public virtual void TestISAValidPdf() { String filePath = sourceFolder + "isaValidPdf.pdf"; String signatureName = "Signature1"; PdfDocument document = new PdfDocument(new PdfReader(filePath)); SignatureUtil sigUtil = new SignatureUtil(document); PdfPKCS7 pdfPKCS7 = sigUtil.ReadSignatureData(signatureName); NUnit.Framework.Assert.IsTrue(pdfPKCS7.VerifySignatureIntegrityAndAuthenticity()); NUnit.Framework.Assert.IsFalse(sigUtil.SignatureCoversWholeDocument(signatureName)); String textFromPage = PdfTextExtractor.GetTextFromPage(document.GetPage(1)); // We are working with the latest revision of the document, that's why we should get amended page text. // However Signature shall be marked as not covering the complete document, indicating its invalidity // for the current revision. NUnit.Framework.Assert.AreEqual("This is manipulated malicious text, ha-ha!", textFromPage); NUnit.Framework.Assert.AreEqual(2, sigUtil.GetTotalRevisions()); NUnit.Framework.Assert.AreEqual(1, sigUtil.GetRevision(signatureName)); Stream sigInputStream = sigUtil.ExtractRevision(signatureName); PdfDocument sigRevDocument = new PdfDocument(new PdfReader(sigInputStream)); SignatureUtil sigRevUtil = new SignatureUtil(sigRevDocument); PdfPKCS7 sigRevSignatureData = sigRevUtil.ReadSignatureData(signatureName); NUnit.Framework.Assert.IsTrue(sigRevSignatureData.VerifySignatureIntegrityAndAuthenticity()); NUnit.Framework.Assert.IsTrue(sigRevUtil.SignatureCoversWholeDocument(signatureName)); sigRevDocument.Close(); document.Close(); }
public PdfPKCS7 VerifySignature(SignatureUtil signUtil, String name) { PdfPKCS7 pkcs7 = signUtil.ReadSignatureData(name); Console.Out.WriteLine("Signature covers whole document: " + signUtil.SignatureCoversWholeDocument(name)); Console.Out.WriteLine("Document revision: " + signUtil.GetRevision(name) + " of " + signUtil.GetTotalRevisions()); Console.Out.WriteLine("Integrity check OK? " + pkcs7.VerifySignatureIntegrityAndAuthenticity()); return(pkcs7); }
public static (PdfPKCS7, FileDetailsModel) VerifySignature(FileDetailsModel model, SignatureUtil signUtil, String name) { PdfPKCS7 pkcs7 = signUtil.ReadSignatureData(name); logger.Error("Signature covers whole document: " + signUtil.SignatureCoversWholeDocument(name)); logger.Error("Document revision: " + signUtil.GetRevision(name) + " of " + signUtil.GetTotalRevisions()); logger.Error("Integrity check OK? " + pkcs7.VerifySignatureIntegrityAndAuthenticity()); model.Integrity = pkcs7.VerifySignatureIntegrityAndAuthenticity() == true?"OK":"NOT OK"; return(pkcs7, model); }
private SignedDocumentInfo CollectInfo(String documentPath) { SignedDocumentInfo docInfo = new SignedDocumentInfo(); PdfDocument pdfDoc = new PdfDocument(new PdfReader(documentPath)); PdfAcroForm form = PdfAcroForm.GetAcroForm(pdfDoc, false); SignatureUtil signUtil = new SignatureUtil(pdfDoc); IList <String> names = signUtil.GetSignatureNames(); docInfo.SetNumberOfTotalRevisions(signUtil.GetTotalRevisions()); SignaturePermissions perms = null; IList <SignatureInfo> signInfos = new List <SignatureInfo>(); foreach (String name in names) { SignatureInfo sigInfo = new SignatureInfo(); sigInfo.SetSignatureName(name); sigInfo.SetRevisionNumber(signUtil.GetRevision(name)); sigInfo.SetSignatureCoversWholeDocument(signUtil.SignatureCoversWholeDocument(name)); IList <PdfWidgetAnnotation> widgetAnnotationsList = form.GetField(name).GetWidgets(); if (widgetAnnotationsList != null && widgetAnnotationsList.Count > 0) { sigInfo.SetSignaturePosition(widgetAnnotationsList[0].GetRectangle().ToRectangle()); } PdfPKCS7 pkcs7 = signUtil.ReadSignatureData(name); sigInfo.SetDigestAlgorithm(pkcs7.GetHashAlgorithm()); sigInfo.SetEncryptionAlgorithm(pkcs7.GetEncryptionAlgorithm()); PdfName filterSubtype = pkcs7.GetFilterSubtype(); if (filterSubtype != null) { sigInfo.SetFilterSubtype(filterSubtype.ToString()); } X509Certificate signCert = pkcs7.GetSigningCertificate(); sigInfo.SetSignerName(iText.Signatures.CertificateInfo.GetSubjectFields(signCert).GetField("CN")); sigInfo.SetAlternativeSignerName(pkcs7.GetSignName()); sigInfo.SetSignDate(pkcs7.GetSignDate().ToUniversalTime()); if (TimestampConstants.UNDEFINED_TIMESTAMP_DATE != pkcs7.GetTimeStampDate()) { sigInfo.SetTimeStamp(pkcs7.GetTimeStampDate().ToUniversalTime()); TimeStampToken ts = pkcs7.GetTimeStampToken(); sigInfo.SetTimeStampService(ts.TimeStampInfo.Tsa.ToString()); } sigInfo.SetLocation(pkcs7.GetLocation()); sigInfo.SetReason(pkcs7.GetReason()); PdfDictionary sigDict = signUtil.GetSignatureDictionary(name); PdfString contactInfo = sigDict.GetAsString(PdfName.ContactInfo); if (contactInfo != null) { sigInfo.SetContactInfo(contactInfo.ToString()); } perms = new SignaturePermissions(sigDict, perms); sigInfo.SetIsCertifiaction(perms.IsCertification()); sigInfo.SetIsFieldsFillAllowed(perms.IsFillInAllowed()); sigInfo.SetIsAddingAnnotationsAllowed(perms.IsAnnotationsAllowed()); IList <String> fieldLocks = new List <String>(); foreach (SignaturePermissions.FieldLock Lock in perms.GetFieldLocks()) { fieldLocks.Add(Lock.ToString()); } sigInfo.SetFieldsLocks(fieldLocks); X509Certificate[] certs = pkcs7.GetSignCertificateChain(); IList <CertificateInfo> certInfos = new List <CertificateInfo>(); for (int i = 0; i < certs.Length; i++) { X509Certificate cert = (X509Certificate)certs[i]; CertificateInfo certInfo = new CertificateInfo(); certInfo.SetIssuer(cert.IssuerDN); certInfo.SetSubject(cert.SubjectDN); certInfo.SetValidFrom(cert.NotBefore); certInfo.SetValidTo(cert.NotAfter); certInfos.Add(certInfo); } sigInfo.SetCertificateInfos(certInfos); signInfos.Add(sigInfo); } docInfo.SetSignatureInfos(signInfos); return(docInfo); }