures, so do it ourselves
    if (!extensions.hasNPot() && (!isPowerOfTwo(width) || !isPowerOfTwo(height)) &&
            (mTileX != SkShader::kClamp_TileMode || mTileY != SkShader::kClamp_TileMode)) {
        description.isBitmapNpot = true;
        description.bitmapWrapS = gTileModes[mTileX];
        description.bitmapWrapT = gTileModes[mTileY];
        mWrapS = GL_CLAMP_TO_EDGE;
        mWrapT = GL_CLAMP_TO_EDGE;
    } else {
        mWrapS = gTileModes[mTileX];
        mWrapT = gTileModes[mTileY];
    }
}

/*
* Sign a PKCS #10 certificate request
*/
X509_Certificate X509_CA::sign_request(const PKCS10_Request& req,
                                       RandomNumberGenerator& rng,
                                       const X509_Time& not_before,
                                       const X509_Time& not_after)
   {
   Key_Constraints constraints;
   if(req.is_CA())
      constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
   else
      {
      std::unique_ptr<Public_Key> key(req.subject_public_key());
      constraints = find_constraints(*key, req.constraints());
      }

   Extensions extensions;

   extensions.add(
      new Cert_Extension::Basic_Constraints(req.is_CA(), req.path_limit()),
      true);

   extensions.add(new Cert_Extension::Key_Usage(constraints), true);

   extensions.add(new Cert_Extension::Authority_Key_ID(cert.subject_key_id()));
   extensions.add(new Cert_Extension::Subject_Key_ID(req.raw_public_key()));

   extensions.add(
      new Cert_Extension::Subject_Alternative_Name(req.subject_alt_name()));

   extensions.add(
      new Cert_Extension::Extended_Key_Usage(req.ex_constraints()));

   return make_cert(signer, rng, ca_sig_algo,
                    req.raw_public_key(),
                    not_before, not_after,
                    cert.subject_dn(), req.subject_dn(),
                    extensions);
   }

/*
* Create a PKCS #10 certificate request
*/
PKCS10_Request create_cert_req(const X509_Cert_Options& opts,
                               const Private_Key& key,
                               const std::string& hash_fn,
                               RandomNumberGenerator& rng)
   {
   AlgorithmIdentifier sig_algo;
   X509_DN subject_dn;
   AlternativeName subject_alt;

   opts.sanity_check();

   std::vector<byte> pub_key = X509::BER_encode(key);
   std::unique_ptr<PK_Signer> signer(choose_sig_format(key, hash_fn, sig_algo));
   load_info(opts, subject_dn, subject_alt);

   const size_t PKCS10_VERSION = 0;

   Extensions extensions;

   extensions.add(
      new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit));
   extensions.add(
      new Cert_Extension::Key_Usage(
         opts.is_CA ? Key_Constraints(KEY_CERT_SIGN | CRL_SIGN) :
                      find_constraints(key, opts.constraints)
         )
      );
   extensions.add(
      new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));
   extensions.add(
      new Cert_Extension::Subject_Alternative_Name(subject_alt));

   DER_Encoder tbs_req;

   tbs_req.start_cons(SEQUENCE)
      .encode(PKCS10_VERSION)
      .encode(subject_dn)
      .raw_bytes(pub_key)
      .start_explicit(0);

   if(opts.challenge != "")
      {
      ASN1_String challenge(opts.challenge, DIRECTORY_STRING);

      tbs_req.encode(
         Attribute("PKCS9.ChallengePassword",
                   DER_Encoder().encode(challenge).get_contents_unlocked()
            )
         );
      }

   tbs_req.encode(
      Attribute("PKCS9.ExtensionRequest",
                DER_Encoder()
                   .start_cons(SEQUENCE)
                      .encode(extensions)
                   .end_cons()
               .get_contents_unlocked()
         )
      )
      .end_explicit()
      .end_cons();

   const std::vector<byte> req =
      X509_Object::make_signed(signer.get(), rng, sig_algo,
                               tbs_req.get_contents());

   return PKCS10_Request(req);
   }