That problem was fixed in version 2.0.0.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Khurram Saleem
> Sent: Tuesday, September 25, 2007 9:58 AM
> To: [email protected]
> Cc: [EMAIL PROTECTED]; 'Yasir Khan'
> Subject: [iText-questions] URGENT: Exception occurred during
> verificartionof signature created in Adobe Acrobat 8.
>
> Hi iText Team,
>
>
>
> I'm having a problem in verification of signature signed
> through Adobe Acrobat 8.0.
>
> My development environment is JDK1.5.0_08, iText2.0 and IAIK
> JCE Provider 3.13.
>
>
>
> Please help in me in this regard and guide me if I'm doing
> anything wrong. This code is working fine with the older
> versions of Adobe e.g. 7.x and 6.x.
>
> I have also attached the PDF signed through Adobe 8.0.
>
>
>
> Following is the exception which is occurring during verification:
>
>
>
> EXCEPTION
>
> ==========
>
> ExceptionConverter: java.security.NoSuchAlgorithmException:
> SHA1with1.2.840.113549.1.1.5 Signature not available
>
> at java.security.Signature.getInstance(Signature.java:208)
>
> at com.lowagie.text.pdf.PdfPKCS7.<init>(PdfPKCS7.java:326)
>
> at
> com.lowagie.text.pdf.AcroFields.verifySignature(AcroFields.java:1739)
>
> at
> com.lowagie.text.pdf.AcroFields.verifySignature(AcroFields.java:1695)
>
> at
> itextpdfsigning.ASC_VerifyPKCS7.verifyPDF(ASC_VerifyPKCS7.java:269)
>
> at
> itextpdfsigning.ASC_VerifyPKCS7.main(ASC_VerifyPKCS7.java:67)
>
>
>
> SAMPLE CODE
>
> ===========
>
> //Member Variables
>
> PdfPKCS7 m_objPdfPKCS7 = null;
>
> PdfDictionary m_objPdfDictionary = null;
>
> boolean m_bSignatureCoversWholeDocument = false;
>
> int m_iRevision = 0;
>
> byte [] m_btRevision = null;
>
> X509Certificate m_objSignerCertificate = null;
>
> InputStream m_objPKCS7Stream = null; // Contains the PDF
> associated with a revision
>
> PdfReader reader = null;
>
> PdfWriter writer = null;
>
> byte[] m_baPassword;
>
> AcroFields m_objAcroFields=null;
>
> ContentInfo contentInfo = null;
>
> SignedData signedData = null;
>
> SignerInfo[] signerInfo = null;
>
>
>
> /*******************STARTS >> MAIN BUSINESS LOGIC
> METHOD*******************************/
>
>
>
> public void verifyPDF(){
>
> String str_fieldName = null;
>
> try {
>
> System.out.println("Verifying PDF ..: " + m_strFileToVerify);
>
> m_objPKCS7Stream = new FileInputStream(new
> File(m_strFileToVerify));
>
> reader = new PdfReader(m_objPKCS7Stream, null);
>
> m_objAcroFields = reader.getAcroFields();
>
> ArrayList obj_Names = m_objAcroFields.getSignatureNames();
>
> str_fieldName = (String)obj_Names.get(0);
>
> System.out.println("Signature Name..: " + str_fieldName);
>
> m_objPdfPKCS7 =
> m_objAcroFields.verifySignature(str_fieldName); //Exception
> is occurring at the following line
>
> float [] ft_fieldPosition =
> m_objAcroFields.getFieldPositions(str_fieldName);
>
> System.out.println("Signature Position..: " +
> ft_fieldPosition[0] + " : " + ft_fieldPosition[1] + " : " +
> ft_fieldPosition[2] + " : " + ft_fieldPosition[3]);
>
> m_bSignatureCoversWholeDocument =
> m_objAcroFields.signatureCoversWholeDocument(str_fieldName);
>
> m_objPdfDictionary =
> m_objAcroFields.getSignatureDictionary(str_fieldName);
>
> m_iRevision = m_objAcroFields.getRevision(str_fieldName);
>
> m_btRevision = getEncodedPKCS7(); //Method No.1
>
> setContents(new File("demo.pkcs7"), m_btRevision);
>
> if(verifySignature()){ // Method No.2
>
> verifyPKCS7(m_btRevision); // Method No.3
>
> System.out.println("Signature...: " + str_fieldName +
> " verified..!!");
>
> }
>
> else{
>
> System.out.println("Signature...: " + str_fieldName +
> " not verified..!!");
>
> }
>
> }
>
> catch (Exception ex) {
>
> System.out.println("Signature...: " + str_fieldName + "
> not verified..!!");
>
> ex.printStackTrace();
>
> }
>
> }
>
>
>
> /*******************ENDS >> MAIN BUSINESS LOGIC
> METHOD*******************************/
>
>
>
>
>
> /*******************FYI >> BUSINESS LOGIC
> METHODS*******************************/
>
>
>
> /***************************************************************/
>
> //Method No.1
>
> public byte[] getEncodedPKCS7(){
>
> return m_objPdfDictionary.get(PdfName.CONTENTS).getBytes();
>
> }
>
>
>
> /**************************************************************/
>
> //Method No.2
>
> public boolean verifySignature(){
>
> boolean b_Verify = false;
>
> try {
>
> setIAIKSecurityProviderPosition(1);
>
> b_Verify = m_objPdfPKCS7.verify();
>
> setIAIKSecurityProviderPosition(3);
>
> }
>
> catch (Exception ex) {
>
> ex.printStackTrace() ;
>
> }
>
> return b_Verify;
>
> }
>
>
>
> /**************************************************************/
>
> //Method No.3
>
> private void verifyPKCS7(byte[] a_btPKCS7) throws Exception{
>
> ASN1Object obj = null;
>
> signedData = null;
>
> boolean b_hasContntentInfo = false;
>
> try{
>
> obj = DerCoder.decode(a_btPKCS7);
>
> ContentInfo contentInfo = new ContentInfo(obj);
>
> signedData = (SignedData)contentInfo.getContent();
>
> b_hasContntentInfo = true;
>
> }catch(Exception a_ex){
>
> System.out.println("No Content info found");
>
> throw new Exception(a_ex.getMessage());
>
> }
>
> if(b_hasContntentInfo == false)
>
> signedData = new SignedData(obj);
>
>
>
> // Shows Signer Information
>
> verifySigners(signedData); //Method No.4
>
> }
>
>
>
> /**************************************************************/
>
> //Method No.4
>
> private void verifySigners(SignedData a_objSignedData) throws
> Exception{
>
> signerInfo = a_objSignedData.getSignerInfos();
>
> // after verifying signature, extract signer info and
> populate objects
>
> for (int i = 0; i < signerInfo.length; i++) {
>
> X509Certificate obj_OnlySignerCert = a_objSignedData.verify(i);
>
> System.out.println("Signer : " +
> obj_OnlySignerCert.getSubjectDN());
>
> showSignerAttributes(signerInfo[i]);
>
> }
>
> }
>
> /**************************************************************/
>
> /*******************FYI >> BUSINESS LOGIC
> METHODS*******************************/
>
>
>
>
>
>
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