[iText-questions] Could not initialize class com.itextpdf.text.pdf.security.CertificateInfo$X500Name

[Dennis Lindeman]

I am attempting to sign a PDF using an external signature similar to Code
sample 4.12: The client-side application in "Digital Signatures for PDF
documents", A White Paper by Bruno Lowagie (iText Software).

I created this ExternalSignature implementation, to get the signature from
an ARX CoSign device.

import java.security.GeneralSecurityException;
import gvl.ArxCoSignService;
import com.itextpdf.text.pdf.security.DigestAlgorithms;
import com.itextpdf.text.pdf.security.ExternalSignature;

public class ItextExternalSignature implements ExternalSignature {
    ArxCoSignService arxCoSignService = new ArxCoSignService();

    public String username;
    public String password;

    public ItextExternalSignature(String username, String password){
        this.username = username;
        this.password = password;
    }

    public String getHashAlgorithm() {
        return DigestAlgorithms.SHA256;
    }

    public String getEncryptionAlgorithm() {
        return "RSA";
    }

    public byte[] sign(byte[] message) throws GeneralSecurityException {
        byte[] sig = null;
        try {
            sig = arxCoSignService.getSignatureOfDataBuffer(message,
username, password);
        } catch (Exception e) {
            System.out.println("ItextExternalSignature, sign, exception = "
+ e);
            e.printStackTrace();
        }
        System.out.println("ItextExternalSignature, sign, sig = " + sig);
        return sig;
    }
}

**************************************************************

I use this code to sign the PDF.

    def signTest(username, password) {
        def fileInStream
        File testPdf = new File("C:/TestDoc.pdf")
        byte[] pdfBytesTest = new byte[(int) testPdf.length()]
        fileInStream = new FileInputStream(testPdf)
        fileInStream.read(pdfBytesTest, 0, (int) testPdf.length())
        fileInStream.close()
        KeyStore ks = KeyStore.getInstance("pkcs12")
        ks.load(new FileInputStream("C:/Users/dlindeman/mykeystore.pfx"),
"dll".toCharArray())
        String alias = (String)ks.aliases().nextElement()
        PrivateKey key = (PrivateKey)ks.getKey(alias, "dll".toCharArray())
        Certificate[] certificateChain = ks.getCertificateChain(alias)
        // reader and stamper
        PdfReader reader = new PdfReader("C:/TestDoc.pdf")
        char ch = '\0'
        PdfStamper stamper = PdfStamper.createSignature(reader, new
FileOutputStream("C:/TestDoc_Signed.pdf"), ch)
        // appearance
        PdfSignatureAppearance appearance = stamper.getSignatureAppearance()
        appearance.setVisibleSignature("mySig")
        appearance.setReason("It's personal.")
        appearance.setLocation("Foobar")
        // Create the signature
        ExternalDigest externalDigest = (ExternalDigest) new
BouncyCastleDigest();
        ExternalSignature externalSignature = (ExternalSignature) new
ItextExternalSignature(username, password)
        MakeSignature.signDetached(appearance, externalDigest,
externalSignature, certificateChain, null, null, null, 0,
CryptoStandard.CMS)
    }

I get this exception on the last line:

2012-10-30 10:00:55,596 [http-bio-8080-exec-1] ERROR
errors.GrailsExceptionResolver  - NoClassDefFoundError occurred when
processing request: [POST] /segway/ecvi/index - parameters:
id: 15
certNumber: 12-IA-100
_action_previewPdf: Preview
Could not initialize class
com.itextpdf.text.pdf.security.CertificateInfo$X500Name. Stacktrace follows:
org.codehaus.groovy.grails.web.servlet.mvc.exceptions.ControllerExecutionException:
Executing action [previewPdf] of controller [gvl.cert.EcviController]
caused exception: Runtime error executing act
ion
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
Caused by:
org.codehaus.groovy.grails.web.servlet.mvc.exceptions.ControllerExecutionException:
Runtime error executing action
        ... 3 more
Caused by: java.lang.reflect.InvocationTargetException
        ... 3 more
Caused by: java.lang.NoClassDefFoundError: Could not initialize class
com.itextpdf.text.pdf.security.CertificateInfo$X500Name
        at
com.itextpdf.text.pdf.security.CertificateInfo.getSubjectFields(CertificateInfo.java:354)
        at
com.itextpdf.text.pdf.PdfSignatureAppearance.getAppearance(PdfSignatureAppearance.java:883)
        at
com.itextpdf.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:1242)
        at
com.itextpdf.text.pdf.security.MakeSignature.signDetached(MakeSignature.java:125)
        at gvl.PdfITextService.signTest(PdfITextService.groovy:1162)
        at gvl.cert.EcviController.previewPdf(EcviController.groovy:135)
        ... 3 more

Any help determining why I am getting this exception will be appreciated.

Thanks.

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