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The following Java code example verifies a digital signature
that is located in a signed PDF document that is based on a PDF
file named LoanSigned.pdf. The verification time is set to current
time and the revocation checking option is set to best effort. (See Verifying Digital Signatures.)
/*
* This Java Quick Start uses the following JAR files
* 1. adobe-signatures-client.jar
* 2. adobe-livecycle-client.jar
* 3. adobe-usermanager-client.jar
* 4. adobe-utilities.jar
* 5. jbossall-client.jar (use a different JAR file if the LiveCycle server is not deployed
* on JBoss)
* 6. jacorb.jar (use a different JAR file if the LiveCycle server is not deployed on JBoss)
* 7. jnp-client.jar (use a different JAR file if the LiveCycle server is not deployed on JBoss)
*
* The JBoss files must be kept in the jboss\client folder. You can copy the client folder to
* your local development environment and then include the 3 JBoss JAR files in your class path
*
* These JAR files are located in the following path:
* <install directory>/sdk/client-libs/common
*
* The adobe-utilities.jar file is located in the following path:
* <install directory>/sdk/client-libs/jboss
*
* The jbossall-client.jar file is located in the following path:
* <install directory>/jboss/client
*
* If you want to invoke a remote LiveCycle server instance and there is a
* firewall between the client application and the server, then it is
* recommended that you use the SOAP mode. When using the SOAP mode,
* you have to include additional JAR files located in the following
* path
* <install directory>/sdk/client-libs/thirdparty
*
* For information about the SOAP
* mode and the additional JAR files that need to be included,
* see "Setting connection properties" in Programming
* with LiveCycle
*
* For complete details about the location of the LiveCycle JAR files,
* see "Including LiveCycle Java library files" in Programming
* with LiveCycle
*/
import java.util.*;
import java.io.FileInputStream;
import com.adobe.livecycle.signatures.client.*;
import com.adobe.livecycle.signatures.client.types.*;
import com.adobe.livecycle.signatures.pki.client.types.common.RevocationCheckStyle;
import com.adobe.idp.Document;
import com.adobe.idp.dsc.clientsdk.ServiceClientFactory;
import com.adobe.idp.dsc.clientsdk.ServiceClientFactoryProperties;
public class VerifySignature{
public static void main(String[] args) {
try
{
//Set connection properties required to invoke LiveCycle
Properties connectionProps = new Properties();
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_DEFAULT_EJB_ENDPOINT, "jnp://hiro-xp:1099");
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_TRANSPORT_PROTOCOL,ServiceClientFactoryProperties.DSC_EJB_PROTOCOL);
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_SERVER_TYPE, "JBoss");
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_CREDENTIAL_USERNAME, "administrator");
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_CREDENTIAL_PASSWORD, "password");
//Create a ServiceClientFactory instance
ServiceClientFactory myFactory = ServiceClientFactory.createInstance(connectionProps);
//Create a SignatureServiceClient object
SignatureServiceClient signClient = new SignatureServiceClient(myFactory);
//Specify a PDF document that contains a digital signature
FileInputStream fileInputStream = new FileInputStream("C:\\Adobe\LoanSigned.pdf");
Document inDoc = new Document (fileInputStream);
//Specify the name of the signature field
String fieldName = "SignatureField1";
//Create a PKIOptions object that contains PKI run-time options
PKIOptions pkiOptions = new PKIOptions();
pkiOptions.setVerificationTime(VerificationTime.CURRENT_TIME);
pkiOptions.setRevocationCheckStyle(RevocationCheckStyle.BestEffort);
//Verify the digital signature
PDFSignatureVerificationInfo signInfo = signClient.verify2(
inDoc,
fieldName,
pkiOptions,
null);
//Get the Signature Status
SignatureStatus sigStatus = signInfo.getStatus();
String myStatus="";
//Determine the status of the signature
if (sigStatus == SignatureStatus.DynamicFormSignatureUnknown)
myStatus = "The signatures located in the dynamic PDF form are unknown";
else if (sigStatus == SignatureStatus.DocumentSignatureUnknown)
myStatus = "The signatures located in the PDF document are unknown";
else if (sigStatus == SignatureStatus.CertifiedDynamicFormSignatureTamper)
myStatus = "The signatures located in a certified PDF form are valid";
else if (sigStatus == SignatureStatus.SignedDynamicFormSignatureTamper)
myStatus = "The signatures located in a signed dynamic PDF form are valid";
else if (sigStatus == SignatureStatus.CertifiedDocumentSignatureTamper)
myStatus = "The signatures located in a certified PDF document are valid";
else if (sigStatus == SignatureStatus.SignedDocumentSignatureTamper)
myStatus = "The signatures located in a signed PDF document are valid";
else if (sigStatus == SignatureStatus.SignatureFormatError)
myStatus = "The format of a signature in a signed document is invalid";
else if (sigStatus == SignatureStatus.DynamicFormSigNoChanges)
myStatus = "No changes were made to the signed dynamic PDF form";
else if (sigStatus == SignatureStatus.DocumentSigNoChanges)
myStatus = "No changes were made to the signed PDF document";
else if (sigStatus == SignatureStatus.DynamicFormCertificationSigNoChanges)
myStatus = "No changes were made to the certified dynamic PDF form";
else if (sigStatus == SignatureStatus.DocumentCertificationSigNoChanges)
myStatus = "No changes were made to the certified PDF document";
else if (sigStatus == SignatureStatus.DocSigWithChanges)
myStatus = "There were changes to a signed PDF document";
else if (sigStatus == SignatureStatus.CertificationSigWithChanges)
myStatus = "There were changes made to the PDF document.";
//Get the signature type
SignatureType sigType = signInfo.getSignatureType();
String myType = "";
if (sigType.getType() == PDFSignatureType.AUTHORSIG)
myType="Certification";
else if(sigType.getType() == PDFSignatureType.RECIPIENTSIG)
myType="Recipient";
//Get the identity of the signer
IdentityInformation signerId = signInfo.getSigner();
String signerMsg = "";
if (signerId.getStatus() == IdentityStatus.UNKNOWN)
signerMsg = "Identity Unknown";
else if (signerId.getStatus() == IdentityStatus.TRUSTED)
signerMsg = "Identity Trusted";
else if (signerId.getStatus() == IdentityStatus.NOTTRUSTED)
signerMsg = "Identity Not Trusted";
//Get the Signature properties returned by the Signature service
SignatureProperties sigProps = signInfo.getSignatureProps();
String signerName = sigProps.getSignerName();
System.out.println("The status of the signature is: "+myStatus +". The signer identity is "+signerMsg +". The signature type is "+myType +". The name of the signer is "+signerName+".");
}
catch (Exception ee)
{
ee.printStackTrace();
}
}
}
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