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();
}
