ESYAE-imza Kütüphaneleri

İmzalama işlemi genel olarak iki aşamada gerçekleşmektedir. Öncelikle imzacının sertifikasının doğrulanması yapılmaktadır, sonra imza atma işlemi gerçekleşmektedir.

Veriyi imzalama işleminden BaseSignedData sınıfı sorumludur. Bu sınıfa öncelikle addContent(…) fonksiyonu ile imzalanacak veri eklenmelidir. addContent(…) fonksiyonu yalnızca bir kere çağrılmalıdır. İmzalanacak veri addContent(…) ile eklendikten sonra değiştirilemez. addSigner(…) fonksiyonu ile veriye imza bilgileri eklenir.

İmza eklenirken imzanın türü, imzacının sertifikası, imza işlemini gerçekleştirecek kripto nesnesi, varsa ekstra imza özellikleri ve imza üretiminde kullanılması gereken parametreler addSigner(…) fonksiyonuna parametre olarak geçilmelidir. İmza atan örnek kod bloğu:

BaseSignedData bs = new BaseSignedData();
ISignable content = new SignableByteArray("test".getBytes());
bs.addContent(content);
				
HashMap<String, Object> params = new HashMap<String, Object>();
		
//if the user does not want certificate validation at generating signature,he can add 
//P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false
//params.put(EParameters.P_VALIDATE_CERTIFICATE_BEFORE_SIGNING, false);

//necessary for certificate validation.By default,certificate validation is done 
params.put(EParameters.P_CERT_VALIDATION_POLICY, TestConstants.getPolicy());
				
//By default, QC statement is checked,and signature wont be created if it is not a 
//qualified certificate. 
boolean checkQCStatement = TestConstants.getCheckQCStatement();
				
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);
		
//add signer
//Since the specified attributes are mandatory for bes,null is given as parameter 
//for optional attributes
bs.addSigner(ESignatureType.TYPE_BES, cert , signer, null, params);
		
SmartCardManager.getInstance().logout();
		
byte [] signedDocument = bs.getEncoded();
		
//write the contentinfo to file
AsnIO.dosyayaz(signedDocument,TestConstants.getDirectory() + "testdata/BES-1.p7s");

BaseSignedData bs = new BaseSignedData();
ISignable content = new SignableByteArray(ASCIIEncoding.ASCII.GetBytes("test"));
bs.addContent(content);

Dictionary<String, Object> params_ = new Dictionary<String, Object>();
//if the user does not want certificate validation at generating signature,he can add 
//P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false
params_[EParameters.P_VALIDATE_CERTIFICATE_BEFORE_SIGNING] = false;

//necessary for certificate validation.By default,certificate validation is done 
params_[EParameters.P_CERT_VALIDATION_POLICY] = TestConstants.getPolicy();

//By default, QC statement is checked,and signature wont be created if it is not a 
//qualified certificate. 

bool checkQCStatement = TestConstants.getCheckQCStatement();
            
//Get qualified or non-qualified certificate.
  ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);

//add signer
 //Since the specified attributes are mandatory for bes,null is given as parameter 
//for optional attributes
try
{
bs.addSigner(ESignatureType.TYPE_BES, cert, signer, null, params_);
}
catch (CertificateValidationException cve)
{              Console.WriteLine(cve.getCertStatusInfo().getDetailedMessage());
   }
            

SmartCardManager.getInstance().logout();

byte[] signedDocument = bs.getEncoded();

//write the contentinfo to file
DirectoryInfo di = Directory.CreateDirectory(TestConstants.getDirectory()+@"\testVerileri");
            AsnIO.dosyayaz(signedDocument, di.FullName + @"\BES-1.p7s");

Bir veri birkaç kişi tarafından imzalanabilir. İmzalar iki şekilde atılabilir.

1. Paralel İmza Ekleme
2. Seri İmza Ekleme

Bu tür imzalarda bütün imzacıların imzaladıkları veri aynıdır. Bütün imzalar aynı seviyededir. Bir imzacının imzası dokümandan çıkartılırsa fark edilemez.

byte [] signature = AsnIO.dosyadanOKU(SIGNATURE_FILE);
BaseSignedData bs = new BaseSignedData(signature); 
				
//create parameters necessary for signature creation 
HashMap<String, Object> params = new HashMap<String, Object>(); 
ValidationPolicy policy =  PolicyReader.readValidationPolicy(new FileInputStream(POLICY_FILE)); 
params.put(EParameters.P_CERT_VALIDATION_POLICY, policy);
/*necessary for certificate validation.By default,certificate validation is done.But if the user does not want certificate validation,he can add P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false*/		
		
//By default, QC statement is checked,and signature wont be created if it is not a 
//qualified certificate. 
boolean checkQCStatement = TestConstants.getCheckQCStatement();
				
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);
		
//add signer. Since the specified attributes are mandatory for bes,null is given as parameter for 
//optional attributes 
bs.addSigner(ESignatureType.TYPE_BES, cert , signer, null, params); 
				
//write the contentinfo to file 
AsnIO.dosyayaz(bs.getEncoded(),NEW_SIGNATURE_ADDED_FILE);	
sc.logout(session); 

SmartCardManager.getInstance().logout();

byte[] signature = AsnIO.dosyadanOKU(SIGNATURE_FILE);
BaseSignedData bs = new BaseSignedData(signature);

//create parameters necessary for signature creation 
Dictionary<String, Object> params_ = new Dictionary<String, Object>();
ValidationPolicy policy = PolicyReader.readValidationPolicy(new FileStream(POLICY_FILE,  
FileMode.Open, FileAccess.Read));
params_[EParameters.P_CERT_VALIDATION_POLICY] = policy;

/*necessary for certificate validation.By default,certificate validation is done.But if the user does not want certificate validation,he can add P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false*/

bool checkQCStatement = TestConstants.getCheckQCStatement();
            
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);

//add signer. Since the specified attributes are mandatory for bes,null is given as parameter for 
//optional attributes 
bs.addSigner(ESignatureType.TYPE_BES, cert, signer, null, params_);

//write the contentinfo to file 
AsnIO.dosyayaz(bs.getEncoded(), NEW_SIGNATURE_ADDED_FILE);

SmartCardManager.getInstance().logout();

Veriyi imzalayan imzanın imzalanmasıdır. Dolayısıyla bir imzacının imzası çıkartılırsa o imzacıdan sonra imza atan imzacıların da imzalarının çıkartılması gerekmektedir. Aşağıdaki kod örneğinde ilk imzacıya seri imza ekleniyor.

byte [] signature = AsnIO.dosyadanOKU(SIGNATURE_FILE);
BaseSignedData bs = new BaseSignedData(signature);
				
//create parameters necessary for signature creation 
HashMap<String, Object> params = new HashMap<String, Object>(); 
ValidationPolicy policy =  PolicyReader.readValidationPolicy(new FileInputStream(POLICY_FILE));
params.put(EParameters.P_CERT_VALIDATION_POLICY, policy); 
/*necessary for certificate validation.By default,certificate validation is done.But if the user does not want certificate validation,he can add P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false*/
					
//By default, QC statement is checked,and signature wont be created if it is not a 
//qualified certificate. 
boolean checkQCStatement = TestConstants.getCheckQCStatement();
				
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);
		
Signer firstSigner = bs.getSignerList().get(0); 

firstSigner.addCounterSigner(ESignatureType.TYPE_BES, cert , signer, null, params); 
				
//write the contentinfo to file 
AsnIO.dosyayaz(bs.getEncoded(),NEW_SIGNATURE_ADDED_FILE);	
SmartCardManager.getInstance().logout();

byte[] signature = AsnIO.dosyadanOKU(SIGNATURE_FILE);
BaseSignedData bs = new BaseSignedData(signature);

//create parameters necessary for signature creation 
Dictionary<String, Object> params_ = new Dictionary<String, Object>();
ValidationPolicy policy = PolicyReader.readValidationPolicy(new FileStream(POLICY_FILE, 
FileMode.Open, 
FileAccess.Read));
params_[EParameters.P_CERT_VALIDATION_POLICY] = policy;
/*necessary for certificate validation.By default,certificate validation is done.But if the user does not want certificate validation,he can add P_VALIDATE_CERTIFICATE_BEFORE_SIGNING parameter with its value set to false*/

bool checkQCStatement = TestConstants.getCheckQCStatement();
            
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);

Signer firstSigner = bs.getSignerList()[0];

firstSigner.addCounterSigner(ESignatureType.TYPE_BES, cert, signer, null, params_);

//write the contentinfo to file 
AsnIO.dosyayaz(bs.getEncoded(), NEW_SIGNATURE_ADDED_FILE);
SmartCardManager.getInstance().logout();

Ayrık imzada imzalanacak veri BaseSignedData.addContent(…) fonksiyonunun ikinci parametresi false verilerek atanır. Bütünleşik imza ile büyük boyutlu dosyalar imzalanamaz. İmzanın yapısı gereği imzalanacak verinin hepsi belleğe alınmaktadır. Bundan dolayı büyük boyutlu dosyaların imzalanması için ayrık imza kullanmak gerekmektedir.

BaseSignedData bs = new BaseSignedData();
		
File file = new File(MOVIE_FILE);
ISignable signable = new SignableFile(file,2048);
bs.addContent(signable,false);
				
//create parameters necessary for signature creation
HashMap<String, Object> params = new HashMap<String, Object>();
		
ValidationPolicy policy =  PolicyReader.readValidationPolicy(new FileInputStream(POLICY_FILE)); 
params.put(EParameters.P_CERT_VALIDATION_POLICY, policy);
		
//By default, QC statement is checked,and signature wont be created if it is not a 
//qualified certificate. 
boolean checkQCStatement = TestConstants.getCheckQCStatement();
				
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);
		
bs.addSigner(ESignatureType.TYPE_BES, cert, signer, null, params);
	
AsnIO.dosyayaz(bs.getEncoded(), SIGNATURE_FILE);
		
SmartCardManager.getInstance().logout();

BaseSignedData bs = new BaseSignedData();

FileInfo file = new FileInfo(MOVIE_FILE);
ISignable signable = new SignableFile(file, 2048);
bs.addContent(signable, false);

//create parameters necessary for signature creation
Dictionary<String, Object> params_ = new Dictionary<String, Object>();

ValidationPolicy policy = PolicyReader.readValidationPolicy(new FileStream(POLICY_FILE,
FileMode.Open, 
FileAccess.Read));
params_[EParameters.P_CERT_VALIDATION_POLICY] = policy;

bool checkQCStatement = TestConstants.getCheckQCStatement();
            
//Get qualified or non-qualified certificate.
ECertificate cert = SmartCardManager.getInstance().getSignatureCertificate(checkQCStatement, !checkQCStatement);
BaseSigner signer = SmartCardManager.getInstance().getSigner(TestConstants.getPIN(), cert);

bs.addSigner(ESignatureType.TYPE_BES, cert, signer, null, params_);

AsnIO.dosyayaz(bs.getEncoded(), SIGNATURE_FILE);

SmartCardManager.getInstance().logout();

İmzalanan içerik attachExternalContent fonksiyonuna verilerek, ayrık imza bütünleşik imzaya dönüştürülebilir.

byte[] input = AsnIO.dosyadanOKU(AYRIK_IMZA);
BaseSignedData bs = new BaseSignedData(input);
		
File file = new File(IMZALANAN_ICERIK);
ISignable signable = new SignableFile(file,2048);
bs.attachExternalContent(signable);

byte[] input = AsnIO.dosyadanOKU(AYRIK_IMZA);
BaseSignedData bs = new BaseSignedData(input);

FileInfo file = new FileInfo(IMZALANAN_ICERIK);
ISignable signable = new SignableFile(file, 2048);
bs. attachExternalContent(signable);