===== Conversion Between Signature Types =====

The conversion between signature types can be performed by using the class ''BaseSignedData''. Firstly, the list of the signers are accessed by the method ''BaseSignedData.getSignerList()'' from the signed document. Then the signer to be converted is found in the list and the method ''convert()'' of the signer is called.
The sample code below converts a BES signature to EST:

<sxh java;title:Java>
byte[] inputBES = AsnIO.dosyadanOKU(BES_SIGNATURE_FILE);
		
BaseSignedData sd = new BaseSignedData(inputBES);
							
HashMap<String, Object> params = new HashMap<String, Object>();
				
//necessary for getting signaturetimestamp
params.put(EParameters.P_TSS_INFO, getTSSettings());

ValidationPolicy policy=  PolicyReader.readValidationPolicy(
New FileInputStream(POLICY_FILE));
			
				
//necessary for validating signer certificate according to time of //signaturetimestamp
params.put(EParameters.P_CERT_VALIDATION_POLICY, policy);
				
sd.getSignerList().get(0).convert(ESignatureType.TYPE_EST, params);
				
AsnIO.dosyayaz(sd.getEncoded(),CONVERTED_TO_EST_FILE);
</sxh>

<sxh csharp;title:C#>
byte[] inputBES = AsnIO.dosyadanOKU(BES_SIGNATURE_FILE);

BaseSignedData sd = new BaseSignedData(inputBES);


Dictionary<String, Object> params_ = new Dictionary<String, Object>();

//necessary for getting signaturetimestamp
params_[EParameters.P_TSS_INFO] = getTSSettings();

ValidationPolicy policy = PolicyReader.readValidationPolicy(new FileStream(POLICY_FILE,
FileMode.Open, 
FileAccess.Read));

//necessary for validating signer certificate according to time of //signaturetimestamp
params_[EParameters.P_CERT_VALIDATION_POLICY] = policy;

sd.getSignerList()[0].convert(ESignatureType.TYPE_EST, params_);

AsnIO.dosyayaz(sd.getEncoded(), CONVERTED_TO_EST_FILE);
</sxh>